الفهرس 
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Abstract
Due to the increase of world population, there is wide need to increase
protein production in the world. Aquaculture and mariculture possess the
greatest potential for production of animal proteins.
Aquaculture and fishery-stocking programs are increasing the
importance of the world economy owing to the increasing use and
consumption of fish products. The successful production of faster growing,
feed-efficient strains of fish and resistance to diseases have a major impact as
an important source of protein.
Many investigators have taken up the challenge to alter the genetic
make up of fish to improve their characters. It has become possible in the last
few years to introduce new genes into the germ line of fish. This offers
opportunities to increase the genetic improvement of economic livestock of
fish. Another opportunity with transgenic animals (animal with introduction
of genes) is to develop stocks with novel attributes, products or traits (Lathe et
al., 1987) which represent qualitative and quantitative changes.