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Titolo:
Effect of entry timing and salinity on overwinter growth of sockeye salmonfry in seawater
Autore:
Moles, A; Scott, R;
Indirizzi:
Natl Marine Fisheries Serv, Auke Bay Fisheries Lab, Juneau, AK 99801 USA Natl Marine Fisheries Serv Juneau AK USA 99801 Lab, Juneau, AK 99801 USA Alaska Dept Fish & Game, Juneau, AK 99801 USA Alaska Dept Fish & Game Juneau AK USA 99801 & Game, Juneau, AK 99801 USA
Titolo Testata:
NORTH AMERICAN JOURNAL OF AQUACULTURE
fascicolo: 3, volume: 63, anno: 2001,
pagine: 222 - 228
SICI:
1522-2055(200107)63:3<222:EOETAS>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONCORHYNCHUS-NERKA; FRESH-WATER; NET-PENS; SURVIVAL; SALAR; SMOLTIFICATION; ADAPTATION; KISUTCH; HORMONE; STOCKS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Moles, A Natl Marine Fisheries Serv, Auke Bay Fisheries Lab, 11305 GlacierHighway,Juneau, AK 99801 USA Natl Marine Fisheries Serv 11305 Glacier Highway Juneau AK USA 99801
Citazione:
A. Moles e R. Scott, "Effect of entry timing and salinity on overwinter growth of sockeye salmonfry in seawater", N AM J AQUA, 63(3), 2001, pp. 222-228

Abstract

Groups of sockeye salmon Oncorhynchus nerka (approximately 2 g in weight) were introduced into seawater tanks at three distinct times, 3 weeks beforethe fall equinox, at the equinox, and 3 weeks after the equinox. All groups were reared for 8 months (September-May) in those tanks to determine the relative effects of seawater entry timing and salinity (20 parts per thousand and 30 parts per thousand) on overwinter growth in seawater. The growth rates in all groups declined from more than 2% of body weight per day (BWD)to less than 0.5% of BWD following the equinox. Growth rates did not differ significantly between fish transferred to seawater before the autumnal equinox and those transferred after the equinox. Fish transferred to water with reduced salinity (20 parts per thousand) had significantly better initial growth than those transferred directly to full-strength seawater (30 parts per thousand) at the same time. This difference did not persist past the winter solstice, however. These data suggest that managers can successfullyrear sockeye salmon fry as small as 1.5 g in seawater if water with 20 parts per thousand salinity is initially used.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/02/20 alle ore 02:21:22