Abalone Resurvey in South East Queen Charlotte Islands, 1998 J:

Abalone Resurvey in South East Queen Charlotte Islands, 1998 J:
Abalone Resurvey in South East Queen
Charlotte Islands, 1998
A. Campbell, D. Brotlwer, J: Rogers, and D.C. Miller
Fisheries and Oceans Canada
Science Branch, Pacific Region
Pacific Biological Station
Nanaimo, British Columbia
V9R 5K6
2000
Canadian Manuscript Report of
Fisheries and Aquatic Sciences 2528
1+1
Fisheries and Oceans
Canada
Peches et Oceans
Canada
Science
Sciences
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Canadian Manuscript Report of
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2000
ABALONE RESURVEY IN SOUTH EAST QUEEN CHARLOTTE ISLANDS, 1998
by
A. Campbell, D. Brouwer, J. Rogers 1 , and D.C. Miller
Fisheries and Oceans Canada
Science Branch, Pacific Region
Pacific Biological Station
Nanaimo, British Columbia
V9R 5K6
10perations Branch, North Coast Division
Fisheries and Oceans Canada
417 2 nd Avenue West
Prince Rupert, British Columbia
V8J 1G8
11
Her Majesty the Queen in Right of Canada, 2000,
as represented by the Minister of Fisheries and Oceans,
Cat. No. FS 97-4/2528E ISSN 0706-6473
Correct citation for this publication:
Campbell, A., D. Brouwer, J. Rogers, and D.C. Miller. 2000. Abalone resurvey in south east
Queen CharloUe Islands, 1998. Can. Manuscr. Rep. Fish. Aquat. Sci. 2528: 30 p.
1lI
ABSTRACT
Campbell, A., D. Brouwer, J. Rogers, and D.C. Miller. 2000. Abalone resurvey in south east
Queen Charlotte Islands, 1998. Can. Manuscr. Rep. Fish. Aquat. Sci. 2528: 30 p.
Northern or "Pinto" abalone, Haliotis kamtschatkana, fisheries in British Columbia (B.C.)
have been closed since 1990 due to conservation concerns. The 1998 survey results
indicated that northern abalone population densities were similar to those surveyed during
1984-94, but significantly lower than those found during 1978-79, in south east coast of the
Queen Charlotte Islands, B.C. The similarity in abalone density between the new random sites
and historic index sites suggested that the mean densities from all index sites were reasonably
representative of adult abalone sampled in areas of the south east Queen Charlotte Islands.
The common historic index sites with no "legal" exposed abalone ~ 100 mm shell length)
generally increased from 25 % to over 60 % between the late 1970s and the late 1990s. In
contrast, the index sites with no exposed abalone (of any size) increased from 0 % to 16 %
during 1978-84, and then fluctuated between 5 and 16 % during 1984-98. Although 8 years
had elapsed since closure of the abalone fishery in B.C. there was no statistical evidence of
recovery of northern abalone stocks in the south east coast of the Queen Charlotte Islands by
1998.
IV
RESUME
Campbell, A., D. Brouwer, J. Rogers, and D.C. Miller. 2000. Abalone resurvey in south east
Queen Charlotte Islands, 1998. Can. Manuscr. Rep. Fish. Aquat. Sci. 2528: 30 p.
La peche de I'ormeau nordique, Haliotis kamtschatkana, en Colombie-Britannique est
fermee depuis 1990 par soud de la conservation de ce stock. Les resultats des releves de
1998 indiquent que les densites des populations d'ormeau etaient semblables a celles qui
avaient ete relevees entre 1984 et 1994, mais nettement plus basses que les densites
observees en 1978-1979 sur la cote sud-est des lies de la Reine-Charlotte (ColombieBritannique). La similarite de la densite des ormeaux entre les nouveaux sites choisis au
hasard et les sites indicateurs historiques permet de penser que les densites moyennes de
tous les sites indicateurs etaient raisonnablement representatives des populations d'ormeaux
adultes echantillonnees dans certaines zones du sud-est des lies de la Reine-Charlotte. Le
nombre des sites indicateurs les plus communs, ne presentant aucun ormeau expose de taille
legale t: 100 mm de longueur de fa coquille) a globalement augmente, passant de 25 %
plus de 60 % entre la fin des annees 70 et la fin des annees 90. Par contre, les sites
indicateurs ne presentant aucun ormeau expose (toutes tailles confondues) a augmente,
passant de 0 % 16 % entre 1978 et 1984, puis a fluctue entre 5 % et 16 % de 1984 1998.
Malgre I'intervalle de 8 ans ecoule depuis la fermeture de la peche de I'ormeau en ColombieBritannique, nous n'avions en 1998 aucune indication statistique d'un retablissement des
stocks d'ormeau nordique sur fa cote sud-est des lies de la Reine-Charlotte.
a
a
a
INTRODUCTION
Found from Sitka Island, Alaska to Baja California, the "northern" or "pinto" abalone,
Haliotis kamtschatkana, generally occurs in patchy distribution on exposed and semi-exposed
coasts in British Columbia (B.C.). Northern abalone has been a traditional food of first nations
and a target of recreational divers and a small commercial dive fishery in B.C., until 1990. The
biology and fishery of the northern abalone was reviewed by Sloan and Breen (1988) and
Farlinger and Campbell (1992). Northern abalone stocks have been assessed through
surveys of index sites using a standard survey design since 1978 (Breen and Adkins 1979).
Much of the surveys and commercial fishery for northern abalone were conducted in areas
along the south east Queen Charlotte Islands and the north central coast of B.C. (Pacific
Fishery Management Areas 2, 5 and 6) during 1978-90 (Winther et al. 1995; Harbo 1997;
Campbell et al. 1998). Surveys at index sites in south east Queen Charlotte Islands and the
north central coast of B.C. have provided general time-series trends indicating that the
abundance of northern abalone declined more than 75% between the period of 1978-84 and
remained low until the last survey in 1997 (Winther et al. 1995; Thomas and Campbell 1996;
Campbell et al. 1998). Faced with the possibility of abalone population collapse the northern
abalone fishery has remained closed since 1990 due to conservation concerns.
The objective of this paper was to report on the results of a survey of northern abalone
conducted during May 1998, and to compare estimates of abalone density with those
measured in previous surveys along the south east Queen Charlotte Islands (Fig. 1) (Breen
and Adkins 1979, 1981; Boutillier et al. 1985; Carolsfeld et al. 1988; Winther et al. 1995).
METHODS
The Coast Guard research vessel "Vector" was utilised as a live-aboard platform from
which two dive tender boats were used for the survey of abalone during 8 - 21 May, 1998.
Each dive tender boat was equipped with a hand held GPS (Global Positioning System) unit.
Diving participants (in two dive teams, 3 divers per team) included personnel from the Fisheries
and Oceans Canada (DFO).
Most of the sites previously sampled during 1994 by Winther et al. (1995) in south east
Queen Charlotte Islands (QCI) were resurveyed during 1998 (Fig. 1). The index sites were
found from previous chart records, written site descriptions and GPS positions. Additional
sample sites were randomly chosen (on a ruler scale along the coastline on charts) within each
general area of the 1994 survey. The sites were grouped into eight general areas (A)
Cumshewa Inlet, (B) Selwyn Inlet, (C) Tanu Island, (D) Upper Juan Perez Sound, (E) Lower
Juan Perez Sound, (F) Skincuttle Inlet, (G) Carpenter Bay, (H) Kunghit Island (Fig. 1).
The "Breen" survey method, described by Breen and Adkins (1979), has been used
consistently throughout the historical abalone surveys in B.C. Once each site was located,
2
2
divers randomly placed a 1 m quadrat at the top of the abalone zone and then sampled 16 m
plots (4 rows of 4 quadrats) within a 7 m by 17 m area. Vegetation was cleared from the
substrate and all visible "exposed" abalone were counted and collected within each quadrat.
Divers recorded the dominant vegetation, substrate type, maximum and minimum depths, and
2
time taken to sample the site and the number of abalone in each quadrat, underwater. The
shell length (mm, SL) for each abalone in each quadrat was measured in situ under water with
callipers. A sample for the density estimates was considered to be one site, with the 16
quadrats per site normally used as secondary sampling units (except for the 1994 sUNey,
when 32-64 quadrats per site were sUNeyed).
In previous sUNeys divers collected all visible abalone and also lifted rocks to look for
'cryptic' abalone. In this survey, however, divers did not look for cryptic abalone to reduce the
time taken to sample each site and to increase the sample size for the overall sUNey (Winther
et al. 1995; Campbell 1996). Sampling for only the exposed abalone is more efficient, since
attempting to find all cryptic abalone is time consuming, the estimates are unreliable and the
majority (>90%) of fully mature abalone (Le., =::70 mm SL) are exposed (Campbell 1996).
Abalone densities presented in this survey refer only to exposed abalone and are compared to
only the exposed abalone densities calculated from the previous surveys.
For the random samples, divers swam freely for 1-17 min looking for abalone. If
abalone were seen, a 16 - quadrat sample was taken. If no abalone were seen, the site was
treated as a zero abalone count sample. In a few situations for the random samples, where
abalone were seen, only abalone counts per minute were recorded (a 16-quadrat sample was
not taken); this type of sample was not included in any analysis for this report. Additional
abalone were collected, brought to the surface and SL measured from areas outside the 16quadrat samples to provide supplementary data on size frequency data, especially in areas
with low abalone density.
2
Abalone density was expressed as the number / m for total (all sizes) and size
categories of mature (=:: 70 mm SL), prerecruit (92-99 mm SL), new recruit (100-106 mm SL)
and legal (=:: 100 mm SL). The smallest size that 100 % of abalone were mature was found to
be approximately 70 mm SL by Campbell et al. (1992). The prerecruit and recruit sizes were
estimated from abalone growth CUNes provided by Sloan and Breen (1988). Data for the
youth « 70 mm SL) size group, which includes mostly juveniles and some mature abalone, are
included in this paper, but should be treated with caution and not considered representative
since many individuals can be cryptic and would not have been sampled. The number of
abalone measured for SL from a site occasionally did not match the number of abalone
recorded by divers, because some individuals were not accessible (e.g., abalone wedged in a
crevice). Consequently, densities by size category (D j ) were calculated as Di = Pi D, where the
proportion of abalone in each size category (Pi = the number per category i divided by the total
abalone measured in the sample) was multiplied by the total density of abalone (D) counted by
divers from the 16-quadrat sample.
The historic index sites were originally chosen within areas that were known to contain
high densities and represented the productive fishing areas for H. kamtschatkana in the south
east QCI. A Mann-Whitney U test was used to compare abalone densities between the
historic index sites and the random sites. The density data for both the index sites and the
random sites were combined (within each size category and area) for subsequent comparisons
between areas sampled during 1998 using a Kolmogorov - Smirnov two - sample test.
Abalone densities sUNeyed between two years (of each size category and historical common
index sites only) were compared using the two-tailed Wilcoxon signed-rank test. Comparisons
between years (data from surveys during 1978-79 were combined) were limited to 56 common
3
historic index sites where only total and legal-sized abalone data were available, and were
limited to 25 historic common index sites where all size categories were available.
RESULTS
SURVEY SUMMARY
A total of 116 historic and random index sites (excluding 12 random swims with no
abalone seen) were sampled for abalone density in 8 general areas in the south east QCI
during 13 dive days in May, 1998 (Appendix 1). An average of 1.61 (minimum 0.69, maximum
2.94) minutes/quadrat, and 25.71 (minimum 11, maximum 47) minutes/site, was spent
sampling per dive team.
SIZE FREQUENCY
Comparison between areas
The mean size was 76.6 mm SL for all abalone measured during the south east QCI,
1998 survey (Fig. 2, Table 1). The smallest abalone measured was 11 mm SL and the largest
measured was 154 mm SL. The mean size was smallest from the sampled sites in Selwyn
Inlet, with no legal-sized abalone found (Fig. 3, Table 1).
Comparison between years
The mean SL and % "legal" size have fluctuated over the last five surveys, without any
clear trends (Table 2).
DENSITY
Comparison between areas
There was no difference (p>0.05, Mann-Whitney U test) in abalone density (total 0.49,
0.54; mature 0.23, 0.18; and legal 0.09, 0.10) between the historic index sites and the random
sites (N = 66, 62), respectively, for all areas combined sampled during 1998 (Appendix 1, 2) .
. These results suggested that the historic index sites were representative of the average
abalone densities found in the sampled areas during 1998.
Total abalone densities, by area, were generally higher further south of Cumshewa Inlet
(Table 3). Densities for various size groups were generally similar between areas, except for
Cumshewa Inlet where there were the lowest abalone densities (Table 3).
Comparison between years
Mean density of different abalone size groups for all historic index sites and 56 and 11
comparable sites were compared (Table 4,5,6,7,8,9, Appendix 3,4,5). Abalone densities
declined significantly between 1978 and 1984 and subsequently fluctuated. There was a
2
significant increase in total density from 0.33 to 0.53 abalone/m between 1994 and 1998, but
4
no more than in 1984-90 (Table 7, 8). In all other size categories, there appears to be no
significant change since 1984 (Table 8, 9).
FREQUENCY OF SITES WITH ABALONE
Comparison between areas
Overall, the percentage of sites with no exposed abalone was 15.6%, and with no
exposed legal-sized abalone was 61.7%, for all random and historical index sites sampled
(N=128) in 1998; between areas, these values ranged from 7.1 % to 83.3% and 33.3% to
83.3%, respectively (Table 10). Taking only 56 common historic index sites, the percentage of
sites with no exposed abalone was 7.1 %, or with no legal-sized exposed abalone was 69.6 %,
in 1998 (Table 11).
Comparison between years
2
The frequency of samples indicated there were fewer sites with 2:.1 abalone m- in the
OCI between 1978 and the 1984-98 period (Fig. 4). The percentage of sites with densities of
2
2:. 1.0 or 2:. 0.25 total and or "legal" abalone per m generally declined during 1978-94, but
increased slightly by 1998 (except for the "legal" abalone with 2:. 1.0 density) (Fig. 5). The
percent of index sites with no "legal" exposed abalone (2:. 100 mm SL) generally increased from
25 to over 60 % during in the late 1970s to the late 1990s (Fig. 6, Table 10, 11). In contrast,
the percent of index sites with no exposed abalone (of any size) increased from 0 to 16 %
during 1978-84, and then fluctuated an average of between 5 and 16 % during 1984-98
(Fig. 6, Table 10, 11).
DISCUSSION
Although 8 years had elapsed since closure of the abalone fishery in B.C. there has
been no clear evidence of recovery of northern abalone stocks in either south east OCI (this
study) nor in the central coast of B.C. (Campbell et al. 1998). Mean overall densities of the
total and size groups of exposed northern abalone found in the 1998 survey of south east OCI
2
were similar (or slightly higher by 0 to 0.07 abalone / m ) to those found in the 1997 survey of
the central coast of B.C. (Campbell et al. 1998).
The 1998 survey results indicated that northern abalone population densities were similar
to those surveyed during 1984-94, but significantly lower than those found during 1978-79, in
south east OCI. There may have been a reduction in the decline of northern abalone densities
as evidenced with the 1998 survey results compared to those observed for the previous (197894) surveys in south east OCI. However, densities of exposed pre-recruit and recruit abalone
2
(0.05 and 0.04/ m ) (Table 3) remain far below the replacement levels recommended by Breen
2
2
(1986) of approximately 0.50 and 0.40/ m , respectively [0.55 and 0.45 / m multiplied by 0.90
to remove cryptic abalone (Campbell 1996)].
Although the overall percentage of sites without any (total) abalone seemed to have
stabilised, sites without "legal" (2:. 100 mm SL) abalone increased to >60% (Fig. 6). Decreasing
the number of patches with large mature abalone reduces the reproductive potential of the
population (Campbell 1997). Increasing the frequency and size of patches, and density within
5
patches, may be important in maintaining sufficient brood stock and recruitment for healthy
northern abalone populations in B.C. (Campbell 1997).
Caution is required in interpreting the results of this paper when using the "Breen"
survey method. Sloan and Breen (1988) and Campbell (1996) suggested that to improve the
statistical precision and power, (i.e., to show significant changes in density between years)
sample sizes should be increased and or alternative survey methods could be explored
(Campbell 1997). Caution also should be used in comparing the number (or %) of sites
without abalone between years since changes in the number of secondary sampling units
(quadrats) per site could potentially change the relative quantity of zero sites (Campbell 1996).
The "Breen" survey method has provided a valuable time series of general population trends of
mature emergent northern abalone at indicator index sites in large remote areas throughout
northern half of B.C. Considering the time consuming and logistical difficulty of surveying
abalone at low densities over a large broad spatial scale the survey method has provided a
consistent and logistically reliable procedure. The similarity in abalone density between the
new random sites and index sites suggested that the mean densities from all index sites were
reasonably representative of adult abalone sampled in areas of the central coast of B.C.
(Campbell et al. 1998) and south east QCI. Sampling additional randomly chosen sites in all
areas whenever possible should be encouraged in future broad spatial scale surveys of
northern abalone. Alternate survey methods may require development depending on the
objectives and logistics involved in studying northern abalone (e.g., estimating small juvenile
abundance) (Campbell 1997).
ACKNOWLEDGMENTS
We thank Bart DeFreitas, Paul Shorthouse, and Dan Wagner for helping with the dive
survey, the crew from the Vector for dive tendering assistance, Barbara Lucas for preparing
Fig. 1, Greg Pond for assistance with the data analyses, and Dominique Bureau and Ivan
Winther for reviewing this paper.
REFERENCES CITED
Boutillier, J.A., W. Carolsfeld, P.A. Breen, S. Farlinger, and K. Bates. 1985. Abalone resurvey
in the southeast Queen Charlotte Islands, July 1984. Can. Manuscr. Rep. Fish. Aquat.
Sci. 1818: 87 p.
Breen, P.A. 1986. Management of the British Columbia fishery for northern abalone (Haliotis
kamtschatkana). Can. Spec. Publ. Fish. Aquat. Sci. 92: 300 - 312.
Breen, P.A. and B.E. Adkins. 1979. A survey of abalone populations on the east coast of th€
Queen Charlotte Islands, August 1978. Fish. Mar. Servo Manuscr. Rep. 1490: 125 p.
Breen, P.A. and B.E. Adkins. 1981. Abalone surveys and tagging conducted during 1979.
Can. Manuscr. Rep. Fish. Aquat. Sci. 1623: 88 p.
6
Campbell, A 1996. An evaluation of abalone surveys off southeast Queen Charlotte Island.
Can. Tech. Rep. Fish. Aquat. Sci. 2089: 111 - 131.
Campbell, A 1997. Possible criteria for reopening the northern abalone (Haliotis
kamtschatkana) fishery in British Columbia. Can. Stock Assessment Secretariat Res.
Doc. 97/64: 47 p.
Campbell, A, I. Manley, and W. Carolsfeld. 1992. Size at maturity and fecundity of the
abalone, Haliotis kamtschatkana, in northern British Columbia. Can. Manuscr. Rep. Fish.
Aquat. Sci. 2169: 47-65.
Campbell, A, I. Winther, B. Adkins, D. Brouwer, and D. Miller. 1998. Survey of the Northern
Abalone (Haliotis kamtschatkana) in the central coast of British Columbia, May 1997.
Can. Stock Assessment Secretariat Res. Doc. 98/89: 28 p.
Carolsfeld, W., S. Farlinger, B.C. Kingzett, N.A Sloan, and G. Thomas. 1988. Abalone
resurvey in the southeast Queen Charlotte Islands, June 1987. Can. Manuscr. Rep.
Fish. Aquat. Sci. 1966: 90 p.
Farlinger, S. and A. Campbell. 1992. Fisheries management and biology of northern abalone,
Haliotis kamtschatkana, in the northeast Pacific. p. 395 - 406. In S. A Shepherd, M. J.
Tegner and S. A Guzman del Proo (eds.) Abalone of the world: biology, fisheries and
culture. Fishing News Books, Blackwell Sci. Pub. Ltd., Oxford, U.K., 608 p.
Harbo, R. 1997. Abalone dive fishery (closed). Can. Manuscr. Rep. Fish. Aquat. Sci. 2369:
86-92.
Sloan, N.A and PA Breen. 1988. Northern abalone, Haliotis kamtschatkana, in British
Columbia: fisheries and synopsis of life history information. Can. Special Pub. Fish.
Aquat. Sci. 103: 46 p.
Thomas, G. and A Campbell. 1996. Abalone resurvey in Aristazaballsland, the Estevan
group and Banks Island, June 1993. Can. Tech. Rep. Fish. Aquat. Sci. 2089: 97 - 109.
Winther, I., A Campbell, G.A Thomas, B.E. Adkins, and B.G. Clapp. 1995. Abalone resurvey
in the southeast Queen Charlotte Islands, 1994. Can. Manuscr. Rep. Fish. Aquat. Sci.
2273: 46 p.
7
Table 1. Summary of size frequency data for exposed abalone surveyed in south east QCI, 1998.
Means of densities from areas followed by a common letter, in same column, are not significantly
different (p>O.05) and means in same column with no common letters are significantly different
(p<O.05) using the Kolmogorov - Smirnov two-sample test.
Index and random sites included.
Area
Cumshewa Inlet
Selwyn Inlet
Tanu Island
Upper Juan Perez
Lower Juan Perez
Skincuttle Inlet
Carpenter Bay
Kunghit Island
Total
Mean
61.3bcd
54.6a
81.1bd
73.1c
77.9bc
77.6bc
78.3dc
80.7b
76.6
Shell length (mm SL)
Median
S.E.
Minimum Maximum
60.0
11.7
20
109
55.0
2.5
13
93
80.5
1.9
21
132
76.0
1.7
11
124
80.5
5.0
34
123
79.0
1.7
15
141
73.5
1.8
14
154
81.0
1.6
36
136
77.0
0.8
11
154
Total
Number
7
50
150
202
28
227
214
157
1035
Percent Legal
>100 mm SL
14.29
15.29
16.29
17.29
18.29
19.29
20.29
21.29
22.29
8
Table 2. Mean abalone length and percent of legal sized exposed abalone for all sites sampled in
south east QCI in each year. Sample years 1984, 1987, 1990, and 1998 include only non cryptic
abalone samples for comparison with 1978 and 1994.
Mean Length (mm)
% Legal
Sample Number
1984
75.4
16.00
581
1987
80.8
30.40
718
1990
76.3
20.00
591
1994
77.6
23.30
725
1998
76.6
19.13
1035
Table 3. Mean density (number I square metre) of exposed abalone from the south east QCI 1998
survey. Means of densities from areas followed by a common letter, in same row, are not
significantly different (p>0.05) and means in same row with no common letters are significantly
different (p<0.05) using the Kolmogorov - Smirnov two sample test. Index and random sites
(sample codes 1-3, Appendix 2) included.
No. of Sites
Cumshewa
Selwyn
Tanu
Upper
Lower
Inlet
Inlet
Island
Juan
Juan
Perez
Perez
6
10
15
37
4
Skincuttle Carpenter Kunghit
Total
Inlet
Bay
Island
24
18
14
128
Total
0.07a
0.31abcd
0.63b
0.35d
0.47abcd
0.59bcd
0.75bcd
0.73bc
0.51
Youth (<70 mm SL)
0.04a
0.25ab
0.19ab
0.17b
0.20ab
0.20ab
0.31ab
0.22ab
0.21
(~70
0.03a
0.06ad
0.44bc
0.18cd
0.26abc
0.39bcd
0.43bc
0.50b
0.31
Mature
mm SL)
Pre-Recruit (92-99 mm SL)
0.00
0.01ab
0.05abcd
0.03c
0.06abcd
0.08cd
0.04abcd
0.07d
0.05
New Recruit (100-106 mm SL)
0.00
O.OOe
0.05ab
0.01a
0.06ab
0.05ab
0.03ab
O.10b
0.04
Legal (>100 mm SL)
0.01a
O.OOe
0.14abd
0.04c
0.11acd
0.12abcd
0.18abcd
0.15d
0.10
9
Table 4. Total and legal abalone counts and estimated mean densities (number / square metre)
(number / square m) by survey year from total sites and total quadrats sampled in south east
QCI. Historical index sites only.
Year
Sites
Sampled
Total
Quadrats
Total
Abalone
Legal
Abalone
Total
Density
Legal
Density
1978
1984
1987
1990
1994
1998
65
70
71
69
70
66
1044
1044
1091
1144
2492
1056
2788
587
724
576
747
519
427
103
216
116
172
93
2.75
0.53
0.64
0.46
0.29
0.49
0.40
0.09
0.19
0.10
0.06
0.09
Table 5. Mean abalone density estimates (number / square metre) for 1990, 1994 and 1998.
Historical index sites only.
Abalone Size
1990
0.46
0.10
0.27
0.05
0.04
Total
Legal (~ 100 mm SL)
Mature (~ 70 mm SL)
Pre - Recruit (92-99 mm SL)
New Recruit (100-106 mm SL)
Year
1994
0.29
0.06
0.18
0.03
0.02
1998
0.49
0.09
0.26
0.04
0.03
Table 6. Mean total and legal abalone density estimates (number / square metre) from 56
common survey index sites.
Year
1978
1984
1987
1990
1994
1998
Number of
Quadrats
900
848
871
944
1980
896
Total
Abalone
2553
503
595
527
658
474
Legal
Total
Abalone Density
364
2.93
0.56
85
0.66
126
90
0.51
134
0.33
70
0.53
Legal
Density
0.40
0.09
0.14
0.09
0.06
0.08
10
Table 7.Wilcoxon signed rank probabilities that abalone density estimates were the same
when compared between sample years for 56 common sample sites in south east QCI.
Comparisons were made for density estimates of total abalone and legal sized abalone.
* indicates a difference at the 0.05 level of significance.
Year
1978
Total Abalone
1984
<0.001*
1987
<0.001*
1990
<0.001*
1994
<0.001*
1998
<0.001*
Legal Sized Abalone (.::: 100 mm SL)
1984
<0.001*
1987
<0.001*
1990
<0.001*
1994
<0.001*
1998
<0.001*
1984
Year
1987 1990
1994
0.272
0.569 0.039*
0.004* 0.001 0.06
0.894 0.097 0.728 0.005*
0.085
0.628 0.054
0.134 0.001* 0.174
0.505 0.019 0.602 0.734
Table 8. Mean density estimates (number / square m) for total abalone and size
categories of legal, mature, pre - recruit, and new recruit abalone from 25 sites with length
data in all years sampled in south east QCI.
Number of Quadrats
Total
Legal (.::: 100 mm SL)
Mature (.:::70 mm SL)
Pre - Recruit (92-99 mm S
New Recruit (100-106 mm
1978
404
3.78
0.32
1.70
0.29
0.15
1984
376
0.71
0.09
0.36
0.08
0.04
Year
1987 1990
399
392
0.79 0.46
0.13 0.06
0.38 0.24
0.06 0.04
0.05 0.04
1994
860
0.35
0.06
0.19
0.03
0.02
1998
400
0.61
0.08
0.32
0.04
0.03
11
Table 9. Wilcoxon signed rank probabilities that estimates of exposed abalone density was the
same when compared between sample years for 25 common sites in south east QCI.
Probabilities are presented for total abalone and size categories of legal, mature, pre-recruit
and new recruit abalone. * indicates a difference in density at the 0.05 level of significance.
Year
1978
Total Abalone
<0.001'
1984
1987
<0.001'
<0.001'
1990
1994
<0.001'
1998
<0.001*
Legal Sized Abalone (2: 100 mm SL)
<0.001*
1984
0.009*
1987
0.002*
1990
0.001*
1994
0.001*
1998
Mature Sized Abalone ~70 mm SL)
0.001 *
1984
1987
<0.001 *
<0.001'
1990
1994
<0.001 *
1998
<0.001 *
Pre - Recruit Sized Abalone (92-99 mm SL)
0.014*
1984
0.003*
1987
0.005*
1990
<0.001'
1994
0.001*
1998
New Recruit Sized Abalone (100-106 mm SL)
0.022*
1984
0.008*
1987
0.017*
1990
<0.001'
1994
0.001 *
1998
1984
Year
1987
1990
1994
0.903
0.107
0.019*
0.553
0.009'
0.012*
0.236
0.415
0.609
0.069
0.489
0.277
0.463
0.551
0.083
0.131
0.189
0.752
0.721
0.530
.770
0.140
0.088
0.779
0.049*
0.070
0.553
0.594
0.444
0.085
0.700
0.119
0.132
0.509
0.107
0.275
0.380
0.593
0.752
0.795
0.570
0.475
0.363
0.331
0.377
0.026*
0.1132
0.583
0.721
0.582
12
Table 10. Percent of total sites where no exposed (total) abalone, nor "legal" (> 100 mm SL)
exposed abalone, were found in all historical and random index sites south east QCI, 1998.
Percent of zero site
Total
Legal
Abalone Abalone
Area
83.30
83.30
Cumshewa Inlet
20.00
100.00
Selwyn Inlet
13.30
33.30
Tanu Island
75.70
Upper Juan Pere 16.20
50.00
Lower Juan Pere 25.00
8.30
50.00
SkincuUle Inlet
11.10
66.70
Carpenter Bay
7.10
35.70
Kunghit Island
15.60
61.70
Total
Total
number
of sites
6
10
15
37
4
24
18
14
128
Table 11. Summary by year of the number and percent of sites where no exposed abalone, or no
"legal" (~ 100 mm SL) exposed abalone, were found using 56 common index sites in south
east QCI.
1978
Number of zero sites
Total Abalone
0
Legal Abalone
14
Percent zero sites
Total Abalone
0.00
Legal Abalone
25.00
1984
Year
1987
1990
1994
1998
9
32
4
26
5
33
3
30
4
39
16.07
57.14
7.14
46.43
8.93
58.93
5.36
53.57
7.14
69.64
13
131:30
131:00
Cumshewa Inlet
~----"i" Talunkwan
I.
'"g
N
Skincuttle Inlet
Carpenter ~
Queen
Charlotte
Islands
Bay;;;
Rose Inlet ~~---'n-l
o
o
Luxana
Bay
~
Kunghit I.
;-:woo
13<:30
132.:00
Seal.
in.~
109CIJ
162m
21600
~
131:30
131:00
Fig. 1. General abalone survey area in southern Queen Charlotte Islands.
I!l
g
14
o
o
20
40
60
0.0
80 100 120 140 160
SHELL LENGTH (MM)
Fig. 2. Size frequency of exposed abalone measured from all survey index and random sites
of the south east Queen Charlotte Islands during May, 1998. N = number of abalone
measured.
15
Exposed Abalone - QCI 1998
10
10
1.'
A
N=7
M =61
I
0.2
8
1.2
tAi
0.'
i i
..
0.0 ~
10
C
N=50
M=55
0
"
~
~
0.1
..
~
(,)
0.4 ~
N = 150
M =81
~
.:l
0.02
~
0
O
to
65 70 15 100 115 130 1"51e8'
10
N=28
M=78
E
0'"
0.03
1i
0.02
'I
§
~
0.1
o
0.0
10 2S 40 55 70
as
~
•r
10
~
(J
N=227
M=78
0.04
"
0.03 ~
0.02
•
i
'0
r=
0'"
o
O~
100 115130 1(5100
10 2:5
ShoIlonod>
6lMIl.....
F
.
0.$
0.2
r
10 2S 40 &5 70 85 100 115100 10451eo
25 40 65 70 85 100 115130 145 teo
Sholl.....
0..,
a
r=
0.0
Sholl.....
10
~
~
0.01
10
(J
"U
~
0.03
~
°10 2:5
N=202
M=73
0.05
0.04 ~
0.2
0
0.00
4Q
65 70 85 100 11.5 130 145
0.0
teo
Sholl.....
10
G
N = 214
M =78
H
0.04
0
0
031
~
~
0.02 ~
(,)
N = 157
M = 81
~
0.00
0."
o.04l
0.1)3
(,)
co
0.02
~
!=
f
0'"
o
0.0
10 2S 40 65 10 85 too 115130 145 100
6lMIl.....
o
O~
to 25 40 &5 70 IS 100 1t5 130 145 tea
Sholl.....
Fig. 3. Size frequency of exposed abalone shell length (mm) measured from all
survey index and random sites of each general survey area (A) Cumshewa Inlet,
(B) Selwyn Inlet, (C) Tanu Island, (0) Upper Juan Perez Sound, (E) Lower Juan
Perez Sound, (F) Skincuttle Inlet, (G) Carpenter Bay, (H) Kunghit Island of the
south east Queen Charlotte Islands during May, 1998. N = number of abalone
measured, M = mean shell length (mm).
16
1984
,~
~ "
,o
6
I'"
I.A€Atl ..£\.\LOJE/SO'.'.-R;METFE
" "'
~,L. "
IJE.o.tl.aIW.<:J'/£ISOJAFEI.AETFE
.
.
Q
l
6
"
SO.J.o.FE I.lETFE
""
'i
""
1998
MEAN = 0.5
,~
,o
12
I.lEI\N.o.i\QO'1EI SO'JAFE METFE
MEAN = 0.3
~ "
IJE""j.t<.[lJ..L~1
"
,
'""
1994
1990
,,
MEAN =0.6
,~
"
MEAN =0.5
~ "
1987
MEAN =0.5
,~
I.lEAN.A!'Al..O<lE I SO'J,o,FE l,.IETFE
""
"
,o
6
12
MEAN #.F.A.l0'1E I SOJAR': MEffE
""
Fig. 4. Frequency distributions of different densities (number per square metre) of total
exposed abalone from index sample sites from south east Queen Charlotte Islands during the
1978-98 surveys.
17
100
90
80
70
I-
z
60
0
w
a:
w
50
Cl...
40
65\
A
",
\.
71
\..
\\.!.~I/"
•
66
\69
/
*
*" ',,70//
'.
30
20
10
0
1975
1980
1985
1990
YEAR
1995
2000
100
90
B
80
70
I-
z
60
0
50
w
40
w
a:
Cl...
30
20
10
0
1975
1980
,
,
1985
1990
YEAR
1995
2000
Fig. 5. Percent of all historical index sites that had densities::: 1.0 (cross) and::: 0.25 (dot) for
(A) total and (B) "legal" (::: 100 mm SL) exposed northern abalone per square metre from
surveys in south east QCI, 1978-98. Numbers are samples sizes.
18
10 ()-,.---,-,---r1r-r-...-ro-r-r-.,.-,-.,.-,-,-,-,-,-....--.-r-,
9
8
f-
z
w
o
a:
w
0..
7
6
5
4
3
2
/'¥;-~
66
~
1
1975 1980 1985 1990 1995 2000
YEAR
Fig. 6. Percent of all historical index sites that did not have legal-sized (? 100 mm SL) (dot) or
any size (total) (cross) exposed northern abalone from surveys in south east QCI, 1978-98.
Numbers are samples sizes.
19
Appendix 1. Dive survey summary for abalone per site, south east Queen Charlotte Islands, May 1998.
Sample Codes: 1. Historical index sample; 2. Random index sample; 3. Random swim, no abalone
seen; 4. Extra abalone collection for size frequency data; 5. Random swim, abalone counted; 6. Surface
examination. Substrate Codes: 1. Bedrock - Smooth; 2. Bedrock - Crevices; 3. Boulders (> 13 cm);
4. Cobble (8-13 cm); 5. Gravel (2-8 cm); 6. Pea Gravel (0.3-2 cm); 7. Sand; 8. Shell; 9. Mud
Site No. with alpha-numeric codes are unique codes for each new random sample.
Sample No. of
Site No. Day
Code Quads
Cumshewa Inlet
98-75
21
1
16
16
98-77
21
1
21
16
98-78
1
RR-01
21
3
0
RR-02
0
21
3
SR-02
21
2
16
Selwyn Inlet
98-65
20
1
16
98-66
20
1
16
98-67
20
1
16
98-68
16
20
1
98-69
20
1
16
98-69B
0
20
5
98-70
20
1
16
BR-01
20
2
16
BR-02
20
0
5
BR-03
20
5
0
BR-07
20
2
16
BR-08
20
2
16
BR-09
20
2
16
Tanu Island
98-59
19
1
16
98-60
19
1
16
98-61
19
1
16
98-62
19
1
16
98-63
19
1
16
98-64
1
16
19
98-73
19
1
16
98-74
1
16
19
AR-01
19
2
16
AR-02
19
3
0
AR-03
19
2
16
AR-04
16
19
2
AR-05
19
2
16
AR-06
19
2
16
AR-08
19
5
0
AR-09
19
3
0
Upper Juan Perez
98-36
14
16
98-37
14
16
98-38
14
16
98-39
14
16
98-40
14
16
98-41
14
16
98-44
16
16
98-45
16
16
98-46
15
16
98-48
15
16
Dive Time
Substrate
Start Finish Minutes
Type
Depth (m)
Min
Max
Abalone
Number Density
10:01
10:11
11 :02
10:55
15:02
15:24
10:35
10:31
11:22
11:03
15:10
15:55
34
20
20
8
8
31
57
57
543
75
3
13
3.15
2.03
2.99
-1.74
5.12
1.31
3.81
2.03
3.64
2.20
6.76
3.94
0
0
0
0
0
7
0.00
0.00
0.00
0.00
0.00
0.44
13:57
12:41
13:22
9:41
9:49
10:25
10:46
14:28
9:29
10:47
12:41
13:38
14:21
14:20
13:10
13:40
10:06
10:20
10:32
11 :17
14:41
9:40
10:55
13:01
14:06
14:50
23
29
18
25
31
7
31
13
11
8
20
28
29
2
3
2
2
3
3
13
347
3
23
12
32
3
1.38
-1.05
2.00
-1.38
-1.31
3.35
1.57
5.28
1.90
3.61
0.31
0.88
0.25
0.50
0.00
-1.54
2.56
-3.38
-3.02
3.51
0.56
-1.35
1.74
2.89
4.82
5.18
7.12
3.51
0.95
5
14
4
8
0
1
4
0
2
4
8
2
5
13:20
14:28
10:53
15:50
14:05
12:48
9:27
9:47
15:13
15:58
10:25
14:35
16:17
12:38
15:44
10:10
13:43
14:52
11 :15
16:10
14:27
13:35
9:48
10:08
15:30
16:02
10:47
14:58
16:45
12:57
15:50
10:15
23
24
22
20
22
47
21
21
17
4
22
23
28
19
6
5
23
34
23
34
3
4
43
489
32
4
3
23
3
37
3
7
2.99
-0.03
-2.36
0.03
0.59
0.23
1.90
0.72
0.56
0.03
0.95
1.28
0.75
0.03
-0.89
4.95
1.61
0.26
1.02
2.56
1.54
2.89
2.69
5.48
4.95
1.94
4.56
5.02
1.02
6.99
15
22
2
3
18
6
1
1
3
0
15
26
20
20
6
0
0.94
1.38
0.13
0.19
1.13
0.38
0.06
0.06
0.19
0.00
0.94
1.63
1.25
1.25
9:48
13:03
13:02
14:05
15:02
14:45
9:26
8:58
11 :20
9:22
10:17
13:30
13:33
14:40
15:33
15:06
9:51
9:15
11 :44
10:03
29
27
31
35
31
21
25
17
24
41
2
123
32
2
1
2
23
1
123
37
3.28
-0.39
-0.75
-1.44
-0.79
0.75
2.89
-1.12
5.77
-0.39
5
4
16
6
0
2
3
1
6
0
0.31
0.25
1.00
0.38
0.00
0.13
0.19
0.06
0.38
0.00
9.19
1.90
1.54
2.49
2.17
5.68
5.18
1.18
8.73
0.92
0.25
0.00
0.50
0.13
0.31
0.00
1
20
Appendix 1. (cont'd)
Sample No. of
Site No. Day Code Quads
98-48
15
16
1
98-49
15
1
16
98-50
15
1
16
16
98-51
15
1
98-52
16
15
1
98-53
17
1
16
98-55
1
16
17
98-56
16
1
16
98-57
16
17
1
98-58
16
17
1
CR-01
16
17
2
CR-02
16
3
0
CR-03A 15
16
2
CR-03B 16
2
16
CR-04
15
2
16
CR-05
15
2
16
CR-06
15
2
16
CR-07
17
2
16
CR-08
16
3
0
CR-09
15
16
2
CR-10
16
2
16
CR-11
17
3
0
CR-12
16
2
16
CR-13
15
2
16
CR-14
16
2
16
DR-01
14
2
16
DR-02
3
0
14
DR-03
14
5
0
DR-04
14
2
16
Lower Juan Perez
98-42
14
16
1
98-43
16
14
1
ER-01
14
16
2
ER-01B 14
5
0
ER-02
14
2
16
ER-03
6
0
14
ER-04
14
5
0
Skincuttle Inlet
98-22
11
1
16
16
98-23
11
1
98-24
11
1
16
98-26
11
1
16
98-27
11
5
0
98-28
11
1
16
98-29
11
1
16
98-30
11
1
16
98-31
12
16
1
98-32
12
1
16
98-33
16
12
1
98-34
13
1
16
98-35
12
1
16
FR-01
12
2
16
FR-03
13
3
0
FR-06
13
5
0
Start
9:22
10:21
14:25
14:30
10:24
10:46
9:33
10:58
9:20
8:17
10:00
8:59
15:00
11:07
15:21
11:02
9:44
10:24
10:45
9:10
10:20
8:14
9:35
15:35
9:59
14:06
13:46
15:12
15:23
Dive Time
Substrate
Depth
Finish Minutes Type
Min
10:03
41
37
-0.39
10:38
-0.13
17
23
14:45
20
347
-0.33
14:42
12
34
0.30
29
1
0.56
10:53
11:20
34
2
2.13
-0.72
9:53
20
23
26
34
11:24
2.33
9:55
35
23
-1.48
8:53
36
-1.31
2
20
23
10:20
0.92
9:07
8
1
-0.52
15:16
16
3
-0.82
11:30
23
13
0.07
15:44
23
234
-0.13
11:26
24
234
0.89
10:12
28
328
0.03
10:47
23
234
-0.43
10:46
1
78
-1.05
9:28
18
34
-0.62
10:40
20
314
-0.20
8:25
11
2
-1.87
9:50
15
137
-0.98
15:56
23
21
0.36
10:19
20
2
2.59
14:25
19
-0.36
1
13:54
8
3
-1.28
15:18
6
18
-0.79
15:39
16
2
0.72
(m)
Abalone
Max Numbe Density
0.92
0
0.00
4.46
2
0.13
0.98
1
0.06
1.94
8
0.50
4.49
6
0.38
13
3.44
0.81
1.90
16
1.00
3.31
4
0.25
0.49
1
0.06
5.58
6
0.38
3.54
14
0.88
7.68
0
0.00
10
3.44
0.63
5.64
6
0.38
1.84
13
0.81
3.18
10
0.63
1.67
13
0.81
1.54
6
0.38
-1.05
0
0.00
2.99
6
0.38
2.10
7
0.44
5.02
0
0.00
4.27
2
0.13
2.00
7
0.44
6.53
2
0.13
3.58
7
0.44
3.64
0
0.00
5.77
1
6.96
5
0.31
8:30 8:50
9:13 9:45
10:11 10:45
9:22 9:35
8:23 9:08
10:20 10:21
8:04 8:09
20
32
34
13
45
1
5
2
1
3
23
34
73
23
-0.56
-0.13
0.33
0.20
-0.49
-0.66
0.00
4.04
2.82
4.59
4.46
-0.16
5.91
8.20
6
7
12
7
5
0
4
13:44
15:55
15:13
10:31
14:18
10:10
8:40
8:05
14:09
14:14
10:40
9:53
15:30
14:46
8:55
8:27
43
25
19
39
20
21
27
36
25
34
41
26
24
13
6
9
2
34
1
23
23
23
1
2
342
24
23
13
3
234
237
2
0.62
-0.66
0.00
-1.31
3.84
-0.59
0.82
1.51
2.03
-2.59
0.43
1.64
-0.72
-2.17
6.56
0.13
4.23
1.64
1.64
2.95
5.48
6.63
2.13
3.81
4.99
2.33
2.40
4.59
1.57
0.46
8.20
1.77
17
2
2
9
1
4
6
11
2
0
16
15
4
4
0
4
14:27
16:20
15:32
11:10
14:38
10:31
9:07
8:41
14:34
14:48
11 :21
10:19
15:54
14:59
9:01
8:36
0.38
0.44
0.75
0.31
1.06
0.13
0.13
0.56
0.25
0.38
0.69
0.13
0.00
1.00
0.94
0.25
0.25
0.00
21
Appendix 1. (cont'd)
Sample No. of
Site No. Day Code Quads
GR-01
13
16
2
GR-02
13
2
16
GR-03
13
2
16
HR-01
11
2
16
HR-02
11
2
16
HR-03
11
5
0
HR-04
16
11
2
HR-05
11
5
0
IR-01
16
12
2
16
IR-02
11
2
IR-03
11
2
16
IR-05
16
12
2
Carpenter Bay
98-10
9
1
16
98-11
9
1
16
98-12
9
1
16
98-14
10
1
16
98-15
10
1
16
98-17
10
1
16
98-18
10
1
16
98-19
10
1
16
98-20
10
1
16
98-21
10
1
16
JR-01
10
5
0
JR-02
10
3
0
JR-03
10
3
0
JR-04
10
2
16
JR-05
10
2
16
JR-06
10
2
16
KR-01
9
2
16
KR-02
9
2
16
KR-03
10
2
16
Kunghit Island
98-01
8
1
16
98-02
8
1
16
98-03
9
1
16
98-04
9
3
0
98-07
8
1
16
98-71
8
1
16
98-79
8
1
16
LR-01
8
5
0
LR-02
8
5
0
MR-01
8
5
0
NR-01
8
2
16
NR-02
8
2
16
OR-01
9
2
16
OR-02
9
2
16
PR-01
8
2
16
PR-02
9
2
16
PR-03
5
9
0
PR-04
16
9
2
Start
9:20
8:55
8:13
13:49
9:27
8:04
9:30
8:52
8:36
14:51
15:48
8:36
Dive Time
Substrate
Depth
Finish Minutes
Min
Type
9:31
11
3
1.02
9:22
27
345
2.62
28
3
8:41
0.43
14:06
17
21
-1.87
9:51
24
234
3.15
8:13
9
14
0.85
10:08
38
2
0.43
9:10
18
23
-0.20
9:09
33
27
0.82
15:25
34
324
-2.40
16:18
30
12
-0.36
8:55
19
237
2.46
14:05
15:00
14:23
7:51
8:03
8:40
10:25
9:34
14:10
14:35
14:59
13:45
13:15
13:26
10:10
9:30
15:33
15:41
8:45
14:40
15:23
15:06
8:12
8:32
9:02
10:50
9:47
14:40
15:04
15:17
14:00
13:32
13:53
10:33
9:48
15:54
16:10
9:05
35
23
43
21
29
22
25
13
30
29
18
15
17
27
23
18
21
29
20
23
1
34
238
1
238
3
1
13
13
16:02
15:00
8:34
7:51
9:44
14:12
8:57
13:42
15:17
8:37
8:40
9:35
8:14
9:14
16:00
9:18
10:13
7:50
16:21
15:35
8:57
8:07
9:56
14:50
9:21
13:57
15:29
8:47
9:15
10:01
8:51
9:38
16:30
9:48
10:20
8:10
19
35
23
16
12
38
24
15
12
10
35
26
37
24
30
30
7
20
23
23
23
237
745
435
23
135
135
231
439
23
32
23
34
12
1
234
37
1
23
1
23
23
3
124
-0.20
0.16
2.56
2.33
0.00
1.48
2.00
1.71
0.30
1.02
-2.72
(m)
Abalone
Max Numbe Density
7.91
7
0.44
4.59
15
0.94
2.40
13
0.81
-0.56
5
0.31
27
5.45
1.69
2.49
2
5.35
20
1.25
1.77
4
5.09
17
1.06
-0.43
8
0.50
1.94
12
0.75
7.05
11
0.69
4.40
2.79
3.54
5.94
3.61
5.41
2.99
4.33
2.26
3.31
-0.43
-2.33
4.49
1.05
0.39
2.20
0.46
5.87
5.81
4.66
4.66
3.84
4.07
0.82
-1.02
-0.23
2.79
1.94
1.41
-0.13
-0.49
1.38
-0.98
-0.95
0.92
-0.52
-0.43
-1.28
-0.95
-0.89
0.72
0.10
1.51
0.82
6.30
0.00
5.28
6.50
7.68
1.87
2.00
1.35
2.40
3.02
1.08
8
17
14
6
48
10
5
8
40
7
12
0
0
10
8
3
3
3
25
5
15
14
0
2
11
5
5
2
3
11
2
20
35
14
27
1
3
0.50
1.06
0.88
0.38
3.00
0.63
0.31
0.50
2.50
0.44
0.00
0.00
0.63
0.50
0.19
0.19
0.19
1.56
0.31
0.94
0.88
0.00
0.13
0.69
0.31
0.69
0.13
1.25
2.19
0.88
1.69
0.19
22
Appendix 2. Density for exposed abalone by size group surveyed per site, south east Queen Charlotte Islands,
May 1998. Sample Codes: 1. Historic index sample; 2. Random index sample; 3. Random swim, no abalone
seen; 4. Extra abalone collection for size frequency data; 5. Random swim, abalone counted; 6. Surface
examination. D density samples; SF size frequency samples.
Site No. with alpha-numeric codes are unique codes for each new random sample.
=
Sample
Site No.
Code
Cumshewa Inlet
98-75
1
98-77
1
98-78
1
RR-01
3
RR-02
3
SR-02
2
Selwyn Inlet
98-65
1
98-66
1
98-67
1
98-68
1
98-69
1
98-69B
5
98-70
1
BR-01
2
BR-02
5
BR-03
5
BR-07
2
BR-08
2
BR-09
2
Tanu Island
98-59
1
98-60
1
98-61
1
98-62
1
98-63
1
98-64
1
98-73
1
98-74
1
AR-01
2
AR-02
3
AR-03
2
AR-04
2
AR-05
2
AR-06
2
AR-08
5
AR-09
3
Upper Juan Perez
98-36
1
98-37
1
98-38
1
98-39
1
98-40
1
98-41
1
98-44
1
98-45
1
98-46
1
98-48
1
=
No. of
Quads
No. of Abalone
SF
D
<70
Exposed Density by Size Group (mm SL)
>70
92-99
>100
100-106
Total
0.00
0.00
0.00
0.00
0.00
0.25
0.00
0.00
0.00
0.00
0.00
0.19
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.44
0.25
0.63
0.13
0.50
0.00
0.06
0.25
0.13
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.31
0.88
0.25
0.50
0.00
a
a
a
a
a
a
a
a
a
a
a
a
16
7
7
16
16
16
16
16
5
14
4
8
5
14
4
8
a
a
1
4
4
a
a
0.19
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.25
0.00
16
16
16
2
4
8
2
5
8
2
5
0.44
0.13
0.25
0.06
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.50
0.13
0.31
16
16
16
16
16
16
16
16
16
15
22
2
3
18
6
1
1
3
15
22
2
3
17
6
1
1
3
0.88
1.25
0.06
0.13
0.73
0.38
0.06
0.06
0.19
0.00
0.81
0.38
0.92
0.81
0.13
0.25
0.00
0.00
0.07
0.00
0.06
0.00
0.00
0.00
0.06
0.00
0.13
0.13
0.19
0.13
0.00
0.00
0.07
0.06
0.00
0.00
0.00
0.00
0.06
0.00
0.20
0.06
0.38
0.69
0.00
0.06
0.07
0.25
0.00
0.06
0.06
0.00
0.19
0.00
0.26
0.13
0.94
1.38
0.13
0.19
1.13
0.38
0.06
0.06
0.19
0.00
0.94
1.63
1.25
1.25
16
16
16
a
16
16
a
a
a
a
a
16
16
16
16
15
26
20
20
6
15
26
19
20
0.06
0.13
0.06
0.06
0.40
0.00
0.00
0.00
0.00
0.00
0.13
1.25
0.33
0.44
a
a
0.00
0.00
0.00
0.00
0.00
0.00
5
4
16
6
5
4
15
6
0.31
0.25
0.53
0.19
0.00
0.06
0.06
0.00
0.38
0.00
0.00
0.00
0.47
0.19
0.00
0.06
0.13
0.06
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.31
0.25
1.00
0.38
0.00
0.13
0.19
0.06
0.38
0.00
a
a
16
16
16
16
16
16
16
16
16
16
a
a
2
3
1
6
2
3
1
6
a
a
23
Appendix 2. (cont'd)
Sample No. of
Code Quads
Site No.
16
98-49
1
98-50
16
1
98-51
1
16
98-52
1
16
98-53
1
16
98-55
16
1
98-56
1
16
98-57
1
16
98-58
1
16
CR-01
2
16
CR-02
3
0
CR-03A
2
16
CR-038
2
16
CR-04
16
2
CR-05
2
16
CR-06
2
16
CR-07
2
16
CR-08
3
0
CR-09
2
16
CR-10
2
16
CR-11
3
0
CR-12
2
16
CR-13
16
2
CR-14
2
16
DR-01
2
16
DR-02
3
0
DR-03
0
5
DR-04
2
16
Lower Juan Perez
98-42
1
16
98-43
1
16
ER-01
16
2
ER-018
5
0
ER-02
16
2
ER-03
6
0
ER-04
5
0
Skincutlle Inlet
98-22
1
16
98-23
1
16
98-24
1
16
98-26
1
16
98-27
5
0
98-28
1
16
98-29
1
16
98-30
1
16
98-31
1
16
98-32
16
1
98-33
1
16
98-34
1
16
98-35
1
16
FR-01
2
16
FR-03
3
0
FR-06
5
0
GR-01
2
16
No. of Abalone
SF
0
2
2
1
1
8
8
6
6
13
13
16
16
4
4
1
1
6
6
14
14
0
0
10
10
6
6
13
13
10
8
13
13
6
5
0
0
6
6
7
7
0
0
2
2
7
5
2
2
7
7
0
0
1
5
5
<70
0.13
0.06
0.00
0.38
0.81
0.19
0.00
0.06
0.13
0.13
0.00
0.63
0.38
0.13
0.55
0.00
0.08
0.00
0.06
0.13
0.00
0.06
0.18
0.13
0.19
0.00
Exposed Density by Size Group (mm
>70
92-99 100-106 >100
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.50
0.06
0.38
0.19
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.81
0.06
0.25
0.19
0.25
0.06
0.06
0.00
0.00
0.00
0.00
0.00
0.25
0.00
0.00
0.00
0.75
0.13
0.00
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.69
0.00
0.19
0.00
0.08
0.00
0.00
0.00
0.81
0.38
0.06
0.19
0.30
0.15
0.00
0.00
0.00
0.00
0.00
0.00
0.31
0.06
0.00
0.06
0.31
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.06
0.00
0.00
0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.25
0.00
0.00
0.06
0.00
0.00
0.00
0.00
SL)
Total
0.13
0.06
0.50
0.38
0.81
1.00
0.25
0.06
0.38
0.88
0.00
0.63
0.38
0.81
0.63
0.81
0.38
0.00
0.38
0.44
0.00
0.13
0.44
0.13
0.44
0.00
0.06
0.25
0.06
0.00
0.00
0.31
6
7
12
7
5
0
4
6
5
12
0.31
0.44
0.06
0.06
0.00
0.69
0.06
0.00
0.13
0.00
0.00
0.19
0.00
0.00
0.25
0.38
0.44
0.75
5
0.00
0.31
0.06
0.06
0.19
0.31
17
2
2
9
1
4
6
11
2
0
16
15
4
4
0
4
7
17
2
2
9
1.00
0.00
0.06
0.06
0.06
0.13
0.06
0.50
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.06
0.00
0.06
0.00
0.25
1.06
0.13
0.13
0.56
4
6
11
2
0
16
15
4
4
0
0.25
0.31
0.69
0.06
0.00
0.06
0.25
0.00
0.06
0.00
0.00
0.06
0.00
0.06
0.00
0.94
0.69
0.25
0.19
0.00
0.00
0.00
0.00
0.00
0.00
0.38
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.25
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.50
0.00
0.19
0.00
0.00
0.25
0.38
0.69
0.13
0.00
1.00
0.94
0.25
0.25
0.00
7
0.38
0.06
0.00
0.00
0.00
0.44
24
Appendix 2. (cont'd)
Sample No. of
Quads
Site No.
Code
GR-02
16
2
GR-03
2
16
HR-01
2
16
HR-02
16
2
HR-03
5
0
HR-04
2
16
HR-05
5
0
IR-01
16
2
IR-02
2
16
IR-03
2
16
IR-05
2
16
Carpenter Bay
98-10
1
16
98-11
16
1
98-12
1
16
98-14
1
16
98-15
1
16
98-17
1
16
98-18
1
16
98-19
1
16
98-20
1
16
98-21
1
16
a
JR-01
5
JR-02
3
0
JR-03
a
3
JR-04
16
2
JR-05
16
2
JR-06
16
2
KR-01
2
16
KR-02
2
16
KR-03
2
16
Kunghit Island
98-01
1
98-02
1
98-03
1
98-04
3
98-07
1
98-71
1
98-79
1
LR-01
5
LR-02
5
MR-01
5
NR-01
2
NR-02
2
OR-01
2
OR-02
2
PR-01
2
PR-02
2
PR-03
5
PR-04
2
16
16
16
0
16
16
16
0
0
0
16
16
16
16
16
16
0
16
No. of Abalone
SF
D
15
15
13
13
5
5
27
27
2
20
20
4
17
17
8
8
12
12
11
11
<70
0.00
0.00
0.00
0.31
Exposed Density by Size Group (mm
>70
>100
92-99
100-106
0.94
0.25
0.06
0.19
0.81
0.13
0.25
0.50
0.31
0.00
0.00
0.06
1.38
0.56
0.13
0.13
0.63
0.63
0.06
0.00
0.06
1.25
0.06
0.06
0.25
0.38
1.00
0.44
0.50
0.31
0.25
0.06
0.06
0.00
0.31
0.06
0.06
0.00
0.44
0.13
0.31
0.00
1.06
0.50
0.75
0.69
8
17
14
6
48
10
5
8
40
7
0.06
0.56
0.00
0.38
1.56
0.19
0.00
0.44
1.38
0.44
0.44
0.50
0.88
0.00
1.44
0.44
0.31
0.06
1.13
0.00
0.00
0.06
0.00
0.00
0.31
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.06
0.06
0.00
0.13
0.00
0.44
0.00
0.81
0.00
0.00
0.13
0.25
0.00
0.13
0.00
0.50
1.06
0.88
0.38
3.00
0.63
0.31
0.50
2.50
0.44
a
a
a
10
8
3
3
3
25
10
8
3
3
2
25
0.00
0.00
0.31
0.19
0.00
0.00
0.19
0.00
0.00
0.00
0.31
0.31
0.19
0.19
0.00
1.56
0.00
0.00
0.00
0.06
0.06
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.50
0.00
0.00
0.63
0.50
0.19
0.19
0.19
1.56
5
15
14
0
2
11
5
5
2
3
11
2
20
35
14
27
1
3
5
14
14
0
2
11
5
0.25
0.27
0.31
0.00
0.00
0.00
0.06
0.06
0.67
0.56
0.00
0.13
0.69
0.25
0.00
0.13
0.06
0.00
0.00
0.13
0.06
0.00
0.00
0.06
0.00
0.06
0.25
0.00
0.00
0.00
0.13
0.00
0.13
0.50
0.00
0.31
0.94
0.88
0.00
0.13
0.69
0.31
11
2
20
31
13
27
0.06
0.00
0.50
0.49
0.40
0.75
0.63
0.13
0.75
1.69
0.47
0.94
0.13
0.00
0.06
0.07
0.07
0.19
0.13
0.06
0.31
0.42
0.07
0.06
0.25
0.06
0.44
0.42
0.07
0.13
0.69
0.13
1.25
2.19
0.88
1.69
2
0.09
0.09
0.09
0.00
0.00
0.19
8
17
14
6
48
10
5
8
40
7
12
0
SL)
Total
0.94
0.81
0.31
1.69
I
'I
25
Appendix 3. Total exposed abalone density by site and number of quadrats sampled per site for all sample
years. Blanks indicate no samples taken. Historic index sites only
Total abalone density (number I sguare metre)
1990
1994
1998
SITE
1978
1987
1984
Cumshewa Inlet
0.06
0.00
0.00
75
1.13
0.44
0.38
0.19
76
2.88
0.13
0.06
0.00
77
1.44
0.00
78
0.75
0.06
0.00
0.88
1.50
Selwyn Inlet
65
1.06
66
0.63
67
0.94
68
1.13
69
3.88
70
3.63
Tanu Island
59
1.44
60
61
1.53
62
63
1.44
64
2.19
73
74
Upper Juan Perez
36
2.44
37
1.13
38
2.44
39
6.38
40
1.00
41
0.25
44
6.56
45
4.25
46
7.06
47
48
3.63
49
1.81
50
0.63
51
0.75
52
8.86
53
8.13
54
0.63
5.88
55
56
7.25
57
2.63
58
3.38
1978
Total number of guadrats I site
1984
1987
1990
1994
16
16
16
16
16
16
4
16
16
16
1998
16
32
32
32
32
16
16
16
0.13
0.13
0.00
0.19
0.06
0.31
0.50
0.31
0.56
1.19
0.19
0.25
0.06
0.06
0.31
0.63
0.13
0.06
0.25
0.34
0.09
0.13
0.19
0.06
0.31
0.88
0.25
0.50
0.00
0.25
16
16
16
16
16
16
16
16
8
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
32
32
32
32
32
32
16
16
16
16
16
16
0.88
1.25
0.31
0.56
0.19
0.06
1.06
0.63
0.00
0,81
0.19
0.75
1.00
0.13
0.63
0.00
0.00
0.63
0.56
0.06
0.13
0.06
0.81
0.19
0.28
0.16
0.31
0.03
0.38
0.59
0.94
1.38
0.13
0.19
1.13
0.38
0.06
0.06
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
8
8
16
16
16
16
16
64
64
32
32
32
32
32
32
16
16
16
16
16
16
16
16
0.00
0.38
0.69
0.88
0.06
0.06
0.44
0.63
4.00
0.00
0.19
0.94
0.31
0.08
0.00
0.06
0.81
1.44
0.22
0.06
0.41
0.28
0.03
0.06
0.06
0.13
0.22
0.31
0.25
1.00
0.38
0.00
0.13
0.19
0.06
0.38
16
16
16
13
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
48
16
16
16
16
32
32
32
32
32
32
32
32
32
16
16
16
16
16
16
16
16
16
0.81
0.88
0.38
0.50
0.50
0.75
1.50
2.56
1.13
0.25
0.25
0.44
2.10
0.56
0.38
0.69
0.94
0.50
1.19
1.75
0.00
0.25
0.19
0.25
0.22
0.23
0.06
0.00
0.27
0.38
0.59
0.00
0.00
0.00
0.13
0.06
0.50
0.38
0.81
16
16
16
16
16
16
16
16
16
16
16
16
48
16
16
16
16
16
16
16
16
16
48
64
32
64
32
32
64
32
32
32
32
16
16
16
16
16
16
1.00
0.25
0.06
0.38
16
16
16
16
7
16
16
16
16
16
16
8
8
16
16
16
16
16
16
16
8
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
1.56
0.81
0.63
0.69
0.52
0.27
0.38
0.44
16
16
16
16
16
16
16
16
64
64
16
16
Sound
0.00
0.00
1.00
1.81
0.13
0.06
0.13
0.75
0.50
0.00
1.19
0.56
1.19
0.00
2.00
0.31
1.00
0.88
1.75
1.00
0.06
Lower Juan Perez Sound
42
16.56
0.06
43
9.38
0.31
32
16
16
,,1
26
Appendix 3. (cont'd)
Total abalone density (number I square metre)
1990
1998
SITE
1978
1984
1987
1994
Skincuttle Inlet
0.63
0.09
1.06
22
1.63
0.06
0.00
23
1.13
0.69
0.63
0.31
0.03
0.13
24
0.75
0.81
1.13
0.38
0.25
0.13
25
2.25
0.75
0.56
26
0.56
2.00
2.13
1.25
0.34
0.06
0.06
0.06
27
0.63
0.00
0.88
0.25
28
3.06
1.13
1.13
0.31
0.19
0.38
29
0.94
0.69
0.38
0.34
0.44
0.88
0.53
0.69
30
3.31
1.25
0.25
0.13
31
1.75
0.50
0.94
0.31
32
5.75
0.00
0.50
0.13
0.09
0.00
33
3.00
0.81
0.75
0.06
1.16
1.00
34
6.13
0.94
0.44
0.19
0.25
0.94
35
0.31
0.50
0.06
0.34
0.25
0.38
1.00
72
Carpenter Bay
10
1.06
11
0.19
12
0.13
13
2.31
14
2.31
15
3.38
16
2.56
17
1.19
18
1.44
19
1.00
20
1.13
21
0.94
Kunghit
1
2
3
4
5
6
7
8
9
71
79
Island
2.63
0.69
1.63
1978
1998
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
8
16
16
16
16
8
16
16
16
0
16
16
16
16
16
32
32
48
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
32
32
32
32
32
32
32
32
28
32
16
16
16
16
16
16
16
16
16
16
8
16
12
16
16
16
16
16
16
16
8
16
16
16
16
16
16
32
32
32
16
16
16
16
16
16
16
32
32
16
16
16
16
16
15
8
16
16
16
16
8
32
32
32
32
32
16
16
16
16
16
16
16
16
16
8
16
16
16
16
16
16
16
16
16
16
16
16
32
32
32
32
16
16
16
8
16
16
32
16
16
16
32
32
16
16
0.69
0.00
0.19
0.42
0.56
0.50
0.06
0.06
0.81
0.00
1.63
0.00
0.56
0.19
0.19
0.31
0.06
0.31
0.34
0.16
0.22
0.50
1.06
0.88
0.63
0.44
1.56
0.38
0.31
0.97
0.38
3.00
0.56
0.25
0.38
0.07
0.00
0.13
0.25
0.31
0.31
0.00
0.41
0.63
0.91
0.72
0.03
0.63
0.31
0.50
2.50
0.44
16
16
16
16
16
16
16
16
16
16
16
16
1.06
0.38
0.38
0.13
0.00
0.50
0.19
0.06
0.44
1.06
1.06
0.38
0.44
1.94
1.50
0.94
0.13
0.47
0.22
1.63
0.00
0.31
0.94
0.88
16
16
16
0.00
0.13
0.19
0.16
0.13
0.19
0.31
0.19
0.03
0.69
0.31
0.31
Total number of quadrats I site
1984
1987
1990
1994
16
1
f.
27
Appendix 4. Legal and mature exposed abalone density (number I square metre) by site for all sample years.
Blanks indicate no samples taken. Historic index sites only.
Legal (>100 mm SL) abalone density
SITE 1978 1984 1987 1990 1994 1998
Cumshewa Inlet
75
0.84
0.00
0.00
0.44 0.06
76
1.44
0.06 0.13
0.44
0.00
0.06
0.00
77
78
0.75
1.50 0.69
0.03
0.00
Selwyn
65
66
67
68
69
70
Inlet
0.11
0.31
0.14
0.40
0.39
0.54
Tanu Island
0.72
59
60
61
0.40
62
63
0.21
64
1.42
73
74
0.00
0.06
0.00
0.00
0.00
0.05
0.13
0.13
0.19
0.25
0.06
0.00
0.00
0.00
0.06
0.25
0.00
0.06
0.06
0.03
0.00
0.00
0.06
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.36
0.19
0.25
0.00
0.00
0.69
0.49
0.00
0.25
0.00
0.44
0.94
0.13
0.25
0.00
0.00
0.13
0.00
0.06
0.13
0.06
0.29
0.14
0.00
0.03
0.00
0.00
0.25
0.16
0.38
0.69
0.00
0.06
0.07
0.25
0.00
0.06
Mature (> 70 mm SL) abalone density
1978 1984 1987 1990 1994 1998
1.05
2.16
0.81
0.88
0.99
1.43
0.68
2.12
Upper Juan Perez Sound
36
0.00
0.00 0.00
37
0.00
0.00 0.00
38
0.37
0.00 0.06
39
0.00
0.00 0.00
40
0.00
0.00 0.00
41
0.00
0.06 0.00
44
0.06
0.00 0.13
45
0.13
0.19 0.06
46
0.00
0.00 0.00
47
0.00
48
0.54
0.38 0.13
1.63
49
0.42 0.70
0.75 0.31
50
0.56
0.68
0.00 0.44
51
0.00 0.00
52
0.00
53
1.22 0.00 0.00
0.08 0.41
54
0.00
55
3.53 0.06 0.26
0.13 0.50
56
0.36
57
0.13
0.00 0.00
58
0.12
0.00 0.00
0.00
0.00
0.25
0.00
0.00
0.00
0.00
0.25
0.00
0.00
0.00
0.10
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.13
0.06
0.33
0.44
0.31
0.00
0.00
0.19
0.56
0.44
0.00
0.00
0.13
0.14
0.09
0.23
0.00
0.00
0.08
0.09
0.09
0.00
0.00
0.00
0.00
0.00
0.38
0.00
0.00
1.63
0.25
0.06
0.00
0.00
Lower Juan Perez Sound
42
1.25 0.00 0.13
0.94
0.00 0.00
43
0.06
0.00
0.02
0.00
0.00
0.00
0.38
3.13
1.55
1.67
0.00
0.25
1.66
11.52
0.44
0.13
0.00
1.50
0.06
0.25
0.06
0.13
0.00
0.00
0.00
0.16
0.00
0.00
0.69
0.06
0.06
0.00
0.00
0.44
0.25
0.44
0.63
0.13
0.00
0.06
0.06
0.06
0.38
0.06
0.06
0.09
0.17
0.00
0.03
0.19
0.03
0.06
0.25
0.13
0.00
0.00
0.06
0.75
1.25
0.25
0.56
0.00
0.06
1.00
0.63
0.00
0.44
0.09
0.71
1.00
0.13
0.50
0.00
0.00
0.38
0.44
0.06
0.13
0.06
0.63
0.16
0.06
0.09
0.24
0.03
0.34
0.22
0.88
1.25
0.06
0.13
0.73
0.38
0.06
0.06
0.00
0.00
0.44
0.13
0.00
0.06
0.06
0.31
0.06
0.00
0.94
0.49
1.13
0.00
0.00
0.00
0.77
0.56
1.19
0.00
0.00
0.00
0.21
0.44
0.00
0.00
0.06
0.31
0.31
0.31
0.00
0.00
0.75
0.19
0.00
0.00
0.00
0.50
0.00
0.00
0.03
0.20
0.07
0.00
0.06
0.03
0.06
0.03
0.00
0.00
0.47
0.19
0.00
0.06
0.13
0.06
0.00
0.38
0.82
0.38
0.50
0.00
0.00
1.16
2.18
1.00
0.00
0.08
0.25
1.71
0.56
0.38
0.00
0.00
0.44
0.88
1.25
0.00
0.00
0.15
0.23
0.22
0.23
0.06
0.00
0.20
0.34
0.47
0.00
0.00
0.00
0.00
0.00
0.50
0.00
0.00
0.00
0.19
0.69
0.06
0.19
0.13
0.03
0.02
0.06
0.00
0.81
0.25
0.00
0.25
28
Appendix 4. (cont'd)
Legal (>100 mm SL) abalone density
SITE 1978 1984 1987 1990 1994 1998
Skincuttle Inlet
0.00
0.00
22
0.00
0.00 0.00 0.00
0.13
0.03
0.06
23
0.11
0.28 0.21
0.04
0.00
0.40
0.07 0.19 0.00
24
0.11
0.29
25
0.00
0.25
26
0.51
0.45 0.86 0.25
0.00 0.06 0.06
0.03
27
0.16
0.00
0.00
28
0.07
0.00 0.00 0.00
0.00
0.00 0.00 0.00
0.00
0.00
29
0.00
0.00 0.00 0.00
0.00
0.00
30
0.00
0.09
0.28 0.69 0.06
0.19
31
0.00
0.00
0.00 0.00 0.00
32
0.45
0.59
0.50
33
1.10
0.31 0.38 0.00
0.00
0.00
0.19 0.06 0.00
34
0.26
0.19
0.19
35
0.03
0.31 0.13 0.00
0.88
72
Carpenter Bay
10
0.06
0.06
11
0.06
0.00
12
0.10
0.06
13
0.00
0.00
14
0.93
0.06
15
0.13
0.00
0.00
16
0.20
0.06
0.00
17
18
0.44
0.38
0.00
0.00
19
20
0.00
0.00
0.23
0.00
21
Kunghit Island
0.00
0.12
1
0.00
0.11
2
3
1.22 0.21
0.00
4
5
0.00
6
0.07
0.06
7
8
0.00
9
0.06
71
79
0.28
0.00
0.09
0.19
0.00
0.06
0.31
0.03
0.00
0.44
0.00
0.81
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.04
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.20
0.00
0.06
0.03
0.13
0.25
0.00
0.13
0.00
0.19
0.11
0.05
0.15
0.38
0.31
0.13
0.00
0.13
0.00
0.16
0.00
0.00
0.00
0.13
0.00
0.00
0.06
0.06
0.13
0.13
0.13
0.13
0.00
0.50
0.00
Mature (> 70 mm SL) abalone density
1978 1984 1987 1990 1994 1998
0.75
0.56
0.42
0.27
4.28
2.51
1.74
0.69
0.19
0.31
0.31
2.04
1.31
1.19
0.50
0.81
0.00
0.69
0.68
0.52
1.81
0.00
0.00
0.00
0.00
0.50
0.00
0.75
0.81
0.38
0.52
0.00
0.19
0.00
0.44
0.19
0.00
0.06
0.81
0.00
0.75
0.00
1.00
0.38
0.38
0.00
0.00
0.21
0.13
0.06
0.31
0.00
0.63
1.00
0.00
0.31
0.38
0.03
0.03
0.25
0.06
0.13
0.06
2.06
0.06
0.06
0.06
0.00
0.88
0.13
0.63
0.31
0.50
1.00
1.00
0.06
0.00
0.06
0.00
0.19
0.06
0.06
0.06
0.00
0.25
0.06
0.06
0.03
0.13
0.22
0.00
1.03
0.18
0.31
0.50
0.00
0.06
0.00
0.06
0.00
0.94
0.69
0.25
0.51
0.13
0.19
0.31
0.06
0.31
0.34
0.16
0.13
0.44
0.50
0.88
0.19
0.06
0.81
0.06
0.28
0.53
0.00
1.44
0.21
0.21
0.06
0.07
0.00
0.00
0.19
0.06
0.25
0.00
0.28
0.36
0.22
0.44
0.03
0.44
0.31
0.06
1.13
0.00
0.75
0.84
0.27
0.29
1.63
0.69
0.81
0.00
0.34
0.00
1.27
0.00
0.06
0.67
0.56
0.00
0.00
0.19
0.16
0.13
0.19
0.25
0.19
0.03
0.69
0.25
0.31
.j
29
Appendix 5. Pre-recruit and new recruit exposed abalone density (number I square metre) by site for all
sample years. Blanks indicate no samples taken. Historic index sites only.
Pre - recruit (92-99 mm SL) abalone density
1994
1998
SITE
1978 1984 1987 1990
Cumshewa Inlet
0.00
0.00
0.00
75
0.07
0.00
0.06
76
0.13
0.00
0.00
0.00
0.00
77
0.13
0.00
0.00
0.00
0.03
78
0.13
Selwyn Inlet
65
66
67
68
0.13
69
70
0.00
0.06
0.00
0.00
0.00
0.00
0.13
0.06
0.00
0.13
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.25
0.30
0.00
0.13
0.00
0.00
0.19
0.07
0.00
0.00
0.00
0.09
0.06
0.00
0.06
0.00
0.00
0.19
0.00
0.00
0.00
0.00
0.11
0.00
0.03
0.00
0.07
0.03
0.03
0.00
0.13
0.25
0.00
0.00
0.07
0.00
0.06
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.13
0.06
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.06
0.06
0.00
0.00
0.27
0.45
0.13
0.00
0.00
0.00
0.31
0.06
0.06
0.00
0.00
0.00
0.19
0.38
0.00
0.00
0.02
0.06
0.03
0.00
0.00
0.00
0.02
0.06
0.06
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
Lower Juan Perez Sound
2.49
0.00
0.06
42
0.06
0.00
43
0.13
0.00
0.00
0.00
0.06
0.00
Tanu Island
59
60
61
0.37
62
63
0.07
64
0.39
73
74
Upper Juan Perez Sound
36
0.00
0.00
0.00
37
0.00
38
0.00
0.00
39
0.00
40
0.00
41
0.31
0.00
44
45
0.19
0.06
0.38
0.06
46
0.00
47
48
0.24
0.31
49
0.07
50
0.19
0.00
51
0.00
0.00
52
0.00
53
0.00
0.08
54
0.06
55
0.13
56
0.00
57
0.47
0.00
58
New recruit (100-106 mm SL) abalone density
1978 1984
1987
1990
1994
1998
0.14
0.39
0.06
0.00
0.13
0.17
0.21
0.39
0.00
0.00
0.06
0.00
0.00
0.24
0.00
0.00
0.06
0.06
0.00
0.00
0.00
0.93
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.05
0.00
0.00
0.13
0.13
0.06
0.00
0.00
0.00
0.06
0.06
0.00
0.06
0.00
0.03
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.06
0.00
0.00
0.00
0.50
0.07
0.00
0.06
0.00
0.09
0.18
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.07
0.00
0.00
0.03
0.00
0.00
0.00
0.00
0.19
0.13
0.00
0.00
0.07
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.19
0.00
0.00
0.13
0.14
0.13
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.00
0.19
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.06
0.18
0.06
0.06
0.00
0.00
0.14
0.19
0.25
0.00
0.00
0.00
0.17
0.00
0.00
0.00
0.00
0.13
0.31
0.19
0.00
0.00
0.04
0.05
0.06
0.02
0.00
0.00
0.02
0.06
0.09
0.00
0.00
0.00
0.00
0.00
0.19
0.00
0.00
0.00
0.00
0.13
0.00
0.00
0.00
0.02
0.00
0.00
0.00
0.19
0.00
0.00
0.00
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