Comparisons of genetic population structures in four intertidal brachyuran species of contrasting habitat characteristics
- 256 Downloads
Genetic population structures along the Japanese coast, analyzed by sequence data from the mitochondrial DNA COI region, were determined for four intertidal brachyuran species in the superfamily Thoracotremata (Ocypode ceratophthalma, Gaetice depressus, Chiromantes dehaani and Deiratonotus japonicus), which were characterized by different habitat requirements. O. ceratophthalma (seashore; supratidal sand) and C. dehaani (estuarine; supratidal marsh) showed no significant genetic differentiation among Japanese populations. The Japanese populations of O. ceratophthalma, however, were found to genetically differentiated from the Philippine population. G. depressus (seashore; intertidal cobbles) exhibited significant genetic differentiation between the Amami-Ohshima population and other local populations. D. japonicus (estuarine; intertidal cobbles) showed significant genetic differentiation among many local populations separated by about 30–1,200 km. The different patterns of genetic population structure recorded for the four species, thus, do not simply correspond to habitat type.
KeywordsGenetic Differentiation Genetic Population Structure Locality Number Significant Genetic Differentiation Brackish Water Area
The authors are indebted to the following persons who kindly provided important comments: M. Ishimura, J. Kitaura, H. Sato, Y. Yusa and members of the Laboratory of Population and Community Ecology, Nara Women’s University. We also thank the following persons who provided important material for this study: Y. Fukui, A. Nomoto, S. Kimura, S. Yodo, T. Kishino and T. Watanabe. Reviews of the manuscript by G. Hardy and an anonymous referee are also acknowledged. This research was supported in part by the Sasagawa Scientific Research Grant from the Japan Science Society to M.K. and by the River Fund in charge of the Foundation of River and Watershed Environment Management, Japan, to K.W.
- Fukuda Y (1980) An attempt to estimate the length of planktonic larval period in Brachyura (1). Calanus 7:9–12 (in Japanese)Google Scholar
- Nishimura S (1992) Guide to seashore animals of Japan with color pictures and keys. Hoikusha, Osaka (in Japanese)Google Scholar
- Schneider S, Kueffer JM, Excoffier L (2001) Arlequin version 2.001. A software for population genetic data analysis. Genetics and Biometry Laboratory, University of Geneva, GenevaGoogle Scholar
- Schubart CD (2001) Lack of divergence between 16S mtDNA sequences of the swimming crabs Callinectes bocourti and C. maracaiboensis (Brachyura: Portunidae) from Venezuela. Fish Bull 99:475–481Google Scholar
- Terada M (1979) On the zoea larvae of five crabs of the family Ocypodidae. Zool Mag 88:57–72 (in Japanese with English abstract)Google Scholar