Performance of nile tilapia (Oreochromis niloticus) fingerlings II. Influence of different water temperatures

Nile tilapia (Oreochromis niloticus) fingerlings with average weight of 19.0 plus minus 1.0 g were used to study the effect of different temperatures on growth performance, survival rate and some physiological parameters. The fingerlings were stocked in 12 glass aquaria (40x70x60 cm) at 15, 20, 30 a...

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Published inInternational journal of agriculture and biology Vol. 11; no. 3; pp. 301 - 305
Main Authors El-Sherif, M.S. (Suez Canal Univ., Ismailia (Egypt). Animal Production and Fish Resources Dept.), El-Feky, A.M.I. (Suez Canal Univ., Ismailia (Egypt). Animal Production and Fish Resources Dept.)
Format Journal Article
LanguageEnglish
Published 01.05.2009
Subjects
BLOOD COMPOSITION
BODY WEIGHT
FEED CONSUMPTION
FEED CONVERSION EFFICIENCY
FINGERLINGS
GROWTH RATE
OREOCHROMIS NILOTICUS
SURVIVAL
WATER TEMPERATURE
WEIGHT GAIN
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Summary:Nile tilapia (Oreochromis niloticus) fingerlings with average weight of 19.0 plus minus 1.0 g were used to study the effect of different temperatures on growth performance, survival rate and some physiological parameters. The fingerlings were stocked in 12 glass aquaria (40x70x60 cm) at 15, 20, 30 and 25 degree C (as control) for 60 days. Diet of 26.58% protein was offered as feed. Water was changed twice daily with 100% of water size. Growth measurements of tilapia were recorded at 15 days intervals. Blood parameters were recorded at stocking and at the end of the experiment. Results showed that growth performance for tilapia was significantly (P greater than or equal to 0.05) decreased at 15 and 20 degree C. Survival rate was high at temperature 20, 25 and 30 degree C but mortality occurred at 15 degree C. Also, the feed conversion ratio (FCR) for fish increased with increasing temperature, but the difference was not significant (P greater t han or equal to 0.05) between high temperatures (25 & 30 degree C), respectively. Decreasing temperature resulted in decreasing haematocrit and hemoglobin parameters, while differences were not significant (P greater than or equal to 0.05) from control at temperatures 25 and 30 degree C, respectively. The findings revealed that water temperature 25-30 degree C were more suitable for culture of Nile tilapia fingerlings to obtain optimum growth performance and survival rate.
Bibliography:M11
CATPAK-67184
ISSN:1560-8530
1814-9596