author(s)
Ruby P, Ahilan B, Felix S and Samuel Mosses TLS

abstract
An experiment was conducted to compare the seed production of pearlspot (Etroplus suratensis) under different photoperiod combinations. Photoperiod combinations of 1000 lux/ 6 hours, 1000 lux/ 8 hours, 1000 lux/ 10 hours and control on seed production of Pearl Spot (Etroplus suratensis) were tried. Each combination represented treatment and was duplicated 300 litre FRP tank system. Temperature was maintained at 26.7 ºC ±1.0 ºC. Fishes with mean body length and weight of 16.7 cm and 119.44 g respectively, were stocked at a rate of 4 fishes / tank (2 pair).The experiment was conducted for a period of 90 days. One way ANOVA of the data clearly affirmed that significant differences (p<0.05) was observed among the 6L:18D treatment which produced significantly greater (p<0.05) number of a seeds in single spawning (1453 Nos) than the treatment with longer photoperiods and control.