Small-scale commercial production of tilapia fry and fingerlings in concrete raceways

This paper discusses the investment prospects in Tilapia fry and fingerling production in raceways created from the concrete drainage channel of a reservoir or pond of an existing fish farm in Nigeria. With an initial capital of 1,300 and an annual operating cost of 310 spent on procurement of fish feed and brood stock for a 10 m super(2) raceway per se, a net profit of 4,100 and 5,090 would be realized from Sarotherodon galilaeus in the first year and subsequent years of production respectively, assuming that the fingerling production rate has been maintained through the production period. It is concluded that the application of this approach of optimizing the use of available resources in the fish farm for the productive breeding of Tilapia fry and fingerlings will apart from alleviating the problem of scarcity of stocking materials in the country, increase the profit margin accruing to the fish farmer

Development of a sampling expert system:"FISHMAP"

This research program consisted of three major component areas: (I) development of experimental design, (II) calibration of the trawl design, and (III) development of the foundation for stock assessment analysis. The products which have I. EXPERIMENTAL DESIGN resulted from - the program are indicated below: The study was successful in identifying spatial and temporal distribution characteristics of the several key species, and the relationships between given species catches and environmental and physical factors which are thought to influence species abundance by areas within the mainstem of the Chesapeake Bay and tributaries