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- W2010758466 abstract "Abstract: We used 51 isozyme loci to determine the population genetic structure of bull trout (Salvelinus confluentus) in the Columbia and Klamath River drainages. The sampled populations have little genetic variation within and significant genetic differences among themselves. Preserving the genetic diversity of bull trout will require the continued existence of many populations throughout this region. Bull trout from the Columbia and Klamath drainages would qualify as separate “species” under the United States Endangered Species Act according to criteria established for anadromous salmonid fishes. Genotype frequencies at the four variable loci in a group of bull trout used for artificial supplementation indicate an extremely small number of effective parents. The release of such fish into the wild could have harmful effects on native fish populations. Non-native brook trout (Salvelinus fontinalis) have been introduced throughout the range of bull trout, and hybridization between these species has been reported. Protein and mitochondrial DNA genotypes collected from one stream in western Montana over an eight-year period indicate the displacement of bull trout by brook trout. This rapid displacement was accompanied by extensive production of interspecific first-generation hybrids by both reciprocal crosses. Resumen: Usamos 51 loci de enzimas para determinar la estructura poblacional genética de la trucha “bull” (Salvelinus confluentus) en las cuencas de los ríos Columbia Kalmath. Las poblaciones muestreadas tienen poca variabilidad genética interna y diferencias genéticas significativas entre ellas. La preservación de la diversidad genética de la trucha “bull” requerirá la existencia contínua de muchas poblaciones a lo largo de esta región. La trucha “bull” de las cuencas de los ríos Columbia y Klamath podrían ser catalogadas como “especies” distintas bajo el Acta de Especies en peligro de los Estados Unidos de acuerdo a los criterios establecidos para especies de salmónidos anádromos. La frecuencias genotípicas de los cuatro loci variables en un grupo de trucha “bull” usado para la suplementación artificial indica un número efectivo de padres extremadamente pequeña. La introducción en la naturaleza de tales peces podría tener efectos nocivos sobre las poblaciones nativas de peces. Truchas “brook”, no-nativas (Salvelinus fontinalis) han sido introducidas a lo largo de todo el rango de distribución de la trucha bull, y se ha reportado la hibridación entre estas especies. Genotípos de proteínas y mitocondriales recolectados en un arroyo en el oeste de Montana a lo largo de un período de ocho años indica que la trucha “bull” esta siendo desplazada por la trucha “brook”. Este rápido desplazamiento fue acompañado por la extensiva producción de híbridos inter-específicos de primera generación por los dos cruces recíprocos." @default.
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- W2010758466 date "1993-12-01" @default.
- W2010758466 modified "2023-09-25" @default.
- W2010758466 title "Conservation Genetics of Bull Trout in the Columbia and Klamath River Drainages" @default.
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- W2010758466 doi "https://doi.org/10.1046/j.1523-1739.1993.740856.x" @default.
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