Translation Series No.1211

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changes annually appears to follow this current, whereas others reach the Baltic Sea proper by way of the Ilandsea. The further course of the migration can no longer be followed on hand of currents. Whereas the salmon frOm the rivers Lule and Oulujoki'remain predominantly around Gotland, a very large part of the fish from the Indalsâlv move into the soUthern Baltic Sea. Beginning with the second year, spawning migrants can always be found during July/August in front of the home rivers. Nothing has been known hitherto about the sojourn in the Baltic Sea. It appeared possible that the fish, after leaving the Gulf of Bothnia, searched out immediately the final feeding grounds and remained there, or that they move continuously during feeding and that they have no definite feeding grounds. In the end an annual round through the eastern Baltic Sea until the spawning migration had been assumed. Table 22 gives a weak hint as regards these questions. If the salmon of the Indalsev remain during Lp. 282] their sojourn in the Baltic Sea proper on an average farther to the south than the fish from.the Gulf of Bothnia, then not all can make a circuit through the eastern Baltic Sea . or wander annually around Gotland. In other words, a map that shows the recovered salmon within a limited period in a definite distribution in the entire Baltic Seà proper, does not indicate that every one of these salmon must have visited during its sojourn the various regions of the area occupied by the population. Even if a rather far flung migration is carried out; it is not to be assumed that those salmon who lived in the extreme south had been previously frequently in the far north or had moved there. This does not exclude, of course, that individual fish do not make lengthy wanderings. . A feW results of my own tagging experiments support this assump- 'tion (Fig.'24 a'to c). In November 1960 15 salmon Were tagged near Bornholm,
Table 22. The recapture of tagged salmon in three differént.regions (north of 59 °N, 56 ° to 59 ° N, south of 56 ° N) as percentage of the total catch in all regions.- (Recalculated after B. Carlin 1959 a, 1963; E. Reline 1961)1. Home river . Indalsâlv Luleglv . Oulojoki Age group Months - - 1954 1959 1959 1959 • 59 ° 56-59 (,) 59 ° 59 ° 5 6-59 ° 56° - 59 ° 56-59 0 56° 59 0 56+59° 56 0 V-VI 100 100 . VII-VIII 100 0 86 14 A.0 IX-XII 25 SO 25 81 5 14 I-III 75 25 40 40 20 100 66 34 IV-VI 11 22 67 - 29 43 , 28 100. 100 A.1-A.3 VII-VIII 80 11 5 88 12 95 5 IX-XII 12 40 48 26 46 28 56 33 , 11 I-III 11 89 7 35 58 31 35 " 34 IV-VI 5 22 73 33 47 20 55 27 18 A.0 Total i 48 27 25 92 3 5 A.1 Total 14 20 66 26 • 46 28 58 28 14 47 35 18 A.2/A.3. Total 17 32 51 - 32 30 38 61 26 13 1 The percentage values of the sea year class A.0 are based on recaptures of 3 to 34, on an average of 12 salmon. The older classes are based on about 50 salmon.
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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
Page 45 and 46: . Table 10. Number of salmon per 10
Page 47 and 48: • Table 11. Number of salmon per.
Page 49 and 50: • - 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: - 91 - as percentages of thé recov
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 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
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- 143 - • U7,) tdL comparablenece
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• whereas the present data .(1957
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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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Translation Series No.1211

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