Effects of Dietary Selenium Content on Growth, Body Composition, Tissue Selenium Content and Related Enzyme Activities of Juvenile Peanut Worm, Sipunculus nudus Linnaeus

XU Mingzhu, ZHANG Qin, TONG Tong, DONG Lanfang, YANG Jialin, JIANG Yan, HUANG Guoqiang

doi:10.3969/j.issn.1006-267x.2015.06.009

2015 , Vol. 27 >Issue 6: 1733 - 1739

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.06.009

Aquaculture Nutrition

Effects of Dietary Selenium Content on Growth, Body Composition, Tissue Selenium Content and Related Enzyme Activities of Juvenile Peanut Worm, Sipunculus nudus Linnaeus

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Guangxi Institute of Oceanology, Key Laboratory of Marine Biotechnology of Guangxi, Beihai 536000, China

Received date: 2014-12-23

Online published: 2015-06-17

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Abstract

This trial was conducted to investigate the effects of dietary selenium content on growth, body composition, tissue selenium content and related enzyme activities of juvenile peanut worm, Sipunculus nudus Linnaeus. A total of 7 200 juvenile peanut worm with the average body weight of (16.12±0.26) mg were randomly divided into 6 groups with 3 replicates per group and 400 juveniles per replicate. The juveniles in those 6 groups were fed diets with six selenium contents (0.19, 0.37, 0.63, 0.82, 1.06 and 1.29 mg/kg, respectively) for 8 weeks. The results showed that the dietary selenium content had significant effects on weight gain rate (WGR), specific growth rate (SGR) and survival ratio (SR) of juvenile peanut worm (P<0.05). With the increase of dietary selenium content, the WGR and SGR were increased, and the highest values were observed in 1.29 mg/kg group, but the lowest value of SR was also found in this group. The dietary selenium content had a significant effect on body lipid content (P<0.05), the body lipid content showed an increasing trend as the dietary selenium content increasing. No significant differences were observed in body moisture, crude protein and ash contents among all groups (P>0.05). And dietary selenium content could significantly affected the contents of selenium in body wall and body (P<0.05), and those were increased with the dietary selenium content increasing. Moreover, dietary selenium content could significantly affected body glutathione peroxidas (GSH-Px) and glutathione reductase (GR) activities of juvenile peanut worm (P<0.05). With the of dietary selenium content increasing, the GSH-Px activity was increased and GR activity was declined. In conclusion, the suitable dietary selenium content can improve the growth of juvenile peanut worm, thus increase the cultured production of peanut worm.

Key words： juvenile peanut worm; selenium; growth; body composition; GSH-Px; GR; tissue selenium content

Cite this article

XU Mingzhu, ZHANG Qin, TONG Tong, DONG Lanfang, YANG Jialin, JIANG Yan, HUANG Guoqiang . Effects of Dietary Selenium Content on Growth, Body Composition, Tissue Selenium Content and Related Enzyme Activities of Juvenile Peanut Worm, Sipunculus nudus Linnaeus[J]. Chinese Journal of Animal Nutrition, 2015 , 27(6) : 1733 -1739 . DOI: 10.3969/j.issn.1006-267x.2015.06.009

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