This trial was conducted to investigate the effects of dietary manganese content on growth performance, body composition, coelomic fluid manganese-superoxide dismutase (Mn-SOD) activity and tissue manganese content of juvenile peanut worm, Sipunculus nudus Linnaeus.Juvenile peanut worm with the average body weight of (17.11±0.12) mg were fed six isonitrogenous and isoenergetic microparticle diets with manganese level of 3.45, 8.26, 15.98, 23.16, 28.67, 33.83 mg/kg for 8 weeks, respectively.Each diet had three replicates and each replicate had 400 juvenile peanut worm.The results showed that dietary manganese content had significant effects on weight gain rate (WGR), specific growth rate (SGR), survival ratio (SR), body ether extract and manganese contents, and coelomic fluid Mn-SOD activity (P<0.05), but had no significant effects on body moisture, crude protein and ash, and body wall manganese contents (P>0.05).With the dietary manganese content increasing, the WGR, SGR, SR, body ether extract content and coelomic fluid Mn-SOD activity were firstly increased and then decreased.When the dietary manganese content was 23.16 mg/kg, WGR and SGR produced the maximum values, while SR, body ether extract content and coelomic fluid Mn-SOD activity had the maximum values when the dietary manganese content was 28.67 mg/kg.With WGR as the evaluating index, the suitable dietary manganese requirement of juvenile peanut worm is 22.58 mg/kg diet by regression equation.
XU Mingzhu, ZHANG Qin, TONG Tong, DONG Lanfang, YANG Jialin, JIANG Yan, HUANG Guoqiang
. Effects of Dietary Manganese Content on Growth Performance, Body Composition, Coelomic Fluid Manganese-Superoxide Dismutase Activity and Tissue Manganese Content of Juvenile Peanut Worm, Sipunculus nudus Linnaeus[J]. Chinese Journal of Animal Nutrition, 2015
, 27(10)
: 3077
-3083
.
DOI: 10.3969/j.issn.1006-267x.2015.10.012
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