Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (15): 144-149.doi: 10.11924/j.issn.1000-6850.casb2021-0142

Special Issue: 生物技术 水产渔业 畜牧兽医

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Soft Pellet Feed Preparation and Application for Mud Crab (Scylla Paramamosain)

LIN Guowen()   

  1. Mindong Fishery Research Institute of Fujian Province, Ningde, Fujian 352100
  • Received:2021-02-08 Revised:2021-09-14 Online:2022-05-25 Published:2022-06-07

Abstract:

The study was carried out to screen favorable soft pellet feeds for mud crab (Scylla paramamosain) factory farming. Mud crabs with average body weight of (261.44-24.62)g were raised in plastic box (360 mm×260 mm×270 mm) and fed by fresh Sinonovacula constricta (control group) and soft pellet feeds (test group) composed of 70% frozen Decapterus maruadsi meat, 15% eel meal, 3% calcium phosphate, 2% agar and 10% fish oil. The growth rate, survival rate and nutritional composition of mud crabs were analyzed over 45 days of feeding. The results showed that the survival rate in soft pellet feed group was 90.48%, which was higher than that of control group (71.43%), but the difference was not significant (P>0.05). The growth rate and specific growth rate in the test group were 34.62±17.93 and 0.64±0.29 respectively, which were dramatically higher than those of control group (P<0.05), which were 14.38±9.51 and 0.29±0.19 respectively. The contents of essential amino acids and delicious amino acids of mud crabs in the test group (muscle: 2.9% and 3.96%; gonad: 2.39% and 2.63%) were higher than those in the control group (muscle: 2.53% and 3.27%; gonad: 1.80% and 2.14%); and the contents of monounsaturated fatty acids and unsaturated fatty acids (muscle: 18.5% and 36.7%; gonad: 20.5% and 23.9%) were also higher than those in control group (muscle: 15.4% and 18.9%; gonad: 17.7% and 18%). Therefore, the soft pellet feeds can effectively replace fresh shellfish for the factory farming of mud crabs.

Key words: soft pellet feed, Scylla paramamosain, growth rate, amino acid, fatty acid

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