Search results for "Escape response"
showing 3 items of 13 documents
Social behavioural profile of cocaine in isolated and grouped male mice
2003
Studies concerning the relationship between cocaine and aggression in humans as well as in animals have discrepant outcomes. Increases, decreases, or no changes, have been reported after single or chronic cocaine administration in animal models. To clarify, at least in part, the complex behavioural actions of cocaine, the present study evaluated cocaine effects on social behaviours of mice exposed to different situations (isolated or group housed) using confrontations between two male mice in a neutral area. Different doses of cocaine (6, 25 and 50 mg/kg) were administered in a single or binge pattern (three doses in 24 h) and the behavioural test was performed 20 min after the last injecti…
The neuropeptide Pth2 modulates social behavior and anxiety in zebrafish
2021
SummaryAnimal behavior is strongly context-dependent and behavioral performance is often modulated by internal state. In particular, different social contexts can alter anxiety levels and modulate social behavior. The vertebrate-specific neuropeptide parathyroid hormone 2 (pth2) is directly regulated by the presence or absence of conspecifics in zebrafish. As its cognate receptor, the parathyroid hormone 2 receptor (pth2r), is widely expressed across the brain, we tested fish lacking the functional Pth2 peptide in several anxiety-related and social paradigms. Rodents lacking PTH2 display increased anxiety-related behavior. Here we show that the propensity to react to sudden stimuli with an …
Parasite-induced change in host behaviour and susceptibility to predation in an eye fluke–fish interaction
2004
Abstract Trophically transmitted parasites may increase their transmission efficiency by altering the behaviour of infected hosts to increase their susceptibility to predation by target hosts (the next host in the life cycle). The parasite Diplostomum spathaceum (Trematoda) reduces the vision of its fish intermediate hosts: its metacercariae lodge themselves in the eyes of fish and induce cataract formation, which gives them the opportunity to affect fish behaviour. We examined whether D. spathaceum eye flukes change the preference of fish for the surface layers of the water column or their escape behaviour, which could make the fish more vulnerable to predation by bird hosts. We also studi…