Fish species diversity of Tagwai Dam (Longitude 6 o 39 to 6 o 44 East and Latitude 34 o to 9 o 37 North to Southwest of Minna were studied. The sampling was conducted fortnightly for three. Five species from five genera and five families were identified. These were Clupeidae, Cichlidae, Bagridae, Clarridae, Mochokidae and Cyprinidae. The total count for species during the sampling period was 13,773. Clupeidae were the most dominant species with a total counts of (7,897) while Labeo (Cyprinidae) had the least population. There were significant differences (P<0.05) in the weight of the samples of species obtained. There was also significant difference (P<0.05) between the Tilapia species and Clupeid species. However, but there was no significant difference (P> 0.05) among the species of Clarias, Synodontis and Labeo whose population were the lowest. Adoption of fish conservation and management strategies and enforcements of fisheries by-laws are necessary to improve the fishery resource of the Tagwai dam coupled with regular biodiversity study of the Dam.
A vital population of Physa acuta, a globally invasive species of freshwater gastropods was reported in Ivory Coast. Species identity was confirmed by conchological and anatomical methods. The occurrence of this population seems to be restricted to a single disturbed urban lake at Yamoussoukro, and physids occured in great abundances in this polluted lake. Physa acuta was associated with important amount of conductivity and TDS, and greater values of Fecal Coliforms. It likely that the species will further spread via active and/or passive dispersal across large distances, enhanced by environmental change.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.