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Alleviation effect of dietary cerium and its complex with chitosan oligosaccharide on cadmium accumulation in juvenile turbot, Scophthalmus maximus L., under cadmium stress
Author(s) -
Cui LiQing,
Xu Wei,
Wang DongFeng,
Zuo Rantao,
Mai KangSen,
Ai QingHui
Publication year - 2016
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12690
Subject(s) - turbot , scophthalmus , biology , zoology , cadmium , feed conversion ratio , food science , chemistry , fish <actinopterygii> , endocrinology , body weight , fishery , organic chemistry
An 8 weeks feeding trial was conducted to investigate the effect of dietary cerium (Ce) and its complex with chitosan oligosaccharide ( COS ‐Ce) on growth performance and cadmium (Cd) accumulation of turbot, Scophthalmus maximus L. under Cd stress. The basal diet (Diet 0) was formulated without Cd and cerium as the control. Seven other experimental diets (Diets 1–7) were formulated with supplementation of 50 mg Cd 2+ /kg feed, 50 mg Cd 2+ /kg and 50 mg Ce 3+ /kg feed, 50 mg Cd 2+ /kg and 100 mg Ce 3+ /kg feed, 50 mg Cd 2+ /kg and 200 mg Ce 3+ /kg feed, 50 mg Cd 2+ /kg and 50 mg COS ‐Ce/kg feed, 50 mg Cd 2+ /kg and 100 mg COS ‐Ce/kg feed, and 50 mg Cd 2+ /kg +200 mg COS ‐Ce/kg feed. Results of the present study showed that, compared with the control group, the condition factor in fish fed the diet with 50 mg Cd 2+ /kg feed (Diet 1) was significantly lower, whereas the Cd concentration in liver and kidney of fish fed the diet with 50 mg/kg Cd 2+ (Diet 1) was significantly higher ( P < 0.05). The high Cd accumulation of fish fed diets with sole 50 mg/kg Cd (Diet 1) could be significantly decreased by 51.72% after supplementation of 200 mg COS ‐Ce/kg in the diet (Diet 7). These results suggested that elevated COS ‐Ce could effectively protect against dietary Cd accumulation in turbot.