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Titolo:
Growth and survival of Alaska stream-type Chinook salmon cultured in estuarine net-pens or freshwater raceways
Autore:
Martin, RM; Wertheimer, AC; Thrower, F; Joyce, JE;
Indirizzi:
Natl Marine Fisheries Serv, Auke Bay Lab, Alaska Fisheries Sci Ctr, Juneau, AK 99801 USA Natl Marine Fisheries Serv Juneau AK USA 99801 Ctr, Juneau, AK 99801 USA
Titolo Testata:
NORTH AMERICAN JOURNAL OF AQUACULTURE
fascicolo: 3, volume: 63, anno: 2001,
pagine: 256 - 261
SICI:
1522-2055(200107)63:3<256:GASOAS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
COHO SALMON; ONCORHYNCHUS-KISUTCH; MARINE SURVIVAL; SIZE; RELEASE; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Wertheimer, AC Natl Marine Fisheries Serv, Auke Bay Lab, Alaska Fisheries Sci Ctr, 11305 Glacier Highway, Juneau, AK 99801 USA Natl Marine Fisheries Serv 11305 Glacier Highway Juneau AK USA 99801
Citazione:
R.M. Martin et al., "Growth and survival of Alaska stream-type Chinook salmon cultured in estuarine net-pens or freshwater raceways", N AM J AQUA, 63(3), 2001, pp. 256-261

Abstract

The overwinter survival and growth and the subsequent marine survival of stream-type chinook salmon Oncorhynchus tshawytscha were compared between fish cultured in marine net-pens and their siblings cultured in freshwater. The net-pens were suspended in a stratified estuary with a low-salinity lens; the lens provided osmotic relief to the fish, and its depth and salinity varied seasonally. The median overwinter survival for chinook salmon from six brood years was 89.1% for the net-pen groups, significantly (P = 0.009) less than the median survival of 99.0% in freshwater. The median overwintergrowth rate was 0.5% of body weight/d for the net-pen groups, significantly (P = 0.013) higher than the median growth rate of 0.2% for freshwater groups. The median marine survival of smolts from net-pen and freshwater groups was similar, 5.6% and 5.3%, respectively. These results demonstrate that juvenile stream-type chinook salmon can be cultured successfully over winter from the subyearling to smolt stage in marine net-pens suspended in a highly stratified estuary but that overwinter survival will be lower than in freshwater raceways.

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Documento generato il 18/02/20 alle ore 05:27:14