They latch onto fish like leeches and leave large wounds, often killing large numbers of the fish they prey on. "If you think about having an open wound in saltwater versus freshwater, the effects are more severe in freshwater because cells can rupture at a faster rate.
Keywords: genetic diversity; fisheries; conservation genetics; size selection; population genetics. Key Contribution: This review assesses the importance of considering multiple factors that could. affect the vulnerability of an overfished population to loss of genetic diversity.

The detection of genetic diversity patterns suggests that conservation measures should consider mismatching spatial signals across multiple facets of biodiversity. Biogeographic patterns of genetic diversity are poorly documented, especially for fish species.

Genetic calibration of species diversity among North America's freshwater fishes.The database presently contains curated mitochondrial genomes from 1302 fish species belonging to 297 families and 47 orders reported from saltwater and freshwater ecosystems.

Sampled fish species, their characteristics and genetic diversity estimates in COI mitochondrial gene (COI-).Estimates of genetic diversity in COI were obtained for populations of seven fish species with different commercial importance from the East China Sea.