EFFECTS OF TEMPERATURE ON THE EGG PRODUCTION AND ...

Temperature effects of egg production and growth of Oreochromis niloticus37114000001200000Mean number of egg1000000800000600000400000200000025 26 27 28 29 30 31 32 33Average water temperature (°C)Fig. 1. Mean number of eggs produceed at different temperatures.Mean number of eggs1400000120000010000008000006000004000002000000y = -14325x + 5E+06R² = 0.909***24 26 28 30 32 34Average water temperature (°C)Fig. 2. Relationship between number of eggs and water temperatureEgg production of Nile tilapia in different monthsEggs were collected at different water temperatures from March to Augustand counted the total collected eggs in every month. Water temperature wasmeasured daily and the monthly average water temperature was obtained. Theresult indicated that egg production was highest in March and egg collectionlower in August (Table 3 and Fig 3). There was significant difference amongdifferent months for egg production. The highest number of eggs (2040000 ±10000) was observed in March when average water temperature was 26°C andthe lowest number of eggs (90000 ± 50000) was observed in August whenaverage water temperature was 29°C. The mean number of eggs produced inMarch was significantly (p