Biosciences Seminar Series - Autumn 2017
30 November 2017 - 1pm - Zoology Museum
Social structure and life-history evolution in resident killer whales
Dr Daniel Franks
University of York, UK
Photo by Dr Dan Franks
Abstract
Why females of some species cease ovulation before the end of their natural lifespan is a longstanding puzzle in life-history evolution. In humans, as well as some natural populations of cetaceans and insects, reproductive aging occurs much faster than somatic aging and females exhibit prolonged post-reproductive lifespans (PRLSs). Determining the mechanisms and functions that underpin PRLSs has proved a significant challenge. Here I bring together both classic and modern hypotheses proposed to explain PRLSs and life-history evolution and discuss their application with particular reference to our studies of killer whales. In doing so I highlight the need to consider multiple interacting explanations for the evolution of PRLSs and discuss the key role of social structure.
Hope to see many of you - everyone most welcome to attend!
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| Photo by Dr Dan Franks |
Why females of some species cease ovulation before the end of their natural lifespan is a longstanding puzzle in life-history evolution. In humans, as well as some natural populations of cetaceans and insects, reproductive aging occurs much faster than somatic aging and females exhibit prolonged post-reproductive lifespans (PRLSs). Determining the mechanisms and functions that underpin PRLSs has proved a significant challenge. Here I bring together both classic and modern hypotheses proposed to explain PRLSs and life-history evolution and discuss their application with particular reference to our studies of killer whales. In doing so I highlight the need to consider multiple interacting explanations for the evolution of PRLSs and discuss the key role of social structure.
Hope to see many of you - everyone most welcome to attend!
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