Influence of brood size and offspring size on parental investment in a biparental cichlid fish,Neolamprologus moorii
- 112 Downloads
Both males and females ofNeolamprologus moorii, a substrate-spawning cichlid fish in Lake Tanganyika, tend their eggs and fry. In this study, the influence of brood size and fry size on parental investment of this species was examined under natural conditions. Breeding parents intensively attacked fry-eating fishes that approached their broods. The attack rate by the parents against the approaching fry-eaters was positively correlated with brood size and negatively with fry size, but was much more strongly related to brood size. This suggests that the parental decision for brood defense appeared to be primarily determined by brood size. The reason for fry size being less important in the parental decision may be that even large fry have a low survival ability on their own under the high predation pressure in the study sites.
KeywordsAttack Rate Brood Size Parental Investment Cichlid Fish Parental Decision
Unable to display preview. Download preview PDF.
- Brichard, P. 1989 Cichlids and all the other fishes of Lake Tanganyika. 544 pp. T. F. H. Publications, Hong Kong.Google Scholar
- Coleman, R.M., M.R. Gross & R.C. Sargent 1985 Parental investment decision rules: a test in bluegill sunfish.Behav. Ecol. Sociobiol. 18: 59–66.Google Scholar
- Colgan, P.W. & M.R. Gross 1977 Dynamics of aggression in male pumpkinseed sunfish (Lepomis gibbosus) over the reproductive phase.Z. Tierpsychol. 43: 139–151.Google Scholar
- Hori, M. 1987 Mutualism and commensalism in a fish community in Lake Tanganyika. In: S. Kawano, J.H. Connell, and T. Hidaka (eds.)Evolution and coadaptation in biotic communities, pp. 219–239. University of Tokyo Press, Tokyo.Google Scholar
- Kynard, B.E. 1978 Breeding behavior of a lacustrine population of threespine sticklebacks (Gasterosteus aculeatus).Behaviour 67: 178–207.Google Scholar
- Sargent, R.C. 1981 Sexual selection and reproductive effort in the threespine stickleback,Gasterosteus aculeatus. 85 pp. Ph. D. Thesis, State University of New York.Google Scholar
- Sargent, R.C. & M.R. Gross 1993 Williams’ principle: an explanation of parental care in teleost fishes. In: T.J. Pitcher (ed.)Behaviour of teleost fishes (2nd ed.), pp. 333–361. Chapman & Hall, London.Google Scholar
- Trivers, R.L. 1972 Parental investment and sexual selection. In: B. Campbell (ed.)Sexual selection and the descent of man 1871–1971, pp. 136–179. Aldine, Chicago.Google Scholar