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Articles by Adama Oueda
Total Records ( 2 ) for Adama Oueda
  Adama Oueda , Wendengoudi Guenda , Andre T. Kabre , Frederic Zongo and Gustave B. Kabre
  From May 2004 to April 2005, the zooplankton of the Loumbila reservoir was subject to a 14 days periodicity follow-up. This study attempt to describe the diversity, abundance and seasonal dynamic of zooplankton community in a south-saharian reservoir. Plankton community was sampled with horizontal tows of a plankton net of 100 μm mesh size. The samples analysis permitted to identify 7 species of Cladocera and 2 species of the Copepoda. The overall Rotifers observed belong to 14 genera. The Cochran`s Q-test together with various methods of variance analyses and the Redundancy Analysis (RDA) allowed to highlight the seasonal dynamics of zooplankton settlement. The most significant factor in this dynamics is water movement i.e., water gain or loss in the reservoir. This factor evolves together with some physicochemical parameters favourable to plankton development and simultaneously opposes some other unfavourable factors such as high conductivity. Crustaceans are more sensitive to the season impacts than Rotifers. Besides this seasonal variability the zooplankton community of Loumbila reservoir also shows variability according to depth.
  Adama Oueda , Wendengoudi Guenda , Allassane Ouattara , Germain Gourene , Bernard Hugueny and Gustave B. Kabre
  Fish diet, feeding patterns and trophic interactions were studied according to season in a Sahelo-Soudanian man-made lake (Loumbila, Burkina Faso). Some food resources (zooplankton and benthic fauna) were also sampled. An examination of 425 non-empty stomachs belonging to 6 species showed that Auchenoglanis occidentalis, Clarias anguillaris and Schilbe intermedius varied their diets and feeding strategies from one season to another. These species adapt their feeding strategies to the seasonal food availability. The three other species (Brycinus nurse, Oreochromis niloticus and Tilapia zillii) showed constant specialisation in the same prey items. Diets overlaps were low during the wet season and Resource Breadths more or less higher. Thus diminution in food availability in the dry season appears to induce shortage of resources used by individuals and by whole populations, leading to an increased likelihood of competition between species. The changes in fishes feeding patterns within the year are an adaptive response to change in food availability and allow fish communities to make better use of available resources.
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