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Titolo:
THE STRESS-RESPONSE AND THE PLASMA DISAPPEARANCE OF CORTICOSTEROID AND GLUCOSE IN A MARINE TELEOST, THE SEA RAVEN
Autore:
VIJAYAN MM; MOON TW;
Indirizzi:
EVS ENVIRONM CONSULTANTS,195 PEMBERTON AVE N VANCOUVER V7P 2R4 BC CANADA HUNTSMAN MARINE SCI CTR ST ANDREWS E0G 2X0 NB CANADA UNIV OTTAWA,OTTAWA CARLETON INST BIOL,DEPT BIOL OTTAWA K1N 6N5 ON CANADA
Titolo Testata:
Canadian journal of zoology
fascicolo: 3, volume: 72, anno: 1994,
pagine: 379 - 386
SICI:
0008-4301(1994)72:3<379:TSATPD>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT ONCORHYNCHUS-MYKISS; PLEURONECTES-PLATESSA L; RAINBOW-TROUT; SALVELINUS-FONTINALIS; SALMO-GAIRDNERI; COHO SALMON; HEMITRIPTERUS-AMERICANUS; BROOK CHARR; CORTISOL; METABOLISM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
M.M. Vijayan e T.W. Moon, "THE STRESS-RESPONSE AND THE PLASMA DISAPPEARANCE OF CORTICOSTEROID AND GLUCOSE IN A MARINE TELEOST, THE SEA RAVEN", Canadian journal of zoology, 72(3), 1994, pp. 379-386

Abstract

The objective of the study was to examine the physiological response to stress in a marine species with a sluggish life-style. The sea raven (Hemitripterus americanus), a marine benthic predator, did not produce elevated catecholamine levels when handled for blood removal, whichfacilitated repeated blood sampling from the same fish without cannulation. However, this species did release catecholamines in response toan acute stress (1 min of air exposure followed by 1 min of chasing),suggesting a high threshold (degree of external stimulation) for catecholamine release in this species. Plasma cortisol concentration increased significantly only after 1 h and remained elevated 4 h post-stress, showing a delayed response compared with salmonids. Plasma glucose concentration increased significantly at 0.5 h post-stress and remained elevated even at 24 h, while lactate levels dropped between 4 and 24h post-stress. The delayed cortisol increase may not be due to altered plasma clearance, as no change in the plasma disappearance or tissueuptake of cortisol-derived radioactivity occurred with confinement stress in this species. Also, confinement stress did not alter the plasma disappearance or tissue uptake of radioactivity derived from glucose, indicating a higher production of glucose during stress. Food deprivation significantly increased the plasma disappearance and tissue uptake of both cortisol- and glucose-derived radioactivity in the sea raven. These results indicate that the hormonal response to stress in the sea raven is different from that of salmonids. This altered response may be an adaptation to prevent excess energy mobilization in a specieswith an inactive life-style and low metabolic activity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 12:09:47