Barriers are an effective mechanism for managing invasive species, such as sea lamprey in the Laurentian Great Lakes but detrimental because they limit migration of desirable, native species. Fish passage technologies that selectively pass desirable species while blocking undesirable needed. Optical sorting tools, combined with newly developed computer learning algorithms, could be used to iden...

Exposure to olfactory cues during embryonic development can have long term impacts on birds and amphibians behaviour. Despite the vast literature on predator recognition and responses in fishes, few researchers have determined how fish embryos respond to predator cues. Here we exposed four-day-old rainbowfish (Melanotaenia duboulayi) embryos to cues emanating from a novel predator, a native pre...

Proteolytic and/or lipolytic lactic acid bacteria (LAB) were isolated from visceral wastes of different fresh water fishes. LAB count was found to be highest in case of visceral wastes of Mrigal (5.88 log cfu/g) and lowest in that of tilapia (4.22 log cfu/g). Morphological, biochemical and molecular characterization of the selected LAB isolates were carried out. Two isolates FJ1 (E. faecalis NC...

—This report presents data from one of the largest standardized stream surveys conducted in the western United States, which shows that one of every four individual fish in streams of 12 western states are nonnative. The states surveyed included Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington, and Wyoming. The most widely distributed a...

Sauger (Sander canadensis) and walleye (S. vitreus) are percid fishes that naturally co-occur throughout much of the eastern United States. The native range of sauger extends into the upper Missouri River drainage where walleye did not historically occur, but have been stocked as a sport fish. Sauger populations have been declining due to habitat loss, fragmentation, and competition with non-na...

Freshwater biodiversity is declining faster than terrestrial and marine biodiversity. The protection restoration of aquatic habitats are based, in part, on stemming this decline. We conducted a spatial conservation assessment native fishes the Lahontan central Nevada basins using core-area zonation. complementarity-based yielded landscape value (rank) all subwatersheds (12-digit hydrologic unit...