SALMON AND SALMON FISHERIES OF SWIFTSURE BANK 
793 
Table 40. — Index of abundance of coho salmon from Puget Sound purse seines 
Indices from individual size classes 
Year 
10-14 net tons 
15-24 net tons 
Number of 
fish 
Number of 
deliveries 1 
Average 
delivery 
Number of 
fish 
Number of 
deliveries 
Average 
delivery 
Weighted 
number of 
deliveries 
Weighted 
average 
delivery 
1911 ... 
5, 760 
214 
65 
88. 62 
1912 
8 
26. 75 
11, 169 
93 
120. 10 
no 
101. 54 
1913 - 
4, 231 
18, 784 
12, 732 
8,940 
60 
70. 52 
8, 261 
29,015 
45, 495 
105 
78. 68 
124 
66. 62 
1914 
146 
128. 66 
255 
113. 78 
303 
84. 16 
1915 
243 
52. 40 
606 
75.07 
788 
57. 73 
1916 
266 
33.61 
26, 218 
410 
63. 95 
533 
49. 19 
1917 
5, 689 
387 
14. 70 
18, 050 
58, 685 
754 
23. 94 
1,010 
620 
17.87 
1918 
27, 552 
13, 846 
2, 188 
12, 637 
266 
103. 58 
459 
127. 85 
94. 65 
1919 
247 
56.06 
28, 481 
430 
66.23 
581 
49.02 
1920 
66 
33. 15 
13, 808 
45, 580 
146 
94. 58 
196 
70. 45 
1921 
154 
82.06 
477 
95. 56 
634 
71.89 
1922 
7,999 
6, 049 
132 
60.60 
35, 216 
31, 433 
326 
108. 02 
434 
81. 14 
1923 
128 
47.26 
435 
72. 26 
583 
53. 92 
1924 
4,643 
80 
68. 04 
23, 038 
305 
75. 53 
400 
57. 60 
1925 
11, 921 
222 
53.70 
38, 578 
553 
69. 76 
724 
53. 28 
1926 - 
3,406 
6, 962 
122 
27. 92 
34, 477 
498 
69. 23 
647 
53. 29 
1927 
178 
39. 11 
35, 280 
655 
53. 86 
858 
41. 12 
1928 
8,174 
14, 327 
242 
33. 78 
70, 146 
1,046 
67.06 
1, 360 
51.58 
1929 
440 
32. 56 
74, 835 
1, 489 
50. 26 
1, 995 
37. 51 
1930 
6, 275 
135 
46. 48 
25, 781 
542 
47. 57 
726 
35.51 
1931 
7,360 
8, 255 
253 
29.09 
54, 040 
1,277 
42.79 
1,711 
31.93 
1932 
157 
52.58 
58, 166 
1, 072 
54.26 
1, 447 
40.20 
1933 - - 
5, 545 
334 
16. 60 
35, 987 
1,600 
22. 49 
2, 144 
16. 78 
1934 
4,486 
240 
18.69 
36, 357 
1,069 
34. 01 
1, 421 
25. 59 
207, 975 
4, 571 
838, 696 
14, 602 
19, 349 
Indices from individual size classes 
Index from grouped size classes 
Year 
25-39 net tons 
Number of 
weighted 
deliveries 
Number of 
fish 
Number of 
deliveries 
Average 
delivery 
Weighted 
number of 
deliveries 
Weighted 
average 
delivery 
Number of 
fish 
Weighted 
average 
1911 
1,024 
10 
102. 40 
18 
56.89 
6, 784 
83 
81.73 
1912 
11, 383 
13, 559 
48, 329 
58, 872 
118 
96. 47 
1913 
1, 067 
530 
9 
118. 56 
16 
66.69 
200 
67. 80 
1914 - 
8 
66. 25 
15 
35. 33 
464 
104. 16 
1915 
645 
16 
40. 31 
29 
22.24 
1,060 
821 
55. 54 
1916 - 
1,345 
12 
112. 08 
22 
61.14 
36, 503 
35, 629 
44. 46 
1917 
11, 890 
14, 677 
11, 833 
211 
56. 35 
390 
30. 49 
1, 787 
1,090 
1,062 
406 
19. 94 
1918 - - 
110 
133. 43 
204 
71.95 
100, 914 
64, 160 
27, 308 
92. 58 
1919 - 
125 
94. 66 
234 
50. 57 
51.00 
1920 
11,312 
78 
145. 03 
144 
78. 56 
67. 26 
1921 
58, 882 
40, 542 
34 578 
424 
138. 87 
780 
75. 49 
117, 099 
1, 568 
74. 68 
1922 
176 
230. 35 
326 
124. 36 
83, 757 
892 
93. SO 
1923 
295 
117. 21 
546 
63. 33 
72, 060 
43, 889 
82, 208 
98, 465 
97, 939 
175, 706 
180, 655 
85, 653 
1, 257 
672 
57. 33 
1924 
16, 208 
103 
157. 36 
192 
84. 42 
65.31 
1925 
31, 709 
60, 582 
303 
104. 65 
661 
56.52 
1, 507 
1,753 
54. 55 
1926 
532 
113. 88 
9S4 
61.57 
56. 17 
1927 
55, 697 
624 
89. 26 
1,167 
47. 73 
2,203 
3,907 
5,214 
2, 321 
5,290 
4,664 
6, 209 
44.46 
1928 
97, 386 
1, 239 
78. 60 
2, 305 
42.25 
44. 97 
1929 
91, 493 
53, 597 
1, 486 
61.57 
2, 779 
32. 92 
34. 65 
1930 
781 
68. 63 
1,460 
36.71 
36. 90 
1931 
95, 752 
153, 377 
1, 760 
54.40 
3, 326 
28.79 
157, 752 
219, 798 
107, 796 
106, 012 
29. 82 
1932 
1,619 
1 974 
94. 74 
3,060 
3,731 
50.12 
47. 13 
1933 
66, 264 
33. 57 
17. 77 
17. 36 
1934 
65, 169 
1,047 
62. 24 
1, 968 
33.11 
3, 629 
29. 21 
975, 559 
12, 942 
24,257 
2, 022, 230 
48, 177 
1 Number of deliveries and weighted number of deliveries identical for this group, as efficiency weighting is unity. 
