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Titolo:
Effects of water discharge and temperature on the seaward migration of anadromous brown trout, Salmo trutta, smolts
Autore:
Hembre, B; Arnekleiv, JV; LAbee-Lund, JH;
Indirizzi:
Norwegian Univ Sci & Technol, Museum Nat Hist & Archaeol, NO-7491 Trondheim, Norway Norwegian Univ Sci & Technol Trondheim Norway NO-7491 Trondheim, Norway Univ Oslo, Dept Biol, Div Zool, N-0316 Oslo, Norway Univ Oslo Oslo Norway N-0316 o, Dept Biol, Div Zool, N-0316 Oslo, Norway
Titolo Testata:
ECOLOGY OF FRESHWATER FISH
fascicolo: 1, volume: 10, anno: 2001,
pagine: 61 - 64
SICI:
0906-6691(200103)10:1<61:EOWDAT>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATLANTIC SALMON; MOVEMENTS; SALAR;
Keywords:
anadromous brown trout; Salmo trutta; smolt migration; water discharge; temperature;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Arnekleiv, JV Norwegian Univ Sci & Technol, Museum Nat Hist & Archaeol, NO-7491 Trondheim, Norway Norwegian Univ Sci & Technol Trondheim Norway NO-7491 rway
Citazione:
B. Hembre et al., "Effects of water discharge and temperature on the seaward migration of anadromous brown trout, Salmo trutta, smolts", ECOL FRESHW, 10(1), 2001, pp. 61-64

Abstract

The smolt run of anadromous brown trout (Salmo trutta) in a Norwegian river was studied for three consecutive years. The main run occurred in a period of 7-10 days in the middle or second half of May. Support was found for the hypothesis that high water discharge and temperature triggered the run. Few smolts descended when the discharge was low (<50 m(3) . s(-1)) and the water temperature was below 4<degrees>C. The maximum number were caught when the discharge was moderate (70-150 m(3) . s(-1)) and the water temperature high (6-8 degreesC). The relative importance of these factors varied fromyear to year. The first-year discharge explained 38% of the variation in the number of smolts migrating. Discharge and temperature together explained61% in 1992 and 28% in the second and third year, respectively.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 08:51:00