Feeding Habits of Bryconalestes tholloni (Pellegrin, 1901) (Characiformes: Alestidae) from Mafoubou River (Sous-Affluent of Niari River) in Congo Brazzaville  

作　　者：Isabelle Mady-Goma Dirat Durelle Brith Caëlle Olabi-Obath Marcellin Mikia Lilen Paty Dartevelin Boukama Isabelle Mady-Goma Dirat;Durelle Brith Caëlle Olabi-Obath;Marcellin Mikia;Lilen Paty Dartevelin Boukama(Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo;Faculty of Applied Sciences, University DENIS SASSOU-NGUESSO, Kintl, Congo)

机构地区：[1]Research Laboratory of Animal Biology and Ecology, Higher Normal School, University Marien NGOUABI, Brazzaville, Congo [2]Faculty of Applied Sciences, University DENIS SASSOU-NGUESSO, Kintl, Congo

出　　处：《Open Journal of Ecology》2024年第11期857-867,共11页生态学期刊（英文）

摘　　要：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 Bryconalestes 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.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 Bryconalestes 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.

关 键 词：Mafoubou River Bryconalestes tholloni Preponderance Index INSECTIVOROUS Congo Brazzaville 

分 类 号：Z88[文化科学]