Effect of dietary copper on the growth performance, non-specific immunity and resistance to Aeromonas hydrophila of juvenile Chinese mitten crab, Eriocheir sinensis.
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| Abstract |
An 8-week feeding trial was conducted to determine the dietary copper (Cu) on growth performance and immune responses of juvenile Chinese mitten crab Eriocheir sinensis. Six semi-purified diets with six copper levels (1.88, 11.85, 20.78, 40.34, 79.56 and 381.2 mg kg(-1) diet) of CuSO4·5H2O were fed to E. sinensis (0.45 ± 0.01 g). Each diet was fed to the crab in five replicates. The crab fed diets with 20.78 and 40.34 mg Cu kg(-1) diet had significantly greater weight gain and hemolymph oxyhemocyanin content than those fed diets with 1.88 and 381.2 mg Cu kg(-1) diet. Survival rates of crab were not significantly different between all treatment groups. The activities of copper-zinc superoxide dismutase (Cu-Zn SOD), phenoloxidase (PO), and total hemocyte count (THC) significantly increased when the supplementation of dietary copper reached 20.78-40.34 mg Cu kg(-1) diets. In the bacteria challenge experiment with Aeromonas hydrophila, survival rates significantly increased and reached a plateau when the dietary copper increased from 1.88 to 40.34 mg kg(-1), whereas significantly decreased when the dietary copper increased from 40.34 to 381.2 mg kg(-1). This study indicates that the level of dietary copper is important in regulating growth and immune response in crab.
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| Authors | Shengming Sun, Jianguang Qin, Na Yu, Xianping Ge, Haibo Jiang, Liqiao Chen |
| Journal | Fish & shellfish immunology (Fish Shellfish Immunol) Vol. 34 Issue 5 Pg. 1195-201 (May 2013) ISSN: 1095-9947 [Electronic] England |
| PMID | 23422815 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
| Copyright | Copyright © 2013 Elsevier Ltd. All rights reserved. |
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