Biodiversity of species of genus: Macrobrachium (Decapoda, Palaemonidae) in Lokoundje, Kienke and Lobe Rivers of South Region, Cameroon
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2015, Vol 7, Issue 1
Abstract
The diversity of freshwater prawns of the Genus: Macrobrachium was studied monthly from October 2010 to September 2011 in three rivers of Cameroon: Lokoundje, Kienke and Lobe Rivers, which are three of the most important shrimping areas for artisanal fishermen in the coastal communities of Cameroon. 1337 specimens were examined and their morphometric and meristic characters recorded, alongside the physico-chemical characteristics of the river water. Six species of Macrobrachium were identified based on morphology: M. vollenhovenii (Herklots, 1857); M. macrobrachion (Herklots, 1851); M. sollaudii (De Man, 1912); M. dux (Lenz, 1910); M. chevalieri (Roux, 1935) and M. felicinum (Holthuis, 1949). M. vollenhovenii was the most dominant species (52%) and M. felicinum, the least (1%). Except in M. sollaudii, females were dominant. Based on morphological similarity, two main species groups were identified using Hierarchical Ascending Classification. They were Group 1: M. vollenhovenii and M. macrobrachion; Group 2: the other four species. Group 2 formed 2 sub-groups: M. sollaudii and M. dux formed sub-group 1 while M. chevalieri and M. felicinum formed sub-group 2. It is significant to note that this is the first time M. felicinum and M. dux are described in Cameroon. The study shows that Cameroon may be more species-rich than previously recorded. It is therefore recommended that the species richness of Macrobrachium be investigated in other rivers and that the aquaculture of the most promising commercial species is initiated. This will reduce continuous harvesting of the wild species, thus ensuring the conservation of the species and resource sustainability.
Authors and Affiliations
Judith G. Makombu, Benedicta O. Oben, Pius M. Oben, Ndelle Makoge, Elie W. Nguekam, Guillaume L. P. Gaudin, Isabelle S. Motto, Koffi M. Konan, Janet H. Brown, Jules R. Ngueguim, Eric Mialhe8and Randall E. Brummett
Keywords
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