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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Food and feeding habits of Haplochromis (Teleostei : Cichlidae) from lake Kivu (Central Afrika). II. Daily feeding periodicity and dietary changes of some Haplochromis species under natural conditions.

AP ULYEL, F OLLEVIER, R CEUSTERS and DT VANDENAUDENAERDE (1992)

Food and feeding habits of Haplochromis (Teleostei : Cichlidae) from lake Kivu (Central Afrika). II. Daily feeding periodicity and dietary changes of some Haplochromis species under natural conditions.

BELGIAN JOURNAL OF ZOOLOGY, 122(1):93-112.

The feeding periodicity and dietary changes of Haplochromis graueri, H. olivaceus, H. nigroides and H. kamiranzovu, 4 endemic species from lake Kivu, were investigated by determining the stomach fullness index at intervals of 3 hours over a 24-hour cycle. These 4 species showed 2 types of daily feeding activity rhythm both characterised by a major food intake at daytime. A first type of bimodal feeding rhythm with the first peak situated in the morning between 6.00 a.m. and 12.00 a.m. and a second one in the evening between 3.00 and 9.00 p.m. characterizes H. graueri, and H. olivaceus. H. kamiranzovu and H. nigroides on the other hand showed a unimodal feeding rhythm with a single peak situated in the afternoon between 3.00 and 6.00 p.m. The beginning of each period of active foraging is rather easily detected in catches by a rapid rise in number of fish captured. The highest degree of stomach fullness appears almost invariably about 3 hours after the beginning of such a foraging peak. The variation of the coefficient of vacuity in the various Haplochromis species studied is not only related to the dial feeding rhythm but also to the items ingested : it is higher in carnivorous species and lower in omnivorous, detritivorous and phytophagous ones. The relation between the uptake of various prey types and feeding time over the 24 h period indicates that some prey items are more accessible at specific hours of the day. These Haplochromis species have developed a strategy for cropping potential food items at specific periods of the day. This probably leads to a further reduction or in some cases to a complete absence of interspecific food competition.

FEEDING PERIODICITY; FOOD AND FEEDING HABITS; HAPLOCHROMIS; CICHLIDAE; LAKE KIVU
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
1923-1989
Annales de la Société Royale Zoologique de Belgique
 
1989-
Belgian Journal of Zoology