Abstract
The spawning season of Oreochromis niloticus females was studied over two annual cycles in 6 small agropastoral and 2 large hydroelectric reservoirs of Côte d'Ivoire (Ayamé and Kossou), situated between 5 and 10°N of latitude. Reproduction occurred during a marked season in the agropastoral reservoirs and in Lake Ayamé, whereas it was continuous in Lake Kossou. Spawning season differed between reservoirs and among years within the same reservoir. Seasonal changes in temperature, rainfall, day length, chlorophyll a concentration and water level often corresponded with changes in the annual spawning cycle. However, annual periodicity of O. niloticus reproduction was more likely influenced by the ephemerides cycle.
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Duponchelle, F., Cecchi, P., Corbin, D. et al. Spawning Season Variations of Female Nile Tilapia, Oreochromis niloticuss, From Man-made Lakes of Côte D'Ivoire. Environmental Biology of Fishes 56, 375–387 (1999). https://doi.org/10.1023/A:1007588010824
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DOI: https://doi.org/10.1023/A:1007588010824