Abstract:
:Bitterling fishes deposit their eggs on the gills of living mussels using a long ovipositor. We examined whether ovipositor length (OL) and egg shape correlated with differences in host mussel species in the family Unionidae among populations of the tabira bitterling (Acheilognathus tabira) in Japan. Bitterling populations that use mussels in the sub-family Anodontinae possessed longer ovipositors and more elongated eggs than those using mussels of Unioninae, as expected from the difference in host size between the sub-families (anodontine mussels are larger than unionine mussels). Based on a robust phylogeny of A. tabira populations, we demonstrated that the evolution of both OL and egg shape were correlated with host differences, but not with each other, suggesting that these traits have been selected for independently. Our study demonstrates how adaptive traits for brood parasitism may diverge with host shift due to different host availability and/or interspecific competition for hosts.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Kitamura J,Nagata N,Nakajima J,Sota Tdoi
10.1111/j.1420-9101.2011.02453.xsubject
Has Abstractpub_date
2012-03-01 00:00:00pages
566-73issue
3eissn
1010-061Xissn
1420-9101journal_volume
25pub_type
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