Diets of Alestidae (Teleostei: Characiformes) in Two Rivers (Boumba and Kadei) in Eastern Cameroon
Sandrine Jueya, Gifty A-T Attu, Leandro Castello, Emmanuel Frimpong, David Nguenga, Arnold R Bitja Nyom
The dietary ecology of the Alestidae fishes was studied from two rivers, Boumba and Kadei, in eastern Cameroon. A total of 106 (individual) fish specimens including five species in the Boumba (Alestes macrophthalmus, Brycinus macrolepidotus, Brycinus longipinnis, Bryconaethiops sp. and Hydrocynus vittatus) and four species in the Kadei (A. macrophthalmus, B. macrolepidotus, Brycinus imberi and H. vittatus) was monthly collected monthly from December 2018 to May 2019. The stomach contents of these fish were analyzed using Corrected frequency of Occurrence (Fc), Percentage by Weight (P) and Index of preponderance (Ip). Qualitative analysis of all of these stomach contents reveals that the diet of fish hovers around four food categories: prey fish, macroinvertebrates, macrophytes, and other unidentifiable particles. Depending on their food preferences, the Alestidae of the Boumba and the Kadei rivers were placed into two groups: carnivores and omnivores. Although their eating habits may vary significantly and / or not with the size of individuals, diet overlap exists among omnivorous diet species. In addition, some Alestidae (Alestes macrophthalmus, Brycinus macrolepidotus) adapt their diets according to the quality and quantity of resources available in their living environment.
Sandrine Jueya, Gifty A-T Attu, Leandro Castello, Emmanuel Frimpong, David Nguenga, Arnold R Bitja Nyom. Diets of Alestidae (Teleostei: Characiformes) in Two Rivers (Boumba and Kadei) in Eastern Cameroon. International Journal of Zoology Studies, Volume 7, Issue 1, 2022, Pages 96-108