RESULTS AND DISCUSSION
Breeding biology
Maturity was observed in 2001 with Fl
generation that is the fish mature at 3 y€ars of its
age and the fenale and male sex-ratio was
0.69:1.0. In 1998, fecundily was obs€rved 5761
eggs of 4200 g female weight and spawning was
found jn Juty to Ausust, 1998. During this perioln generul Notopterus (Pallas) is not highly
fecund species. Ir the pr€sent slxdy the lbcundity
was l.371 lor N. chitala. Hossail]' et al. (1991)
r€poded 3.107/nm body length and 9.226lg body
weight for N. tlotopterus. Low fecundity was found
to be relatcd to the bigger stze of eggs, single
lobed ovary and the presence of nest building
behaviour (Azadi er aa 1995). The lover fecundity
is also related to nest building habit and guarding