Depth-related differences in territory size and defense in the herbivorous cichlid,neolamprologus moorii, in lake tanganyika
- 72 Downloads
Neolamprologus moorii, a small herbivorous cichlid of Lake Tanganyika, defends its territory against food competitors. Territory size and territorial defense were compared between two sites at different depths. In the shallow site, more fishes intruded into the territories than in the deep site, owing to the higher density fish population in the former. The territory holders in the shallow site attacked intruders more often, although the ratio of attacks to number of intruders was similar to that of the deep site. The territories in the deep site were larger and contained a greater amount of algae than the shallow site. The larger territory size in the deep site may have resulted from the lower cost of territory defense due to the lower competitor density and from the need to maintain a greater amount of food resources to compensate for lower algal productivity.
Key wordsTerritory defense territory size food resources food competitor cichlid
Unable to display preview. Download preview PDF.
- Brichard, P. 1989. Cichlids and all the other fishes of Lake Tanganyika. T. F. H. Publications, Hong Kong, 544 pp.Google Scholar
- Ito, Y., N. Yamamura and M. Shimada. 1992. Animal ecology. Soju Shobo, Tokyo, 507 pp. (In Japanese).Google Scholar
- Karino, K. 1997. Influence of brood size and offspring size on parental investment in a biparental cichlid fish,Neolamprologus moorii. J. Ethol., 15: 39–43.Google Scholar
- Kohda, M. 1991. Intra-and interspecific social organization among three herbivorous cichlid fishes in Lake Tanganyika. Japan. J. Ichthyol., 38: 147–163.Google Scholar
- Kohda, M. 1997. Interspecific society among herbivorous cichlid fishes. Pages 105–120in H. Kawanabe, M. Hori and M. Nagoshi, eds. Fish communities in Lake Tanganyika, Kyoto University Press, Kyoto.Google Scholar
- Krebs, J. R. and N. B. Davies. 1993. An introduction to behavioural ecology, 3rd ed. Blackwell Scientific Publications, Oxford, 420 pp.Google Scholar
- Kuwamura, T. 1987. Distribution of fishes in relation to the depth and substrate at Myako, east-middle coast of Lake Tanganyika. Afr. Stud. Monogr., 7: 1–14.Google Scholar
- Kuwamura, T. and K. Karino. 1991. Vertical distribution of fishes on the rocky shore of Kasenga, southern Lake Tanganyika. Ecol. Limnol. Lake Tanganyika, 7: 18–20.Google Scholar
- Takamura, K. 1988. The first measurement of the primary production of epilithic algae in Lake Tanganyika. Physiol. Ecol. Japan, 25: 1–7.Google Scholar
- Warner, R. R. 1991. The use of phenotypic plasticity in coral reef fishes as tests of theory in evolutionary ecology. Pages 387–398in P. F. Sale, ed. The ecology of fishes on coral reefs. Academic Press, San Diego.Google Scholar
- Wootton, R. J. 1990. Ecology of teleost fishes. Chapman and Hall, London. 404 pp.Google Scholar