Survival of naturally spawned stellate sturgeon fry during downstream migration in the Volga river

Survival of naturally spawned stellate sturgeon fry during downstream migration in the Volga river ISSN 10674136, Russian Journal of Ecology, 2009, Vol. 40, No. 5, pp. 374–376. © Pleiades Publishing, Ltd., 2009. Original Russian Text © T.V. Usova, 2009, published in Ekologiya, 2009, No. 5, pp. 396–398. Survival of Naturally Spawned Stellate Sturgeon Fry during Downstream Migration in the Volga River T. V. Usova Caspian Research Institute of Fisheries, ul. Savushkina 1, Astrakhan, 414056 Russia; email: Received July 10, 2008 Key words: sturgeon, prelarvae, fingerlings, survival, morphological developmental abnormalities. DOI: 10.1134/S1067413609050117 The initial abundance of new fish generations 132.3 km ), this rate reached 0.69%; in mediumwater depends on a number of factors. Prior to river flow reg years (104.2 km ), 1.0%; and in the lowwater year ulation in the Volga, abiotic factors played the main 1996 (61.1 km ), 0.1%. The survival rate in the period role in this respect. Subsequently, especially in the from prelarva (up to 5 days of development) to finger 1980s and 1990s, the impact of numerous anthropo ling was 2.5%, varying from 1.0% in highwater years genic factors has caused disturbances in the structure to 1.9% in mediumwater years and to 0.1% in low and normal functioning of aquatic biocenoses and water years. This is Russian Journal of Ecology Springer Journals

Survival of naturally spawned stellate sturgeon fry during downstream migration in the Volga river

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SP MAIK Nauka/Interperiodica
Copyright © 2009 by Pleiades Publishing, Ltd.
Life Sciences; Environment, general; Ecology
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