THE PHYSIOLOGICAL PROFILES
AND GROWTH PERFORMANCE ON
NILE TILAPIA (OREOCHROMIS NILOTICUS) AFTER EXPOSURE TO DIFFERENT LEVELS OF TEMPERATURE
Al-Danasoury, M.A.1; Sharaf, Safaa M.1; El-Dsouky, M.W.2; Shalaby, A.M.2;
Shalaby, A.2 and Abdel- Hamed, Eman A.3
1 Animal Production and Fish Resources Faculty of Agriculture Sues Canal.
2 Fish physiology Department.
3 limnology Department central laboratory for Aquacultural reaserch, abbassa, Abo-Hammed, Sharkia.
|
Received 10 /6 /2021 |
Accepted 8 /7 /2021 |
ABSTRACT
The present study aims to evaluat the possible effect of different levels of temperature in Tilapia Nilotica. Fishes of Nile tilapia were divided into four groups. The1st group (lefet as control group (23 ºC) without adjustment. The 2nd, 3rd, 4th groups exposed to (26, 29 and 32 ºC adjustment by using thermostats in water treatment). High temperature (32ºC) caused reduction significantly (P<0.05) in erythrocyte count (RBCs), haemoglobin content (Hb), haematocrit value (Hct) values when compared to the control groups (2.03 ±0.05 x106, 7.81±0.21g/100ml and 17. 9±0.2%). On the other hand, all another treatments of temperature were non-significant changes in hematological parameter (RBCS, HB and HV).
The total protein (TP) in plasma of fish exposed to two high temperature was decreased significantly as compared to the control group While, the values of glucose, aspartate aminotransferase (AST), alanine aminotransferase (ALT) alkaline phosphatase (ALP) and Uric acid were increased significantly in fish exposed to high doses of temperature.
As well as significant differences in growth parameters during different temperatures between them compared to the control groups, (Final weight (FW), weight gain (WG), Average Daily Gain (ADG) and (SGR). It value of all parameter growth were increased significantly in fish rearing in high level of temperature. (This study showed that the Nile tilapia fish was positively affected by the high temperature.
Key words:
Temperature, Nile tilapia, blood parameters, biochemical analysis and growth performance.
