Climatic fluctuation influence on natural reproduction efficiency Pacific salmon Amur River Basin
2007
Vinogradov, V.V. | Zolotukhin, S.F. | Kaplanova, N.F.
The analysis for Sea of Okhotsk ice cover influence on Amur River chum juveniles quantity is presented. The fact of correctness of a test rivers choice to fall chum juveniles count for the characteristic of entire Amur River basin proves to be true. The maximum of fall chum quantity in 1995 has been caused by good survival rate of fall chum fry in the Amur River basin. Fluctuations in numerical values of summer and fall chum in spawning grounds of the Amur River basin are synchronously connected with long-term changes of index ALPI. Changes of a mid-annual water level in Amur River basin for the period 1984-1997 and numerical fluctuations of fall chum juveniles had close positive correlation dependence, and then this dependence has got opposite one. Amgun tributary gets at the present stage primary value in fall chum reproduction in Amur River basin
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