Translation Series No.1211

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• - 186- whereas the share was 70 per cent in September/October and even 88 pert cent in May/june. After this result we may ahmune that the share of salmon with empty stomachs gives an indication of the availability of food. Therefore all results will be correlated in the following investigation with the total number of the salmon examined. 6.3.2. Différences on the fishing grounds • Since the size of the weight of the stomach contents depends on the season, only such data can be used in the compaxison of different fishing grounds that take such facts into account. The data on hand orig- inate frOm the fishing grounds 4, ,5 and 6. From the fishing ground 4 data are available only for the months September (1962, 1963) and October (19 6 1, 1963). Data from the other two fishing grounds are very scarce as fax as they apply to the same months* and fishing periods. For this reason means [p. 340• have been'calculated froM the values of all years and their seasonal course is given in Fig. 39. The values from the fishing grounds 5 and 6 show good agreement from December to April. In contrast, the salmon-had in October 1957 near Bornholm more than twice the amount of food in their stomachs than had the fish'of the Danzig Deep. The values for October from the fishing ground 4 (Gotland) agree.well.with thoEe from Bornholm. • AlthoUgh it is not possible to obtain differences in the food weight of a salmon that are unambiguously dependent on the fishing ground, there are found certain variations in regard to the composition of the food on the individuar fishing grounds (Table 51). On.ths fishing ground 6 it is true that the sprat predominates in the food, but it is represented to a smiller extent than on the Danzig • Deep. It is also found that.Belone, Ammodvtes and even the mysids can form
MagerdW hing 40 , 20 Filling of Stomach •---,0 nelzgetarigene Lochs, netted salmon ci—Cr geongelle (ochre hooked salmon • • •,'" XI XII IV monae•Months Fig. 40. Pbod weight of salmon, caught in the Danzig Deep with line and net. - 187 a -
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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
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- 57 - In February and March hardly
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• Table 20. Additional catch of c
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• 100 50 60 100 cm Totallarle . 2
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• subject to an error of ± o.op9
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cycle) during the second . period o
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• their third year. , Recruitment
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50 r-■ 2 / bet; 56cm = 1 fis 1 li
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• - 71 - ovary that has already b
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5 - 73 - April 1960 the diameter of
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- 75 - oocytes can be demonstrated
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. ineftlerer Mean OocytendurcArness
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- 79 - furnish the energy fer the s
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' 1741 salmon, which were.caught be
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• - 83- the series of measurement
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- 85 - the relative amount of eggs
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- 87 - The calculation of a formula
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- 89 - area of distribution is form
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- 91 - as percentages of thé recov
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Table 22. The recapture of tagged s
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• II> Three conclusions can be dr
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• 6 65- 64 - 62-. 61 - 6 . 5 . 59
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• - 99 - fish. The tagging does n
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- 101 - tagging experiments'that sa
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- 103- Renne Bank in about 60 m dep
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• 9:1 0 a) el-4 o (XI -P CNI 4- o
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14,3 14,3 30,7 31,3 27,7 6,0 15,0 1
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Table 26. Catches of salmon in the
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- 111 - between Hela and Kahlberg r
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• - 113- 5 .. Age and growth of t
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cm 100 80 60 40 - 1 15- customarily
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found can be used for the recalcula
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v 0 00 0 I I - 119- of the scales.
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- 121 - The interpretation of the y
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• - 1 23 - the age groups 2.B to
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• L s - L c r s 0.85 Smolt Ls = l
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5.3. The'age composition of the Ger
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-129- with shares in the catch of o
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"ervoct. Yeer-Le- -e-t. '4.y-c.1*.e
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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
Page 163 and 164: Table 43. Mean lengths of age group
Page 165 and 166: • - 161 - of these catches has be
Page 167 and 168: - 163 - of enolt in Fig. 36. From a
Page 169 and 170: --165 - increase'in weight is more
Page 171 and 172: • rl -P b..0 -e nzi -ri r-1 gl a)
Page 173 and 174: - 169 - CLA‘s set of smolt of 193
Page 175 and 176: Year's sets of smolt CILS present 7
Page 177 and 178: - 173 - necessary to follow the gro
Page 179 and 180: - 175 - • been ascertained from t
Page 181 and 182: (after K. A. Pyefinch 1955). — 17
Page 183 and 184: • gadids and sticklebacks (after
Page 185 and 186: - 181 - especially decisive in, the
Page 187 and 188: 6.3.1. Seasonal fluctuations 36,9 2
Page 189: • Number of Months Gear salmon in
Page 193 and 194: Deep could be examined. - 188 - Chr
Page 195 and 196: - 190 - salmon . switch over to the
Page 197 and 198: • - 192 - recognizable after seve
Page 199 and 200: - 194 - amount of food. Under-consi
Page 201 and 202: - 196- expenditure, composition in
Page 203 and 204: • - 1 98- the stock losses are co
Page 205 and 206: NUmber of salmon per Z Weigh- Seaso
Page 207 and 208: • 'Table 55. Values of the total
Page 209 and 210: - 204 experiment were about 40 per
Page 211 and 212: - 206- strength of the stock N pert
Page 213 and 214: • N„ Z o = cf„ (M1- T) -- In
Page 215 and 216: — 210— the coefficient for the
Page 217 and 218: - 212- In a further paper Piggins (
Page 219 and 220: - 214- shifted and the fOod supply
Page 221 and 222: - 216 - concerns the yield of captu
Page 223 and 224: nachafter 00 04 0,3 0,4 2 1 0,5 6 9
Page 225 and 226: • 1. (5 100 000) (4 250 000) 4 25
Page 227 and 228: • •em.ilts - 222 - in an error
Page 229 and 230: • - 224- BRANDT, A. y. , 1959: Fa
Page 231 and 232: - 226 - Paw, T. H., 1938: Fluctuati
Page 233 and 234: - 228- PETERSEN, C. G. .11, and Orr
Page 235 and 236: Table I. Captures per unit effort w
Page 237 and 238: Table II. Captures per unit effort
Page 239 and 240: • Yea.r Sweden Continuation Table
Page 241 and 242:
Table VI. Ratio between fork le . B
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Translation Series No.1211

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