- Title
- Reproductive biology of ningu, Labeo victorianus (pisces: cyprinidae), in the kagera and Sio rivers, Uganda
- Creator
- Rutaisire, Justus, Booth, Anthony J
- Date
- 2005
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/125864
- Identifier
- vital:35827
- Identifier
- https://doi.10.1007/s10641-004-5564-8
- Description
- We investigated aspects of the reproductive biology of the cyprinid fish, Labeo victorianus, locally known as ningu, in the Kagera and Sio Rivers, Uganda. These rivers represent the last remaining refuges for this species within Uganda. L. victorianus is a highly fecund, potamodrometic fish that migrates upstream to spawn. Spawning is generally synchronised with the bimodal water level maxima observed within the rivers. There were, however, some deviations from this pattern. We caught sexually mature fish throughout the year in the Sio River, and noticed that spawing started before the second rainfall peak. Fish from the Kagera matured at significantly larger sizes than fish from the Sio River. Male and female fish, from both rivers, fed intensively during the non-breeding months accumulating significant fat reserves; a probable energy storage mechanism prior to their spawning migrations. The differences between the populations is probably a phenotypic response to differing abiotic factors such as river size, flow velocity and food availability.
- Format
- 10 pages, pdf
- Language
- English
- Relation
- Environmental Biology of Fishes, Rutaisire, J. and Booth, A.J., 2005. Reproductive biology of ningu, Labeo victorianus (pisces: cyprinidae), in the kagera and Sio rivers, Uganda. Environmental Biology of Fishes, 73(2), pp.153-162, Environmental Biology of Fishes volume 73 number 2 153 162 2005 0378-1909
- Rights
- Environmental Biology of Fishes
- Rights
- Use of this resource is governed by the terms and conditions of the SpringerLink Terms of Use Statement ( https://link.springer.com/termsandconditions)
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Booth, Anthony John (Prof)
RU Department of Ichthyology and Fisheries Science
SDG 14. Life Below Water
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