| biogeography of a southern hemisphere freshwater fish: how important is marine dispersal? | galaxias maculatus is one of the world's most widely distributed freshwater fish. this species has a marine-tolerant juvenile phase, and a geographical range extending through much of the southern hemisphere. we conducted phylogeographic analyses of 163 control region haplotypes of g. maculatus, including samples from new zealand (five locations), tasmania (one location) and chile (one location). a lack of genetic structure among new zealand samples suggests that marine dispersal facilitates con ... | 2000 | 11091317 |