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The effect of predation risk on body weight in the field vole, Microtus agrestis

Carlsen, M ; Lodal, J ; Leirs, H. (Statens Skadedyrlaboratorium, Lyngby (Denmark)) ; Jensen, T.S

Oikos, 1999-11, Vol.87 (2), p.277-285 [Periódico revisado por pares]

Oxford: Munksgaard International Publishers, Ltd

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Título:
The effect of predation risk on body weight in the field vole, Microtus agrestis
Autor: Carlsen, M ; Lodal, J ; Leirs, H. (Statens Skadedyrlaboratorium, Lyngby (Denmark)) ; Jensen, T.S
Assuntos: Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Autoecology ; Autumn ; Biological and medical sciences ; BODY WEIGHT ; Bowls ; Breeding ; CAMPAGNOL ; CATS ; CHAT ; Control rooms ; DANEMARK ; DENMARK ; DEPREDACION ; DINAMARCA ; EXPERIMENTACION EN CAMPO ; EXPERIMENTACION EN LABORATORIO ; EXPERIMENTATION AU CHAMP ; EXPERIMENTATION EN LABORATOIRE ; FIELD EXPERIMENTATION ; Foraging ; FOXES ; Fundamental and applied biological sciences. Psychology ; GATO ; LABORATORY EXPERIMENTATION ; Mammalia ; Microtus agrestis ; MINKS ; Odors ; PESO CORPORAL ; POIDS CORPOREL ; PREDATION ; Predators ; RENARD ; TOPILLOS ; Vertebrata ; VISON ; VOLES ; ZORRO
É parte de: Oikos, 1999-11, Vol.87 (2), p.277-285
Notas: 2000000818
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Descrição: The effect of predation risk on body weight in subadult Microtus agrestis was studied in the laboratory and in the field. Exposing voles in the laboratory to faecal odours from domestic cat, captive fox and captive mink led to a larger decrease in individual body weight compared to control voles when the distance between cover and food bowl was short, despite equal intake of food in both groups of voles. Increasing the distance between cover and food bowl to 50 cm resulted in very low food intake in voles exposed to predator odour compared to control voles. In the field, voles from grids where mammalian and avian predators were excluded generally lost less or gained more weight in autumn and winter than voles from corresponding control grids. Despite some variation in individual weight changes during autumn and winter voles from exclosures gained more weight than control voles in early spring immediately before onset of reproduction. Mean weights throughout autumn, winter and spring were found to be affected not only by individual weight changes but also by immigration. When immigration was low, mean weights on predator exclusion grids were higher than on predated grids. Accordingly, the result of reduced predation risk in the laboratory as well as in the field seems to be higher body weights in the individual and often also in the population. In the field this was especially evident at the onset of breeding in spring, potentially resulting in a higher reproductive potential. The study is the first of its kind to our knowledge to show the same trend in weight development in the laboratory as well as in the field.
Editor: Oxford: Munksgaard International Publishers, Ltd
Idioma: Inglês

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The effect of predation risk on body weight in the field vole, Microtus agrestis

Carlsen, M ; Lodal, J ; Leirs, H. (Statens Skadedyrlaboratorium, Lyngby (Denmark)) ; Jensen, T.S

Oxford: Munksgaard International Publishers, Ltd

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