Research Article Open Access

POTENCY OF CRUDE PITUITARY EXTRACT FROM ROUNDUP (GLYPHOSATE)-EXPOSED HOMOPLASTIC DONORS IN INDUCED BREEDING OF CLARIAS GARIEPINUS (BURCH., 1822)

Abstract

The potency of crude pituitary extract from Roundup -exposed homoplastic donors in induced breeding of Clarias gariepinus was studied. Crude pituitary extract from fish exposed to 6mg/L of the toxicant for ten weeks were used to induce oocyte maturation, ovulation and spawning in the female fish. Results showed that there were no significant differences between latency period, fecundity, gonadosomatic index, undeveloped and hatched eggs; normal and deformed fry and percent fry survival of the control and the treatment (P>0.05). However, the values of these parameters were consistently higher in the control than in the treatment. But the percent fertilization and number of fertilised eggs in the treatment were significantly higher than that in the control(P>0.05). Observations from this seem to suggest that although induction of oocyte maturation, ovulation, spawning and survival of fry may not be negatively influenced by the use crude pituitary extract of exposed fish, however, such fry may have poor conversion ratio and hence poor growth performance.

g.n.o eZERI, u.u. gABRIEL and b.t.sORROH