ABSTRACT

The distribution and abundance of shell fish in Akor river in Ikwuano Local Government Area and Ihie river in Umuahia South Local Government both in Abia State were studied in this research. A total of 2 species of prawns, 3 species of periwinkles, 3 species of mussel, 5 species of crabs and 1 species of apple snail were collected from Akor river, Itunta with totals of 101 prawns, 131 crabs and 243 periwinkles, 49 mussels and 38 apple snails. Conversely, 2 species and a total of 29 crabs were collected from Ihie. There were more species distribution and abundance at Akor river than Ihie river. The species collected from Akor were by literature similar to species endemic in the coastal waters of Cross River and Akwa Ibom. It seems that there is an influx of shell fish from the marine and brackish waters of Cross River into Akor river. Physiochemical parameters of the stream suggests that the stream receives brackish water during rainy season and high tidal periods. The dearth of species in Ihie is indicative of the anthropogenic activities, perturbation and degradation of the previously popular Ihie river fishing ecosystem. This research shows that anthropogenic perturbations lead to reduction in river productivity and serious loss of shell fish populations. Moreover the species abundance in Akor is an asset that should be preserved and managed for sustainable yield