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).
Russian Journal of Marine Biology – Springer Journals
Published: Oct 16, 2004
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