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Zooplankton diversity and its relationships with environmental variables in a West African tropical coastal lagoon (Ebrié lagoon, Côte d’Ivoire, West Africa)

Yao Saki Appiah, Raphaël N’doua Etilé, Kouakou Augustin Kouamé, Essetchi Paul Kouamélan

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J. Bio. Env. Sci.13(3), 1-16, September 2018

DOI: http://dx.doi.org/10.12692/ijb/20.2.1-20

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Interesting dynamics in the community structure of zooplankton after mortalities of the organism have been recently reported from Côte d’Ivoire. This study was carried out to examine the distribution and assemblage structure of zooplankton in relation to environmental parameters of Ebrié lagoon. Zooplankton samples were collected monthly from August 2015 to July 2016 in five sampling sites with a cylindro-conical net of 64 µm in mesh opening size in sectors IV and V near Dabou and Jacqueville department. Sampling observation showed of 59 taxa including 31 taxa of Rotifer (52.5 %), 11 Copepods (18.6 %), 3 taxa Cladocerans (5.08 %), 13 taxa of other zooplankton 22.03 %) and 1 taxa of Rhizopod (2 %). Copepod was the most abundant group (58.7 % of the total zooplankton abundance), followed by Rotifer (36.8 % of the total abundance) and other zooplankton (4.5 % of the total abundance). The main zooplankton specie was Acartia clausi (30.1 % of the total abundance). The seasonal variations of temperature, salinity, conductivity, TDS, pH, dissolved oxygen and phosphates influenced the abundance of species during the dry and rainy seasons. Zooplankton assemblages and composition were primarily due to change in water quality dependent on hydroclimatic changes and probably to anthropogenic actions. This suggests the need for real investigation of the Zooplankton biological capacity when formulating conservation and protection strategies for the sectors IV and V of Ebrié lagoon.


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Zooplankton diversity and its relationships with environmental variables in a West African tropical coastal lagoon (Ebrié lagoon, Côte d’Ivoire, West Africa)

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