Preliminary Studies on Some Physico-Chemical Parameters and Fish Species Composition of Doma Dam in Doma L.G.A, Nasarawa State, Nigeria

摘要

Study of some physico-chemical parameters and fish species composition of Doma Dam was carried out between the month of August-October 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-chemical parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48°C for temperature, 7.03-7.64 for pH, 7.23-7.64 mg L-1 for Dissolved Oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17 mg L-1 for alkalinity and 79.17-80.58 mg L-1 for total hardness. The result indicated that there was significant difference (0.5) for depth, temperature turbidity and alkalinity, while there was no significant difference (0.05) for DO, pH and water hardness among the stations. The result of these parameters among the durations show that there was significant differece (0.05) in all the parameters except pH. The study revealed that there were twenty five fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three species each. While the familys Polypteridae, Channidae, Centropomidae, Hepsetidae and Protopteridae has the lowest number of one each. The overall result revealed that the physico-chemical parameters were mostly influenced by duration and not much by stations and the parameters measured within the recommended water quality requirement for growth and survival of aquatic organisms.