Translation Series No.1211

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were published by Eichelbaiim (1916). The results of his investigations •
are. ?till of importance today, because he reports about the nutrition
of the salmon during their first year in the sea. Twenty-nine emigrating
smolt (14 to 27 cm) had lived from March till May principally on flying
insects (Coleoptera, Diptera), besides on larvae of chironomids and gam-
marids and isopods. Another 22 amolt of a length of 14 to 21 cm that had
been caught in the sea .hetween May and October also contained Coleoptera,
Diptera and gammarids. Of exceptional importance is, however, the finding
that they had eaten in paxt'also Ammodytes. Some larger fish of a length -
of between 36 and 60 cm, mostly, however, 41 to 51 cm long, were caught
in March and April. Among the fish With stomach contents, 53 per cent had
eaten preponderantly Ammodytes, 24 per cent had eaten mainly Gammarus and
23 per cent had eaten Ammodytes as well as clupeids. •
Similar investigations have been carried out by Henking (1931)
on 134 salmon that had also been caught from 1914 to 1920 at the coast of
farther Pomerania..During the months of February to May no decisive changes •
were observed. In seven smolt of a length of 12 to 18 cm only flying in.,
. sects were found. Of the remaining 127 salmon (36 to 52 cm length) more
than 50 per cent had eaten Ammodytes (on an average 1.9 fish), 30 per cent
contained Gammarus (1.9 specimen), 24 per cent had remainS of fish, mostly
clupeids. Occasionally isopods and Crangon were found.
The latest investigations of the stomach contents of smolts in
-the Baltic Sea have . been made by Lindroth (1961b). The fish of a length
of 13 to 22 cm were caught from June to August along the Swedish oixIst in
the Bottensee. Almost all fish had eaten flying insects (300 to 500). One
gmolt, 20 cm long, contained a fish.
B. Dixon found in small'Eetic Sea salmon (mielnica) Ammodytes,