Translation Series No.1211

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• 66 65 64 63 62 61 60 58 57 56 55 54 10 15 20 - 25 Fig. 24 c. Recapture of tagged mature salmon. Released near 14emel, Nov. 1960. - 98 - [P. 285]
• - 99 - fish. The tagging does not give any information about the course of the later movements until the fish ente r . the home stream. We do know, however, through the analyses of the stock, that the age composition changes each year beginning in April/May on account of the emigration of the spawning fish. This is also clearly indicated by the reduction in the average weight (Table17). The change caused by the emigration of the larger fish extends into June.,(There are n4 data for July on account of the cessation of the fishing.) It is, however, not known that the share of the large fish does increase at this time On the fishing grounds 4 or 5, which have to be crossed by the maturing fish. Table 23. Number of salmon of more than 5 kg weight on various - fishing grounds as percentage of the total catch. Bornholm Month 58 .5.2 (60) 61 Mean 58 .52 60 61 Mean 59 60 (61) 62 59 60 61 62 • Nov./Dez. 60 55 (27) 29 48,0 37 31 38 19 31,3 Jan./Febr. • 55 31 (44) 26 37,3 41 36 24 13 28,5 MârziApril 39 15 10 21,3 36 21 40 31 32,0 On the Pther hand, Table 23 indicates that the share of the fish over 5 kg in weight in the catch near Bornholm diminishes during the course of the season. This phenomenon could perhaps be explained by the beginning of the emigration of maturing salmon. Danzig Deep Many papers have been published about the "homing" of the salmon about to spawn. Especially important are the results of A. D. Hasler (1954, 1960), who could demonstrate a "sun-compass mechanism" and, among other things, a long-persisting olfactory memory in Pacific salmon. J. B. Brett and C. - Groot (1963) speak of the innate ability in sockeyesalmon (Oncorhvnchus nerka) to be able to keep s8..u. sun-compass diredeon and they
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FISHERIES RESEARCH BOARD OF CANADA
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sos-2cto—lo-31 DEPARTMENTOFTHESEC
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• 6.1. Previous investigations 17
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-5-. and Kerr very much later menti
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treated as a quality, a special pop
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• -9-- per cent). Furthermore, th
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• - 11 - fishery, mentions the gr
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• - 13 - in LiepUva. These voyage
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• 1948/49 545 1949/50 730 1950/51
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• 2.2.1. River fishing - 16- The
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- 18- are 50 norsels, 60 to 80 cm l
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• nets give better results is onl
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• • G Fig. 4. End buoy for salm
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• with • Total length (cm) Mout
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• • - 25- of Bothnia. In the fa
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• • - 27- increase the catch. S
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• of • fishing representsavalue
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• to lower figures than in the fa
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• • Umfang = Cire umference - 3
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• - 35 - and nape corresponds to
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• • / 100 50 Selektion Selectio
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- 39 - In Table 9 have been calcula
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. Table 10. Number of salmon per 10
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• Table 11. Number of salmon per.
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• - 45 - cza-ci, es When consider
Page 51 and 52: - 47 - If We examine once more the
Page 53 and 54: - 49 - German fishermen work during
Page 55 and 56: • - 51 - is true, have to be corr
Page 57 and 58: Table 16. Seasonal yields of the fi
Page 59 and 60: Table 17. Monthly average weights o
Page 61 and 62: - 57 - In February and March hardly
Page 63 and 64: • Table 20. Additional catch of c
Page 65 and 66: • 100 50 60 100 cm Totallarle . 2
Page 67 and 68: • subject to an error of ± o.op9
Page 69 and 70: cycle) during the second . period o
Page 71 and 72: • their third year. , Recruitment
Page 73 and 74: 50 r-■ 2 / bet; 56cm = 1 fis 1 li
Page 75 and 76: • - 71 - ovary that has already b
Page 77 and 78: 5 - 73 - April 1960 the diameter of
Page 79 and 80: - 75 - oocytes can be demonstrated
Page 81 and 82: . ineftlerer Mean OocytendurcArness
Page 83 and 84: - 79 - furnish the energy fer the s
Page 85 and 86: ' 1741 salmon, which were.caught be
Page 87 and 88: • - 83- the series of measurement
Page 89 and 90: - 85 - the relative amount of eggs
Page 91 and 92: - 87 - The calculation of a formula
Page 93 and 94: - 89 - area of distribution is form
Page 95 and 96: - 91 - as percentages of thé recov
Page 97 and 98: Table 22. The recapture of tagged s
Page 99 and 100: • II> Three conclusions can be dr
Page 101: • 6 65- 64 - 62-. 61 - 6 . 5 . 59
Page 105 and 106: - 101 - tagging experiments'that sa
Page 107 and 108: - 103- Renne Bank in about 60 m dep
Page 109 and 110: • 9:1 0 a) el-4 o (XI -P CNI 4- o
Page 111 and 112: 14,3 14,3 30,7 31,3 27,7 6,0 15,0 1
Page 113 and 114: Table 26. Catches of salmon in the
Page 115 and 116: - 111 - between Hela and Kahlberg r
Page 117 and 118: • - 113- 5 .. Age and growth of t
Page 119 and 120: cm 100 80 60 40 - 1 15- customarily
Page 121 and 122: found can be used for the recalcula
Page 123 and 124: v 0 00 0 I I - 119- of the scales.
Page 125 and 126: - 121 - The interpretation of the y
Page 127 and 128: • - 1 23 - the age groups 2.B to
Page 129 and 130: • L s - L c r s 0.85 Smolt Ls = l
Page 131 and 132: 5.3. The'age composition of the Ger
Page 133 and 134: -129- with shares in the catch of o
Page 135 and 136: "ervoct. Yeer-Le- -e-t. '4.y-c.1*.e
Page 137 and 138: 1955 1 2 3 4 23 3 61 506 7 3 135 21
Page 139 and 140: - 135 - yeAy-ctt4 thé explanation
Page 141 and 142: • • _ Table 33. The composition
Page 143 and 144: Table 34. Composition by age of cat
Page 145 and 146: - 141 - yeAy-cle..es Table 35. The
Page 147 and 148: - 143 - • U7,) tdL comparablenece
Page 149 and 150: • whereas the present data .(1957
Page 151 and 152: Sin% 0,1 2,8 37,0 96,8 100,0 - 147-
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• - 149 - these results 38 per ce
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• • Number of salmon J. en1967
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4. number 50 e" • ); e e , lot nb
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they take account of the annual cha
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• -157- and in the stock are bein
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Table 43. Mean lengths of age group
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• - 161 - of these catches has be
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- 163 - of enolt in Fig. 36. From a
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--165 - increase'in weight is more
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• rl -P b..0 -e nzi -ri r-1 gl a)
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- 169 - CLA‘s set of smolt of 193
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Year's sets of smolt CILS present 7
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- 173 - necessary to follow the gro
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- 175 - • been ascertained from t
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(after K. A. Pyefinch 1955). — 17
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• gadids and sticklebacks (after
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- 181 - especially decisive in, the
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6.3.1. Seasonal fluctuations 36,9 2
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• Number of Months Gear salmon in
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MagerdW hing 40 , 20 Filling of Sto
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Deep could be examined. - 188 - Chr
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- 190 - salmon . switch over to the
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• - 192 - recognizable after seve
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- 194 - amount of food. Under-consi
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- 196- expenditure, composition in
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• - 1 98- the stock losses are co
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NUmber of salmon per Z Weigh- Seaso
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• 'Table 55. Values of the total
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- 204 experiment were about 40 per
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- 206- strength of the stock N pert
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• N„ Z o = cf„ (M1- T) -- In
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— 210— the coefficient for the
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- 212- In a further paper Piggins (
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- 214- shifted and the fOod supply
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- 216 - concerns the yield of captu
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nachafter 00 04 0,3 0,4 2 1 0,5 6 9
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• 1. (5 100 000) (4 250 000) 4 25
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• •em.ilts - 222 - in an error
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• - 224- BRANDT, A. y. , 1959: Fa
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- 226 - Paw, T. H., 1938: Fluctuati
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- 228- PETERSEN, C. G. .11, and Orr
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Table I. Captures per unit effort w
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Table II. Captures per unit effort
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• Yea.r Sweden Continuation Table
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Table VI. Ratio between fork le . B
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