Abdul Kader
Universiti Malaysia Terengganu, Malaysia
Title: Growth performance and oxidative stress of Malaysian prawn Macrobrachium rosenbergii by partial replacement of dietary fishmeal with palm kernel meal
Biography
Biography: Abdul Kader
Abstract
Effect of partial replacement of fish meal with palm kernel meal on growth performance and oxidative stress of Malaysian prawn, Macrobrachium rosenbergii was evaluated. A closed aquaculture system with 21fibreglass tanks with the capacity of 150 litre was set up for the experiment. Five test diets were formulated by replacing 0, 10, 20, 30 and 40% fishmeal with palm kernel meal and labelled as PKM0, PKM10, PKM20, PKM30 and PKM40, respectively. Another two diets were prepared by the supplementation of 2% shrimp meal and 2% squid meal in PKM30 and PKM40 diets which designated as PKM30+ and PKM40+, respectively. All the test diets were iso-nitrogenous (30% crude protein), iso-lipidic (12% crude lipid) and iso-energetic (19 KJ/g DM gross energy). Triplicate groups of 30 post-larvae (0.041 ± 0.001 g) were stocked in previously prepared tanks and fed the test diets at the rate of 20 – 30% of their body weight, twice a day for 60 days. The results showed that there was no significant differences (P>0.05) in final weight (g), percent weight gain (%) and specific growth rate (%/ day) of prawn fed PKM0, PKM10, PKM20 and PKM30 diets. However, all these growth parameters were significantly decreased in prawn fed PKM40 diet compared to fishmeal based control diet (PKM0). Supplementation of crude attractants such as shrimp meal and squid meal recovered the depleted growth performances. It was found that the above growth parameters were significantly improved in PKM30+ and PKM40+ diets compared to all other PKM diets. No significant differences were also found between these groups of prawn and the control group. The feed conversion efficiency and protein efficiency ratio also followed the similar trends where PKM40 showed significantly lowest values compared to the control. The feed utilization parameters were significantly improved in PKM30+ and PKM40+ groups. The survival (%) was not significantly affected by any of the dietary treatments. On the other hand, superoxide dismutase activity was similar in all the dietary treatments except in PKM30. It is concluded that 30% fishmeal can be replaced with PKM in the diets of prawn without any detrimental effects on growth performance and feed utilization. Supplementation of small amount of crude attractants such as squid meal, shrimp meal etc could replace 40% or more fishmeal from the diet of Malaysian prawn