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Sustainable management of migratory species: Challenge or utopia?

The RESSOURCE Project, a case study on waterbirds wintering in the Sahel









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    Sustainable management of migratory species: Challenge or utopia?
    The RESSOURCE Project, a case study on waterbirds wintering in the Sahel
    2021
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    Millions of people depend on Sahelian wetlands for their livelihoods. These ecosystems provide essential ser- vices to local communities and are also home to many waterbirds. Climate change, water and agricultural de- velopments and the intensive exploitation of natural resources are threatening these fragile habitats, which has led to a dramatic decrease of 40 percent in waterbird populations in the region between 1960 and 2000.7 If the waterbirds were to disappear from this region, many rural communities would be deprived of an im- portant source of food. The RESSOURCE Project was launched in 2017 to tackle the challenges facing people and migratory birds in Egypt, Mali, Senegal, Sudan and Chad. This initiative works with national authorities and local communities to: • improve knowledge on waterbirds populations and their Sahelian wetlands habitats as well as on the major threats to their conservation; • develop innovative solutions for the sustainable management of waterbirds populations and their Sahe- lian habitats.
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    Shesher and Welala FloodplainWetlands (Lake Tana, Ethiopia):Are They Important Breeding Habitats for Clarias gariepinus and theMigratory Labeobarbus Fish Species? 2012
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    This study aims at investigating the spawning migration of the endemic Labeobarbus species and C. gariepinus from Lake Tana, through Ribb River, to Welala and Shesher wetlands. The study was conducted during peak spawning months (July to October, 2010). Fish were collected through overnight gillnet settings. A total of 1725 specimens of the genus Labeobarbus (13 species) and 506 specimens of C. gariepinus were collected. Six species of Labeobarbus formed prespawning aggregation at Ribb Riv er mouth. However, no Labeobarbus species was found to spawn in the two wetlands. More than 90% of the catch in Welala and Shesher wetlands was contributed by C. gariepinus. This implies that these wetlands are ideal spawning and nursery habitats for C. gariepinus but not for the endemic Labeobarbus species. Except L. intermedius, all the six Labeobarbus species (aggregated at Ribb River mouth) and C. gariepinus (spawning at Shesher andWelala wetlands) were temporally segregated.
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