| 【Objective】The study was conducted to explore the optimal protein level in the feed for Exopalaemon carinicauda cultured in ponds.【Method】The experiment was carried out in 12 cement ponds（length×width×depth = 14 m × 12 m × 1.2 m）, and 1 kg of the parents of E. carinicauda with similar specifications（average: 2.5 g/tail） were placed in each pond with a size of 400 tails（half male and half female）. Every 3 cement ponds were set as a treatment, and then were fed with different feed containing 30%, 34%, 38% and 42% of protein （marked as Group 1#-4#, respectively）. The breeding cycle was 4 months, and the body weight, hepatopancreas index（HSI）, fillet yield, physiological and
biochemical indexes of E. carinicauda of each feed group were measured.【Results】（1）There was no significant difference in body weight, HSI and fillet yield of E. carinicauda among the four feed groups. The body weight and HSI of Group 2# were slightly higher than those of the other groups.（2）The activities of glutamic-oxalacetic transaminase（GOT）and superoxide dismutase（SOD）in the hepatopancreas of each feed group were significantly different. Among them, Group 3# had the lowest GOT level and Group 2# had the highest SOD level.（3）The protein level in the feed had a significant effect on the ash content in the hepatopancreas, and the ash content of Group 3# was significantly higher than that of Group 1# and Group 2#. （4）The feed protein level had a significant effect on the crude fat content and ash content in the muscle. With the increase of the protein level in the feed, the crude fat content in the muscle showed a significant downward trend, while there was a significant increase
in the ash content in the muscle of Group 1#-3#, among which the crude fat content of Group 1# and the ash content of Group 3# were the highest.【Conclusion】Under the pond culture conditions, the optimal dietary protein level for E. carinicauda was about 34%. |
