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BRISTOL BAY DATA REPORT NO. 92

Nushagak Sonar Enumeration Project, 1982

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By

R. Eric ~1inard ResearchBiologfst

Division of Commercial Fisheries

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TABLE OF CONTENTS

· Page(s)

List of Figures ............................................... . i

List of Tab 1 es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i i

Introduction .................................................. .

Methods and ~1ateri a 1 s ......................................... .

Sonaor Units ..........................•.................... Ca 1 i brati on .............................................. . Sector Distribution ...................................... . Species Apportionment .................................... . AWL Sampling .........................•.....•.............. Climatological Data ...................................... .

Results ....................................................... .

Sonar Counts ............................................. . Sector Di stri but ion ...................................... . Species Apportionment ................... , .........•....... Daily Escapement Estimates ............................... . AWL Sampling ............................................. . Climatological Data ...................................... .

Discussion .....................•................•..............

Literature Cited ........................••.....................

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LIST 0 F FIGURES

J J Figure 1. Location of Nushagak Sonar enumeration project

Nushagak River, Bristol Bay, Alaska.................... 2

J Figure 2. Nushagak River bottom profile at sonar site, 1982...... 3

Figure 3. Nushagak River sonar count distribution, June 14 -

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August 18, 1982.... .. .. .. . . . . .. .. . .. . ... .. .... .. . . . . . . . 8

Nushagak River sonar count distribution over time and

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sector in three day time periods , 1982. . . . . . . . . . . . . . . . . 9

Nushagak River daily escapement estimates by species, 1982.. ... . . . .. . . . . . . . .. ... . .. ....... ... ..... .. .. . ... .. . 17

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LIST OF TABLES

Table 1. Nushagak River escapement by species, 1982 ............... .

Table 2. Number of spawners per index point by species, 1982 ...... .

Table 3. Nushagak sonar drift net CPUE (fish per drift) by day and species, 1982 .............................•...........

Table 4. Nushagak River daily escapement, by species, estimated from gill net CPUE data and sonar counts collected ·at Nushagak Sonar, 1982 .................................. .

Table 5. Nushagak River run timing, by species, estimated by in-season sonar estimates, post-season estimates and commercial catch data, 1982 ........... : .............. .

Appendix Table 1. 1982 north bank of Nushagak River side scan sonar counts by sector .............. ; ........... .

Appendix Table 2. 1982 south bank of Nushagak River side scan sonar counts by sector .......................... .

Appendix Table 3. 1982 north bank of Nushagak River side scan sonar counts by hour ............................ .

Appendix Table 4. 1982 s'outh bank of Nushagak River side scan sonar counts by hour .....•.......................

Appendix Table 5. Nushagak River sockeye salmon escapement.age, weight, length and sex summaries, 1982 ...•.......

Appendix Table 6. Nushagak River chum salmon escapement.age, weight, length and sex summaries, 1982 .......... .

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INTRODUCTION

This report presents results of the 1982 side-scan sonar enumeration project conducted on the Nushagak River in Bristol Bay .. The objective

of this research is to obtain accurate estimates of salmon escapement

into the Nushagak River system soon after the fish have passed through

the commercial fishery. The feasibility of enumerating the five species

of adult salmon returning to the Nushagak was first examined using a single

side scan sonar counter in 1979. Because of .the programs apparent .success

it was expanded to include a second counter in 1980 (McBride eta] 1980).

Since then this program has been run annually with only slight variation in

site location and methodology between years.

The sonar gear and field camp is located near the village of Portage Creek

some 40.2 km (25 miles) from the terminus of the Nushagak commercial fishing

district (Figure 1). The single river channel, approximately 335m in width,

flows at between 1.22 m/sec. and 2.l3in/sec. Maximum depth is approximately

4.6 m in mid-channel. Water depth at 60 ft. offshore of .. the north and south

banks is about 2 meters and 3 meters, respectively (Figure 2).

METHODS AND MATERIALS

Sonar Units

The north and south bank sonar units were installed. on 9 June 1982. The

north bank counter (Serial #7820008) was installed approximately 300 meters

up-stream from the site used in 1981 to take advantage of swifter river

velocity. The south bank counter (Serial #7820002) was installed in the

same location as it has been since 1980. Both units monitored the salmon

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i Location of Nushagak sonar enumeration project Nushagak River, Bristol Bay, Alaska.

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Wood River

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Miles

Nuyakuk Tower

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Bristol Bay

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North Bank

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-.------------~------- 335 meters ,......._,

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Figure 2. Nushagak River· bottpm profile at sonar s1te,:l982.

' .. ·- .... . . . . 240

:#.··-·" . . . . . . . .:: 280

•'· .. ' 320

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South Bank

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run, recording counts on an hourly basis, until their removal on August 18.

Seasonal ADF&G personnel continually monitored the counters throughout the

season enabling rapid detection of problems (i.e. debris caught on sub­

strate, mis-aimed transducers, under/over counting). The transducers in

both systems were aimed using an oscilloscope under the direction of Al

Menin (Bendix hydroacoustics) immediately following their installation and

then periodically during the season.

Calibration

Each counter was calibrated hourly, with the exception of the early morning

hours, for each day of operation. Calibration consisted of a ten minute

interval where counts produced by the machine were compared with those made

by trained technicians observing an oscilloscope pattern and hand tallying

observed counts. At the end of the interval the machine count was divided

into the oscilloscope·count to yield a percent agreement between the two.

If the percent agreement was consistently less than 80% or greater than 120%

indicating poor accurac~, an adjustment to the fish swimming velocity setting

on the machine was made. The calculated percent agreement was applied to the

corresponding hourly count for all sectors producing an adjusted hourly count.

Adjusted hourly counts were summed for all hours and apportioned by species to

provide rough in-season estimates of fish passage on a daily basis. This

calibration technique proved to be an effective method of measuring machine

accuracy·and adjusting counts.

Sector Distribution

Distribution of counts across the substrate is a good indication of the

performance of the sonar gear. Sector distribution for the north and south

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bank counters was calculated post-seasonally. This was accomplished by

determining the proportional contribution made by each sector for hours

having a high percent agreement (90% or better) between the machine and

oscilloscope and applying that number to the adjusted daily total. More

specifically the working formula was:

Where:

E sJ. X Nb = nb i = 1

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= sum of i raw counts in sector j with percent agreement of 90% or better.

S = sum of all unadjusted totals with percent of 90% or better.

Nb= adjusted daily total for day b.

nb= estimated sector total for day b.

This procedure insured that for hours in which many false counts occurred,

causing a low percent agreement, sector distribution was not artificially

distorted.

Species Apportionment

In-season, adjusted sonar counts were apportioned by species based on 10

[] fathom drift gill net catches collected several times each day. King (8! in.),

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red (5-3/8 in.) and pink (4! in.) gear were generally fished with equal

effort. The total catch for all gear types was combined at the end of each

day and the percent contribution by species was calculated. Percentages were

applied to the adjusted daily count to yield an estimate of daily escapement

by species.

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Post-seasonally the total adjusted sonar count was apportioned based upon

percent contribution of each species to the combined aerial survey and tower

estimates (Bucher 1982). To arrive at estimates of daily escapement by

species, drift net data collected at the sonar site was examined in terms

of daily catch per unit of effort (CPUE). A daily CPUE (fish per drift)

for each species was calculated by combining catches for all gear types

fished on a given day, and dividing by the total number of drifts made that

day. The result was a daily abundance index, in fish per drift, by species.

An estimate of spawners per gill net index point was derived by dividing the

total number of sonar counts apportioned to a specie by that spectes

accumulative gill net index. Daily escapement estimates for each species

were calculated by multiplying the daily gill net index by the appropriate

number of spawners per gill net index point.

AWL Sampling

Sockeye and chum salmon were captured using a beach seine and sampled for

standard age, sex, and length data. Age was determined from scale samples,

length (mid-eye to fork tail) was recorded to the nearest millimeter, and

sex was determined visually.

Climatological Data

Weather data were collected twice daily at Portage Creek. Precipitation was

measured using aTay'lor Clear View rain gauge, wind direction and velocity

were estimated, air andwater.temperatures were measured to the nearest

degree. Water level was measured at the sonar site by means of a staff

. gauge to the nearest inch.

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RESULTS

Sonar Counts

A total of 2,539,002 adjusted counts were recorded by the two sonar units

(Appendix Tables 1 and 2) located at Portage Creek. The north bank contributed

1,709,837 counts, or 67 percent, while the south bank contributed 829,165

counts for the remaining 33 percent of the total. The distribution of.

counts between the north and south banks is opposite from prior years

(McBride et al 1980; McBride et al 1981) but not unprecedented. Nelson

(personal communications) pointed out that bank preference on the Wood

River is known to change from year to year depending on.the timing of peak

migration and the influence high tides have upon fi.sh passage.

Sector Distribution

The distribution of counts along the north bank substrate was, for the fourth ..

year, markedly bimodal (Figure 3). With 27 percent of the north bank counts

occurring in the last three .sectors, it is presumed that some fish were missed

going around the substrate. On the south bank however, the distribution was

more inshore. Only 8 percent of .the south bank counts occurred over the last

three sectors. It is suspected that the slower river velocities and gentle

slope of the north bank attributes to the offshore distribution. North bank

sector dis.tribution showed a marked shift inward on aoout the 9th of July

(Figure 4), which was coincident with the decline of.the red salmon run and

the start of the pink run. Presumably the reds are stronger swimmers and can

maintain themselves in the $Wift currents fo.und offshore. The south bank

demonstrated fairly consistent inshore distribution throughout the season.

Sonar counts by hour are presented for each sonar unit in Appendix Tables 3

and 4. The percent of sonar counts by hour for the entire season are relatively

consistent between units and show a significant decrease d-uring the hours of

darkness (Figure 3, lower half).

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NUSHAGAK RIVER SONAR COUNT DISTRIBUTION JUNE 1~ - AUGUST 18, 1982

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---- NORTH BANK ------------ SOUTH BANK

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--- NORTH BANK ------------ SOUTH BANK

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' Figure 3. Nushagak River sonar count distribution, June 14-August 18, 1982. I . .

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Figure 4 .. Nushagak River sonar count distribution over time and sector in three day time periods, 1982.

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Species Apportionment

In-season estimates, summarized in Table 1, of species composition were

provided daily to fishery managers. Although these estimates were preliminary

they provided indispensable data with which to manage the fishery.

Post-seasonal estimates of species abundance (Table 1) tallied 124,939 king

salmon, 537,682 red salmon, 230,139 chum salmon, 227,237 coho salmon and

1,424,732 pink salmon. A comparison between the post-season estimates with

those made from combined aerial survey and tower counts (Table 1) shows them

to be very similar, indicating that they are probably more representative of

the actual escapement totals than were the in-season estimates.

Daily Escapement Estimates

The number of spawners per gill net index- point was calculated for each species

by dividing the total sonar counts apportioned to a species by the accumulative

gill net index for that species (Table 2): The calculations yielded 5,142 king, •

17,983 red, 6,538 chum, 15,149 coho and 31,661 pink spawners per gill net index

point. Daily escapement estimates by species were derived from the spawner

per gill net index point relationships and daily drift gill net CPUE data

(Table 3). Table 4 presents daily escapement estimates for the five species

returning to the Nushagak River in 1982.

AWL Sampling

Of the·l,360 samples collected at Nushagak Sonar, 633 were sockeye and 727

were chum. Preliminary analysis indicated that the sockeye were composed

of primarily age 52 fish, 60 percent of which were males and 40percent.

females. Average length of the males and females was·;587.1 mm· and 562.2 mm,

respectively (Appendix Table 5). Chum salmon statistics are presented in

Appendix Table 6.

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Table 1. Nushagak River Escapement by Species, 1982.

Estimated Escaeement King Red Chum Coho Pink Total

Inseason Estimate 355,460 507,800 634,750 228,509 812,483 2,539,002

Post-Season Estimate 124,939 537,682 230,139 227,237 1 ,424,732 2,544,733

Combined Aerial Survey Tower Estimate 147,000 601 ,000 256,000 229,676 1 ,611 ,230 2,844,906

Percent Agreement Between Combined Aerial Survey Tower Estimate .85 .90 .90 .99 .88 .89 and Post-Season Sonar Estimates

NOTE: The difference between totals for both sonar estimates is due to rounding error and post-seasonal extrapolation of sonar counts based on drift net CPUE data.

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Table 2. Number of spawners per index point by species, 1982.

Accumulative Spawners Per SEecies EscaEement Index Index Point

King 124,939 24.3 5,142

Red 537,682 29.9 17,983

Chum 230,139 35.2 6,538

Coho 227,237 15.0 15 '149

Pink 1,424,732 45.0 31 ,661

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J Table 3. Nushagak Sonar Drift Net CPUE (Fish Per Drift) by Date and Species, 1982.

J King Red Chum Coho Pink Date Daily Accum. Daily Ace urn. Daily Accum. Daily Accum. Daily Accum.

June 21 1.5 1.5 0 0 .6 .6 22 1.1 2.6 .4 .4 .6 1.2

J 23 1.3 4.·0 1.3 1.6 .3 1.4 24 3.3 7.3 2.2 3.8 1.2 2.6 25 0.8 9.8 .4 4.2 .8 3.4 26 0.5 10.3 0 4.2 2.2 5.6

J 27 .3 10.6 .5 4.7 1.9 7.5 28 .3 10.9 1.2 5.9 1.6 9.2 29 .6 11.5 .8 6.7 .3 9.4 30 1.0 12.5 .9 7.6 1.2 10.6

J July 1 1.1 13.6 2.3 9.8 1.5 12.1 2 1.1 14.6 2.1 11.9 1.1 13.2 3 1.0 15.6 2.0 13.9 3.3 16.5 4 .2 15.8 1.8 15.7 1.0 17.5 5 .8 16.6 1.7 17.4 .8 18.3

J 6 .8 17.4 2.1 19.5 .4 18.7 7 .7 18.1 1.3 20.7 .6 19.3 8 .3 18.4 1.4 22.2 1.4 20.7 9 .4 18.9 .3 22.5 .6 21.3

J 10 .6 19.5 .4 22.9 1.1 22.5 11 .3 19.8 .8 23.7 1.3 23.8 12 .5 20.3 .5 24.2 1.3 25.0 13 .4 20.7 .7 24.9 1.4 26.5 ' . 1 • 1

J 14 .4 21.1 .3 25.2 .4 26.9 . 1 .2 15 .9 22.0 .3 25.5 .4 27.4 . 1 .3 16 .3 22.2 .4 26.0 .4 27.7 . 1 .3 17 .4 22.7 .6 26.6 .6 28.4 . 1 • 1 .4 .7

] 18 .4 23.0 .4 27.0 1.1 29.4 • 1 .2 .3 1.0 19 . 1 23.1 .9 27.9 .9 30.3 0 .2 .4 1.4 20 .2 23.3 .3 28.2 1.3 31.6 0 .2 .6 1.9 21 . 1 23.4 .4 28.6 .4 32.0 • 1 .3 .6 2.5

J 22 .3 23.7 .3 28.9 .3 32.3 .2 .4 1.1 3.6 23 • 1 23.7 .4 29.3 .2 32.5 .3 . 7 .5 4.1 24 .2 23.9 .4 29.7 .4 32.9 .8 1.4 1.9 6.0 25 0 23.9 . 1 29.8 .4 33.2 .4 1.8 .8 6.8

J 26 .4 24.3 . 1 29.9 .4 33.6 .5 2.3 6.1 12.g 27 0 24.3 0 29.9 .4 34.0 0 2.3 2.9 15.9 28 0 24.3 0 29.9 .3 34.3 .7 3.0 3.4 19.3 29 0 24.3 0 29.9 . 1 34.4 .6 3.5 3.4 22.7

J 30 • 1 34.5 .4 4.0 4.6 27.2

31 • 1 34.7 .3 4.2 5.4 32.6 Aug. 1 0 34.7 .2 4.4 3.7 36.3

2 .5 35.2 .5 4.9 2. 1 38.4 3 0 35.2 0 4.9 1. 7 40.1 'l 4 0 35.2 0 4.9 1. 2 41.3

~ 5 0 35.2 • 1 5.0 .3 41.5 6 .4 5.4 .9 42.5 7 . 1 5.5 • 1 42.5 ,-1 8 . 1 5.5 .3 42.8 9 .4 6.0 .4 43.2 ,_

10 .a 6.7 1.1 44.3 11 3.8 10.5 .6 45.0

J 12 1.5 12.0 0 45.0 13 1.0 13.0 0 45.0 14 0 13.0 0 45.0 15 2.0 15.0

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J Table 4. Nushagak River daily escapement, by species, estimated from gill net CPUE data and sonar counts

cc~lected at Nushagak Sonar, 1982

J Estimated Esca ement King Red Chum Coho Pink Total

Date Daily Accum. Daily Accum. Daily Accum. Daily Accurn. Daily Accum. Dally Accum.

J June 14 281 281 120 120 100 100 501 501 15 589 870 252 372 210 310 1 ,051 1 ,552 16 557 1 ,427 239 611 199 509 995 2,547 17 1 .432 2,859 614 1,225 512 1 ,021 2,558 5,105 18 1,583 4,442 678 1 ,903 565 1,586 2,826 7,931

J 19 1.123 5,565 481 2,384 401 1 ,987 2,005 9,936 20 790 6,355 338 2~722 282 2,269 1 glQ ] ] Jg6 21 7,836 14,191 0 2,722 3,895 6,164 11.731 23,077 22 5,746 19,937 7,133 9,855 3,895 10,059 16,774 39,851 23 6,791 26,728 23,182 33,037 1 ,948 12,007 31,921 71 ,772 24 17,239 43,967 39,230 72,267 7,790 19,797 64,259 136,031

J 25 4,179 48,146 7,133 79,400 5,194 24,991 16 ~Qfi ] 52 53Z 26 2,612 50,758 0 79,400 14,282 39,273 16,894 169,431 27 1 ,567 52,325 8,916 88,316 12,335 51 ,608 22,818 192,249 28 1,567 53,892 21,398 109,714 10,387 61 ,996 33,352 225,601 29 3,134 57,027 14,266 123,980 1 ,948 63,944 19,348 244,949

J 30 5,224 62 ,251 16,049 140,029 7,790 71,734 29 023 2H Ql2

July I 5,746 67,997 41,014 181 ,042 9,738 81,472 56,498 330,510 2 5,746 73,744 37,447 218,490 7,141 88,613 50,334 380,844 3 5,224 78,968 35,664 254,154 21 ,424 110,037 62,312 443,156 4 1 ,045 80,012 32,098 286,251 6,492 116,529 39,635 482,791

D 5 4,179 84,192 30,314 316,566 5 '194 121 ,722 39 68Z 522 gzs 6 4,179 88,371 37,447 354,013 2,597 124,319 44,223 566,701 7 3,657 92,028 23,182 377,194 3,246 127 ,565 30,085 596,786 8 1 ,567 93,595 24,965 402,159 9,089 136,654 35,621 632,407 9 2,090 95,684 5,350 407,509 3,895 140,549 11 ,335 643,742

10 3,134 98,819 7,133 414,642 7,141 147,620 lZ :108 661 ] so

J 11 1,567 100,386 14,266 428,907 8,440 156,130 24,273 685,423 12 2,612 102,998 8,916 437,823 8,440 164,570 19,968 705,391 13 2,090 105,088 12,482 450,306 9,089 173,658 23,661 729,052 14 2,090 107,177 5,350 455,655 2,597 176,255 3,216 3,216 13,253 742,305 15 4,702 111 ,879 5,350 461,005 2,597 178,852 3,216 6 !132 ]5,865 Z58 1ZO

D 16 1,567 113,446 7,133 468,138 2,597 181 ,449 3,216 9,648 14,513 772,683 17 2,090 115,536 10,699 478,837 3,895 185,344 1,354 1,354 3,216 12,864 21,254 793,937 18 2,090 117,625 7,133 485,970 7 '141 192,485 1 ,354 2,708 12,864 25,729 30,582 842,519 19 522 118,148 16,049 502,018 5,843 198,328 0 2,708 9,648 35,377 32,062 856,581 20 1 ,045 119,192 5,350 507,368 8,440 206,768 0 2,708 12,864 48,241 27,699 884,280 21 522 119,715 7,133 514,501 2,597 209,364 1,354 4,062 19,297 67,538 30,903 915,183

J 22 1 ,567 121,282 5,350 519,850 1,948 211,312 2,708 6,771 19,297 86,835 30,870 946,053 23 522 121,804 7,133 526,983 1,298 212,610 4,062 10,833 35,377 122,212 48,392 994,445 24 1,045 122,849 7,133 534,116 2,597 215,207 10,833 21 ,666 16,081 138,292 37,689 1,032,134 25 0 122,849 1,783 535,899 2,597 217,804 5,416 21 ,Qa~ !21 ,lQfi ]22 J26 ZQ 202 ] 103 036 26 2,090 124,939 1,783 537,682 2,597 220,401 6,771 33,853 25,729 225,127 38,970 1,142,006

J 27 0 2,597 222,998 0 33,853 196,182 421,309 192,779 1,340,785 28 1,948 224,945 9,479 43,331 93,267 514,576 104,694 1 ,445,479 29 649 225,594 8,125 51 ,456 109,347 623,923 118,121 1 ,563,600 30 649 226,244 5,416 2!2,8Z2 1Q2 ~4Z ZJ3.ZZ1 lHi !112 1 fiZ2 012 31 649 226,893 4,062 60,935 147,941 881,211 152,652 1 ,831 ,664

J Aug. 1 0 226,893 2,708 63,643 173,669 1 ,054,881 176,377 2,008,041

2 3,246 230,139 6,771 70,413 118,996 1,173,876 129,013 2,137,054 3 0 230,139 0 70,413 67,538 1,241 ,415 67,538 2,204,592 4 0 230,139 0 70,413 54,674 1,296,088 54,674 2,259,266 5 1 ,354 71,767 38,593 1,334,681 39,947 2,299,213 6 5,416 77,184 9,648 1 ,344,330 15,064 2,314,277

J 7 1 ,354 78,538 3,216 1 ,347 ,546 4,570 2,318,847 8 1,354 79,892 9,648 1,357,194 11 .002 2,329,849 9 5,416 85,308 12,864 1 ,370,059 ·18,280 2,348,129

lo 10,833 96,141 35,377 1,405,436 46,210 2,394",339 11 51 ,456 147,597 19,297 1 ,424 ,732 70,753 2,465,092

J 12 20,312 167,908 0 1 ,424,732 20,312. 2,485,404 13 13,541 181 ,449 0 13,541 2,498,945 14 0 181,449 0 0 2,498,9~5 15 27,082 208,531 27,082 2,526,027 16 8,180 216,711 a, 120 2,534,207 17 7,873 224,584 7,873 2,542,080

J 18 2,653 227,237 2,653 2,544,733

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Climatological Data

Climatological data were collected twice daily throughout the season. An

estimated 5.69 inches of rain fell from June 6 to August 18, 1982 for an

average precipitation of .08 inches per day. ~1ean ambient temperature was

11.5° C (52.7° F) while the mean surface water temperature was estimated

to be 10.9° C (51.7° F). Water level dropped an estimated 51 inches over

the course of the season.

Discussion

The operation of .side scan sonar counters at Portage Creek has, for the

past four years, proved exceedingly useful for in-season fishery management.

The array of problems associated with counting fish with sonar at this site

appears to be narrowing. Still, the over-riding problem is how to accurately

apportion sonar counts into individual species. Current in-season methods are

imprecise and tend to suggest artificially altered run timing and magnitude of

species less dominant in numbers. Following the end of the 1982 field season

and during the subsequent data analysis, the problem of species apportionment

was addressed and the contributing factors identified (Minard 1982). In-season

apportionment appears to be skewed by two factors: (1) differing catchability

coefficients for each species and (2) the different time and magnitude with

which each speCies return. An example of how these two factors work in concert

to influence the apportionment process is easily seen in.the case of the king

and red salmon counts. From historical commercial catch data it is clear.that

the king salmon run in the Nushagak typically peaks in. the third week of June

while the sockeye run has traditionally peaked around the fo.urth of July. In

1982 in-season apportionment suggested the peak of escapement for both these

species at about the 5th of July. The reason for this apparent misapportion-

15

J J J ]

J J D J J J J J J J J ]

]

J J

ment of king counts is simply as the sockeye run begins to build, so does

the total number of sonar counts to be apportioned. A single king salmon

early in the run means less, in terms of total escapement, than does a

single king caught during the peak of the sockeye run because of the

different magnitude of the sonar counts at those two times. To compound

the problem, king salmon are readily captured in both king and sockeye drift

nets, used to apportion counts, while sockeye are caught primarily in the

smaller red gear.

To get around the apportionment problem, the 1982 data was evaluated in terms

of daily gill net CPUE by species. The results were encouraging and when

daily escapement estimates using this methodology were plotted and compared

to other indicators of run timing, it was found that the post-season estimates

mimicked more closely the expected trends in run timing. Figure 5 shows

comparative graphs of run timing and magnitude for the in-season and post­

season estimates. Table 5 is a comparison of peak catches in the commercial

district with in-season and post-season estimates of peak escapement by

species in 1982. The methods used post-seasonally are probably more

indicative of actual escapement. Application of these methods to in-season

counts has yet to be tested. Problems arise since the calculation of spawners

per index point is dependent upon having the total escapement by species

already estimated.

Offshore distribution appeared to be less of a problem than reported in past

years. This was probably due to at least two factors. First, a new site

approximately 300 meters upstream on the north bank was used for the operation

16

J Fi"gure 5 .. Nushagak daily escapement estimates by speci es, 1.982. 90

J 80

J 70

~ Pink

J "' -g 60 INSEASON ESTIMATE "' "' :::l. 0

l ;:: 50 Chum ~ .., <:::

J ~ 40 QJ c.

"' u

"' 30 UJ

D Red 20

0 10

D 1 25 30 5 10 20 25 30 4 9 14 19 June July Pink August

J 100 DATE

0 9.0

80 POST SEASON ESJI~~TE

0 ~ 70 "'

0 "0 <:::

"' "' :::l 60 0 .<=

Coho J f-~ ..., 50 <::: QJ

.E QJ

0 c. 40 "' u

"' UJ

D 30

0 20

10

: I LJ

15 20 25 30 5 10 15 20 25 30 4 9 14 .19 Q June 17 July August

·----- -- ·-- - ····-- . --

.]

J J J J J 0 J 0 J 0 0

D I [] ! ..

0 0

J J '

I

Table 5. Nushagak River run timing by species estimated by in-season sonar estimates, post-season sonar estimates and commercia 1 catch data, 1982. ·

Run Timing Peak Da

In-Season Post-Season Commercial seecies Sonar Estimate Sonar Estimate Catch

King 7/ 6 6/24 6/23 - 6/26

Red 7/ 6 7/ 1 7/ 5 - 7/ 6

Chum 7/10 7/ 3 7/ 5- 71 7

Coho 7/25 8/ll 8/ 9 - 8/10

Pink 7/26 7/26 7/25 - 7/26

18

J ]

D D 0 D 0 0 0 0 J J 8 0 0 []

J D 0

.of the sonar gear. This site took advantage of a 3% higher river velocity

which presumably forces the fish shoreward. Secondly, 1982 was a pink

year. The pinks being smaller than are sockeye, chum and coho, tend to be

weaker swimmers. Their preference for the slower velocities found toward

the inner sectors was clearly demonstrated when sector distribution was

evaluated over time (Figure 4). Because of the overall magnitude of the

pink run, the seasonal plot of sector distribution was probably skewed

inward. Had the plot concerned only the sockeye run, then I believe there

would have been a higher percentage of counts occurring in the offshore

sectors.

1982 was the first year that the program was extended to enumerate coho

salmon. In-season and post-season analysis indicated that there were no

special problems with enumerating this species with sonar and.that aspect

of this year's operation is considered to be highly successful.

. 19

J J J ]

J J 0 0 0 J 0 0 g

0 0 [J

J 0 D

LITERATURE CITED

Bucher, W. A. Spawning Ground Surveys in the Nushagak and Togiak Districts of Bristol Bay, 1982. Bristol Bay Data Report No. 93. 29 pp.

McBride, D. H. and Mesiar, D. 1980. Nushagak Sonar Enumeration Project, 1980. ADF&G Bristol Bay Data Report No. 83. 45 pp.

McBride, D. H. and Mesiar, D. 1981. Nushagak Sonar Enumeration Project, 1981. ADF&G Bristol Bay Data Report No. 88. 24 pp.

Minard, R. E. 1982. Nushagak Sonar Species Apportionment Results/Methods, 1982. ADF&G Division of Commercial Fisheries Memorandum. 10 pp. ·

20

J J

J J J

J 0 J

0 0 0

J J •

J

Appendix Table 1.

1982 NORTH BANK OF HUSHAGAK RIVER SIDE SCAN SONAR COUNTS BY SECTOR

DATE

6 14 6 IS 616 6 17 6 1B

619 620 621 622 623

624 625 626 6 27 628

629 630 7 1 7 2 7 J

7 4 7 5 7 6 7 7 7 •

7 9 710 711 7 12 713

7 14.

71S 7 16 7 17 7 18

719 720 721 722 723

SECTOR I 2

2 4

21 1J 19

54 58 58 62 58

BO 356 218 140 631

157 177

2879 7262 8273

105 351 295

2J

•• ISO

93 1960

916 1665·

244 741 929

1682 3515

6586 5729 2792 6166 4769

4 6

IS 18 19

17 27 84

174 101

156 332 704

1117 6019

623 910

8748 5014 2816

277 785 855 133 583

366 347 737

1672 522

581 3181 .2227 2523 2279

4791 5997 3429

12305 13877

7 24 16080 1-4202 7 25 19308 12007 7 26 6476 15083 7 27 18035 10229 7 28 11081 10183

729 730 731 8 I • 2

• J • 4 • 5 • 6 • 7

• • • 9 810 8 II • 12

• 1J 814 B IS 816 a 17

• 18

15750 17660

6995 11334

5240

1962 1238 3393

209 659

156 290 623 527 408

593 266 228 380

77

82

8340 11809 24168 15017 14636

6083 2898 4829

461 275

326 ... 1639 3371

314

438 1348

381 2255 2552

153

3

7 9

25 273 410

413 603 951

1060 555

405 482

2272 2338 6191

650 892

5981 6376 1672

292 472 940 790

1246

801 581

1552 2886 U40

2463 3518 2312 1736 1391

2448 2436 1601 6555

10916

3514 2474 7746 2590 2086

1490 1637 5169 2126 3840

4196 1338 1799

708 474

533 1243 1148 4457 565

670 1637

533 1399 151-4

435

14 II IS

6 25

13 25

105 71

115

215 277

1756 825

2102

322 398

4039 2334

704

107 623 ... 622 396

304 396

1631 1731 628

599 3255 1251 686 927

5

6 II 4 9

12

5 18

152 74

127

233 239 486 288

1212

308 225

1451 1837 1232

264 1837 437

2287 430

199 21581

925 438 264

253 522

1459 457 773

1203 --- 760·. 709 405 318 640

1820 699 3811 980

1296 1067 3148

754 655

673 338

1305 444 610

1049 355 687 480 290

467 343 279

1225 251

825 460 381. 268 410

169

532 407

1859 580 284 ... 280 375 105 102

195 134 410 228 168

.118 126

66 356 126

206 39

247

" 96

128

6

9 24 II

2 9

5 16 ... 86

352

417 478 684 252 710

229 163

1741 1254 1584

2904 1911 12-44 2820 2089

3087 SOB

158-4 6109 202

197 471

118"1 276 502

7

54 45 II 22 37

23 21

!66 155 240

584 578

1240 749

1184

602 234

2611 2615 1760

4792 2993 8484 4405 7995

21-\3 1783 6491 2328 661

356 1565 2331 969

2743

• 65 81 78

137 153

60 30

217 160 376

461 1293 972 873

1937

1173 1904 3057 6203 2024

13516 9851

16196 11710 20524

8210 19671 5927 3542 585

1142 2171 2217 1184 2820

. 887 -2026 ---1689 754 1"17"1 -43-43

2245 7852 14977 633 1473 2171

1033 1195 1507

590 295

1478 625 353

270 444

8293 1460

165

41 205 229 240 214

81 227 lBO 198 439

387 249 114 93 45

112

1124 817

4198 1679 723

1060 1536 1114 1444

534

469 636 458

1120 917

311 310 672 540 816

980 304 152 140

51

266

2104 6018 6734 2740 2113

1304 2096 1663 1592 1246

1025 1050 931

5229 2079

1052 1011

525 ... 534

1341 366 171 344 "167

148

9

36

" 189 400 470

242 93

292 236 387

686 946

1458 516 940

1957 2810 1294 2226 1320

8189 4759 9725

13149 14202

20532 14468 6225 1393 1556

2397 1784 1421 4427 1236

10

51 167 210

"' 625

481 102 364 306 689

724 1888 2073

817 1133

1492 4162 2232 1578 2024

6263 8809 -4943

13704 8221

10080 10737 3700 1433 684

995 1229

777 11275

1275

1689 ... 1Z24-4945 1896 7216 2069 1301 1301 3144 1809

8756 11550 2276 1526 6490 6876 4808 15271 7660 11125

14083 3019 1266 1296 1030

846 941 679

3753 1284

437 363 115 421 565

644 195 343 192 148

128

4374 2096 1898 1234 1475

1293 1150 600

2412 673

·JIB 305 262 448

·1098

851 132 381 93 71

107

II

25 167 174 673 582

347 152 330 664 595

413 4383 4950 3716 1334

1577 4149 1763 1059 1760

1036 1015 1400 2531 2028

1695 2423

11086 2010 476

690 1229

692 1823 1777

971 3544 2230 1314 1862

1836 13066 5450 8103 3500

1426 2178 1512 1277 1170

1822 5307 931

2-467 .,. 407 455 279 290 502

799 257 495 23 96

82

CUMULATIVE 12 TOTAL TOTAL

66 160 137 415 376

239 178

1739 673 698

874 3904 9225

10554 11026

9532 11951

1383 669

1408

2281 1699 2086 2513

21472

683 4043 216-4 3562" 991

431 1803

218 639

2666

844 2914

563 939 872

2176 668

5887 1661 1743

2031 1661 2721 919

1958

1813 3148 836

-4029 703

378 400

81 84 31

335 187 418 64 19

41

339-' 784 890

2467 2737

1899 1323 4606 3721 4293

5248 15156 26038 22185 34419

18622 27975 37179 38427 26577

40026 35105 47045

. 54687 79274

48250 76631 43982 28020

9374

10348 21469 17018 27677 21904

339 1123 2013 4480 7217

9116 10439 15045 18766 23059

28307 -43-463 69501 91686

126105

1-44727 172702 209881 248308 274885

314911 350016 397061 451748 531022

579272 655903 699885 727905 737279

747627 769096 786114 813791 835695

25118 860813 35146 895959 45932 941891 36677 978568 45775 1024343

63760 1088103 59929 1148032 71425 1219457 67075 1286532 51506 1338038

512t9 1389337 44754 1434091 56479 1490570 382t8 .1528818 320 6 "1560824 I .

~~~!: ~!~~~~~: 15782 1615800 21336 1637136 8164 1645300

45~4 1649884 5939 1655823 5869! 1661692

12766 1674458 5649 1680107

8019 1688176 5440 1693616 3844 1697460 5280 1702740 5246 1707986

1851 i709837

198371 248234 132962 .53058 5123.3 55841 99361 209639 202093 181660 124803 152582 1709837

21

J J ~]

J J J J

0 J J J J J 0

J '

~]

·Appendix Table 2.

1982 SOUTH BANK OF NUSHAGAK RIVER SIDE SCAN SONAR COUNTS BY SECTOR

SECTOR DATE

6 14 41 6 15 18 6 16 26 6 17 42 6 18 1

6 19 7 6 20 23 6 21 24 6 22 234 6 23 74

6 24 127 6 25 81 6 26 68 6 27 407 6 28 362

6 29 547 6 30 2255 7 1 4218 7 2 13736 7 3 1686

2

a • 0

10 5

11 32 34

1278 329

121 16 79

222 225

1013 1298

11872 15698

5528

7 4 2492 7603 7 s 5618 11301 7 6 3922 . 2350 7 7 132 2576 7 8 130 1868

7 9 142 379 7 10 20 183 711 52 99 7 12 24 196 713 5 128

7 14 104 404 7 15 95 143 7 16 309 970 7 17 341 2846 7 18 1199 2172

7 19 2299 2227 7 20 1172 5336 7 21 6269 4011 7 22 12134 1-4275 7 23 2317 6780

7 24 22504 8223 7 25 12896 2466 7 26 28402 11895 7 27 54041 10665 7 28 41288 14338

3

5

• 1 1 1

6 1

27 579 439

236 B!

141 505 496

3039 2101 1379 1369 1511

1608 2635 2403 1521 1319

450 346 303 149 101

236 155

. 266 662 .,. !55

1060 754

1777 8368

2060 1582 1272

426 435

7 29 730 7 31 a 1 a 2

24682 20051 30074 25940

8946

5483 162

a 3

• • a 5 ~ 6 a 7

a· a a •

. 8 10 911 a 12

a 13 914 a 15 916 a 17

a 1a

3288 921 692

. 423 623

372 142

1950 . 669

757·

371 461 36

282 62

600

9851 747 8526 620 5859 413 9497 603

2975 193 575 347 145 640 307 581 160 212

136 471 58 94

506 1481 2338 3272

69 581

429 869 214 873 173 . 932 179 1217 452 BOO

57 29

• 16 30 2 6 5

7 2

325 1776

433

644 564 507 912 557

965 677 292 605 365

366 530 911 334 517

490 202 303 245 B!

271 511 339 649 469

129 972 307 954

3671

73~ 672 290 270 211

122 262 439 210 450

169 252 939 771 255

453 346 572 909 573

417 389 545 384 297

23

5

3 14 3 5 6

3 2

492 2082

433

704 1434 1312 1867 392

••• 539 460 576 319

199 563

"541 163 354

492 255 577 652 531

254 1224 U7 519 290

126 939 123 954 496

192 196 120

B! 119

10 149 191 70

459

47 110 434 954 260

136 163 144 220 229

52 63

110 205

21

2

6

0 16 5 1

• 3 5

507 1332

336

427 935 912

1190 57

241 440 309 257 152

390 431 211 23

196

309 235 309 425 397

173 630 244 416 135

194 564

22 353 397

57 169 95 22 13

0 37 70 7

170

47 39 .

269 392 146

27 37

" <5· 139

29 32 55

269 62

7

9 22 16

1 3

12 7

1345 2187

946

703 1901 1430 2035 779

531 914 931 776 729

329 1060

634 404 415

••• 503 <31 651 464

346 1058

661 629 !99

403 966 302

2209 1058

217 293 350

65 132

25 296 177 161 409

56 252 495 979 674

227 262 235 !55 267

226 63

255 219 164

a

21 27 9 3 6

13 3

1141 1887

591

427 1096 1413 1507 517

396 952 399 736 691

299 962 945 504 475

m 463 443 379 760

334 975 603 573 194

229 972 134 776 959

192 415 435

•• 204

96 174 131

. 245 .

510

25 260 640 639 644

309 599 102 115. 313

104 111 !59 102

92

13

9

7

• 926 1181

490

253 790 692

1129 541

643 272 221 565 792

140 663 555 179 429

993 405 309 301 471

299 630 395 199 247

239 650

95 1296

992

164 645 316 !03 257

122 299 131 203 229

45 165 579 340 676

507. 357 530 !55 176

214 32

221 205 246

15

343126 199205 57564 31682 25308 15467 35411 29802 24875

22

10

11 46 6

10 17

5 4

912 1113

470

364 693 597 946 713

396 670 362 559 639

!59 979 356 310 601

1035 392 361 317 330

306 226 259 232 135

171 939 269

1473 529

103 495 479 124 509

56 237 219 301 212

22 315 423 431 600

599 829 289 225 245

336 119 255 436

92

13

25547

11

14 34 10

1 13

17 2

569 749 267

326 467 299 569 470

177 469 362 656 699

73 979 304 210 509

269 379 251 293 249

249 511 lOB 307 111

216 59! 194

1797 1058

50 293 659 130 224

51 !00 119 105 297

42 236

"516 464 397

272 913 433

75 176

249 !51

97 129 297

32

CUHULATIVE 12 TOTAL TOTAL

13 21 17

2 14

16 2

737 739 374

269 966 492 664 333

224 321 557 519 660

164 910

·224 210 331

341 259 145 139 B!

362 202 129 290

73

113 309 313

2601 2315

•• 247 453 101 257

65 50

!SO ., 25

19 119 206 306 254

54 334 163 110 121

110 16 62 64 92

11

162 267 104

91

•• 107 97

6939 15134

5071

4601 9024 7931

11852 5432

8650 10806 21252 36052 13760

162 429 533 624 713

920 907

7846 22980 28051

32652 41676 49607 61459 66891

75541 86347

107599 143651 157411

13810 171221 26429 197650 13256 210906 6565 217471 7133 224604

6551 231155 3642 234797 3583 238380 3770 242150 3598 245748

3326 249074 6360 255434 4698 260132 7650 267782 5687 273469

6491 279960 14057 294017 12782 306799 40399 347198 28940 376138

34575 410713 20338 431051 44754 475805 66077 541882 57986 599868

30864 630732 32243 662975 40866 703841 33!;i91 737432 21806 759238

6927 766165 3490 769655 5966 775621 6577 782198 4891 787089

3561 790650 4133 794783 6501 801284 8288 809572 3645 813217

3406 816623 2524 919147 2900 822047 3689 825736 2627 828363

802 929165

21276 19902 829165

J ]

J J

]

~-] L

0 J J J J

J

[J

0

0

Appendix Table 3.

1982 NORTH BANK OF NUSHAGAK RIVER SIDE SCAN SONAR COUNTS BY HOUR

H 0 U R DATE 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TOTAL

6 14 4 6 15 13 6 16 2 6 17 62 6 18 102

6 19 6 20 6 21 622 6 23

624 6 25 6 ::!6 6 ::!7 6 28

139 41 53

146 119

95 207 289 147 468

4 8 7

84 90

186 33 54 97

136

61 125 145 125 295

16 2

58 BB

142 42 49 65

101

39 139 93

154 226

2 18 s

78 81

75 37 42 72

123

26 118

48 170 205

11 1 17 33 9 12

73 72 89 100

6 29 5 17 44 79

121

4 22 5B 99

128

6 21 61

134 83

lS 34 26

130 58

7 B 13 BB 3B 57 44

58 23 56 55 59 110 81 85 29 53

13 47 25 24 6 22 28 28 41 49

103 102 199 246

44 18 40 34 42 32 44 25 32 24 96 105 63 86

74 0 0 155 149 190 95 198 203

49 61 80 158 126 56 105 162 147

92 51 77

116 121

70 57 61 89

115

99 57 so

161 115

146 54 82 86 63

82 79 30 13 41 49 57 223 93 65

65 67 60 69

311 200 347 127 23 105

57 68

243 102 92

146 114 as 96 211 221 212 us BJ 353 709 2579 2044 86 154 34 505 398 248 73 67 665 801 14 509 1575 2147 304 271 42 1067 2383 705 20 819 111 478 1894 914 477 431 2447 1947 96 BOO

57 52

403 163 145

72 76

351 146 489

33 110 289 193 230

92

" 197 231 199

38 42

228 293 176

31 52

299 185 260

51 so

189 188 384

59

" 410 185 279

95 41

854 150 368

32 44

210 169 169

290 331 316 331 299 459 480 521 374 157 252 203 99 954 565 1110 1347 1018 1163 765 793 410 3786 3498 847 1456 4030 3205 170 481 314 232 881 919 4684 3187 1041 1071 1626 957 80 1489 4695 2618 1610 4793 2543 1883 1626 1831

5 51 47

135 167

40 so

134 126 323

114 229 688 955 573

339 784 890

2467 2737

1899 1323 4606 3721 4293

5248 15156 26038 22185 34419

6 29 268 6 30 173 7 1 .ns 7 2 203 7 3 534

m~semmm==1m~mrna1mmm--~--m•~ 90 30 54 144 317 4635 1978 2896 1499 2392 2949 1424 2269 453 798 1452 778 1182 633 293 248 736 552 27975

589 127 94 1207 2730 3126 4609 1712 4973 3887 2048 1723 328 254 346 813 1062 1142 2241 1533 434 334 1152 37179 1aO 207 1015 2044 459 4213 6687 4309 4828 954 604 498 1278 1020 1042 1411 1605 2333 1783 942 2aO 310 222 38427 266 99 940 1965 374 1192 1963 3031 1317 333 1275 409 610 513 739 990 2399 2251 2174 1402 779 792 200 26577

7 4 137 885 215 431 3941 3408 2993 2963 S757 6148 1464 332 1283 1335 820 516 1276 1127 830 1737 480 651 894 403 7 5 132 529 1066 1360 3295 987 882 1060 968 1467 2612 3696 1093 2068 4749 1376 1608 1249 720 2918 445 171 344 310 7 6 460 489 722 1305 1198 769 2648 4963 2522 549 1011 1794 902 786 2991 4001 1322 709 1091 3047 972 1713 6510 4571 7 7 2833 2392 1561 1387 2343 1617 1534 956 2649 2i31 3955 1380 1783 1859 2470 5379 3396 5616 1391 2009 1583 825 1654 1984 7 8 3501 2629 1384 817 1506 937 281 571 2186 3968 5851 3729 5593 6729 8574 9621 3835 1977 776 1820 844 1515 4822 5808

7 9 2307 577 427 7 10 2048 1a69 895 7 11 2839 2385 613 7 12 340 299 262 7 13 209 242 162

174 442 1595 4985 1a19 1024 2.<132 1156 22a7 144a 2693 2823 2112 2418 1740 2124 a46 2097 2368 3411 4945 73 171 236 1344 43.<13 1642 1559 4042 4043 5.<167 5017 5755 5609 7554 5694 3115 2328 23S7 2902 <1728 38<10

618 479 487 709 1303 782 2004 2073 3310 2285 3387 2948 2356 1407 1280 1575 1039 968 4144 4717 274 857 2406 3991 139.<1 328 201 248 899 1876 259 2892 2741 2917 1939 <120 434· 895 896 427 770 329 11469mrn~mm273116m~~===~~millmm

7 14 203 264 63 54 90 125 127 96 90 142 1 1s 195 143 zn 1a6 333 265 -269 313 455 27B 7 16 256a 1742 149 155 379 500 412 374 303 270 7 17 1013 1462 1351 1155 996 770 1469 1366 1411 a16 7 18 321 102 172 67 555 563 1884 1080 1191 1005

246 677 324 510 755 1101 864 547 570 776 653 698 sse 14so 2593 43o 95 630 526 278 765 a61 521 447

Sa2 2a5 655 502 355 2361 998 456 654 739 479 1030 2153 866 796 297

563 525 862 642 n3 7os 747 1282 1634 2312 3796 926 a43 687 1182 1539 945 847 278 974 1226 2124 2796 1976 434 339 764 2702 2357 1354

7 19 435 375 319 789 334 1963 892 1248 1018 753 342 1816 1393 1540 1714 809 709 1207 1915 847 1460 365 714 2161 7 20 670 807 765 972 569 868 3642 946 1a06 1255 927 1250 1420 733 2186 1117 4070 979 1837 1163 1670 1200 1190 3104 7 21 1006 543 614 587 769 228 766 1148 4820 1497 699 1172 2496 1347 1724 1536 3740 5159 3411 4154 4299 1691 1208 1318 7 22 1185 952 831 1650 -1397 2437 995 1360 2633 1462 1237 1434 712 1520 1308 1517 2206 1420 1616 1488 2099 1830 2810 57a. 7 23 148 166 410 666 2393 3280 1320 393 557 1284 1355 2126 1811 3935 1164 1454 4624 2239 2479 1836 3333 3173 3999 1630

7 24.1358 408 354 278 1299 1700 1444 1165 319 1671 841 2108 13S7 3780 1600 2102 5245 4706 2851 3505 9663 5841 5421 4744 7 25 1569 611 207 261 1872 2401 5753 5381 3026 1799 724 1336 2110 615 1046 1597 3895 1462 3436 5878 5091 2a52 2519 44a8 7 26 3324 2054 967 614 1401 2557 7608 8341 3483 3244 3269 2891 1245 2634 1167 3061 3561 3711 2764 2501 3299 2280 1590 3a59 7 27 3694 1455 723 675 960 2254 4740 4908 6584 7561 4332 2857 1112 1327 1784 3007 2666 844 2336 2422 2569 3859 2441 1965 7 28 1669 3a6 390 sao 831 2413 4139 3433 5438 6654 2194 787 1680 689 1765 2673 2218 2495 1558 1483 2239 2002 2291 1499

40026 35105 47045 54687 79274

4a250 76631 43982 28020

9374

10348 21469 17018 27677 21904

25118 35146 45932 36677 45775

63760 59929 71425 67075 51506-

7 29 775 704 7 30 1945 1409 7 31 1859 1467 a 1 1475 930 8 2 1212 839

417 448 532 307__ 405

270 75a 2000 3283 2705 4938 5880 2093 1925 1460 2238 1961 2521 2110 3514 1916 2296 1992 592 2569 2382 51299 571 1501 5496 2006 2181 1554 2033 1397 1413 1396 1006 1435 2190 2892 1989 2543 1785 1395 1865 2064 2240 44754 374 921 2908 5251 3885 4092 4504 1240 1920 2041 1618 1484 5342 1981 3235 2751 1268 1507 1905 3095 1299 56479

a 3 399 8 4 1200 8 5 329 a 6 473 s 7 267

9 8 113 a 9 43 a 10 169 a 11 60 8 12 8

a 13 20 e 14 35 9 15 30 s 16 23 s 17 24

254 _386_17_97 __ 3261 3075_2601_1578 1761_1066_1524 _1368 __ 922 __ 876 ___ 924 ___ 949 ___ 911__1156 _2675_2999__ 3193 __ 2260_ 38248_ 207 898 2315 3550 4542 2578 2042 2044 1177 696 479 1022 594 1170 794 673 831 1243 1406 806 483 32006

428 404 393 964 739 474 176 303 394 513 546 751 174 223 205

563 1284 1920 2109 1757 647. 351 272 473 744 1070 372 400 a32 1212 1775 1290 839 775 475 342 393 326 341 692 765 594 841 498 "s23 405 340 684 621 1311 702 65a 1693 1096 775 652 618 2623 1078 885 419 1321 1481 282 485 410 813 286 285 487 466 .<131 124 176 279

747 610 487 384 2241 1060 1190 899 333 464 601 538 756 2185 761 385 618 540 789 928 834 1073 11.<19 . 673 799 623 959 783 1262 752 353 223 620 558 399 329 296 295 181 93

20794 18400 15782 21336 a164

so 50

104 32 31

116 52 64 45 31

34 11 32 262 29 29 33 20 23 38

76 128 345 326 292 290 94 105 234 273 332 146 67 131 398 ·197 335 216 so 73 820 1163 706 700 24 31 191 791 792 385

221 261 102- 119 57 99

767 719 261 114

269 182 93 275 114 154 154 126 177 2Sa 246 281" 615 467 1n 90 111 152 206 256 292 829 . 896 1149 869 660 492 464 86 93 183 665 399 371 172

140 481 528 630 132

173 400 629 493 126

167 457 701 662 260

324 454 SOB 379 199

212 334 316

76 246

~u=~mmmmmmm-mmm~==~~ 3739ffimNmm=mmm5==•-m~1m~w 26 22 119 197 416 331 281 215 140 218 168 222 130 178 142 137 186 194 207· 191 uum=mwmm•mm1~rnmww~mm• 44~1urn~mrumrum=~a1143mm~~m~

79. 45a4 93 5939 66 5a69 32 12766 56 5649

53 24 37 43 42

8069 5440 3844 5280 5246

' 18 11 29 30 18 36 63 92 71 133 120 79 77 83 4a 54 180 159 125 131 94 110 51 42 25 ·1851 ---- --- ---- ---- ---- ---- ---- ---- --- ___ ..:. --- ---- ~-- ---- --- ---- ---- -- -- --- --- --- ---- ----

48416346302174923457455526706597880994379242391082712806787460447691037663592294935687899975439796138546276559887?0721031709837

' 23

J

]

J J

J J J J J

J J J J

Appendix Table 4.

1982 SOUTH BANK OF NUSHAGAK RIVER SIDE SCAN SONAR COUNTS BY HOUR

H 0 U R DATE 1 2 3 5 6 7 B 9 10 11 12 13 14 15 16 17 !B 19 20 21 22 23 24 TOTAL

6 14 6 6 15 14 6 16 12 6 17 12 6 18 1

6 19 5 6 20 3 6 21 s 6 22 561 6 23 210

6 24 49 6 25 374 6 26 427 6 27 538 6 28 598

6 29 152 6 30 107 7 1 430 7 2 751 7 3 773

7 4 318 7 5 239 7 6 252 7 7 128 7 a 157

7 9 127 7 10 103 7 11 124 7 12 144 i 13 167

7 14 7 15 7 16 7 17 7 18

167 us 235

60 12

7 19 266 7 20 519 7 21 814 7 22 139 7 23 121

7 24 .172 7 25 80 7 26 498 7 27 520 7 28 286

3 2 12 7 1 7 3 10 0 0

3 3 1

393 117

0 0 0

213 101

1 B 7

5 B 0 4 9 20 .23 13

416918 915229

0 16 0 1 5

2 26 15 12 8 10

2 2 6 14 9 7 9 1 1 0 3 1 3 3 8 7 14 0 0 1 3 2 • 2 3 5 4 0 0 9 2 7 1 5 2

7 2 ' 4 7 9

11 5 6 298 617 749 94 400 511

0 5 11, 7 0 3 5 4 8 9 30 9

903 1076 1246 632 220 140 319 232

B 2

76

~· m

6 3 5 3 2 2

133 248 408 813 1261 722 292 225 265

0 1

m 902 1<5

,. 0

511 ro 153

• 2 3 5 6 1 3 0 1 17

6 17

<21 211 110

2 2

407 60< 123

• 9 2 2 B

1 0

526

"' 233

1 16 B 0 3

7 7

526 <06 180

7 6 2 2

' • B

610 537

95

0 11 12 3 8 10 2 1 1 3 ,_ 2

1 5 5

3 0

567 <86 239

5 2

"' 533 3<0

0 3

957 377 156

~~oo~mmmu1~m141•mm~rum~mM~mwm m~-~~-~~mmm~G-m•mlli~mm-­mwrn=,•m~~~~mm~mmmillmmmmmw mrn==rnmm~rnmm~m~~w~mmwrn-= 299 421 262 198 382 252 201 213 236 119 6 141 22 26 16 83 94 225 182 289 646 333 188

m~millW!rn--~m~~m~wmmmmmrnmm '''"~~m~u!•mmmm~m=•~mmrn~m~ mmromm~~=-~~~mrn~m=-m=~-~~~m 651 1951 329 671 899 1115 2168 2246 2557 2205 2045 3239 3004 1851 1470 1415 1859 1377 1041 968 11!57 946 137 m~~m•ro~mro!rummmmmm-916mm-mm

m~m~mm~m~mG~ill-mlmmill--lm~~ 258 330 202 569 415 523 1130 1025 1128 4668 3378 1938 2675 936 1004 854 849 1090 729 807 328 916 438 amm~lamrnrnm~mrnmrnmmm<1Smm~~91

rn1U371~B~mm-m219mm~mmmmrum~=m 113~nmmmmmm~m3u~mwmm~wrumm113

106 184 65 136 189 89 66 100 87 70 56 144

122 110 143 187 124 99 55 81

251 277 199 168 333 185 136 172

96 122

120 376 360 185 458 113 158 128 119 362 228 228 119 143 145 255 357 262 227 181 192 99 87 101 215 229 205 101 92 114 121 276 192 203 142

128 236 2347 167 90 122 119 195

148 69 52 63 94 97 90 150 86 86 160 206

72

" 78 29 51

~

39 38 31 17

19 150 156 128 135 153 105 213 214 134 249 141 161 71 266 253 194 173 85 254 244 404 345 354 502 192 35 121 129 93 115 58 151 146 127 233 237 372 254 74 270 476 335 163 382 253 410 233 435 595 129 822 34 389 361 245 165 193 354 246 361 458 580 353 173 - -- ·-··· . --------·------------------------------·-

140 226 112 <B2 3<3

!59 2<9

" 511 157

162 144 184 141 71 108

142 336 216 212

142 130 115 86 122 243

103 110 112 346 195 153

99 316 227

115 336 367

"' 15<

98 141 369 815 284 7-48 146 334 96 102

193 177

"' 307 66

155 m

75 555 336

64 99

129 116 106 66

201 163 161 .. ,

nooM~~rnm~rnrnmmw~m~mwrnnwm~ ~115131•mwwmm~rn~-~•rnmmm~~mlrn m~w~rul<!mmm~m•~mmm-mm~mm~ 288 587 1646 1723 3316 4828 1153 1026 3424 3735 2332 1091 1184 1440 1752 2185 2128 1500 547 1227 1804 1072 272 131 158 85 461 1137 2075 1109 461 574 1333 1302 1641 1916 1459 937 908 2733 3258 2973 1076 2196 644 252

109 139 81 49

427 109 194 133

as 185

155 489 1123 2729 5368 1541 2406 3723 1838 2148 1294 1082 2926 1642 1143 1286 1442 825 399 403 193 %~~=~-m-~-•m=mlrn=wmm~~

125 565 1393 3470 2931 3861 2170 948 1513 2111 1541 4046 3482 1640 1683 2634 3070 2488 2033 1245 771 rnm~m6=-~=~~=--~~~3113~~~= 133 567 1873 2714 2591 4099 5976 5112 4680 4292 5300 4043 2248 2560 1358 1998 1999 2675 1125 1693 394

162 267 104

91 89

107 87

6939 15134 5071

- 4601 9024 7931

11852 5432

8650 10806 21252 36052 13760

13810 26429 13256 6565 7133

6551 3642 3583 3770 3598

3326 6360 4698 7650 5687

6491 14057 12782 40399 28940

34575 20338 44754 66077 57986

729 7 30

-, "31 B 1 B 2

241 103 75 152 91 48

-tea -19a- -9o-

61 486 1350 1526 2441 5090 3921 3113 1968 2282 670 1675 1851 572 768 807 810 312 579 66 97 30864 39 1314 2600 107 52 184 1146 2200 3239 4381 5657 2418 1782 2386 1105 1043 588 254 425 270 762 32243 89 ·1345-1920 3137 2109 ·1149 ·t649 1466 ·1302_··1754· 2172 4507-5526· 3368 ·3128 2753-1324· 1137- 457· ·140 - 58 · 40866-45 359 2987 4203 4233 2996 2198 1711 910 1102 1269 1321 1811 1611 2096 1553 737 952 569 432 242 33591 d•-==~m~~~-mmm~w~mw~~~

65 121 68 173 87 50

a 3 67 e .., 151 a s 133 8 6 118 B 7 105

B B B 9 B 10 B 11 B 12

B 13 B 14 B 15 816 B 17

B !B

.. 82 50

lOB 27

32 25

6 9

21

"

35 17 90 68 88 195 70 104 74 33

35 21 30 41 36 35

124 51 24 22

13 . 15 12 29 14 34 12 19 7 ,.

3 6

46 127 71 205

193 366 115 265 71 226

534 307

"' 392 270

20

•• 26 39 28

13 27 2< 10 71

•

76 189 sa 157 26 94 59 236 26 133.

22 97 10 94 23 149 19 112 16 72

77 46

796 2130 274 432 376 195 322 251 533 743

920 428 382 156 313 155 415 410 438 267

.,. 106 79 ...

233

132 171

•• 304 141

"' .,. 210 277 155

302 219 192 215

"' 28

400 175 72 . 169 64 606 223. 112 158 76 331 359 191. 474 209 180 396 248 448 600 179 417 166 319 383

167 30 145 63 188 140 t3o · 15S. 15~ 121 178 68 69 57 108 119 148 168 157 193 87 .65 263 356 . 466

85 101 66 36 20

139 368 120 197 60 892 91 62

217 453

222 79 so

1<5 20

67 75 148 104 106 102 229 318 57 326 1214 7S1 352 291 . 312

225 186 276 273 222 134 229 166 150 271 199 229 155 173 174

11 12 26

123 101 139 89 114 680 197 329 48 107

191 295 94 159

154 97 569. 549 218 217

433 540 116 67 328 299 438 161 70 109

16 31

" 7 48 44 41 843

482 1238 157 2.28

329 552 339 691 99

135 89

298 <95 76

11

185 <90 722 463 66

132 57 ,.,

190 •• 15

60 35 35 <16 74 228

258 98 176 94

128 187 340 2<0 100

5< 48

100 240

60

22

140 157 660 295

" 66

146 ., 131

10

51

22 ., ,., 106 169

, .. Bl

891 203 27

158 138 131 126 56

.,

78 75 99 134 94 112 77 80 34 54

62 38 36 30

432 \ 221 166 25 30 20

83 31 S1 33 66 30 17 11 52 19

51 23

6927 3490 5966 6577 4891

3561 4133 6501 8288 3645

3406 2524 2900 3689 2627

802

12614 8493 9496 75751982139893501474953547352504845299042572438374723342226443493925238110389983305732703295522713021746 829165

• 24

J 0 J ]

J J ]

J J ]

]

J J ]

J J J [J

[J

AH;:endix 'll:lble 5 • N.Jshagak River s:xXeye salmn escapement age, length am sex stmraries, 1SS2.

1'GE GlUJP

42 52 53 62 63

MIILES

Percent 4.80 48.80 o.oo 2.10 6.40

Av Lergth 444.67 597.83 o.oo 621.50 600.56

std Error 8.43 1.17 0.00 7.15 3.04

Sanp Size 27 272 0 12 36

FEM\LES

Percent .80 31.90 .10 1.60 3.50

Av Lergth 469.60 562.23 537.00 591.44 570.40

std Error 26.ll 1.38 o.oo 8.67 3.57

Sanp Size 5 177 1 9 20

SEXES a:M3INED

Percent 5.60 80.70 .10 3.70 9.90

Av Lergth 448.23 583.76 537.00 608.50 589.90

std Error ll.l9 1.25 o.oo 7.80 3.23

Sanp Size 32 449 1 21 56

-25-'

'lbtal

62.10

587.07

2.13

347

37.90

562.20

2.47

212

100.00

577.64

2.26

559

J J J

Appendix Table 6. Nusha~ak n J r1ALES

c, ERCEIIT

JV LENGTH TD ERROR

SAMP SIZE

]EHALES

lERCENT

l.Jv LENGTH STD ERROR

DAHP SIZE

SEXES COMBINED

JERCEIIT

c;t! I.EIIGTH 'lTD ERROR :JAHP SEE

J j

']

0 J J J J

31

.40

566.00 25.24

3

.30

531.00 27.00

2

.70

~51 • 00 25.94

5

river esc~peMent of chuM

AGE 41

20.40

603.09 1. 98 134

20.10

568.40 2.20

131

40.50

585.87 2.09

265

GROUP 51

36.80

613.17 1.95 240

18. 10

581.80 2.43

119

54.90

602.83 2.11 ~eo .::; ,J !

-26-

sa.l11on, a·3e and len'3th

61

3.00

638.85 6.01

20

.90

592.00 11.70

6

3,90

628.04 7.33

26

TOTAL

.;o. 60

610.74 2.34 397

39.40

574.81 2.72

258

100.00

596.58 2.49

65'S

(MM) by Se):, 1982