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  • Animal Behaviour

    © Universität Bielefeld

Sea Lion Project Galápagos

Pricipal Investigator of Animal Behaviour

The unifying feature of my different research projects is life history strategy evolution, the way natural selection optimises the entire life of an organism. Differences between individuals and their life histories are evaluated by natural selection on the basis of fitness. Hence it is of paramount importance to measure fitness if we want to attach biological meaningfulness to animal behaviour. However, animal behaviour and life history strategies do not evolve in isolation. Individual behaviour is bound to have consequences at the population level and, conversely, populations set the stage for the evolution of life history strategies and animal behaviour. As a consequence, by studying life history strategies, my research is encompassed by a triangle of evolution, ecology and ethology. Only detailed knowledge of individual fitness allows one to decompose individual behavioural variation into components of genotypic and phenotypic quality, as well as environmental effects.

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Jonas Schwarz

Institute
Institute of Marine Sciences University of California, Santa Cruz
E-Mail
jonas.fl.schwarz@gmail.com

Research Interests

Postdoctoral Research Fellow collaborating with the University of California, Santa Cruz, to explore the determinants of individual foraging behavior in Galápagos, California, Southern, New Zealand, and Australian sea lions. 

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Svenja Stöhr

E-Mail
svenja.stoehr@uni-bielefeld.de
Phone
+49 521 106-2725
Office
VHF-204a

PhD student in the Galapagos Sea Lion Project, investigating the development and consequences of individual foraging strategies in sea lion females and immatures, using dive computers, personality tests and behavior observations.

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Alexandra Kate Childs

E-Mail
alexandra.childs@uni-bielefeld.de
Phone
+49 521 106-2702
Office
VHF-345
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Prof. emeritus Fritz Trillmich

E-Mail
fritz.trillmich@uni-bielefeld.de
Phone
+49 521 106-2706
Office
VHF-221

Research Interests

  • Demography and reproductive strategy of sea lions
  • Parent-offspring conflict

Publications

We investigate life history- and reproductive strategies.

Sex, age at maturity, litter size, offspring size at birth and length of reproductive cycles count among important life history features. Reproduction represents one of the most important aspects in the life history of an individual and parental care represents one important component of fitness. One focus of our investigations concerns allocation decisions and trade-offs in parental care. As parental care is a valuable and limited resource, conflict about parental care is expected. Our investigations are carried out using guinea pigs, cavies and sea lions.

We focus on:

  • Plasticity of behaviour and physiology
  • Allocation decisions
  • costs of reproduction and brood care
  • parent-offspring conflicts
  • reproductive strategies of males and females
  • effects of an unpredictable environment (global warming) on population dynamics

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