Effects of Temperature on Embryonic Development and Malflormation of Pompano, Trahinotus blochii

Abstract

    The experiment of temperature effect on embryonic development and malformation of pompano (Trachinotus blochii) was carried out at the Northen National Broodstock Center for Marine aquaculture in Cat Ba, Hai Phong, Vietnam. Five temperature levels of 24^oC, 26^oC, 28^oC, 30^oC and 32^oC were studied with 3 replicates each. The results showed that there was significant difference between five treatments in terms of hatching, deformity and survival rate. The result indicated that the significant highest hatching rate was 47.7% at 24^oC. The lowest deformity rate was observed at 24^oC (3.3%) but no significant difference was found between 24^oC, 26^oC and 28^oC. The survival rate was higher at 26^oC (58,6%) and 28^oC (58,2%) after five days of post-hatching than other. Suitable temperatures for pompano incubation ranged from 24^oC to 28^oC. At 26^oC and 28^oC, the lowest deformity rate (3,98 - 4,20%) and the highest survival rate (10.48% and 10.69%) after 40 days of post hatching were recorded. From this study, the temperature range from 26 – 28^oC are recommended for pompano rearing.