Microsatellite DNA analysis and hydrodynamic modelling reveal the extent of larval transport and gene flow between management zones in an exploited marine fish (Glaucosoma hebraicum)
作者： OLIVER BERRY , PHILLIP ENGLAND , DAVID FAIRCLOUGH , GARY JACKSON , JIM GREENWOOD
DOI: 10.1111/J.1365-2419.2012.00623.X
关键词:
摘要: Determining the extent of dispersal in exploited marine fishes is essential for understanding their population dynamics and optimising management. The West Australian dhufish, Glaucosoma hebraicum, a highly sought-after, large long-lived reef-dwelling species, endemic to south-western Australia. Stock assessments indicate that this indicator species overexploited. fishery managed using zone-based system, which implicitly assumes high degree demographic independence among zones. While tagging studies limited movement adult G. there no spatial scale its larvae thus true interdependence management We analysed 13 microsatellite DNA loci characterise gene flow, conducted particle tracking simulations model larval transport species. Genetic data demonstrated some local recruitment was likely, but on broad flow between zones extensive, entire represents single genetic stock. Hydrodynamic modelling predicted majority dhufish recruit from within zone where they are spawned, inter-annual variation current velocities has effect transport. Because likely be largely independent terms both recruitment, heavy localised fishing pressure potential reduce abundance reproductive capacity fished areas, it should have impact neutral diversity.
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