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Some data on the reproduction of sturgeons and on their utilization of Ural River spawning grounds Biological bases of Central Asian and Kazakhstan fisheries



Some data on the reproduction of sturgeons and on their utilization of Ural River spawning grounds Biological bases of Central Asian and Kazakhstan fisheries



Some data on the reproduction of sturgeons and on their utilization of Ural River spawning grounds Biological bases of Central Asian and Kazakhstan fisheries Nekotorye dannye po razmnozheniyu osetrovykh i ispol'zovaniyu imi nerestilishch reki Ural Biologicheskie osnovy rybnogo khozyaistva na vodoemak Srednei Azii i Kazakhstana Biological bases of Central Asian and Kazakhstan fisheries 46-69



The extent of the spawning zone has been estimated at 800 km. The areas of the spawning beds depend on the water content of the river. Hiemal biological sturgeon groups spawn in the upper section the spawning zone, mainly on temporarily flooded banks. Vernal groups spawn on midstream beds which are constantly under water. Hiemal sturgeon spawn at a lower temperature than vernal groups. The breeding period of hiemal sturgeon is not long and coincides with the peak of the flood period. The spawning of the vernal form is protracted and coincides with the beginning of the flood period.

Accession: 025479011

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