Need for artificial breeding

4.1 Need for Artificial Propagation Some kinds of intervention by man
in the course of natural
propagation of cultivated or
cultivable fishes may help to
achieve a better survival of their
offspring. The techniques of artificial propagation of fish are
manifold, all of which are aimed at
producing plenty of spawn, fry,
and fingerlings for utilization in
culture or for restocking water
bodies or water courses. The demand for quality fish seeds is
particularly great for modern
intensive and super intensive
culture systems. The polyculture
system has further increased the
demand for the seed of fishes of different feeding habits. Artificial propagation, therefore,
involves human intervention in the
process of natural propagation and
has the advantages of
(a) better
rates of fertilization and hatching,

(b) protection against enemies and unfavourable environmental
conditions, and
(c) better
conditions for growth and survival.

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