Translation Series No.1211

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the period from 1940 to '1962.
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The figures for the landings for the total salmon and sea trout
fishery show considerable fluctuations for the Baltic Sea and also for the
rivers (Tables III and Iv). For the Baltic Sea they rose from 250 t to
1330 t during the 20 years from 1913 to 1932. The most astonishing phen-
omenon is, however, the sudden growth of the fishery after the Second World
War to a total of 4000 t, which finds expression also in the rivers (700 t).
The average yield for the years 1957 to 1962 amounted to 2675- t.
Of this about 275 t were caught in the rivers. The shore.fishery (Sweden,
Finland, SSSR, Poland) yielded about 600 t and the pelagic fishery 1800 t
or 440,000 fish. This corresponds to a percentage of 67 per cent of the
total yield. 'These catches were composed of 1500 to 1600 t Atlantic salmon
and 200 to 300 t sea trout.
Lp. 2581
. The pelagic fishery (Denmark, Germany, Poland,Sweden) is res-
tricted substantially to the main basin of the Baltic Sea (fishing grounds
3, 4, 5, 6), but it has been extended recently during the fall months into
the Gulf of Bothnia (fishing ground 2, Fig. 6).
Since the fishing in the ocean is carried out preponderantly
from fall to sprink, the seasonal yields are of special interest (Table 16).
They show still greater fluctuations than the figures that relate to the
calendar year. This is caused by the fact that the seasonal yields are
affected especially by the fluctuations in the stock. At the beginning of
the fishing season the salmon, which spend their second year in the Baltic
Sea, are just entering the exploited phase..They form, together with the
fish that are one year older, the main bulk of the catches. Towards the •
.end of the seaèon, in April/May of the following year, the large fish
'begin their spanning migration. This is the beginning of the rejuvenation •