Variation in smoltification age and its determinants in sockeye salmon of Lake Azabach’e

Variation in smoltification age and its determinants in sockeye salmon of Lake Azabach’e

In this paper, we analyze scale samples of sexually mature sockeye salmon from Lake Azabach'e collected over many years and data on the abundance of zooplankton in this lake. For native juvenile sockeye salmon, the major limiting factor of growth and smoltification is food availability. During...

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Bibliographic Details
Published in:Russian journal of marine biology Vol. 26; no. 3; pp. 194 - 199
Main Authors: Kovalev, M. Yu, Rzhannikova, L. A., Karpenko, A. I.
Format: Journal Article
Language:English
Published: New York Springer Nature B.V 2000
Subjects:
Biological fertilization
Carnivorous animals
Catadromous migrations
Fertilization
Food availability
Food supply
Freshwater
Freshwater fishes
Juveniles
Lakes
Limiting factors
Oncorhynchus nerka
Plankton
Salmon
Smolts
Zooplankton
Russia, Kamchatskaya, Azabach'e L
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Summary:In this paper, we analyze scale samples of sexually mature sockeye salmon from Lake Azabach'e collected over many years and data on the abundance of zooplankton in this lake. For native juvenile sockeye salmon, the major limiting factor of growth and smoltification is food availability. During the observation period from 1977 to 1993, two-year-olds were the most numerous group among the downstream-migrating sockeye salmon. Short-term fluctuations in the proportion of one-year-old smolts during downstream migration are attributed to outbreaks of plankton due to the natural fertilization of the lake.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1063-0740
1608-3377
DOI:10.1007/BF02759538