Fishery bulletin of the Fish and Wildlife Service - NOAA
Fishery bulletin of the Fish and Wildlife Service - NOAA
Fishery bulletin of the Fish and Wildlife Service - NOAA
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288 SALMON OP THE KARLTJK KIVER, ALASKA<br />
1<br />
2<br />
3<br />
4<br />
5<br />
1<br />
2<br />
3<br />
4<br />
6<br />
Age <strong>of</strong><br />
seaward<br />
migrants<br />
marked<br />
Total<br />
Age <strong>of</strong><br />
seaward<br />
migrants<br />
marked<br />
Total<br />
> See text.<br />
Calculated<br />
number <strong>of</strong><br />
each age<br />
marked<br />
9,381<br />
5,580<br />
39<br />
15, 000<br />
Calculated<br />
number <strong>of</strong><br />
each age<br />
marked<br />
11, 420<br />
2 416<br />
164<br />
14,000<br />
TABLE 41.—Data, for <strong>the</strong> third 19SS marking experiment<br />
Age <strong>of</strong> fish<br />
returning<br />
from 1932<br />
migration<br />
4i<br />
( 4a<br />
) 52 1 6><br />
( 4i<br />
fi 5<br />
1<br />
' 6j<br />
1 7><br />
5,<br />
61<br />
7i<br />
8,<br />
6s<br />
7j<br />
8s<br />
Calculated<br />
number <strong>of</strong><br />
each age<br />
group<br />
examined<br />
837<br />
12,225<br />
5,525<br />
148<br />
1,041<br />
88,164<br />
26,012<br />
113<br />
2,077<br />
56,668<br />
9,551 57<br />
60<br />
171<br />
46<br />
203 593<br />
Number <strong>of</strong><br />
marked<br />
fish <strong>of</strong><br />
each age<br />
group<br />
found<br />
175<br />
8245<br />
68<br />
29 1<br />
364<br />
Percentage<br />
occurrence<br />
<strong>of</strong> marked<br />
fish in fish<br />
examined<br />
0.198<br />
3.540<br />
.241<br />
.120<br />
.304<br />
1.754<br />
Calculated<br />
number <strong>of</strong><br />
fish <strong>of</strong><br />
each age<br />
group<br />
returning<br />
2,811<br />
53 258<br />
41 299<br />
790<br />
6,771<br />
632, 884<br />
1.281<br />
20, 626<br />
494, 716<br />
100, 909<br />
664<br />
418<br />
1 778<br />
207<br />
1, 662, 491<br />
Calculated<br />
number <strong>of</strong><br />
marked<br />
flsh<br />
returning<br />
TABLE 42.—Data for <strong>the</strong> fourth 19SS marking experiment<br />
Age <strong>of</strong> fish<br />
returning<br />
from 1932<br />
migration<br />
Г<br />
4i<br />
4l<br />
1 5i<br />
[ 61<br />
4î<br />
5]<br />
6)<br />
73<br />
54<br />
61<br />
It<br />
g,<br />
6s<br />
7i<br />
8s<br />
Calculated<br />
number <strong>of</strong><br />
each age<br />
group<br />
examined<br />
837<br />
12, 225<br />
6,525<br />
148<br />
1,041<br />
88,164<br />
113<br />
2,077<br />
56,666<br />
9,651 57<br />
60<br />
171<br />
46<br />
203. 593<br />
Number <strong>of</strong><br />
marked<br />
flsh <strong>of</strong><br />
each age<br />
group<br />
found<br />
2<br />
99<br />
20<br />
11<br />
1<br />
234<br />
Percentage<br />
occurrence<br />
<strong>of</strong> marked<br />
fish in fish<br />
examined<br />
0.016<br />
.112<br />
.035<br />
.115<br />
585<br />
Calculated<br />
number <strong>of</strong><br />
flsh<strong>of</strong><br />
each age<br />
group<br />
returning<br />
2,811<br />
53.258<br />
41, 299<br />
790<br />
6,771<br />
632, 884<br />
1,281<br />
20, 626<br />
494, 716<br />
100, 909<br />
664<br />
418<br />
1 778<br />
207<br />
1, 662, 491<br />
1,253<br />
45<br />
50<br />
594<br />
307<br />
12<br />
3 185<br />
Calculated<br />
number <strong>of</strong><br />
marked<br />
fish<br />
returning<br />
9<br />
709<br />
173<br />
116<br />
10<br />
2.157<br />
Percentage<br />
return at<br />
various<br />
ages<br />
13.4<br />
9.8<br />
.6<br />
.9<br />
10.7<br />
5.5<br />
.2<br />
Percentage<br />
return at<br />
various<br />
ages<br />
(•)<br />
6.2<br />
Total<br />
percentage<br />
return<br />
1 1<br />
23.7<br />
17.3<br />
0.0<br />
Total<br />
percentage<br />
return<br />
1 «<br />
1<br />
ï<br />
i 16.2<br />
7.2<br />
4.8<br />
6 1<br />
1<br />
><br />
I<br />
)i<br />
)<br />
12 0<br />
6 1<br />
In <strong>the</strong> second experiment (table 40), 15,000 seaward migrants were marked by<br />
amputation <strong>of</strong> <strong>the</strong> adipose <strong>and</strong> right pectoral fins, 286 fish were recovered, <strong>and</strong> a<br />
calculated total <strong>of</strong> 2,555 fish returned (17.0 percent). The return from <strong>the</strong> 3-, 4-, <strong>and</strong><br />
5-year marked fish was 20.7, 14.6, <strong>and</strong> 9.8 percent, respectively.<br />
In <strong>the</strong> third experiment (table 41), 15,000 seaward migrants were marked by<br />
amputation <strong>of</strong> <strong>the</strong> adipose <strong>and</strong> left ventral fins, 364 fish were recovered, <strong>and</strong> a calculated<br />
total <strong>of</strong> 3,185 marked fish returned (21.2 percent). The return from <strong>the</strong> 3-,<br />
4-, <strong>and</strong> 5-year marked fish was 23.7, 17.3, <strong>and</strong> 0.0 percent, respectively.<br />
In <strong>the</strong> fourth experiment (table 42), 14,000 seaward migrants were marked by <strong>the</strong><br />
amputation <strong>of</strong> <strong>the</strong> adipose <strong>and</strong> left pectoral fins, 234 fish were recovered, <strong>and</strong> a calculated<br />
total <strong>of</strong> 2,157 fish returned (15.4 percent). The return from <strong>the</strong> 3-, 4-, <strong>and</strong><br />
5-year marked fish was 16.2, 12.0, <strong>and</strong> 6.1 percent, respectively.<br />
Two marked fish <strong>of</strong> <strong>the</strong> 4a age group were recovered (table 42). However, according<br />
to <strong>the</strong> data presented, no 2-year seaward migrants were marked. Some 2-year
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