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Josi, D., Flury J.M., Reyes-Contreras, M., Tanaka, H., Taborsky, M., Frommen, J.G. Age- and sex-dependent variation in relatedness corresponds to reproductive skew, territory inheritance, and workload in cooperatively breeding cichlids. Josi, D., Heg, D., Takeyama, T., Bonfils, D., Konovalov, D.A., Frommen, J.G., Kohda, M., Taborsky, M. >225 publications in peer reviewed scientific journals and books 6 authored and edited books and special journal issues
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Only an integrative approach toward behaviour will be geared for answering encompassing questions 7.įor information on our questions, study systems, approaches and results within this framework please click on the numbered links ( 1-7) above.
#KONTAKT FACTORY LIBRARY CONTENT MISSING 2193 MISSING SAMPLES FULL#
For a full comprehension of the evolution of behaviour we need to understand both, the adaptive value of a trait and its underlying physiological and genetic mechanisms. When pondering on mechanisms, one should be clear about the explanatory level on target. Hence they constitute an ideal model for the study of mechanisms underlying this ultimate level of cooperation 6. Fungus cultivating beetles represent one of three highly social insect lineages relying on agriculture, without having gone all the way to lifelong reproductive abstinence. If we are interested in the evolution of the pinnacle of social organisation, eusociality, where many individuals in a population forfeit reproduction lifelong, intermediate stages in the transition towards such ‘reproductive altruism’ should be in focus. Remarkably, individuals may actively alter their environment to create ‘extended phenotype signals’, which have many advantages over bodily attributes 5. The means to outcompete others in the rat race for resources includes the production of signals, which can be of morphological or behavioural origin. But individuals vary in many respects, including their personal history, state, condition, quality, and opportunities 4. This is intriguing because it is often assumed that there is only one optimal solution to a problem, which should be produced by natural selection. Examples include alternative reproductive tactics and consistent behavioural types, also referred to as ‘animal personalities’. Natural populations often comprise alternative behavioural phenotypes. Among social organisations found in nature, cooperative breeders provide a unique opportunity to study alternative selection mechanisms underlying altruistic behaviour 3. Nevertheless, a few simple selection mechanisms can generate evolutionarily stable levels of cooperation 2. The latter may involve cooperation and altruism, which Charles Darwin considered as one of the most important test cases for his theory of evolution by natural selection. They may succeed by ‘racing’ to outcompete others, by ‘fighting’ for privileged access, or by ‘sharing’ their efforts and gains 1. At the same time, individuals inevitably compete for resources. Virtually each behaviour is social in essence it affects the survival, production and reproduction of others in some way or another. I am interested in the adaptive function of behaviour, with emphasis on social behaviour and alternative reproductive and behavioural tactics.