Translation Series No.1211

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• - 108- This cause certainly must have affected the catches on the Mittelbank in April 1963. There the best catches were made in depths of 20 to 30 m. The salmon could even take up hottom-dwelling food animals. According to the statements by the fishermen they had eaten besides sticklebacks also sprat and small crustaceans (Table 27). Table 27. Salmon fishery in April As a final example will be 1963 on the southern Mittelbank. discussed the catches in the Danzig Apr. Number Aver. Salmon Bay of February/March 1964 (Table 28). of Wind depth per 1963 cutters m 100mets- In contrast to the previous examples 18. 19. 20. 21. 22. 1 7 8 6 4 umlf. 19 unilf. 28 NO 2 .„„,_28 25 turtIClableo 23,2 26,2 13,7 8,0 3,9 no exceptionally large catches were made there,.It was, however, possible to ascertain all attendant circum- . stances. During the entire period there were no fundamental changes in the wind conditions. The water was flowing continuously towards the south-southwest, as was shtwn by the anchored . cutters. Until February 28 the average yields were rather uniform at about 3.3 to 4.5 salmon per 100 nets. Afterwards the catches increased and yielded on an average between 13.9 and 17.5 salmon per 100 nets from March 2 to 4, • [p. 293] only to diminish again later. The fish had eaten mostly benthic.amphipods and sticklebacks. Because the fish become often badly tangled in the net it is difficult to determine from which side each salmon has approached the net. In this case there appeared to have been no preference for one side of the net, so that no direction of movement could be inferred. , The available data give a picture that is entirely different from the.previous examples. The yields do not jump up suddenly, but increase slowly. Good.catches are made not only on a single day, but per-. sist for some time. With uniform current conditions and hardly changing
Table 26. Catches of salmon in the Danzig Bay, NNW of Kàhlberg, 45 to 82 m water depth, current WSW. February 19 64 March 19 64 24 25 26 27 28 29 1 2 3 4 5 Total Number of vessels 11 10 13 12 10 13 12 12 12 14 14 Wind S03 S03 S03 SOS S4 SO 2 0 2 01 W3 W3 N4 Salmon/100 nets 3,8 4,5 3,3 3,5 3,9 7,9 9,3 15,8 13,9 17,5 8,5 Tot. no. of salmon 136 151 138 134 145 338 390 689 604 682 435 3841 Tot. no. of salmon 704 338 279-i 3841 Date Date Table 29. Food of salmon, March 1964,'Danzig Bay. Number of salmon Food per salmon examined with food MYsids Sticklebacks Clupeids Fish Ammodytes Reeds Number Number Number Number I. 3. 21 4 1,0 0,3 0,3 2. 3. 75 16 0,5 1,0 0,4 0,1 3.3. 54 9 4,5 0,7 4. 3. 38 16 • 3,0 0,6 5. 3. 26 6 • 1,0 1,5 0,2 0,2 o %JD
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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
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- 47 - If We examine once more the
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- 49 - German fishermen work during
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• - 51 - is true, have to be corr
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Table 16. Seasonal yields of the fi
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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 and 102: • 6 65- 64 - 62-. 61 - 6 . 5 . 59
Page 103 and 104: • - 99 - fish. The tagging does n
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: 14,3 14,3 30,7 31,3 27,7 6,0 15,0 1
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-
Page 153 and 154: • - 149 - these results 38 per ce
Page 155 and 156: • • Number of salmon J. en1967
Page 157 and 158: 4. number 50 e" • ); e e , lot nb
Page 159 and 160: they take account of the annual cha
Page 161 and 162: • -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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Translation Series No.1211

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