Implementation of Genetic Conservation Practices in a Muskellunge Propagation and Stocking Program
Conservation of genetic resources is a challenging issue for agencies managing popular sport fishes. To address the ongoing potential for genetic risks, we developed a comprehensive set of recommendations to conserve genetic diversity of muskellunge (Esox masquinongy) in Wisconsin, and evaluated the...
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Veröffentlicht in: | Fisheries 2010-08, Vol.35 (8), p.388-395 |
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Zusammenfassung: | Conservation of genetic resources is a challenging issue for agencies managing popular sport fishes. To address the ongoing potential for genetic risks, we developed a comprehensive set of recommendations to conserve genetic diversity of muskellunge (Esox masquinongy) in Wisconsin, and evaluated the extent to which the recommendations can be implemented. Although some details are specific to Wisconsin's muskellunge propagation program, many of the practical issues affecting implementation are applicable to other species and production systems. We developed guidelines to restrict future broodstock collection operations to lakes with natural reproduction and to develop a set of brood lakes to use on a rotational basis within regional stock boundaries, but implementation will require considering lakes with variable stocking histories. Maintaining an effective population size sufficient to minimize the risk of losing alleles requires limiting broodstock collection to large lakes. Recommendations to better approximate the temporal distribution of spawning in hatchery operations and randomize selection of brood fish are feasible. Guidelines to modify rearing and distribution procedures face some logistic constraints. An evaluation of genetic diversity of hatchery‐produced fish during 2008 demonstrated variable success representing genetic variation of the source population. Continued evaluation of hatchery operations will optimize operational efficiency while moving toward genetic conservation goals.
la conservación de recursos genéticos es un reto importante para las agencias que administran la pesca deportiva. Con el fin de estudiar el potencial actual de riesgos genéticos, en el presente trabajo se desarrolló una serie de recomendaciones para conservar la diversidad genética del lucio común (Esox masquinongy) en Wisconsin, y se evaluó hasta dónde las recomendaciones pueden ser implementadas. Si bien algunos detalles son específicos al programa de propagación del lucio en Wisconsin, muchos de los aspectos prácticos que afectan la implementación son también aplicables a otras especies y sistemas de producción. Se desarrollaron algunas directrices para restringir en el futuro las operaciones de recolección de reproductores hacia los lagos en donde la especie se propaga de manera natural y para desarrollar un grupo de lagos de crianza que podrán ser utilizados de forma rotativa, dentro de las fronteras regionales donde se distribuyen las poblaciones, no obstante |
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ISSN: | 0363-2415 1548-8446 1548-8675 |
DOI: | 10.1577/1548-8446-35.8.388 |