Effects of Oxidized Fish Oil on Growth Performance, Body Composition and Antioxidant Enzyme Activities of Juvenile Peanut Worm (Sipunculus nudus)

DONG Lanfang; ZHANG Qin; XU Mingzhu; TONG Tong

doi:10.3969/j.issn.1006-267x.2019.09.055

2019 , Vol. 31 >Issue 9: 4396 - 4403

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.09.055

Effects of Oxidized Fish Oil on Growth Performance, Body Composition and Antioxidant Enzyme Activities of Juvenile Peanut Worm (Sipunculus nudus)

DONG Lanfang ,
ZHANG Qin ,
XU Mingzhu ,
TONG Tong

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1. Key Laboratory of Marine Biotechnology of Guangxi, Guangxi Institute of Oceanology, Beihai 536000, China;
2. Guangxi Colleges and Universities Key Laboratory of Utilization of Microbial and Botanical Resources, Guangxi Key Laboratory for Polysaccharide Materials and Modifications, College of Marine and Biotechnology, Guangxi University for Nationalities, Nanning 530006, China

Received date: 2019-03-01

Online published: 2019-09-17

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Abstract

This experiment was conducted to evaluate the effects of oxidized fish oil on growth performance, body composition and antioxidant enzyme activities of juvenile peanut worm (Sipunculus nudus). A total of 5 400 healthy juvenile peanut worm with an initial body weight of (28.86±0.63) mg were randomly divided into 6 groups with 3 replicates of 300 peanut worm. Six experimental diets were prepared using fresh fish oil[peroxide value (POV) was 1.37 meq/kg) and five kinds of oxidized fish oil with different oxidation degrees (POV were 63.62, 151.17, 243.89, 357.79 and 457.82 meq/kg, respectively), which named as OX0 (control), OX1, OX2, OX3, OX4 and OX5, respectively, to fed peanut worm in 6 groups for 8 weeks. The results showed that the oxidized fish oil with different oxidation degrees significantly affected survival ratio (SR), final body weight (FBW), weight gain rate (WGR) and specific growth rate (SGR) (P<0.05), and all of them were decreased at different degrees with the increase of POV of the oxidized fish oil. The SR of OX5 group with was significantly lower than that of control group (P<0.05). The FBW, WGR and SGR of OX4 and OX5 groups were significantly lower than those of control group (P<0.05). The oxidized fish oil with different oxidation degrees significantly affected body protein content (P<0.05). The body protein content in OX1, OX2 and OX3 groups had no significant difference compared with control group (P>0.05), but that in OX4 and OX5 groups was significantly decreased compared with control group (P<0.05). The oxidized fish oil with different oxidation degrees also had significantly effects on superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities of worm (P<0.05). With the increase of POV of the oxidized fish oil, the SOD and GSH-Px activities of worm were decreased gradually, and that in OX5 group was significantly lower than that in control group (P<0.05). In conclusion, oxidized fish oil will result in the retardation of growth, the increase of mortality, the reduction of body nutritional value and the damage of oxidation resistance of juvenile peanut worm, and the exacerbation of them with the oxidation degree of fish oil increasing.

Key words： peanut worm (Sipunculus nudus); oxidized fish oil; growth performance; body composition; antioxidant enzyme

Cite this article

DONG Lanfang , ZHANG Qin , XU Mingzhu , TONG Tong . Effects of Oxidized Fish Oil on Growth Performance, Body Composition and Antioxidant Enzyme Activities of Juvenile Peanut Worm (Sipunculus nudus)[J]. Chinese Journal of Animal Nutrition, 2019 , 31(9) : 4396 -4403 . DOI: 10.3969/j.issn.1006-267x.2019.09.055

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