Factors affecting incidence of infanticide and discrimination of related and unrelated neonates in male Mus musculus |
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| Authors: | R J Brooks L Schwarzkopf |
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| Affiliation: | 1. Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA;2. Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA;3. Division of Geriatrics and Clinical Gerontology, National Institute on Aging, Bethesda, MD 20892, USA;4. Department of Ophthalmology and Visual Sciences, Albert Einstein College of Medicine, Bronx, NY 10461, USA;1. State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People''s Republic of China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People''s Republic of China;3. State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People''s Republic of China;1. Institute of Biochemistry and Genetics of Ufa Federal Research Centre of Russian Academy of Sciences, 71 October Avenue, 450054 Ufa, Russia;2. Section of Genomics of Common Disease, Department of Medicine, Imperial College London, Hammersmith Hospital Campus, Burlington Danes Building, Du Cane Road, London W12 0NN, United Kingdom;3. Bashkir State Medical University, 3 Lenin Street, 450008 Ufa, Russia;4. G.G. Kuvatov Republic Clinical Hospital, 132 Dostoevsky Street, 450005 Ufa, Russia;1. GeoZentrum Nordbayern, Friedrich-Alexander University (FAU) Erlangen-Nürnberg, Schlossgarten 5, 91054, Erlangen, Germany;2. Université de Strasbourg, CNRS Institut Terre et Environnement de Strasbourg, UMR 7063, 5 rue René Descartes, 67084, Strasbourg, Cedex, France;3. SFF PoreLab, The Njord Centre, Department of Physics, University of Oslo, P.O. Box 1048 Blindern, NO-0316, Oslo, Norway;4. Institute of Geology, University of the Punjab, Pakistan;1. Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy;2. Regional Neurogenetic Centre, ASP Catanzaro, Lamezia Terme, Italy;3. Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, UK |
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| Abstract: | Infanticide by males was examined in two strains (C57B1 and DBA) of the house mouse (Mus musculus). Males that had contact with a female within the previous 2-3 weeks rarely committed infanticide when introduced to the home cage of a female and her 1-day-old neonates, even when the female and neonates were of a different strain and from a different colony. In contrast, 90% of C57B1 males that had no contact with a female for more than 7 weeks killed pups when placed in the female's home cage, and 60% killed when a 1-day-old pup was introduced to the male's home cage. No difference in levels of infanticide occurred when grouped males were compared to isolated males. These results indicate that infanticide is not dependent upon recognition of the pups or the female, but depends on the male's previous exposure to females. Infanticidal behavior is not directly determined by genetic relationship, but the factors that inhibit this behavior reduce the probability that a male will kill his own offspring. |
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