Transportation of striped catfish (Pangasianodon hypophthalmus) fingerling in low temperature condition

Abstract

This study was conducted to evaluate the effects of the low temperature and transportation time on survival and physiological parameters of striped catfish (Pangasianodon hypophthalmus). The experiment was designed as 9 treatments and triplicates for each treatment. The treatments were consisted of three temperatures (15, 18, 210C) in combination with three transportation times (2, 4 and 6 hrs.). After transportation period, fish were stocked in 500-L tanks with normal temperature for 72 hrs to monitor the recovery (mainly, survival rate). The blood sample of 5 randomly selected fish were collected for aematological parameter analysis just before transfered to normal temperature and after 72 hrs. The results showed that the highest of erythrocytes was found in the treatment 180C-4 hrs. (2.91±0.4x106 cell/mm3), 150C-6 hrs. (2.9±0.39x106cell/mm3), and the lowest was in the 180C-2 hrs. (2.06±0.28x106cell/ mm3), significantly different if compared to other treatments (p<0,05). Haemoglobine levels in treatments of 6 hrs. was significantly higher than of the treatments of 2 hrs. and 4 hrs. (p<0,05). Haematocrit in the treatments of 150C was higher if compared to the 180C and 210C treatments (p<0,05). The plasma glucose level increased in the treatment of 150C (75.84±9.99 mg/100mL), was significantly different in comparison with the 180C treatment (59.8±9.66 mg/100 mL) and 210C treatment (66.45±10.43 mg/100 mL) (p<0,05). The survival rates of fish at 72 hrs. stocked in normal condition were significantly different among treatments (p<0,05). The survival rate in 210C treatment was highest.