Levels of UVB radiation (UVB) and mean temperatures have increased substantially over recent decades in many regions of the world. Both stressors independently can compromise immune function, disease resistance and fitness in fish. The impact of UVB can also be exacerbated by interactions with environmental temperatures. In this paper, we test the hypothesis that UVB and temperature act synergi...

Collective motion, where large numbers of individuals move synchronously together, is achieved when individuals adopt interaction rules that determine how they respond to their neighbors' movements and positions. These rules determine how group-living animals move, make decisions, and transmit information between individuals. Nonetheless, few studies have explicitly determined these interaction...

Despite the high global invasion profile of Gambusia holbrooki, there is limited knowledge its population dynamics, especially biological parameters for fine-scale delineation recruitment events that can provide a basis controlling this short-lived invasive species. Key to daily ageing otoliths, and in study 193 (~ 50%) 394 wild fish sampled from an invaded wetland were successfully aged. Incre...

Eastern mosquitofish (Gambusia holbrooki) were sampled from three experimental populations (two Hg-exposed populations and one reference population) to determine whether transgenerational exposure (lifelong exposure of multiple generations) to Hg adversely affects standard metabolic rate (SMR). Mosquitofish subjected to lifelong Hg exposure accumulated significant concentrations of Hg in their ...

Sexual selection is a major force behind the rapid evolution of male genital morphology among species. Most within-species studies have focused on sexual selection on male genital traits owing to events during or after copulation that increase a male's share of paternity. Very little attention has been given to whether genitalia are visual signals that cause males to vary in their attractivenes...

Spontaneous rotational preferences in swimming of mosquitofish (Gambusia holbrooki) were investigated. Females, but not males, swam in circular tanks preferentially anticlockwise in the afternoon but not in the morning. Females' rotational preferences appeared to be related to a sun-compass orientation mechanism, as they disappeared under diffuse lighting conditions and when using naive females...

Abstract In many species females prefer to mate with socially dominant males, often because it elevates their fecundity by providing greater access material resources or lowers offspring mortality due superior male defence. Far fewer studies have tested whether males females. Intriguingly, an earlier study showed that when the sexes freely interact, mosquitofish ( Gambusia holbrooki ) preferent...

Sexual harassment is common among poeciliid fish. In some fishes, males show a high frequency of sneak copulation; such sexual activity is costly to the females in terms of foraging efficiency. In mosquitofish (Gambusia holbrooki), when males are present, the distance between females tends to decrease, and this behavior has been interpreted as an adaptive strategy to dilute the costs of male se...