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

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

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v50.i3.60
pages 55-63

Resistance of Gammarids Pontogammarus robustoides and Chaetogammarus ischnus (Crustacea: Amphipoda) to Elevation of Temperature of the Aquatic Medium

V. D. Romanenko
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
Yu. G. Krot
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
T. I. Lekontseva
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
A. B. Podrugina
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine

ABSTRAKT

Temperature resistance of the laboratory and natural populations of Pontogammarus robustoides (Sars, 1894) and Chaetogammarus ischnus (Stebbing, 1898) to increased temperatures of the aquatic medium was studied. Thermostability degree was estimated at static and dynamic impact. In both modes P. robustoides was revealed to be more resistant than Ch. Ischnus. Peculiarities of the gammarids' thermostability changes depending on preceding temperature were shown. During prolong adaptation to the narrow range of elevated temperatures (19−25°C) thermostability of Ch. Ischnus increased; adaptation abilities of P. robustoides decreased at the static impact of extreme temperatures. Intraspecific differentiation of individuals by thermostability degree and adaptation ability was shown.


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