Systematic studies on the freshwater goby, Rhinogobius species (Percifromes, Gobiidae). II. BEographic distribution and taxonomic status of three color types in the Rhinogobius brunneus complex from South Korea.

밀어속(genus Rhinogobius, Gobiidae) 어류의 계통분류학적 연구II. 한국산 밀어(R. brunneus complex) 3型의 분포 및 분류학적 고찰

  • 김종범 (인하대학교 이과대학 생물학과) ;
  • 양서영 (인하대학교 이과대학 생물학과)
  • Published : 1996.12.01

Abstract

The geographic distribution and variation for Rhinogobius brunneus were surveyed by means of allozymic and morphological analyses and it was revealed that the Korean populations of R. brunneus comprise three distinct types, Type-A, Type-B, and Type-C, which show considerable differentiation to a degree of interspecific level(Rogers' S(1972): $S_{A-B}$=0.631, $S_{A-C}$=0.628, $S_{B-C}$=0.661). In addition, no evidence of gene flow among the types was found at sympatric area and it is assumed that reproductive isolation is completed. Moreover there is microhabitat segregation according to the distance from river mouth among each types and which segregation was regarded as a factor to facilitate reproductive isolating mechanism. Therefore, based on the evidence presented above, these three types of R. brunneus are considered as typical discrete species.

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