Subject: fishery



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FISHERY SS2 WEEK 10 3RD TERM 2019 2020
Biological status:
Growth and maturity of fish slightly depends on biological status. Milt
(sperm) fathering power and egg ripening are important for artificial breeding which is possible only when both male and female fish mature.
IMPORTANCE OF ARTIFICIAL BREEDING
▪ To obtain fish seed.
▪ To obtain large quantity of fish seed.
▪ To obtain high quality hybrid species.
▪ To make fingerling readily available.
▪ To ensure high survival rate of eggs to fingerlings.
▪ To break parasite/disease chain.
▪ To develop strains superior to their ancestors via hybridization.
▪ Prevent extinction.
▪ Sustain fish stock.

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