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Titolo:
Stress-induced catecholamine changes in the hemolymph of the oyster Crassostrea gigas
Autore:
Lacoste, A; Malham, SK; Cueff, A; Poulet, SA;
Indirizzi:
Univ Paris 06, INSU, CNRS, Stn Biol Roscoff, F-29682 Roscoff, France Univ Paris 06 Roscoff France F-29682 ol Roscoff, F-29682 Roscoff, France
Titolo Testata:
GENERAL AND COMPARATIVE ENDOCRINOLOGY
fascicolo: 2, volume: 122, anno: 2001,
pagine: 181 - 188
SICI:
0016-6480(200105)122:2<181:SCCITH>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL-NERVOUS-SYSTEM; FRESH-WATER SNAIL; LYMNAEA-STAGNALIS; BIOGENIC-AMINES; PLACOPECTEN-MAGELLANICUS; LIQUID-CHROMATOGRAPHY; BIOMPHALARIA-GLABRATA; HELIX-ASPERSA; POND SNAIL; MONOAMINES;
Keywords:
Crassostrea gigas; mollusc; catecholamines; noradrenaline; dopamine; stress;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Lacoste, A Univ Paris 06, INSU, CNRS, Stn Biol Roscoff, Pl Georges Teissier,BP 74, F-29682 Roscoff, France Univ Paris 06 Pl Georges Teissier,BP 74 Roscoff France F-29682
Citazione:
A. Lacoste et al., "Stress-induced catecholamine changes in the hemolymph of the oyster Crassostrea gigas", GEN C ENDOC, 122(2), 2001, pp. 181-188

Abstract

The stress response is a series of coordinated physiological reactions increasing an organism's capacity to maintain homeostasis in the presence of threatening agents. This fundamental process is known to involve hormonal signaling to rapidly modulate key physiological functions in vertebrates, butdata are lacking concerning neuroendocrine responses to stress in invertebrates. The present study examined circulating catecholamine (CA) responses to stress in oysters. Mechanical disturbances (consisting of shaking the animals) and temperature or salinity variations were applied to the animals because these three types of stressors are commonly encountered by oysters in aquaculture or in their natural habitat. Results show that both circulating noradrenaline (NA) and dopamine (DA) concentrations increased in response to stress. The catecholaminergic response to acute mechanical stressors was rapid (less than 5 min), transient (a return to basal CA levels was observed after 60-90 min), and reflected both the intensity and duration of theper turbation. In contrast, responses to temperature and salinity variations were long lasting (up to 72 h). CA concentrations varied from 1.61 +/- 0.30 ng NA/mL and 0.41 +/- 0.05 ng DA/ml to maximal values of 22.07 +/- 0.97ng NA/ml and 2.24 +/- 0.19 ng DA/ml. Such CA concentrations are known to induce physiological responses in bivalves, suggesting that stress-induced NA and DA changes exert a regulatory function in oysters. (C) 2001 Academic Press.

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Documento generato il 08/08/20 alle ore 08:59:17