Feeding habits of juvenile sockeye salmon of different ages in the Kurile Lake pelagial (Kamchatka) on the data for 1967 and 1972-Reference-Cited by-同舟云学术

Feeding habits of juvenile sockeye salmon of different ages in the Kurile Lake pelagial (Kamchatka) on the data for 1967 and 1972

Published:2022-06-22 Issue:63 Volume: Page:59-72
ISSN:2782-6236
Container-title:The researches of the aquatic biological resources of Kamchatka and the North-West Part of the Pacific Ocean
language:
Short-container-title:Issledovaniâ vodnyh biologičeskih resursov Kamčatki i Severo-Zapadnoj časti Tihogo okeana

Author:

Nosova I. A.¹,Lepskaya E. V.¹

Affiliation:

1. Kamchatka Branch of Russian Research Institute of Fisheries and Oceanography (“KamchatNIRO”)

Abstract

A study was made of the nutrition of different-sized sockeye salmon underyearlings during the littoral feeding period in the summer-autumn period of 1972 on lake and river habitats. Diet of 2and 3-year-old sockeye salmon individuals sampled in pelagic zone was analyzed also. It was found, that permanent and dominating component in the diet of the age groups 0+, 1+ and 2+ of juvenile sockeye salmon in the littoral and pelagic zones of Kurile Lake was plankton crustacean Cyclops scutifer: up to 1700 individuals per one stomach, making 33.3–99.6% of the stomach content. Juvenile sockeye salmon were feeding on the cyclops of various ontogenetic stages, the bigger were juvenule sockeye salmon individuals, the higher was the part of large copepodids of late stages, mature individuals. The other components of the diet included larval chironomids, which role was maximum in feeding of underyearlings with the body length 26–30 mm, pupal chironomids and imago aerial insects. Index of fullness of the underyearling stomach in the samples from the lake littoral and composition of the forage spectra indicated that condition of feeding were different in different habitats.

Publisher

Kamchatka Research Institute of Fisheries and Oceanography

Reference10 articles.

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Cited by 2 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. The biomass of benthos on the littoral and spring spawning grounds of Kurile Lake in the period of low abundance of foraging juvenile sockeye salmon in 1974;The researches of the aquatic biological resources of Kamchatka and the North-West Part of the Pacific Ocean;2022-06-21

2. Plankton structure in the spawning grounds of the Kurile Lake sockeye salmon (based on matherials collected in 1974);The researches of the aquatic biological resources of Kamchatka and the North-West Part of the Pacific Ocean;2022-06-21