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Titolo:
The ability to feed in hypoxia follows a seasonally dependent pattern in shore crab Carcinus maenas
Autore:
Legeay, A; Massabuau, JC;
Indirizzi:
Univ Bordeaux 1, UMR 5805, Lab Ecophysiol & Ecotoxicol Syst Aquat, F-33120Arcachon, France Univ Bordeaux 1 Arcachon France F-33120 t Aquat, F-33120Arcachon, France CNRS, F-33120 Arcachon, France CNRS Arcachon France F-33120CNRS, F-33120 Arcachon, France
Titolo Testata:
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
fascicolo: 1, volume: 247, anno: 2000,
pagine: 113 - 129
SICI:
0022-0981(20000426)247:1<113:TATFIH>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ECTOCOMMENSAL GILL BARNACLE; OCTOLASMIS-MUELLERI; OXYGEN-AFFINITY; CARBON-DIOXIDE; ARTERIAL PO2; BLUE-CRAB; BLOOD;
Keywords:
oxygen; gill; biological rhythm; respiration; blood O-2 transport; feeding; metabolism; crustaceans; lactate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Massabuau, JC Univ Bordeaux 1, UMR 5805, Lab Ecophysiol & Ecotoxicol Syst Aquat, Pl Dr BPeyneau, F-33120 Arcachon, France Univ Bordeaux 1 Pl Dr B Peyneau Arcachon France F-33120 nce
Citazione:
A. Legeay e J.C. Massabuau, "The ability to feed in hypoxia follows a seasonally dependent pattern in shore crab Carcinus maenas", J EXP MAR B, 247(1), 2000, pp. 113-129

Abstract

The ability of the adult shore crab Carcinus maenas, native to the Bay of Arcachon (SW France), to feed in hypoxia was determined at various seasons. Crabs previously kept at field temperature were fed after a 5-day fasting period at 15 degrees C. Their blood oxygenation and pH regulation strategy and also their gill anatomy were analysed. From May to October, C. maenas feed at levels of O-2 partial pressure (p(O2)) in the water, pwO(2) = 2 kPa (1 mg l(-1)), without switching to their anaerobic metabolism. In March-April, before the main moulting period, the same food intake at pwO(2) = 4 kPainduced a systematic blood lactate increase associated with some mortality. An analysis performed at pwO(2) = 4 kPa at that time showed that in intermoult crabs the development of a coating of foreign material over the gill cuticle interfered with O-2-supply, preventing the small arterial p(O2) increases (from 0.7 to 1 kPa) which occurred at other seasons. This led to a cellular hypoxia despite a systematic postprandial blood-pH alkalinisation which favoured O-2-loading at gill level and increased arterial O-2 concentration. In March-April, alkalinisation appeared at pwO(2) values greater than or equal to 6 kPa and from May to at least July at pwO(2) greater than orequal to 2 kPa. Results are discussed in terms of season-related physiological performance, as hypoxic events mainly occur during the hot season. (C)2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 04:07:27