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Titolo:
Contrasting seasonal modulation of the stress response in male and female rainbow trout
Autore:
Pottinger, TG; Carrick, TR;
Indirizzi:
NERC Inst Freshwater Ecol, Windermere Lab, Ambleside LA22 0LP, Cumbria, England NERC Inst Freshwater Ecol Ambleside Cumbria England LA22 0LP ria, England
Titolo Testata:
JOURNAL OF FISH BIOLOGY
fascicolo: 3, volume: 56, anno: 2000,
pagine: 667 - 675
SICI:
0022-1112(200003)56:3<667:CSMOTS>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALMO-TRUTTA-L; PITUITARY-INTERRENAL AXIS; BROWN TROUT; ONCORHYNCHUS-MYKISS; SEXUAL-MATURATION; PLASMA-CORTISOL; ADRENAL AXIS; RAT; 11-KETOTESTOSTERONE; CORTICOSTERONE;
Keywords:
stress; cortisol; androgen; estrogen; rainbow trout; sexual maturity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Pottinger, TG NERC Inst Freshwater Ecol, Windermere Lab, Ferry House,Far Sawrey, Ambleside LA22 0LP, Cumbria, England NERC Inst Freshwater Ecol FerryHouse,Far Sawrey Ambleside Cumbria England LA22 0LP
Citazione:
T.G. Pottinger e T.R. Carrick, "Contrasting seasonal modulation of the stress response in male and female rainbow trout", J FISH BIOL, 56(3), 2000, pp. 667-675

Abstract

Between June and September the magnitude of the plasma cortisol response of maturing male and female rainbow trout to confinement was indistinguishable. A progressive increase in confinement-induced cortisol levels in both sexes occurred during May to September, associated with the seasonal rise inwater temperature. Between September and January a reduction of >50% in the magnitude of the cortisol response to confinement in male fish (but no decline in females) coincided with declining water temperature and significant increases in plasma 11-kelotestosterone and elevated plasma testosterone levels. Plasma oestradiol-17 beta levels were significantly greater in females than males throughout the study period and this difference was maximal between September and January. However, plasma testosterone was also elevated in females during this period and levels overall were higher than those in male fish. previous studies have shown oestradiol-17 beta and testosterone to hair diametrically opposed effects on stress responsiveness in trout,with the former enhancing, and the latter suppressing, the cortisol response to a stressor. The relative roles of androgens, estrogen and water temperature in modulating the stress responsiveness of rainbow trout are discussed. (C) 2000 Fisheries Society of the British Isles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:29:07