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Hydrobiological Journal
SJR: 0.227 SNIP: 0.901 CiteScore™: 0.5

ISSN Print: 0018-8166
ISSN Online: 1943-5991

Hydrobiological Journal

DOI: 10.1615/HydrobJ.v35.i4.40
pages 39-44

Light-dependent Changes in Physiological Indices and Behavior Activity of the Rainbow Trout Salmo irideus

V. N. Radchenko
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine
M. Yu. Aleyev
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine

ABSTRACT

Changes in secretory activity of the pineal organ resulting from the rainbow trout (Salmo irideus) exposition under different lighting regimes (L:D − 12:12; 24:0; 0:24) were analyzed as the mechanisms caused variations in skin pigmentation, leukocyte formula, rates of somatic growth, degree of gonad maturation, as well as in manifestation of schooling, and rheotaxis. These experiments have definitely shown the role of pineal organ in regulation of fish individual life cycle.


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