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Occurrence of Natural Hybrid between Oplegnathus fasciatus and Oplegnathus punctatus from the South Sea of Korea  

Kwun, Hyuck-Joon (Department of Marine Biology, Pukyong National University)
Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
Publication Information
Korean Journal of Ichthyology / v.22, no.3, 2010 , pp. 201-205 More about this Journal
Abstract
One specimen of a natural hybrid of an Oplegnathus (Oplegnathus fasciatus $\times$ Oplegnathus punctatus) was found in Tongyeong, Korea in August 2008. We, herein, describe its morphological and genetic characteristics and compare them with those of O. fasciatus and O. punctatus. In morphology, the hybrid showed many distinctive black rounded blotches on body sides and four faint vertical bars, being in those features similar to O. punctatus. Although the counts and measurements of the hybrid mostly overlapped between O. fasciatus and O. punctatus, the Oplegnathus hybrid resembled O. punctatus in the ratio of pelvic-fin length in standard length: Oplegnathus hybrid (26.7%) was closer to O. punctatus (26.4%) than to O. fasciatus (17.2~23.6%). In genetics, as a result of analysis of 510 base pair sequences of mitochondrial DNA 16S rRNA, the hybrid was closer to O. fasciatus (d=0.000~0.010) than to O. punctatus (d=0.020). Our results suggest that the natural hybridization represented by the subject specimen occurred between an O. fasciatus female and an O. punctatus male.
Keywords
Oplegnathus fasciatus; Oplegnathus punctatus; natural hybrid; morphology; mtDNA 16S rRNA; Korea;
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