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Titolo:
Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout
Autore:
Sloman, KA; Metcalfe, NB; Taylor, AC; Gilmour, KM;
Indirizzi:
Univ Glasgow, Inst Biomed & Life Sci, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ ow G12 8QQ, Lanark, Scotland
Titolo Testata:
PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY
fascicolo: 3, volume: 74, anno: 2001,
pagine: 383 - 389
SICI:
1522-2152(200105/06)74:3<383:PCCBAA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIFE-HISTORY STRATEGIES; SALVELINUS-ALPINUS L; ATLANTIC SALMON; ARCTIC-CHARR; ONCORHYNCHUS-MYKISS; BRAIN MONOAMINES; HORMONE LEVELS; BODY-SIZE; DOMINANCE; BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Metcalfe, NB Univ Glasgow, Inst Biomed & Life Sci, Graham Kerr Bldg, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Graham Kerr Bldg Glasgow Lanark Scotland G12 8QQ
Citazione:
K.A. Sloman et al., "Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout", PHYSIOL B Z, 74(3), 2001, pp. 383-389

Abstract

Two related experiments examined the relationship between plasma cortisol concentrations and the development of social hierarchies in fish. In the first, rainbow trout, Oncorhynchus mykiss, and brown trout, Salmo trutta, were observed for dominance interactions when confined within single-species pairs for 4, 48, or 168 h. Subordinate members of a pair exhibited significantly higher cortisol concentrations than dominant and single fish, but the pattern of cortisol elevation differed between the two species, being quicker to rise and increasing to a higher level in rainbow trout. Cortisol concentrations were correlated with behavioural measurements; the more subordinate the behaviour exhibited by a fish, the higher its cortisol concentration. Social stress was a chronic stressor, and no acclimation to social status occurred during the week. In the second experiment, measurements of plasma cortisol were made before pairing of rainbow trout and then after 48 h ofconfinement in pairs. Subordinate fish demonstrated significantly higher concentrations of plasma cortisol both before and after social stress. It therefore appears that in addition to cortisol being elevated during periods of social stress, an association may exist between initial cortisol levels and the likelihood of a fish becoming subordinate.

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Documento generato il 11/07/20 alle ore 19:42:56