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Genetic evidence for hybridisation between Haliotis rubra and H. laevigata

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Abstract

Seventeen abalone whose appearance was intermediate between the two commonly fished species in south-eastern Australia, blacklip (Haliotis rubra) and greenlip (H. laevigata), were collected between 1986 and 1989. Protein electrophoresis revealed that rare, morphologically intermediate abalone are predominantly F1 hybrids; others are backcross individuals. There is also evidence of possible local introgression of H. rubra genes into H. laevigata and vice versa in sympatric populations. These two species exhibit marked morphological, behavioural and genetic differences, and yet hybridisation, although rare, occurs in at least several regions of sympatry. The commonly invoked explanations for the breakdown of species barriers, environmental disturbance and rarity of one of the parent species, do not appear applicable, unless microhabitat separation creates local rarity of one species. The frequency of hybridisation is discussed in relation to regional biogeography.

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Authors and Affiliations

  1. Department of Genetics and Human Variation, La Trobe University, 3083, Bundoora, Victoria, Australia

    L. D. Brown

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  1. L. D. Brown
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Communicated by G.F. Humphrey, Sydney

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Brown, L.D. Genetic evidence for hybridisation between Haliotis rubra and H. laevigata . Marine Biology 123, 89–93 (1995). https://doi.org/10.1007/BF00350327

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  • DOI: https://doi.org/10.1007/BF00350327

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