Etude experimentale preliminaire sur les echanges gazeux chez Pinna nobilis
Breathing exchanges of Pinna nobilis L. are studied in situ and in the laboratory with two methods. First method consist in introducing samples of Pinna under a 40l plexiglass bell equipped with haps. The bell is positionned by diving. The consumption of oxygen is observed with water samples and the oxygen concentration is measured with an electronic oxymeter. Experiments which are carried out during nycthemeral cycles are reproduced in the laboratory with the same type of bell. A second method carry into effect an apparatus more sophisticated, who put into circulation a current of water in an airtight thermostated cellule, where a specimen of young Pinna is introduced. This sample is gradually adaptated to the conditions of the medium. Breathing phenomenon are studied lapses of time shorter, making variations of temperature. Both complementary methods show that the standard metabolism of this big bivalves is too less by comparison with other bivalves (oyster, clam), and that the consumption of oxygen increases with temperature.
Auteurs du document :
Vicente, N, Riva, A, Butler, A
Obtenir le document :
Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1991