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How dispersal influences parent–offspring conflict over investment

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  • Bram Kuijper
  • Rufus A. Johnstone

Abstract

Models that investigate family conflicts over parental investment have generally ignored population structure above the level of the family. Here, we extend conventional models to assess the impact of spatial population structure and limited dispersal on the intensity and resolution of parent–offspring conflict. Although one might naively predict that limited dispersal should reduce parent–offspring conflict, due to increased local relatedness, we show that this is not necessarily the case. Parent–offspring conflict may actually become more intense when dispersal is limited because local competition among related young can reduce the cost of any decline in maternal productivity, favoring greater selfishness on the part of the offspring. We also investigate the impact of limited dispersal on the resolution of parent–offspring conflict when the young can solicit extra resources by means of costly begging. Our model predicts that begging will be more intense when dispersal is limited but that the impact of dispersal on size then depends on the effect of parental supply on offspring demand. When greater supply leads to reduced demand, we find that parental investment should be higher in more viscous populations. By contrast, when greater supply leads to greater demand, parental investment should be lower in more viscous populations.

Suggested Citation

  • Bram Kuijper & Rufus A. Johnstone, 2012. "How dispersal influences parent–offspring conflict over investment," Behavioral Ecology, International Society for Behavioral Ecology, vol. 23(4), pages 898-906.
    • Handle: RePEc:oup:beheco:v:23:y:2012:i:4:p:898-906.
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    File URL: http://hdl.handle.net/10.1093/beheco/ars054
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    References listed on IDEAS

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    1. Per T. Smiseth & Clare Andrews & Erica Brown & Pamela M. Prentice, 2010. "Chemical stimuli from parents trigger larval begging in burying beetles," Behavioral Ecology, International Society for Behavioral Ecology, vol. 21(3), pages 526-531.
    2. Ulrich K. Steiner & Anthony J. Gaston, 2005. "Reproductive consequences of natal dispersal in a highly philopatric seabird," Behavioral Ecology, International Society for Behavioral Ecology, vol. 16(3), pages 634-639, May.
    3. John M. McNamara & Alasdair I. Houston & Zolta´n Barta & Jose´-Luis Osorno, 2003. "Should young ever be better off with one parent than with two?," Behavioral Ecology, International Society for Behavioral Ecology, vol. 14(3), pages 301-310, May.
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