作者
Ross MacLeod, Johan Lind, Jacquie Clark, Will Cresswell
发表日期
2007/10
期刊
Ecology Letters
卷号
10
期号
10
页码范围
945-955
出版商
Blackwell Publishing Ltd
简介
In theory, survival rates and consequent population status might be predictable from instantaneous behavioural measures of how animals prioritize foraging vs. avoiding predation. We show, for the 30 most common small bird species ringed in the UK, that one quarter respond to higher predation risk as if it is mass‐dependent and lose mass. Half respond to predation risk as if it only interrupts their foraging and gain mass thus avoiding consequent increased starvation risk from reduced foraging time. These mass responses to higher predation risk are correlated with population and conservation status both within and between species (and independently of foraging habitat, foraging guild, sociality index and size) over the last 30 years in Britain, with mass loss being associated with declining populations and mass gain with increasing populations. If individuals show an interrupted foraging response to higher …
学术搜索中的文章
R MacLeod, J Lind, J Clark, W Cresswell - Ecology Letters, 2007