NOAA Technical Memorandum NMFS-AFSC-96

U.S. DEPARTMENT OF COMMERCE

National Oceanic and Atmospheric Administration

National Marine Fisheries Service

Alaska Fisheries Science Center

December 1998

by

B. L. Wing, M. M. Masuda, C. M. Guthrie III, and J. H. Helle

Some Size Relationships and

Genetic Variability of Atlantic Salmon

(Salmo salar) Escapees Captured in

Alaska Fisheries, 1990-95
NOAA Technical Memorandum NMFS

The National Marine Fisheries Service's Alaska Fisheries Science Center

uses the NOAA Technical Memorandum series to issue informal scientific and

technical publications when complete formal review and editorial processing

are not appropriate or feasible. Documents within this series reflect sound

professional work and may be referenced in the formal scientific and technical

literature.

The NMFS-AFSC Technical Memorandum series of the Alaska Fisheries

Science Center continues the NMFS-F/NWC series established in 1970 by the

Northwest Fisheries Center. The new NMFS-NWFSC series will be used by

the Northwest Fisheries Science Center.

This document should be cited as follows:

Wing, B. L., M. M. Masuda, C. M. Guthrie III, and J. H. Helle. 1998. 

Some size relationships and genetic variability of Atlantic salmon 

(Salmo salar) escapees captured in Alaska fisheries, 1990-95. U.S. 

Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-96, 32 p.

Reference in this document to trade names does not imply endorsement by

the National Marine Fisheries Service, NOAA.
December 1998

NOAA Technical Memorandum NMFS-AFSC-96

by

B. L. Wing, M. M. Masuda, C. M. Guthrie III, and J. H. Helle

Some Size Relationships and

Genetic Variability of Atlantic Salmon

(Salmo salar) Escapees Captured in

Alaska Fisheries, 1990-95

Auke Bay Laboratory

Alaska Fisheries Science Center

11305 Glacier Highway

Juneau, AK 99801-8626

U.S. DEPARTMENT OF COMMERCE

William M. Daley, Secretary

National Oceanic and Atmospheric Administration

D. James Baker, Under Secretary and Administrator

National Marine Fisheries Service

Rolland A. Schmitten, Assistant Administrator for Fisheries
This document is available to the public through:

National Technical Information Service

U.S. Department of Commerce

5285 Port Royal Road

Springfield, VA 22161
111

ABSTRACT

Atlantic salmon (Salmo salar) escapees from marine aquaculture facilities in British

Columbia and Washington state have been caught in Alaska fisheries each year since 1990.

Based on 82 of 89 fish retrieved from 1990 through 1995 by Alaska Department of Fish

and Game port samplers, this report provides conversion regressions for lengths and

weights, and a preliminary analysis of genetic variation for Atlantic salmon in Alaska

waters.
V

CONTENTS

. 

ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

RESULTS AND DISCUSSION ..................................... 3

Length and Weight Relationships ............................... 3

Length-Length Relationships .................................. 4

Age ................................................... 4

Genetic Variation .......................................... 5

ACKNOWLEDGMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

APPENDICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

TABLES

Table l.--Atlantic salmon recoveries in Alaska commercial fisheries by district and

year, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 2.--Statistics for prediction equations of fish weight (W) given an observed

fishlength............................................... 11

Table 3.--Sex composition of Atlantic salmon sampled in Alaska, 1990-95 . . . . . . . . 12

Table 4.--Statistics for prediction equations of nonstandard fish lengths (TL, FL,

MEHP, MEFT, ESHP, ESFT), given an observed standard fish length . . . . . . . 12

Table 5.--Statistics for prediction equations of fish lengths (ESHP, FL, MEFT,

MEHP, SL, TL), given an observed eye socket-fork length . . . . . . . . . . . . . . 13

Table 6.--Statistics for prediction equations of fish lengths (ESFT, FL, MEFT,

MEHP SL, TL), given an observed eye socket-hypural length . . . . . . . . . . . . 13

Table 7.--Statistics for prediction equations of fish lengths (ESFT, ESHP MEFT,

MEHP, SL, TL), given an observed fork length . . . . . . . . . . . . . . . . . . . . . . 14

Table 8.--Statistics for prediction equations of fish lengths (ESFT, ESHP, FL,

MEI-IP, SL, TL), given an observed eye-fork length . . . . . . . . . . . . . . . . . . . 14
vi

Table 9.--Statistics for prediction equations of fish lengths (ESFT, ESHP, FL,

MEFT, SL, TL), given an observed eye-hypural length . . . . . . . . . . . . . . . . 15

Table l0.--Statistics for prediction equations of fish lengths (ESFT, ESHP, FL,

MEFT, MEW, SL), given an observed total fish length . . . . . . . . . . . . . . . . 15

Table 11 .--Variability of protein coding loci (Shaklee et al. 1990) for enzymes and

the buffers in which they were resolved . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

FIGURES

Figure l.--Distribution of Atlantic salmon in commercial fisheries of Alaska,

1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 2.--Weight versus total length (TL) of Atlantic salmon recovered in Alaska

commercial fisheries, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 3.--Length regressions of Atlantic salmon recovered in Alaska commercial

fisheries, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

APPENDICES

Appendix I.--Collection data of Atlantic salmon recovered in Alaska commercial

fisheries, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Appendix 2.--Alaska Department of Fish and Game commercial salmon fishery

districts of southern southeastern Alaska (SSEAK) from which most

Atlantic salmon were recovered, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . 28

Appendix 3.--Left side measurements (mm) of Atlantic salmon recovered in Alaska

commercial fisheries, 1990-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
INTRODUCTION

Atlantic salmon (Salmo salar) are known to have escaped from British Columbia or

Washington state marine aquaculture facilities as early as 1987 (Burt et al. 1992;

McKinnell and Thomson 1997; McKinnell et al. 1997). Escapees were first documented

in Alaska waters in 1990 (Wing et al. 1992) and subsequently have been observed each

year in Alaska fisheries (McKinnell and Thomson 1997; McKinnell et al. 1995, 1997).

Most of these fish have been caught in gill-net and purse seine fisheries of southern

southeastern Alaska, but some have been observed in the sports fishery in the Ketchikan

and Sitka areas, in the troll fishery of northern southeastern Alaska, and in the set gill-net

fishery near the Shumagin Islands in the western Gulf of Alaska. Recently, an Atlantic

salmon was caught near the Pribilof Islands in the eastern Bering Sea (Brodeur and Busby

1998). The continued presence of these fish in Alaska waters poses questions about their

growth, survival, and interactions with native salmonids in the marine environment as well

as the potential for their invasion into freshwater spawning grounds. From 1990 through

1995, 89 Atlantic salmon were identified in commercial salmon landings in Alaska. This

report provides length-weight regressions, length conversion regressions, and preliminary

allozyme analyses for 15 protein-coding loci.

IDENTIFICATION

Atlantic salmon and the European and Eurasian trouts (Salmo spp.) are currently

recognized as generically separate from the Pacific salmonids (Oncorhynchus spp.) (Smith

and Stearley 1989; Robins et al. 1991a,b). Morphological and meristic characters useful

for separating the two genera are not easily discerned in the field. Distinction between

immature marine specimens of Salmo and Uncorhynchus is complicated because most

species develop a predominately metallic blue to blue-green dorsal coloring, with silvery

sides and belly. The distinctive parr marks, melanistic pigment spots, and areas of red,

orange, or pink are often faded or absent. Distinguishing marine-caught Atlantic salmon

from similar-appearing Pacific salmon and trout is possible by careful observation of the

combined coloration, morphology, and fin ray counts, although no single characteristic is

completely reliable. The large black pigment spots on the operculum are an easily

observed field characteristic separating Atlantic salmon from most of the Pacific salmon.

Atlantic salmon have fewer black pigment spots dorsally than chinook (0. tshawytscha),

coho (0. kisutch), and pink salmon (0. gorbuscha), and these spots tend to be X-shaped,

in contrast to the rounded or irregular spots of most Pacific salmon. The low anal fin ray

count (8-12) separates Atlantic salmon from all of the anadromous Oncorhynchus species

except steelhead (0. mykiss) and cutthroat trout (0. clarki). Also, Atlantic salmon have a

narrow caudal peduncle (peduncle depth:standard length ratio of 12 to 15), which

distinguishes Atlantic salmon from most of the Pacific salmon except chum salmon (0.

keta); chum salmon, however, have higher anal fin ray counts (13 to 17) than Atlantic

salmon and usually lack black pigmentation spots.
2

METHODS

Specimens of Atlantic salmon in gill-net, purse seine, and troll fishery catches

delivered to fish processors in southeastern Alaska, 1991-95, were labeled and frozen by

Alaska Department of Fish and Game port samplers. One specimen was received from the

Shumagin Islands set-net fishery. The frozen salmon were shipped to the Auke Bay

Laboratory and held frozen at -20°C until they were thawed for length and weight

measurement, scale sampling, and tissue sampling for electrophoretic analysis of

genetically variable enzymes. Following dissection, the thawed fish were air freighted to

Seattle, Washington, where Andrew J. Thomson, Canadian Department of Fisheries and

Oceans, sampled further for stomach contents, maturity stage, and relative fat condition.

Because various fishery agencies use different fish body measurements, multiple

measurements were taken on each fish for comparisons and conversions (taxonomists,

fishery managers, fish culturists, fish processors, commercial fishermen, and sports

fishermen all use different sets of measurements, as well). Left-side body measurements

(in millimeters) were obtained for the following:

Total Length (TL) = Tip of snout to end of tail.

Fork Length (FL) = Tip of snout to fork of tail.

Standard Length (SL) = Tip of snout to end of hypural plate.

Eye-Hypural (MEHP) = Mid-eye to end of hypural plate.

Eye-Fork (MEFT) = Mid-eye to fork of tail.

Eye Socket-Hypural (ESHP) = Posterior edge of eye socket to end of hypural plate.

Eye Socket-Fork (ESFT) = Posterior edge of eye socket to fork of tail.

Preanal length (PL) = Tip of snout to anus.

Head length (HL) = Tip of snout to posterior of opercle.

Head width (HW) = Widest dimension of the head.

Interorbital width (IOW) = Dorsal head width between orbits.

Orbit diameter (OD) = Horizontal diameter of the orbit.

Caudal peduncle depth (CD) = Narrowest depth of the caudal peduncle.

Body depth (BD) = Body depth at front of dorsal fin.

Girth (G) = Girth at front of dorsal fin.

Weight (WT) = Whole weight (undressed) recorded to 0.1 kg.

Also scales (two to five per fish) were taken from the fifth scale row above the

lateral line and behind the dorsal fin on the left side.

Protein electrophoresis was also used to confirm the species identification using the

diagnostic loci PGDH* and LDH* as described in Wing et al. (1992). Eye, heart, liver,

and dorsal muscle tissues were extracted from 80 of the fish for electrophoretic isozyme

analyses following the techniques of Aebersold et al. (1987). Genetic comparisons were

made with standards from Atlantic salmon and six Pacific sahnonids (steelhead and

sockeye [O. nerkzz], pink, chum, chinook, and coho salmon).
RESULTS AND DISCUSSION

Eighty-nine Atlantic salmon were positively identified in Alaska fisheries from

1990 through 1995 (Table l), but only 82 were available for complete observation (three

1995 fish were not shipped from Ketchikan to Juneau, three 1995 fish were retained by

the fishing vessels for personal consumption, and one 1991 fish was lost). All 82

examined fish had deformed or missing fins, indicative of net-pen rearing. Their lengths

ranged from 319 to 752 mm (SL) and weights ranged from 0.5 to 6.0 kg.

Of the 82 fish examined, 52 fish were taken in purse seine fisheries, 24 in gill-net

fisheries, 3 by commercial trollers, and 3 by unspecified commercial fishermen (Table 1).

One fish, taken in 1994 in the set gill-net fishery at Nagai Island of the Shumagin Islands,

was the westernmost occurrence of Atlantic salmon in the Pacific Ocean. Subsequently, in

1997 an Atlantic salmon was caught in the Pribilof Islands area in the eastern Bering Sea

(Brodeur and Busby 1998). All the Atlantic salmon in this study were from southern

southeastern Alaska, except the fish from the Shumagin Islands and two fish from the troll

fisheries (Fig. 1). Verbal reports from charter boat operators, sports fishermen, and Alaska

Department of Fish and Game personnel were received that Atlantic salmon occurred in

sport catches near Ketchikan and Sitka, but not enough information was available to allow

us to confirm these reports.

Length and Weight Relationships

The sample of fish sizes were collected over several years from fish caught in

different fisheries with several types of gear. Sampled fish likely consisted of different

ages. Gender information was not available for 15 of the fish; therefore, the sex

composition could affect length-weight regressions. The data do not apply to a welldefined population, but a non-random sample can be useful in length-weight predictions if

the central trend of the sample is similar to that of the intended population (Picker 1984),

in this case West Coast Atlantic salmon. The central trend of a sample is reflected by a

fitted geometric mean regression line, which can be used for prediction.

Sometimes the length but not weight of a fish is available. Weight information,

however, may be desirable. All is not lost if good prior information about the lengthweight relationship is available. Length-weight relationships are commonly described by

regression equations. If such a regression equation exists, then the fitted equation can be

used to predict a fish’s unobserved weight, given its length. The observed length, for

which a prediction of weight is desired, and the lengths used in the regression are assumed

to come from the same population.

The geometric mean (GM) regression model (Picker 1973, 1984) was fit for

prediction of fish weight (w) given length. GM regression was used instead of ordinary

linear regression (OL) because GM regression is recommended for situations where both

variables, weight and length, are subject to natural variability (Picker 1973). The GM

regression line is close to the OL regression line in situations where the variates have high

correlation. Weight was highly correlated (r > 0.91) with each of eight length

measurements (TL, FL, SL, MEHP, MEFT, ESHP, ESFT, and PL). When both the GM
4

regression and the OL regression lines were fit for In (W) on ln (TL), the estimated GM

intercept and slope fell within the 90% confidence region for the estimated OL intercept

and slope; that is, the coefficients estimated from the two methods were not significantly

different at the 0.1 level of probability. Length and weight were log-transformed for all

regressions. The log-log transformation improved the linearity between the two variables

and is commonly used for positive variates. Assumptions of linearity, normality of data,

and homogeneity of variance seem to be met for all regressions. Given the regression

coefficients estimated from the GM regressions, prediction equations for fish weight (w)

are provided for the above-mentioned length measurements that may be taken on a fish

(Table 2, Fig. 2).

Sex ratios did not differ significantly from 1 :l over the 6-year period (Table 3).

McKinnell et al. (1997) reported a predominance of males (13 males:0 females) in the

1995 Alaska catch. Their data did not include’ an additional five Alaska fish: one was a

female, and the sex of four was not determined (Table 3). The unsexed fish included

specimens not sent to ABL and fish examined but whose sex could not be determined

because the fish had been dressed before delivery. McKinnell and Thomson (1997) did

not find an unbalanced sex ratio for either Alaska samples or combined Alaska-British

Columbia samples from 1992 through 1996.

Length-Length Relationships

Choice of length measurement is not standardized among agencies, making

comparison of length measurements taken from several agencies problematic. Similar to

prediction of fish weight given fish length, prediction of a fish length can be made from a

different length measurement.

GM regression models of fish lengths were fit to predict a fish length given a

different length measurement. GM regression was used instead of OL regression because

both independent and dependent variables are subject to natural variability. All length

variables were highly correlated with each other (r > 0.96); therefore, GM regression lines

are very close to OL regression lines. Assumptions of linearity, normality of data, and

homogeneity of variance seem to be met for all length regressions. Given the regression

coefficients estimated from the GM regressions, prediction equations for lengths given

other lengths are provided (Tables 4-10, Fig. 3).

Age

Marine annuli were present on scales from 82 of the collected Atlantic salmon, and

some showed considerable marine growth beyond the last annulus. Without a comparative

baseline of scales from fish reared in marine pens, interpretation of the growth on the

scales of these escapees would be highly speculative. Therefore, ageing of the fish was

not attempted.
5

Genetic Variation

Seven enzyme-specific stains were used to assay tissues from 80 of the collected

Atlantic salmon for 15 protein coding loci (Table 11). The isolocus sMDHB-1,2* was

polymorphic with the respective allelic frequencies. *l00 0.950, *fast 0.044, *slow 0.006.

The variation was assigned to one locus, which is a conservative treatment for isoloci with

relatively low allelic variability (Gharrett and Thomason 1987). The other 11 loci and 2

isoloci were monomorphic. This variation may prove useful for identifying sources of

Atlantic salmon caught in Alaska fisheries.

ACKNOWLEDGMENTS

We thank J. Koemer and Glen Oliver of the Alaska Department of Fish and Game

and their staff for collecting the Atlantic salmon and shipping them to Auke Bay. Dr.

Richard Wilmot prepared the distribution and fishing-district maps.
6

CITATIONS

Aebersold, P. B., G. A. Winans, D. J. Teel, G. B. Milner, and F. M. Utter. 1987. Manual

for starch gel electrophoresis: A method for the detection of genetic variation.

U.S. Dep. Commer., NOAA Tech. Rep. NMFS 61, 19 p.

Brodeur, R. D., and M. S. Busby. 1998. Occurrence of an Atlantic salmon, Salmo salar,

in the Bering Sea. Alaska Fish. Res. Bull. 5:64-66.

Burt, D. W., C. Groot, E. Black, and A. J. Thomson. 1992. Presence of cultured Atlantic

salmon in British Columbia rivers in 1990 and 1991. Unpublished report to the

B.C. Ministry of Agriculture, Fisheries and Food, Aquaculture and Commercial

Fisheries Branch, 808 Douglas St., Victoria, V8W 227, 30 p.

Gharrett, A. J., and M. A. Thomason. 1987. Genetic changes in pink salmon

(Oncorhynchus gorbuscha) following their introduction into the Great Lakes. Can.

J. Fish. Aquat. Sci. 44:787-792.

McKinnell, S., and A. J. Thomson. 1997. Recent events concerning Atlantic salmon

escapees in the Pacific. ICES J. Mar. Sci. 54:1221-1225.

McKinnell, S., A. J. Thomson, E. A. Black, B. L. Wing, C. M. Guthrie III, J. F. Koemer,

and J. H. Helle. 1995. Recoveries of Atlantic salmon in the northeastern Pacific.

(NPAFC Doc. No. 157). Dep. of Fish. and Oceans, Ocean Science and

Productivity Div., Pacific Biological Station, Nanaimo, B.C. Canada, V9R 5K6,

15 p.

McKinnell, S., A. J. Thomson, E. A. Black, B. L. Wing, C. M. Guthrie III, J. F. Koemer,

and J. H. Helle. 1997. Atlantic salmon in the North Pacific. Aquaculture Res.

28:145-157.

NC-IUBMB (Nomenclature Committee of the International Union of Biochemistry and

Molecular Biology). 1992. Enzyme nomenclature 1992. Academic Press, San

Diego, 862 p.

Ricker, W. E. 1973. Linear regressions in fishery research. J. Fish. Res. Board Can.

30:409434.

Ricker, W. E. 1984. Computation and uses of central trend lines. Can. J. Zool.

62: 1897-1905

Ridgway, G. J., S. W. Sherburne, and R. D. Lewis. 1970. Polymorphism in the esterases

of Atlantic herring. Trans. Am. Fish. Soc. 99:147-15 1.

Robins, C. R., R. M. Bailey, C. E. Bond, J. R. Brooker, E. A. Lachner, R. N. Lea, and W.

B. Scott. 1991a. Common and scientific names of fishes from the United States

and Canada, 5th ed. Am. Fish. Soc. Spec. Publ. 20, 183 p.

Robins, C. R., R. M. Bailey, C. E. Bond, J. R. Brooker, E. A. Lachner, R. N. Lea, and W.

B. Scott. 1991b. World fishes important to North Americans, exclusive of species

from the continental waters of the United States and Canada. Am. Fish. Soc. Spec.

Publ. 21, 243 p.

Shaklee, J. B., F. W. Allendorf, D. C. Morizot, and G. S. Whitt. 1990. Gene

nomenclature for protein-coding loci in fish. Trans. Am. Fish. Soc. 119:2-15.

Smith, G. R., and R. F. Stearley. 1989. The classification and scientific names of

rainbow and cutthroat trout. Fisheries (Bethesda) 14(1):4-l 0.
7

Thomson, A. J., and S. McKinnell. 1994. Summary of reported Atlantic salmon (Salmo

salar) catches and sightings in British Columbia and adjacent waters in 1993. Can.

Manuscr. Rep. Fish. Aquat. Sci. 2246, 35 p.

Wing, B. L., C. M. Guthrie III, and A. J. Gharrett. 1992. Atlantic salmon in marine

waters of southeastern Alaska. Trans. Am. Fish. Soc. 121:8 14-8 18.
TABLES
11

Table l.--Atlantic salmon recoveries in Alaska commercial fisheries by district and year,

1990-95.

Atlantic Salmon Recovered

a

 Southern southeastern Alaska, district not specified.

Table 2.--Statistics for prediction equations of fish weight (W) given an observed fish

length. Coefficients were estimated from the functional regression model of

In(W) given log-transformed fish length.
12

Table 3.--Sex composition of Atlantic salmon sampled in Alaska,

1990-95.

Year Male Female unknown Total

1990 0 1 1

1991 4 1 2 7

1992 1 1 2

1993 11 13 4 28

1994 10 13 4 27

1995 13 1 10 24

Table 4.--Statistics for prediction equations of nonstandard fish lengths (TL, FL, MEHP,

MEFT, ESHP, ESFT), given an observed standard fish length (SL).
13

Table 5.--Statistics for prediction equations of fish lengths (ESHP, FL, MEFT, MEHP, SL,

TL), given an observed eye socket-fork length (ESFT).
14

Table 7.--Statistics for prediction equations of fish lengths (ESFT, ESHP, MEFT, MEW,

SL, TL), given an observed fork length (FL).
15
Table 11 .--Variability of protein coding loci (Shaklee et al. 1990) for enzymes and the buffers in which they were resolved. EC

numbers are in accordance with NC-IUBMB (1992). L = liver, H = heart, M = muscle, E = eye.

Enzyme EC Number Locus Tissue Buffer”

Variability

Levelb
FIGURES
Figure 1 .--Distribution of Atlantic salmon in commercial fisheries of Alaska, 1990-95.

Numbers in black circles represent the number of fish caught.
20

Figure 2.--Weight versus total length (TL) of Atlantic salmon recovered in Alaska

commercial fisheries, 1990-95.
21

Figure 3.--Length regressions of Atlantic salmon recovered in Alaska commercial fisheries,

1990-95. Lengths: ESFT = eye socket-fork, ESHP = eye socket-hypural,

FL = fork length, MEFT = eye-fork, MFNP = eye-hypural, SL = standard length,

TL = total length.
2 2
APPENDICES
25

Appendix l.--Collection data of Atlantic salmon recovered in Alaska commercial fisheries,

1990-95.

Total Whole Gonad

Gear Length Weight Weight Fat

No. Date” Type DistrictbSexC

(mm) (kg) (g) Coded

 Feed”
26

Appendix 1 .--Continued.

Gear

No. Date” Type Districtb

Total Whole Gonad

Length Weight Weight Fat

Sexc

(mm) (kg) (g) Coded

 Feed
27

Appendix 1 .--Continued.

Total Whole Gonad

Gear Length Weight Weight Fat

No. Date” Type Districtb

Sex” (mm) (kg) (g) Coded

 Feed”
28

Appendix 2.--Alaska Department of Fish and Game commercial salmon fishery districts of

southern southeastern Alaska (SSEAK) from which most Atlantic salmon

were recovered, 1990-95.
Appendix 3.--Left side measurements (mm) of Atlantic salmon recovered in Alaska commercial fisheries, 1990-95. Column headings defined

on p. 2.



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WILKINS, M. E., M. ZIMMERMANN, and K. L. WEINBERG. 1998. The 1995 Pacific west coast bottom

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