caa a22 4500 465782604 CHVBK 20180323111959.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF00180306 doi (NATIONALLICENCE)springer-10.1007/BF00180306 Intensity of territorial defense in red squirrels: an experimental test of the asymmetric war of attrition [Elektronische Daten] [Karen Price, Stan Boutin, Ron Ydenberg] Summary: Red squirrels defend exclusive, individual territories year round, 20% to 50% of females do not breed in any given year, and breeding females raise juveniles on their territories. Breeding is asynchronous, and the offspring of early-breeding females are more likely to hold an independently won territory than are late-born offspring. Based on the asymmetric war of attrition, we made the following predictions: (1) squirrels would respond more intensely to the calls of unfamiliar individuals than to the calls of neighbors; (2) breeding females would respond more intensely to unknown calls than would non-breeding females or males; (3) early-breeding females would respond more intensely than would late-breeding females to unknown calls; and (4) all classes of squirrels would respond similarly to the calls of neighbors. Playback experiments supported the predictions. Alternative hypotheses of kin selection, risk of infanticide, and seasonal difference in intruder pressure could not explain the results. Springer-Verlag, 1990 Price Karen Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, BC, Canada aut Boutin Stan Department of Zoology, University of Alberta, T6G 2E1, Edmonton, Alta, Canada aut Ydenberg Ron Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, BC, Canada aut Behavioral Ecology and Sociobiology Springer-Verlag 27/3(1990-09-01), 217-222 0340-5443 27:3<217 1990 27 265 https://doi.org/10.1007/BF00180306 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00180306 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Price Karen Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, BC, Canada aut NATIONALLICENCE 700 1- Boutin Stan Department of Zoology, University of Alberta, T6G 2E1, Edmonton, Alta, Canada aut NATIONALLICENCE 700 1- Ydenberg Ron Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, BC, Canada aut NATIONALLICENCE 773 0- Behavioral Ecology and Sociobiology Springer-Verlag 27/3(1990-09-01), 217-222 0340-5443 27:3<217 1990 27 265 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer