November 12 2015

5:00 pm 154 BSRB

Kotrina Kajokaite
Department of Anthropology, UCLA

Zac Schakner
Department of Ecology and Evolutionary Biology, UCLA

Should I stay or should I go? Delayed dispersal in capuchin monkeys


Many social animals must decide whether and when to disperse from their natal group and embark on a search for a new one. In primates, dispersal has wide consequences at the individual, group and population levels. We observe lots of variation in timing of dispersal within and between primate species. The primary question to answer is: What are the conditions that favor either dispersing or staying longer in ones natal group? Studying dispersal in a long-lived species, like primates, is challenging. Formal modeling can serve as an excellent complement to the empirical data in studying dispersal patterns in primates. In this talk, I will present some ideas and preliminary work on understanding the conditions that either favor dispersing or staying longer in ones natal group in capuchin monkeys. I will start by describing a general agent-based model of delayed dispersal and will then turn to discuss how an agent-based model can be tested using parameters estimated from empirical findings about a wild population of capuchin monkeys.

Zac Schakner

Social transmission drives CSL foraging of endangered salmon: assessing the impact of lethal removal using epidemiological models

Social transmitted behaviors (eg. social learning) rapidly diffuse through populations like a disease. Understanding the dynamics of behavioral transmission is necessary for management activities aimed at reducing the incidence of undesirable wildlife behaviors. The rapid recruitment of California sea lions to the Bonneville dam impedes endangered salmonid recovery, and suggests that some form of social transmission is drawing new individuals to the novel food source. We used Network-based transmission analysis (NBDA), and long-term observations of individual sea lion’s haul out patterns to test for whether the behavior is transmitted across existing social connections. There was strong support for models with social transmission of the dam foraging behavior, especially in comparison to the support of models with no social transmission. Social transmission of the dam foraging behavior can be used to inform current management activities.











































































































































































































































































































































































































































































































































































































this is idtest: