Opportunistic hybridization between two congeneric tropical reef fish

Walker, S.P.W., and Ryen, C. (2007) Opportunistic hybridization between two congeneric tropical reef fish. Coral Reefs, 26 (3). p. 539.

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[Extract] The wrasses Halichoeres margaritaceus and Halichoeres miniatus (family Labridae) are monandric protogynous hermaphrodites, where males are derived from females through post-maturational sex change. Under stable social conditions the male of each species guards several intraspecific females and mates exclusively with those females daily. However, when male H. miniatus were removed during behavioural experiments at Lizard Island, Great Barrier Reef, male H. margaritaceus increased territory area to incorporate both H. margaritaceus and H. miniatus females. H. miniatus females participated in courting behaviour, resulting in pair-spawning bouts. When eggs from such spawnings were collected 79% were found to be fertilized, and these embryos hatched and develop into larvae. Hybrid spawning via the removal of H. miniatus males was replicated at two additional sites within the lagoon.

Item ID: 29240
Item Type: Article (Short Note)
ISSN: 1432-0975
Date Deposited: 13 Sep 2013 00:03
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 40%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060201 Behavioural Ecology @ 30%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060304 Ethology and Sociobiology @ 30%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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