Predator-mediated interactions through changes in predator home range size can lead to local prey exclusion

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(2004)

Published: Aug. 9, 2023

The strength of indirect biotic interactions is difficult to quantify in the wild and can alter community composition. To investigate whether presence a prey species affects population growth rate another species, we quantified predator-mediated interaction using multi-prey mechanistic model predation matrix model. Models were parametrized behavioural, demographic experimental data from vertebrate that includes arctic fox (

Language: Английский

Intraseasonal variations in the spatial behaviour of an Arctic predator

Movement Ecology, Journal Year: 2025, Volume and Issue: 13(1)

Published: March 4, 2025

In highly constrained ecosystems such as in the Arctic, animals must constantly adjust their movements to cope with versatile environmental conditions. However, date most studies have focused on interseasonal differences spatial behaviour, while intraseasonal dynamics are less described. To fill this knowledge gap, we studied movement patterns of an Arctic predator, arctic fox (Vulpes lagopus) at scale. unravel temporal space use and metrics, used GPS data collected 20 individual foxes between 2017 2023 North-East Greenland. We showed that weekly full core home range sizes (estimated by means Autocorrelated Kernel Density Estimates), daily mean relative turning angles stayed constant throughout summer. Conversely, distance travelled, speed proportion 'active' time variations. These fine-scale metrics had a hump-shaped distribution, peaking mid-July, males non-breeding travelling longer distances being faster. Site-specific were also identified, having smaller territories two productive sites but moving shorter lower speeds poorest site. Our study provides novel insights into how predators behaviour variations Specifically, show different patterns. underline importance considering small spatiotemporal scales fully understand predators' behaviour.

Language: Английский

Additional data confirms the impact of the COVID19 lockdown on the behavior and fattening of migratory snow geese

Biological Conservation, Journal Year: 2023, Volume and Issue: 286, P. 110240 - 110240

Published: Sept. 18, 2023

Language: Английский