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Feeding Habits of Bryconalestes tholloni (Pellegrin, 1901) (Characiformes: Alestidae) from Mafoubou River (Sous-Affluent of Niari River) in Congo Brazzaville
Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
Faculty of Applied Sciences, University DENIS SASSOU-N’GUESSO, Kintélé, Congo
- 1 Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
- 2 Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
- 3 Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
- 4 Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo
- 5 Faculty of Applied Sciences, University DENIS SASSOU-N’GUESSO, Kintélé, Congo
Open Journal of Ecology·Volume 14 (2024)·Pages 857–867·Published 5 November 2024·DOI10.4236/oje.2024.1411049
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Abstract
The diet of Bryconalestes tholloni from Mafoubou River, Sous-affluent of Niari River was studied by examining the stomach contents of 75 specimens captured using the cast nets. This study is the first realized on the trophic ecology of a fish species of Niari Basin. Three stations were sampled monthly from July to December 2019. The diet was analyzed according to hydrological season and fish size. The vacuity coefficient is 27%, feeding habits of Bry conalestes tholloni were analyzed using the preponderance index which combines the occurrence percentage and the weight percentage. Bryconalestes tholloni is insectivorous (Ip = 95.54%) and becomes omnivorus to predominantly frugivorous, the preponderance index of fruits is equal to 93.6% in large individuals. There is no variation in diet according to the season. These results constitute a first database on the feeding habits Niari Basin fishes.
KeywordsMafoubou RiverBryconalestes tholloniPreponderance IndexInsectivorousCongo Brazzaville
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