Differences in predation intensity experienced by organisms can lead to divergent natural selection, driving evolutionary change. Western mosquitofish (Gambusia affinis) exhibit larger caudal regions and higher burst-swimming capabilities when coexisting with higher densities of predatory fish. It is hypothesized that a trade-off between steady (constant-speed cruising; important for acquiring ...

In the present research, mosquito fish Gambusia affinis have been exposed to lead chloride during 24, 48, 72 and 96 hours in order evaluate lethal 50 (LC50) concentration Its residue certain organs of fish. Usage EPA computer software based on Finney Probit Analysis method has statistically tested for data collected LC50 values G. if were found be 59.4, 55.9, 51.1 49. 0 mg/L, respectively. decr...

Antibiotics are a relatively common disturbance to the normal microbiota of humans and agricultural animals, sometimes resulting in severe side effects such as antibiotic-associated enterocolitis. Gambusia affinis was used as a vertebrate model for effects of a broad-spectrum antibiotic, rifampicin, on the skin and gut mucosal microbiomes. The fish were exposed to the antibiotic in the water co...

I tested the effects of male body size on male mating behavior and reproductive success in the western mosquitofish, Gambusia affinis. In two separate behavioral experiments (male–male competition and no-competition), I tested the predictions that (1) larger males out-compete smaller males for mates and (2) small males increase their number of mating attempts in the absence of a larger competit...

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