Ecologie benthique de la Lagune Ebrié. Détermination du rapport de stabilité biocoenotique (RSB)

The 1912 Jaccard index modification led to the formulation of the Biocoenotic Stability Report (BSR). It is another similarity index based on the evaluation of two opposite ecological states affecting both compared biotopes.

Synopsis de la classification des larves et des nymphes de diptères chironomidae des ecosystèmes dulçaquicoles de l'Afrique de l'Ouest: clés de détermination des sous-familles, des tribus et des genres

Synopsis of this numerically very important Diptera category, which is dominant and consequently of relevance in most aquatic environments.

Ecologie benthique de la Lagune Ebrié. Théorie sur la méthode du DR' pour la mise en évidence de biocoenoses

The theoretical aspect of the DR' method was presented. It suggestes the association of some characteristic transects, the organisms of which will be used to describe the first biocoenoses of the Ebrié lagoon.

Détermination de l'âge des machoirons (Chrysichtys nigrodigitatus): première estimation de la croissance

Study of C. nigrodigitatus slices showed evidence of seasonal formation related to rainfall and could be used for ageing. A first estimation of the growth has thus been made.

Croissance et détermination de l'âge par lecture d'écailles d'un poisson plat de Côte d'Ivoire, Cynoglossus canariensis (Steind. 1882)

Cynoglossus canariensis has a very rapid growth. The rate of the males is 0,36 and the female one is 0,32. The asymptotic size is 55,0cm for the females and 50,5cm for the males. Females and males younger than three years (40cm), which represent 90 per cent of the Côte d'Ivoire stock have a similar growth, so the average equation: Lt=53,5 (1-e -0,34(t+1)) will be used.