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Gamete compatibility between marine and estuarine Acanthopagrus spp. (Sparidae) and their hybrids

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On Australia's south-east coast, hybridization between estuary-restricted black bream Acanthopagrus butcheri Munro and its migratory coastal congener yellowfin bream Acanthopagrus australis (G√ľnther) has led to estuarine populations largely composed of hybrids that are most genetically similar to A. butcheri. The fertilization success achieved when ova of estuary-caught A. butcheri were fertilized with the cryogenically preserved sperm of either ocean-caught A. australis or estuary-caught A. butcheri-like was compared. The experimental crosses, which by chance included both pure parental and hybrid bream, revealed no evidence that gametic incompatibility provides a barrier to fertilization among both pure species and their hybrids.

Keywords: A. butcheri; Acanthopagrus australis; coastal lake or lagoon; hybridization

Document Type: Research Article


Affiliations: Institute for Conservation Biology and Environmental Management, School of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia

Publication date: 2010-08-01

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