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Titolo:
EPINEPHRINE, NOREPINEPHRINE, AND CORTISOL CONCENTRATIONS IN CANNULATED SEAWATER-ACCLIMATED RAINBOW-TROUT (ONCORHYNCHUS-MYKISS) FOLLOWING BLACK-BOX CONFINEMENT AND EPINEPHRINE INJECTION
Autore:
GAMPERL AK; VIJAYAN MM; BOUTILIER RG;
Indirizzi:
SIMON FRASER UNIV,DEPT BIOL SCI BURNABY V5A 1S6 BC CANADA DALHOUSIE UNIV,DEPT BIOL HALIFAX B3H 4J1 NS CANADA UNIV OTTAWA,DEPT BIOL OTTAWA K1N 6N5 ONTARIO CANADA UNIV CAMBRIDGE,DEPT ZOOL CAMBRIDGE CB2 3EJ ENGLAND
Titolo Testata:
Journal of Fish Biology
fascicolo: 2, volume: 45, anno: 1994,
pagine: 313 - 324
SICI:
0022-1112(1994)45:2<313:ENACCI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALMO-GAIRDNERI; CATECHOLAMINE RELEASE; HYPERCAPNIC ACIDOSIS; EXOGENOUS CATECHOLAMINES; ADRENERGIC RESPONSES; ANGUILLA-ANGUILLA; PLASMA-CLEARANCE; THYROID-HORMONE; EUROPEAN EEL; STRESS;
Keywords:
CONFINEMENT; CANNULATION; CORTISOL; CATECHOLAMINES; EPINEPHRINE; NOREPINEPHRINE; ONCORHYNCHUS-MYKISS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
A.K. Gamperl et al., "EPINEPHRINE, NOREPINEPHRINE, AND CORTISOL CONCENTRATIONS IN CANNULATED SEAWATER-ACCLIMATED RAINBOW-TROUT (ONCORHYNCHUS-MYKISS) FOLLOWING BLACK-BOX CONFINEMENT AND EPINEPHRINE INJECTION", Journal of Fish Biology, 45(2), 1994, pp. 313-324

Abstract

The present study investigates the effect of cannulation and chronic 'black-box' confinement, as well as epinephrine administration (4-0 mug kg-1), on the degree and time-course of alterations in trout (Oncorhynchus mykiss) catecholamine and cortisol concentrations. Plasma cortisol concentrations in seawater trout acclimated to 3-6-degrees-C reached 104 ng ml-1 1 day after cannulation/confinement and remained elevated above resting levels (8 ng ml-1) until 6 days post-confinement. Although plasma epinephrine and norepinephrine generally declined over the period of confinement (day 1 approx. 12 nm; day 7 approx. 6 nm), norepinephrine titres were usually higher and more variable. Epinephrine injection caused elevations in plasma epinephrine levels but not in norepinephrine levels; epinephrine titres reaching 107 +/- 26 nm (range 65-238 nM) at 2 min post-injection and returning to pre-injection levels by 30 min post-injection. Plasma cortisol increased by 20 ng ml-1 following epinephrine administration. Based on the time-course for post-confinement alterations in plasma cortisol, it appears that up to a week may be required before cannulated fish are completely acclimated to 'black-box' confinement. The findings suggest that meaningful results from experiments utilizing epinephrine injection and 'black-box' confinement are contingent upon: (1) knowledge of circulating epinephrinelevels shortly after injection (i.e. within 2 min post-injection); and (2) an experimental design that takes into account the elevated cortisol titres that are inherent with cannulation/confinement and epinephrine injection.

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Documento generato il 08/08/20 alle ore 09:05:40