Titre du document / Document title

Identification by scale analysis of farmed Atlantic salmon juveniles in southwestern New brunswick rivers

Auteur(s) / Author(s)

STOKESBURY Michael J. W. ⁽¹⁾ ; LACROIX Gilles L. ⁽²⁾ ; PRICE E. Lisa ⁽³⁾ ; KNOX Derek ⁽²⁾ ; DADSWELL Michael J. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Biology, Acadia University, Wolfville, Nova Scotia BOP 1X0, CANADA
⁽²⁾ Department of Fisheries and Oceans, Oceans Branch, Biological Station, 531 Brandy Cove Road, St, Andrews, New Brunswick EOG 2X0, CANADA
⁽³⁾ Department of Psychology, University of New Brunswick, Fredericton, New Brunswick E3B 6E4, CANADA

Résumé / Abstract

A procedure was developed to identify whether the natal origin of juvenile Atlantic salmon Salmo salar in the Magaguadavic River, New Brunswick, was farmed or wild. Farmed juveniles enter this river as escapees from commercial hatcheries. The discriminant function was developed using measured scale characteristics for the first year of growth, as determined from samples of farmed and wild juvenile Atlantic salmon of known origin. Eight scale characteristics proved to be significant predictors of origin. In a jackknife cross-validation, the discriminant function was 90% accurate in predicting the origin of juvenile Atlantic salmon in the Magaguadavic River. The procedure was then applied to juvenile Atlantic salmon of unknown natal origin sampled from the Magaguadavic and neighboring Waweig and Digdequash rivers, which also support salmon hatcheries. Of the juvenile Atlantic salmon sampled in the Magaguadavic River.in 1996, 1997, and 1998, 36, 59, and 43%, respectively, were estimated to be of farmed origin. During 1998, an estimated 9% and 42% of juvenile Atlantic salmon sampled from the Digdequash and Waweig rivers, respectively, wereof farmed origin. The study indicated that farmed juvenile Atlantic salmon escaped from hatcheries and occupied suitable habitat in all three rivers.

Revue / Journal Title

Transactions of the American Fisheries Society   ISSN 0002-8487   CODEN TAFSAI 

Source / Source

2001, vol. 130, n^o5, pp. 815-822 (27 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Fisheries Society, Bethesda, MD, ETATS-UNIS  (1900) (Revue)

Mots-clés anglais / English Keywords

Salmonidae ; Vertebrata ; Pisces ; Freshwater environment ; America ; North America ; Canada ; Salmo salar ; New Brunswick ; Anadromy ; Stream ; Scale ; Investigation method ; Breeding site ; Origin ; Specific identification ; Intraspecific comparison ; Wild animal ; Farming animal ; Discriminant analysis ;

Mots-clés français / French Keywords

Salmonidae ; Vertebrata ; Pisces ; Milieu eau douce ; Amérique ; Amérique du Nord ; Canada ; Salmo salar ; Nouveau Brunswick ; Anadromie ; Cours eau ; Ecaille ; Méthode étude ; Site reproduction ; Origine ; Identification spécifique ; Comparaison intraspécifique ; Animal sauvage ; Animal élevage ; Analyse discriminante ;

Mots-clés espagnols / Spanish Keywords

Salmonidae ; Vertebrata ; Pisces ; Medio agua dulce ; America ; America del norte ; Canada ; Salmo salar ; Nuevo Brunswick ; Anadromia ; Curso agua ; Escama ; Método estudio ; Lugar reproducción ; Origen ; Identificación especifica ; Comparación intraespecífica ; Animal salvaje ; Animal cría ; Análisis discriminante ;

Localisation / Location

INIST-CNRS, Cote INIST : 9749, 35400009944068.0080