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Titolo:
Intra- and inter-specific competition and the reproductive success of sympatric Pacific salmon
Autore:
Essington, TE; Quinn, TP; Ewert, VE;
Indirizzi:
Univ Wisconsin, Ctr Limnol, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 in, Ctr Limnol, Madison, WI 53706 USA Univ Washington, Sch Fisheries, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 Sch Fisheries, Seattle, WA 98195 USA Fisheries & Oceans Canada, Weaver Creek Project, Agassiz, BC V0M 1A0, Canada Fisheries & Oceans Canada Agassiz BC Canada V0M 1A0 z, BC V0M 1A0, Canada
Titolo Testata:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
fascicolo: 1, volume: 57, anno: 2000,
pagine: 205 - 213
SICI:
0706-652X(200001)57:1<205:IAICAT>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERSPECIFIC COMPETITION; ONCORHYNCHUS-KISUTCH; SOCKEYE-SALMON; BROWN TROUT; BRITISH-COLUMBIA; SPAWNING HABITAT; FRASER-RIVER; BROOK TROUT; PINK SALMON; NEST DEPTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Essington, TE Univ Wisconsin, Ctr Limnol, 680 N Pk St, Madison, WI 53706 USA Univ Wisconsin 680 N Pk St Madison WI USA 53706 WI 53706 USA
Citazione:
T.E. Essington et al., "Intra- and inter-specific competition and the reproductive success of sympatric Pacific salmon", CAN J FISH, 57(1), 2000, pp. 205-213

Abstract

Individual female Pacific salmon fight for breeding space with conspecificand heterospecific females. We evaluated the consequences of this competition on the reproductive success of sockeye (Oncorhynchus nerka), chum (Oncorhynchus keta), and pink salmon (Oncorhynchus gorbuscha) in the Weaver Creek spawning channel, British Columbia. We hypothesized that differences in body size, relative abundance, and spawning date would influence the magnitude of interspecific interactions. Reproductive success (survival rate of eggs to emigrating fry) of the most abundant species, sockeye, was strongly and inversely correlated with conspecific abundance but not with the abundance of the other, less abundant species. Chum reproductive success was inversely correlated with sockeye abundance but not with the abundance of the scarce and smaller pink. Surprisingly, pink reproductive success was not correlated with sockeye abundance and only marginally correlated with chum abundance despite the fact that pink are smaller and spawn earlier than sockeye. Thus, intra- and inter-specific competition can substantially affect salmon reproductive success, but the magnitude of the competitive effects may depend on relative abundance, size, spawning date, and microhabitat preferences.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 23:02:48