Do savannah sparrows commit the concorde fallacy?
- 136 Downloads
The nest defense behavior of a tundra population of savannah sparrows (Passerculus sandwichensis) was examined to determine the relative importance of past investment and future prospects in determining the observed patterns.
A comparison of birds initiating nests at various times of the breeding season indicated that the change in renesting potential within a breeding season had little influence on the birds' behavior.
For a monomorphic, monogamous passerine the prospective reproductive success for males and females is expected to be quite similar. However, the respective patterns of nest defense behavior differed considerably (Figs. 1 and 2) and most closely reflected past investment. These results are discussed in light of parental investment theory.
KeywordsReproductive Success Breeding Season Future Prospect Parental Investment Defense Behavior
Unable to display preview. Download preview PDF.
- Barash, D.P.: Evolutionary aspects of parental behavior: The distraction behavior of the alpine accentor, Prunella collaris. Wilson Bull. 87, 367–373 (1975)Google Scholar
- Boucher, D.H.: On wasting parental investment. Am. Nat. 111, 786–788 (1977)Google Scholar
- Dawkins, R., Carlisle, T.R.: Parental investment, mate desertion and a fallacy. Nature 262, 131–133 (1976)Google Scholar
- Maynard Smith, J.: Parental investment: A prospective analysis. Anim. Behav. 25, 1–9 (1977)Google Scholar
- Potter, P.E.: Territorial behavior in savannah sparrows in south-eastern Michigan. Wilson Bull. 84, 48–59 (1972)Google Scholar
- Stobo, W.T., McLaren, I.A. The Ipswich sparrow. Halifax: Nova Scotia Institute of Science 1975Google Scholar
- Trivers, R.L.: Parental investment and sexual selection. Campbell, B. (ed.), pp. 136–179. Sexual selection and the descent of man 1871–1971. Chicago: Aldine 1972Google Scholar
- Weatherhead, P.J.: Ecological correlates of monogamy in tundra-breeding savannah sparrows. Auk (in press) (1979)Google Scholar
- Welsh, D.A.: Savannah sparrow breeding and territoriality on a Nova Scotia dune beach. Auk 92, 235–251 (1975)Google Scholar