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Hydrobiological Journal
SJR: 0.227 SNIP: 0.575 CiteScore™: 0.24

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

Hydrobiological Journal

DOI: 10.1615/HydrobJ.v35.i5.140
pages 115-127

The Comparative Characteristic of Lipid Composition and Motor Activity of the Calanus euxinus (Copepoda) Ecogroup during Diapause

T. V. Yuneva
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine
L. S. Svetlichniy
Institute of Biology of the Southern Seas National Academy of Sciences of Ukraine Sevastopol, Ukraine
A. M. Shchepkina
Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine, Sevastopol, Ukraine

ABSTRACT

Motor activity, content and composition of total lipids, phospholipids, fatty acids of triacylglycerides, waxes, and phospholipids of diapausing groups of Calanus euxinus V-copepodites from the Black Sea redox-zone have been investigated.
It has been shown that diapausing V-copepodites had 1.5 times lower activity and 2−2.5 times higher fatness as compared with V-copepodites and adult Calanus which daily migrated from the depth to the surface. The lipid increasing in diapausing V-copepodites was at the expense of reserved lipids, mainly waxes, and to a lesser extent at the expense of structural lipids, phospholipids, and sterols. Alteration in qualitative content of phospholipids, increase of concentration of the plasmalogen form of phosphatidylcholine, phosphatidylserine, phosphatidylinositol and docosahexaenic acid (22:63) are determined by life conditions in the zone of low oxygen concentration.
The role of endogenous and exogenous factors in forming Calanus ecogroups in the Black Sea is discussed.


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