Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 73: 6012 - 6019 Published January 31, 2014.
Characterization
of a Freshwater Crab Sudanonautes aubryi (Potamonautidae, Brachyura
Bott, 1955) of Ngamboulou River in Brazzaville
1Mady-Goma Dirat I.*1, Kouhoueno–Balembonsoni A. G.1 and Vouidibio J.2 1Research Laboratory of Animal Biology and Ecology, Superior Normal School, University Marien Ngouabi PoB 69 Brazzaville Congo
2Faculty of Sciences and Techniques, University Marien Ngouabi - PoB 69 Congo Brazzaville
*Correspondent author: isadir2007@yahoo.fr
Original submitted in on 21st November 2013 Published online at www.m.elewa.org on 31st January 2014.
ABSTRACT
Objective:
Crustaceans, like all Congolese benthic macro invertebrates inland
waters are poorly known. Bioindicators and intermediate hosts of
trematodes, they are also an excellent food source. A preliminary
characterization of a common species of freshwater crabs Sudanonautes
aubryi (Bott, 1955) was conducted near the Ngamboulou River (tributary
of Mfilou River) through the botanic test garden of University Marien
Ngouabi from April 2005 to August 2008. This morphometric study was
undertaken to describe this species.
Methodology and results: The soil was handset at a depth of 15cm, crabs collected by hand, were cleaned in 10l and preserved in alcohol 70°. 186 specimens have been identified and measured, the results show that the sex ratio is equal to 1.62, and the average weight is 6.3g. The average weight of females (8.13g) is higher than that of males (5.03g). The average width of the carapace is 25.73 mm; the carapace of the female is larger (30.18mm) than males (22.99mm). The average length of the clip is 18.66mm. It also appears that females were greater (22.68mm) than males (17.42mm) clip. Ovigerous females were observed between July and September.
Conclusion and application of results: These results will provide a database for management of macro invertebrates’ conservation of Brazzaville Department and of the right bank Congo Basin.
Keywords: Congo Brazzaville, Ngamboulou River, Brachyura, Sudanonautes aubryi, characterization
Methodology and results: The soil was handset at a depth of 15cm, crabs collected by hand, were cleaned in 10l and preserved in alcohol 70°. 186 specimens have been identified and measured, the results show that the sex ratio is equal to 1.62, and the average weight is 6.3g. The average weight of females (8.13g) is higher than that of males (5.03g). The average width of the carapace is 25.73 mm; the carapace of the female is larger (30.18mm) than males (22.99mm). The average length of the clip is 18.66mm. It also appears that females were greater (22.68mm) than males (17.42mm) clip. Ovigerous females were observed between July and September.
Conclusion and application of results: These results will provide a database for management of macro invertebrates’ conservation of Brazzaville Department and of the right bank Congo Basin.
Keywords: Congo Brazzaville, Ngamboulou River, Brachyura, Sudanonautes aubryi, characterization
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