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Titolo:
Morphological criteria for identification of two forms (river, Sea) of brown trout (Salmo trutta) present in the same river.
Autore:
Bagliniere, JL; Ombredane, D; Marchand, F;
Indirizzi:
INRA, ENSAR, UMR, F-35042 Rennes, France INRA Rennes France F-35042INRA, ENSAR, UMR, F-35042 Rennes, France
Titolo Testata:
BULLETIN FRANCAIS DE LA PECHE ET DE LA PISCICULTURE
fascicolo: 357-60, , anno: 2001,
pagine: 375 - 383
SICI:
0767-2861(2001):357-60<375:MCFIOT>2.0.ZU;2-5
Fonte:
ISI
Lingua:
FRE
Soggetto:
ATLANTIC SALMON;
Keywords:
stock; ecological form; identification; brown trout; biometry; morphology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Bagliniere, JL INRA, ENSAR, UMR, 65 Rue St Brieuc, F-35042 Rennes, France INRA 65 Rue St Brieuc Rennes France F-35042 Rennes, France
Citazione:
J.L. Bagliniere et al., "Morphological criteria for identification of two forms (river, Sea) of brown trout (Salmo trutta) present in the same river.", B FR PECHE, (357-60), 2001, pp. 375-383

Abstract

The brown trout (Salmo trutta) is living under two forms, river and sea, in many rivers along the Atlantic and Channel coasts. These two forms are considered as coming from the same stock because each form can produces the other one and they can interbreed between them in sympatric spawning area. The present study showed there existed some morphological reliable criteria for the identification between the two forms during their biological cycle. In resident and migrating juvenile fish, the distinction was only possibleat the migrating stage because of the higher silvering rate in sea form (smolt group) than in river form (parr group). In adult fish, the distinctionis possible when size and color criteria were used but it had to check by a scale-reading method. Distinction between the two forms allows to measurethe abundance level and their long-term evolution in the same river.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 08:52:59