OXYGEN UPTAKE AND TRANSPORT IN THE PROSOBRANCH MOLLUSCBUSYCON CANALICULATUM(L.) II. INFLUENCE OF ACCLIMATION SALINITY AND TEMPERATURE

Autor:	Charlotte P. Mangum, Gregory Polites
Rok vydání:	1980
Předmět:	biology medicine.medical_treatment Oxygen transport Cooperativity Hemocyanin Oxygenation Busycon biology.organism_classification Acclimatization Salinity Botany medicine Biophysics General Agricultural and Biological Sciences Oxygenate
Zdroj:	The Biological Bulletin. 158:118-128
ISSN:	1939-8697 0006-3185
DOI:	10.2307/1540763
Popis:	1. The oxygen transport function of the blood in Busycon canaliculatum diminishes when either the ambient temperature or the ambient salinity is lowered.2. At low temperature the oxygen affinity of the hemocyanin increases sharply, and blood Po2 increases as well. Thus the blood cannot deoxygenate at the tissues.3. At low salinity oxygen affinity does not change appreciably, but the loss of Ca+2 and Mg+2 from the blood reduces the cooperativity of hemocyanin-oxygen binding, requiring a higher Po2 to achieve a given oxygenation state. Thus the blood does not oxygenate as highly at the gill, and total oxygen uptake decreases.
Databáze:	OpenAIRE
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