Mugil cephalus is a permanent and abundant fish species in coastal, estuarine or lagoon ecosystems. This species was sampled in the lagoon of Grand-Lahou (Cote dIvoire) for the study of its diet and its feeding ethology. Stomachs were removed and their contents identified using identification keys to determine the diet. 88 specimens of M. cephalus were examined for food and feeding habits. 42 (47.72%) of the fish had empty stomach. Analysis of stomach contents showed that phytoplankton is the most consumed with a numerical percentage of occurrence of 94.98% (Cyanobacteria, Chlorophytes, Diatoms) and a percentage of occurrence is 64.9%. The proportion of zooplankton is 4.98% (cladocerans, copepods, foraminifera, rotifers and nematodes) according to the numerical percentage and 18.77% according to the frequency of occurrence. Detritus has an occurrence percentage of 8.43 %. Diet is mainly composed of diatom.

Study of the diet and feeding habits of 104 specimens of Liza dumerili (Steindachner, 1870) and 113 specimens of Liza falcipinnis (Valenciennes, 1836) coming from the artisanal fishing of the Grand-Lahou lagoon was carried out over the period from September 2008 to August 2009. Analysis of stomach contents revealed that these two species of fish feed mainly on diatoms and detritus. It appears that these species are phytoplanktonophagous and detritivores. The diet of Liza falcipinnis does not vary according to the size of the individuals. These two species specialize in the consumption of diatoms, particularly pennate diatoms.

Pseudotolithus elongatus est un poisson régulièrement rencontré dans les débarquements de la pêche artisanale et commerciale pratiquée en lagune Ebrié. Cependant, en Côte d’Ivoire aucune étude n’a encore été menée sur cette espèce bien qu’elle ait une valeur commerciale élevée et qu’elle soit beaucoup prisée par la population. Du fait de l'intérêt commercial que présente P. elongatus, l'étude de sa reproduction est nécessaire si l'on souhaite assurer la pérennité de l’espèce et satisfaire le consommateur. L’étude de la morphologie et de l’histologie des gonades a été basée sur la taille, la forme, la coloration la présence ou l’absence d’ovocytes mûrs, le diamètre des ovocytes et l’observation histologique. Les résultats obtenus ont révélé six stades de maturation des gonades avec une gamétogenèse continue observée chez cette espèce. L’ensemble de ces informations contribueront à pérenniser l’espèce par une gestion rationnelle du stock.   English title: Morphological and histological characteristics of the gonads of pseudotolithus elongatus (Bowdich, 1825), from Ebrié lagoon, Côte d’Ivoire Pseudotolithus elongatus is a fish regularly met in the landings of the artisanal and commercial fishing on Ebrie lagoon. However, in Ivory Coast no study has been conducted on this species although it has a high commercial value and it is very appreciated by the people. Because of the commercial interest of P. elongatus studying its reproduction is necessary if one wishes to improve operations in order to ensure the sustainability of the species and satisfy the consumer. The studies of gonads morphology and histology of Pseudotolithus elongatus was based on the size, shape, staining of the gonads, the presence or absence of ripe oocytes, the diameter of the oocytes and the histological observation. The results obtained indicate six stages of gonad maturation with continuous gametogenesis observed in this species. All of this information will contribute to perpetuate this species through rational management of the stock.