Biological and Genetic Characteristics of Restocked and WildAcanthopagrus butcheri(Sparidae) in a Southwestern Australian Estuary
| Autor: | S. Alex Hesp, Jennifer A. Chaplin, Nicole M. Phillips, A. Cottingham, Ian C. Potter, M. J. Gardner, Greg I. Jenkins |
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| Rok vydání: | 2013 |
| Předmět: |
geography
Genetic diversity geography.geographical_feature_category Sparidae biology Estuary Broodstock Management Monitoring Policy and Law Aquatic Science biology.organism_classification Fishery Freshwater discharge Microsatellite Inbreeding Ecology Evolution Behavior and Systematics Acanthopagrus butcheri |
| Zdroj: | Reviews in Fisheries Science. 21:441-453 |
| ISSN: | 1547-6553 1064-1262 |
| Popis: | Acanthopagrus butcheri was restocked in an estuary in which it had become depleted. The restocked fish were cultured in 2001 and 2002 using broodstock from that estuary. These fish, whose otoliths had been stained with alizarin complexone, were released into the estuary and their biological performance tracked for seven to eight years. The 2002 cohort, introduced at circa four months old in autumn, survived far better than the 2001 cohort, introduced at circa seven months old in winter, when freshwater discharge peaks and temperatures are low. While restocked fish matured and grew nearly as fast as wild fish, the increase in density was accompanied by a reduced growth of wild fish. Genetic comparisons, using seven microsatellite loci, demonstrated that the expected heterozygosity and relatedness of restocked and wild A. butcheri, which is naturally characterized by low levels of genetic polymorphism, were similar. Although culturing did not demonstrably increase the level of inbreeding, it did result in t... |
| Databáze: | OpenAIRE |
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