| the past and present of an estuarine-resident fish, the "four-eyed fish" anableps anableps (cyprinodontiformes, anablepidae), revealed by mtdna sequences. | historical events, such as changes in sea level during the pleistocene glacial cycles, had a strong impact on coastal habitats, limiting connectivity and promoting the genetic divergence of various species. in this study, we evaluated the influence of climate oscillations and the possibility of estuary function as a barrier to gene flow among populations of the four-eyed fish, anableps anableps. this species is fully estuarine-resident, has internal fertilization, is viviparous and does not migr ... | 2014 | 25003185 |