Growth, precocity, enzyme activity and chemical composition of juvenile Chinese mitten crab,Eriocheir sinensis,fed different dietary protein-to-energy ratio diets
Year: 2011
Type: article
Abstract: A growth experiment was conducted to determine the optimum dietary protein-to-energy (P/E) ratio of juvenile Chinese mitten crab Eriocheir sinensis. Six practical diets were formulated with P/E ratios ranging from 15.94 to 21.25 g protein MJ−1 gross energy (g MJ−1). Results showed that specific growth rates related with molting were significantly affected by dietary P/E ratio (P < 0.05). The specific growth rates both in body weight (SGRw) and carapace width (SGRcw) for the entire experimental period were not significantly affected by dietary P/E ratio (P > 0.05). Molting frequency, survival rate and crab body composition were also significantly affected by dietary P/E ratio (P < 0.05). Rate of precocity displayed negative trends with growth rate, and the trend with SGRcw was significant (P < 0.01). The activities of alkaline phosphatase, trypsinase and steapsin were significantly affected by dietary P/E ratio (P < 0.05). Molting frequency (P < 0.001), SGRw1-2 (P < 0.05) and SGRw0-2 (P < 0.05) were positively and significantly related to alkaline phosphatase activity. We recommend 18.13–19.20 g MJ−1 as the optimum dietary P/E ratio for juvenile E. sinensis, based on growth performance, rate of precocity and digestive enzyme activities.
Source: Aquaculture Research
Authors: Xiaowu Li, Zhongjie Li, Jiashou Liu, Brian R. Murphy
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
Awards: 人工放养鱼、蟹对湖泊生态系统影响, G7188695017
OpenAlex ID: W2062053133