Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Behavioural and heart rate responses to predation risk in wild and domesticated Atlantic salmon
Autore:
Johnsson, JI; Hojesjo, J; Fleming, IA;
Indirizzi:
Univ Gothenburg, Dept Zool, SE-40530 Gothenburg, Sweden Univ Gothenburg Gothenburg Sweden SE-40530 , SE-40530 Gothenburg, Sweden Norwegian Inst Nat Res, N-7004 Trondheim, Norway Norwegian Inst Nat Res Trondheim Norway N-7004 N-7004 Trondheim, Norway
Titolo Testata:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
fascicolo: 4, volume: 58, anno: 2001,
pagine: 788 - 794
SICI:
0706-652X(200104)58:4<788:BAHRRT>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONCORHYNCHUS-MYKISS; GENETIC-DIVERGENCE; RAINBOW-TROUT; BROWN TROUT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Johnsson, JI Univ Gothenburg, Dept Zool, Medicinaregatan 18,Box 463, SE-40530 Gothenburg, Sweden Univ Gothenburg Medicinaregatan 18,Box 463 Gothenburg Sweden SE-40530
Citazione:
J.I. Johnsson et al., "Behavioural and heart rate responses to predation risk in wild and domesticated Atlantic salmon", CAN J FISH, 58(4), 2001, pp. 788-794

Abstract

Artificial culture may relax the selective pressures from predators, thereby altering behavioural and heart rate responses to predation risk. Culturemay also impose new selection that adapts fish to confinement. Predictionsfrom these hypotheses were tested by comparing seventh-generation farm Atlantic salmon (Salmo salar) with wild Atlantic salmon from the principal founder population of the farm strain. Wild age 1+ salmon had higher standard heart rates and showed a more pronounced flight and heart rate response to a simulated predator attack than did farmed salmon. However, wild fish werecloser to the model predator at attack, which may have accentuated these differences. Both strains habituated to the threat, showing less response tothe second attack than to the first. In contrast with age 1+ fish, wild age 2+ salmon had lower standard heart rates than farmed fish. Moreover, in age 2+ salmon, domestication effects were less clear and the response to predation threat considerably weaker, suggesting that environmental effects ofculture override genetic effects as time in captivity increases. Domestication selection may thus alter reaction norms of farmed animals over environmental gradients and time. This should be considered when attempting to predict the consequences of release or escape of domesticated animals in the wild.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 13:22:02