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- W968464735 abstract "Although some fisheries biologists have expressed concern over the practicality of hatchery enhancement of marine fisheries, hatchery technology has advanced significantly during the 1980s. Marine hatchery enhancement programs are now addressing ecology and genetics as well as animal husbandry. To describe the genetic structure of white seabass and apply the information to hatchery enhancement, we used starch-gel electrophoresis to assess the level and distribution of genetic variability of seabass from nine areas in the Southern California Bight. Average heterozygosity per sample estimates ranged from 0.024 to 0.064. Indices of genetic identity between samples were greater than 0.99. Because only 3% of the total gene diversity was due to intersample differences, and because an estimate of number of migrants exchanging genes among samples was approximately 9 per generation, we believe little population subdivision exists within the study area. Genetic diversity in six hatchery samples of white seabass was 15% lower than that found in the wild, possibly because small numbers of brood stock contribute to mass spawns. Although the genetic structure of progeny from a single mass spawn may differ from wild samples, successive mass spawns increased the genetic variability of the entire hatchery product. Therefore, continuous mass spawning of white seabass over the course of the spawning season appears to be an effective means of preserving genetic diversity. RESUMEN A pesar de las dudas expresadas por 10s biologos pesqueros con respecto a la utilidad de las piscifactorias para el mejoramiento de las pesquerias marinas, la tecnologia de estos criaderos ha mostrado avances significativos en la iiltima dCcada. Hoy dia 10s programas de mejoramiento dirigen su atencidn hacia la ecologia y la genttica, asi como tambiCn hacia la cria de ios animales. El nivel y la distribucibn" @default.
- W968464735 created "2016-06-24" @default.
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- W968464735 date "1990-01-01" @default.
- W968464735 modified "2023-09-27" @default.
- W968464735 title "Genetic structure of white seabass populations from the Southern California Bight region: applications to hatchery enhancement." @default.
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