Salinity Adaptations and Bathymetric Distribution of Bivalve Mollusks Portlandia arcticaand Nuculana pernula in the White Sea

Salinity Adaptations and Bathymetric Distribution of Bivalve Mollusks Portlandia arcticaand... We examined changes in the oxygen consumption rate, the number of active animals, rate of losses of salts, and the level of cell hydration under conditions of decreased salinity in the mollusks Portlandia arctica(Gray) and Nuculana pernula(O.F. Müller), inhabiting the White Sea in the deepest depths under high salinity (about 30‰) and negative temperatures of –1.3 to –1.4°C throughout the year. It has been shown that the mollusks demonstrate a relatively great tolerance of desalination at the organism level and a capability to regulate cell volume under decreased salinity of the environment. We concluded that the depletion of fauna of the White Sea in the deepest depths is not connected with the tolerance level of deep-sea animals to salinity fluctuations, but rather is due to environmental conditions (liquid silts and negative temperatures). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Salinity Adaptations and Bathymetric Distribution of Bivalve Mollusks Portlandia arcticaand Nuculana pernula in the White Sea

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Publisher
Springer Journals
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1012504731513
Publisher site
See Article on Publisher Site

Abstract

We examined changes in the oxygen consumption rate, the number of active animals, rate of losses of salts, and the level of cell hydration under conditions of decreased salinity in the mollusks Portlandia arctica(Gray) and Nuculana pernula(O.F. Müller), inhabiting the White Sea in the deepest depths under high salinity (about 30‰) and negative temperatures of –1.3 to –1.4°C throughout the year. It has been shown that the mollusks demonstrate a relatively great tolerance of desalination at the organism level and a capability to regulate cell volume under decreased salinity of the environment. We concluded that the depletion of fauna of the White Sea in the deepest depths is not connected with the tolerance level of deep-sea animals to salinity fluctuations, but rather is due to environmental conditions (liquid silts and negative temperatures).

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Oct 16, 2004

References

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