Das M74-Syndrom des Ostseelachses (Salmo salar): Symptome, Verbreitung und Ursachen.
Informationen für die Fischwirtschaft aus der Fischereiforschung, 46(1),
An overview is presented on the M74-Syndrome of Baltic salmon which is known since 1974 and which, since 1992, has caused considerable losses of artificially produced yolk-sac larvae in Swedish and Finnish hatcheries responsible for compensatory salmon stocking programmes. The syndrome only affects offspring of wild salmon ascending the rivers for spawning and not offspring derived from salmon broodstocks permanently kept in hatcheries. The syndrome seems to be restricted to the Baltic Sea where it has been
recorded in all of the remaining Swedish (except the
west coast) and Finnish salmon rivers as well as in populations of Estonian rivers and the Russian River
Neva. In Sweden and in Finland, the syndrome has been recorded in recent years in offspring of up to 80 % of female salmon used for spawning and resulted in a larval mortality of up to 90 %. A nutrition-associated thiamine (vitamin B1) deficiency is considered as primary cause. However, other environmental factors seem to be involved in addition. There is concern that the syndrome constitutes a major threat with respect to the survival of the few still naturally reproducing populations of Baltic salmon.
||Das M74-Syndrom des Ostseelachses (Salmo salar): Symptome, Verbreitung und Ursachen
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||Informationen für die Fischwirtschaft aus der Fischereiforschung
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||Bundesforschungsanstalt für Fischerei
||Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
||fish diseases; Baltic Sea; stock development; environmental conditions; Baltic salmon; Salmo salar
||07 May 2010 16:55
||27 Jun 2012 19:32
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