Foraging, feeding, and physiological stress responses of wild wood mice to increased illumination and common genet cues  

作　　者：Alvaro NAVARRO-CASTILLA Isabel BARJA Mario DíAZ 

机构地区：[1]Department of Biology, Faculty of Sciences, Universidad Autónoma de Madrid, C/Darwin 2, Campus Universitario de Cantolanco, Madrid 28049, Spain [2]Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales, CSIC, Madrid 28006, Spain

出　　处：《Current Zoology》2018年第4期409-417,共9页动物学报（英文版）

摘　　要：In nature, animals are exposed to a broad range of threats imposed by predators, which may strongly influence the ecology of prey species directly or indirectly by affecting their behavior via fear of predation. Here, we studied wood mice Apodemus sylvaticus behavioral and physiological responses to simulated predation risk. Risk avoidance was analyzed by live trapping with control traps and traps treated with feces of common genet Genetta genetta （direct cue of risk） under new moon nights and following by simulated full moon conditions （indirect cue）. The time devoted to foraging behavior and capture time were analyzed by video recording mice activity around traps. Food intake was calculated based on the amount of bait remaining in each trap. Fecal cortico- sterone metabolites （FCMs） were measured by enzyme-immunoassay as indicators of physio- logical stress responses. Fewer wood mice were captured during full moon, yet only non-breeding adult males clearly avoided common genet odor. Mice were captured sooner at night during the simulated full moon conditions and later in predator-treated traps. Foraging activity was lower when individuals faced predator＇s feces, but neither food intake nor FCM levels were affected by predation risk cues. Direct and indirect cues of predation risk selectively affected wood mice behavior, although behavioral responses seem to be modulated by different costs-benefit balances related to the individual＇s perception of risk. The lack of physiological responses to predation risk cues suggests that wood mice did not perceive them as reliable stressors or the response was too small or transient to be measured by FCM.

关 键 词：common genet fecal predator cues FEEDING FORAGING MOONLIGHT predator avoidance 

分 类 号：S511.01[农业科学—作物学] Q959.837[生物学—动物学]