Studies on the induced spawning and larval rearing of a freshwater catfish,Mystus punctatus (Jerdon)
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The freshwater catfishMystus punctatus was successfully bred in the laboratory by injecting the pituitary extract of the marine catfishTachysurus macuiatus. The number of eggs released by a single female fish was 9050 ± 700, the relative fecundity was 43·1 and the fertilization success was 85 ± 2·8 per cent. The average diameter of the unfertilized eggs ranged from 1·27 to 1·35 mm and the fertilized eggs ranged from 1·45 to 1·50 mm. The eggs hatched within 18 to 24 hr at a water temperature of 28·5 ± 1·8°C, and the percentage of hatching was 78%. The larvae metamorphosed into juveniles within fifteen days of their hatching. A description of the egg and larval development to metamorphosis is given.
KeywordsMystus punctatus induced breeding pituitary extract hatching metamorphosis larval development
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- Alikunhi K H, Vijayalakshmanan M A and Ibrahim K H 1960 Preliminary observations on the spawning of Indian major carps, induced by injection of pituitary harmones;Indian J. Fish 7 1–19Google Scholar
- Chaudhuri H 1960 Experiments on induced spawning of Indian major carps with pituitary injections;Indian J. Fish 7 20–48Google Scholar
- Devaraj K V, Varghese T J and Sathyanarayana Rao G P 1972 Induced breeding of the freshwater cat fishClarias batrachus (Linn.) by using pituitary glands from marine cat fish;Curr. Sci. 41 468–870Google Scholar
- Jhingran V G 1975Fish and fisheries of India (New Delhi: Hindustan Publishing Corporation) 508–510Google Scholar
- Mansueti A J and Hardy J D Jr 1967Development of fishes of the Chesapeake Bay region—An Atlas of Egg. Larval and Juvenile Stages, Part I. (ed.) E E Daubler Jr Natural Resources Institute, (Baltimore: University of Maryland Press) 202 pp.Google Scholar