Translation Series No.1211

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gadids and sticklebacks (after K. Bahr 1936b).
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K. Bahr (1935b, 1936b) was -the first to report on the stomach
«content of large salmon in the sea: Among the fish investigated'were 139
salMon of lengths between 73 and 116 cm. He was able to demonstrate that
the changes in the composition of the food are related in the main to the
seasonal vertical movements of the sand eel and of the sprat. During Jan-
uary apd February the always pelagic stickleback was preponderant. With
the warming up of the surface water , sand . eel and sprat moved up into the
higher layers of water so that they can be captured by the salmon. Numers
ically the stickleback was most common and was also most often eaten by
the salmon.
This result that is very impressive on account of the causal
information, can, however, not be generalized and is not valid for all
fishing grounds in the Baltic Sea, as could be demonstrated by Christensen
(1961b) on hand of the hitherto most comprehensive material.(2100 salmon).
In general the sprat must probably considered to be the most important item
in the food during the entire year. They are followed by herring and stick,
leback. The sand eel is of greater importance only to the south and south-
east of Bornholm.'Netted salmon had larger stomach contents than the fish
caught,on hooks. He did not find any food differences dependent on size .
among the salmon of 60-cm to 95-cm length.
F. Chrzan. (1960) has examined 65 netted salmon in the spring of
1959 and 118 hooked salmon in the fall/winter of 1959 /60 from the Bay of
Danzig. He came to the conclusion that the clupeids are the Most important
food of the Salmon in every case. He thinks, however, that the herring
. might play a more important.role than the sprat. Trigger fish and sand .
eels follov behind the clupeids in regard to weight.
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