high mortality.

Control of the reproduction cycle was one of the main reasons as it is a requisite for selective breeding programs. Artificial reproduction was not achieved because of the difficulties in hatching or feeding some farmed species such as eel and yellowtail farming.A suspected reason associated with the late realization of success in selective breeding programs in aquaculture was the education of the concerned people - researchers, advisory personnel and fish farmers. The education of fish biologists paid less attention to