Publikation: Infanticide by Females Is a Leading Source of Juvenile Mortality in a Large Social Carnivore
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2021
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The American Naturalist. University of Chicago Press. 2021, 198(5), S. 642-652. ISSN 0003-0147. eISSN 1537-5323. Verfügbar unter: doi: 10.1086/716636
Zusammenfassung
Social animals benefit from their groupmates, so why do they sometimes kill each other's offspring? Using 30 years of data from multiple groups of wild spotted hyenas, we address three critical aims for understanding infanticide in any species: (1) quantify the contribution of infanticide to overall mortality, (2) describe the circumstances under which infanticide occurs, and (3) evaluate hypotheses about the evolution of infanticide. We find that infanticide, although observed only rarely, is in fact a leading source of juvenile mortality. Infanticide accounted for 24% of juvenile mortality, and one in 10 hyenas born in our population perished as a result of infanticide. In all observed cases of infanticide, killers were adult females, but victims could be of both sexes. Of four hypotheses regarding the evolution of infanticide, we found the most support for the hypothesis that infanticide in spotted hyenas reflects competition over social status among matrilines.
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570 Biowissenschaften, Biologie
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hyena, matrilineal society, thanatology, female-female competition, nepotism, cannibalism
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BROWN, Ally K., Malit O. PIOON, Kay E. HOLEKAMP, Eli D. STRAUSS, 2021. Infanticide by Females Is a Leading Source of Juvenile Mortality in a Large Social Carnivore. In: The American Naturalist. University of Chicago Press. 2021, 198(5), S. 642-652. ISSN 0003-0147. eISSN 1537-5323. Verfügbar unter: doi: 10.1086/716636BibTex
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year={2021},
doi={10.1086/716636},
title={Infanticide by Females Is a Leading Source of Juvenile Mortality in a Large Social Carnivore},
number={5},
volume={198},
issn={0003-0147},
journal={The American Naturalist},
pages={642--652},
author={Brown, Ally K. and Pioon, Malit O. and Holekamp, Kay E. and Strauss, Eli D.}
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<dcterms:abstract xml:lang="eng">Social animals benefit from their groupmates, so why do they sometimes kill each other's offspring? Using 30 years of data from multiple groups of wild spotted hyenas, we address three critical aims for understanding infanticide in any species: (1) quantify the contribution of infanticide to overall mortality, (2) describe the circumstances under which infanticide occurs, and (3) evaluate hypotheses about the evolution of infanticide. We find that infanticide, although observed only rarely, is in fact a leading source of juvenile mortality. Infanticide accounted for 24% of juvenile mortality, and one in 10 hyenas born in our population perished as a result of infanticide. In all observed cases of infanticide, killers were adult females, but victims could be of both sexes. Of four hypotheses regarding the evolution of infanticide, we found the most support for the hypothesis that infanticide in spotted hyenas reflects competition over social status among matrilines.</dcterms:abstract>
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