The silver spoon effect and habitat selection by natal dispersers

Ecol Lett. 2006 Nov;9(11):1179-85. doi: 10.1111/j.1461-0248.2006.00972.x.

Abstract

The silver spoon effect in the context of habitat selection occurs when dispersers in good condition are more likely to settle in high-quality habitats than dispersers in poor condition. Positive relationships between disperser condition and the quality of post-dispersal habitats are predicted by at least two non-exclusive ultimate hypotheses. The competition hypothesis assumes that a disperser's condition affects its chances of competing for space or joining an established group after arriving at a high-quality habitat, while the search hypothesis assumes that a disperser's condition affects its selectivity, and hence its chances of accepting a lower-quality habitat when it is searching for a new habitat. Thus far, silver spoon effects in the context of habitat selection have been reported in only a handful of species (several birds and marine invertebrates), but this study suggests that they may be relatively common in particular species and situations.

MeSH terms

  • Animal Migration / physiology*
  • Animals
  • Birds / physiology
  • Demography
  • Ecosystem*
  • Invertebrates / physiology
  • Time Factors