Abstract
The West African manatee (Trichechus senegalensis) is classified as vulnerable on the IUCN red list and is highly protected in Gabon. Gabon could be home to one of the highest densities of manatees remaining in Africa. Many people agree on the presence of manatee populations in several lakes and lagoons in Gabon. The aim of this study is to investigate the distribution and abundance of manatees by monitoring. The study was carried out in the catchment area of Lake Cachimba at the Setté Cama Ramsar site. We used three data collection methods: secondary data collection, boat surveys and surveys of markets and landing sites. Data analysis was based on descriptive statistics, manatee encounter rates and carcass encounter rates (number of carcasses/km of river). The chi-square (χ2) goodness-of-fit test was used to determine whether there were significant differences in the abundance of manatee encounter rates between Lake Cachimba and the Mbissi River. The results showed that manatee hotspots in Lake Cachimba are located near the mouth of the DuebiRiver, along the shore of the village of Cachimba. In addition, fishing activities are a potential threat to the African manatee.
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