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Diversity and Spatiotemporal distribution of the Ichtyofauna of an Urban Natural Environment: Mfilou River, Brazzaville - Congo

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Author Affiliations

  • 1Laboratory of Animal Biology and Ecology Research, Superior Normal School, University Marien Ngouabi PoB 69 Brazzaville, CONGO Faculty of Sciences and Techniques, University Marien Ngouabi PoB 69 Brazzaville, CONGO
  • 2Laboratory of Animal Biology and Ecology Research, Superior Normal School, University Marien Ngouabi PoB 69 Brazzaville, CONGO
  • 3Laboratory of Animal Biology and Ecology Research, Superior Normal School, University Marien Ngouabi PoB 69 Brazzaville, CONGO Faculty of Sciences and Techniques, University Marien Ngouabi PoB 69 Brazzaville, CONGO
  • 4Laboratory of Animal Biology and Ecology Research, Superior Normal School, University Marien Ngouabi PoB 69 Brazzaville, CONGO Faculty of Sciences and Techniques, University Marien Ngouabi PoB 69 Brazzaville, CONGO

Res. J. Animal, Veterinary and Fishery Sci., Volume 2, Issue (3), Pages 1-10, March,24 (2014)

Abstract

Mfilou River is a waterway located in south districts of Brazzaville, this river constitutes a site of economic and scientific interests, because of many activities which take place there (fishing, maraichage, breeding and military activities). The inventory of ichthyofauna of three stations, from the period of March 2008 to May 2009, reveals the presence of 38 species regrouped in 24 genera, 11 families and 7 orders. The specific richness varies from 18 to 36 species. The Shannon index oscillates between 2,24 and 3,05 with a raised value in station 1 (confluence with Djoue River). This tendency shows the influence of Djoue river in the diversification and the distribution of species along the river. The equitability varies between 0,78 and 0,87, these values indicate an homogeneous repartition. Station 2 (less anthropized) presents some seasonal particularities marked in dry season by abundance of species which are occasional or accidental in other stations. Station 1 presents a greater specific richness and specific diversity in spite of important human activity and the bad water quality. Species are more diversified in rainy season. Fishes population of Mfilou River is balanced and distributed in a homogeneous way on the whole stream. It is also interesting to notice that some species of fishes captured occasionally in Mfilou River may come from Djoue River. These big spatiotemporal variabilities of fishes communities and the significant similarities observed between the sampling stations of Mfilou River during different seasons remain to re-specify.

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