Abstract
The feeding ecology of Raiamas moorei, Enteromius kerstenii, and Enteromius pellegrini was studied as a contribution to the comprehension of the ecological functioning of Lake Kivu, especially its littoral zone. Fish specimens were collected during 68 fishing campaigns from 2007 to 2017 among which are 25 campaigns 24-h full daily cycles and 43 overnights campaigns. Morphometric parameters and gut contents of all fish individuals were sampled and analyzed. For Enteromius spp., entomophagy is the main strategy as they are revealed to feed mainly on insects while R. moorei combines two different prey categories: insect and fish. The reasons of this partial food partitioning among these three species are discussed. The observed feeding behaviors of these species indicate that they could compete with the new invader Lamprichthys tanganicanus and with some cichlids such as Haplochromis vittatus which inhabit the littoral zone.
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Acknowledgments
We wish to thank especially our students Denise Waasalo, Mukucha, Bitangacha, and Igilima for field assistance. We also highly thank two anonymous reviewers for their suggestions that substantially helped to improve the manuscript. Many thanks to Els De Keyzer for substantial improvement of the English language and grammar of this manuscript.
Funding
Part of the field of this study was supported by The Lake Kivu Monitoring Program (LKMP) through the “Ecologie du Littoral du Lac Kivu” (ECOLIT) Project.
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Masilya, M.P., Muvundja, F.A., Isumbisho, M. et al. Food and feeding habits of Raïamas moorei Boulenger 1900, Enteromius pellegrini (Poll, 1939), and Enteromius kerstenii (Peters, 1868), three cyprinid species of Lake Kivu (East Africa). Environ Biol Fish 103, 635–645 (2020). https://doi.org/10.1007/s10641-020-00965-w
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DOI: https://doi.org/10.1007/s10641-020-00965-w