Lionfish (Pterois volitans), venomous predators from the Indo-Pacific, are recent invaders of the Caribbean Basin and southeastern coast of North America. Quantification of invasive lionfish abundances, along with potentially important physical and biological environmental characteristics, permitted inferences about the invasion process of reefs on the island of San Salvador in the Bahamas. Env...

Aim Migratory freshwater fishes are those that must access discrete habitats to complete their life cycles. Freshwater fish migrations occur around the world and provide numerous ecosystem services for humans natural systems; however, many migratory species in decline globally. A limiting factor successfully conserve is histories of unknown or only partially described. To researchers with criti...

Protecting hydrologic connectivity of freshwater ecosystems is fundamental to ensuring species persistence, ecosystem integrity, and human well-being. More frequent and severe droughts associated with climate change are poised to significantly alter flow intermittence patterns and hydrologic connectivity in dryland streams of the American Southwest, with deleterious effects on highly endangered...

this study reports the length-weight relationship (lwr), fulton's condition factor ( k ), and sex ratio of the non-native catfish hoplosternum littorale (hancock, 1828) in florida for the first time. sampling was conducted from november 2013 to april 2014 in tosohatchee wildlife management area in christmas, florida. a total of 477 specimens were caught (6.4-13.5 cm tl). the allometric coeffici...

The cytoplasmic microtubules of Antarctic fishes assemble from their tubulin subunits at physiological body temperatures in the range -2 to +2 degrees C. Our objective is to determine the structural features that enhance the assembly of Antarctic fish tubulins at low temperatures. Here we compare the structures of tubulin subunits from three Antarctic fishes (Notothenia gibberifrons, Notothenia...

Population and conservation genetics of two freshwater fish species, Notropis heterodon and Notropis heterolepis, were evaluated in north-eastern Illinois, U.S.A., where both species have severely declined. Fishes were sampled from two remnant populations occurring in small glacial lakes (source samples) and from two man-made ponds that had been stocked with fishes from those same lakes (sanctu...

Invasive species can cause substantial ecological impacts on native biodiversity. While ecological theory attempts to explain the processes involved in the trophic integration of invaders into native food webs and their competitive impacts on resident species, results are equivocal. In addition, quantifying the relative strength of impacts from non-native species (interspecific competition) ver...