EFFECTS OF TEMPERATURE ON THE EGG PRODUCTION AND ...

Faruk et.al.for each treatment. Feeding rate was 15g, 25g and 35g in 1 st , 2 nd and 3 rd weekrespectively. Feeding intensity was 5 times daily.Table 1. Experimental layout of hormone treated Nile tilapia fry rearing in nurseryhapasData analysisTreatmentsDuration (date)T1 26.02.11-18.03.11T2 14.03.11-02.04.11T3 10.04.11-30.04.11T4 23.04.11-13.05.11T5 12.05.11-01.06.11T6 29.05.11-18.06.11T7 07.06.11-27.06.11T8 12.07.11-01.08.11T9 04.08.11-24.08.11T10 10.09.11-30.09.11The data obtained for the egg production and growth of hormone treatedtilapia fry were statistically analyzed to see whether the influence of differenttemperatures were significant or not. One way analysis of variance (ANOVA) wasdone with the help of SPSS (Statistical Package for the Social Science).ResultsEgg production of Nile tilapia at different water temperaturesThe effect of temperature on egg production of Nile tilapia wasdetermined through the collection of eggs from mouth of female tilapia andcounting them. Egg production was found higher at lower temperature andgradually decreased with the increase of temperature (Table 2 and Fig 1). Therewas significant difference among different water temperatures for eggproduction. The highest mean number of eggs (1220000 ± 30000) wise observed at25°C and the lowest number (50000 ± 1000) was found at 33°C. The mean numberof eggs at 25°C was significantly (p