Abstract
We examined morphological and molecular characteristics of individuals of Macroramphosus in Japanese waters (the East China Sea and the northwestern Pacific). Two morphotypes (M. scolopax-type and M. gracilis-type) that were differentiated based on 10 quantitative morphological characters were not supported by molecular analyses using nuclear and mitochondrial DNA markers, while a genetic deviation was observed between populations of Macroramphosus from the northwestern Pacific and the northeastern Atlantic. Macroramphosusscolopax-type and M. gracilis-type individuals are thought to be intraspecific morphotypes adapted to plankton and benthos feeding, respectively.
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