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Assessment of some water quality parameters and zooplankton periodicity of the Baga in-take channel of Lake Chad was reviewed. Seven different species of zooplankton were identified at the two sampling stations of the channel. Each identified zooplankton species were grouped according to its major group of Copepods, Cladocera and Rotifera. The copepods dominated the total population with the highest number of occurrence as Cyc1opoids species. There was a mark evidence of organic manure nutrient on total zooplankton population. Surface water temperature in station 1 ranged from 22.8-28. 1degreesC the pH ranged from 6.10 - 7.12 while D.O ranges from 4.00mg/1 -6.20 mg/I. At station 2, temp ranged from 22.0-28.1 OdegreesC, pH ranged 7.1 - 8.6 while D.O. ranged from 4.00mg/1 - 6.20mg/1.

Study on the growth and percentage survival of seasonal induced breeding was carried out at the Federal College of Freshwater Fisheries Technology Baga. About 40,414 fingerlings were produced with percentage survival of 81.1 % at water temperature of 28degrees C between April and May, 2009. The average weight of fingerlings produced was 1.54 g with average standard and total length of 3.0 cm and 3.5 cm respectively. However, environmental factors that could hinder mass production of Dutch Clarias fry/fingerlings stocked at low and high stocking densities were monitored for eight weeks at 3.6 m2 indoor concrete tanks with water aeration using flow-through system. The percentage survival of 83.5% and 92.5% were obtained after the period of 8 weeks. The fry/fingerlings were fed with Artemia mixed with powdered feed of 35 % crude protein. The study shows that for Dutch Clarias fry/fingerlings production and management, smaller concrete tanks with flow-through mechanism are required and 3.6 m2 should not be stocked with more than 3,500 fingerlings per tank in the first 8 weeks before transferring them to production ponds. It was observed that apart from efficient water aeration, constant feeding and sampling of fingerlings will increase growth rate, increase resistance to disease and uniformity in size of the Dutch Clarias. The mean water temperature measured in this study ranged from 27.5degrees C in April and 28.5degrees C in May while pH ranged between 7.5 and 7.3 in April and May, respectively.