Dietary selenium requirement and its toxicity in juvenile abalone Haliotis discus hannai Ino
文献类型: 外文期刊
作者: Wang, Weifang 1 ; Mai, Kangsen 1 ; Zhang, Wenbing 1 ; Xu, Wei 1 ; Ai, Qinghui 1 ; Liufu, Zhiguo 1 ; Li, Huitao 1 ;
作者机构: 1.Ocean Univ China, Key Lab Mariculture, Educ Minist China, Qingdao 266003, Peoples R China
2.Chinese Acad Fishery Sci, Qingdao Key Lab Marine Fish Breeding & Biotechnol, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
3.Shandong Liuhe Grp Co LTD, Qingdao 266061, Peoples R China
关键词: Abalone;Haliotis discus hannai;Selenium;Nutrition;Toxicity
期刊名称:AQUACULTURE ( 影响因子:4.242; 五年影响因子:4.723 )
ISSN:
年卷期:
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收录情况: SCI
摘要: A study was conducted to evaluate the effects of dietary selenium (Se) on survival, growth performances and immune responses of juvenile abalone Haliotis discus hannai. Moreover, the toxicity of high dose of dietary selenium was also analyzed. Six semi-purified diets containing graded levels of sodium selenite (0.15, 0.53, 0.88,1.55, 2.63 and 9.16 mg Se/kg diet) were randomly fed to juvenile abalone (initial weight: 0.68 +/- 0.00 g) in triplicate groups for 24 weeks in a flow-through system. Results showed that the weight gain ratio (WGR, %) of abalone fed 1.55 mg/kg of dietary selenium was significantly (P < 0.05) higher than that with 9.16 mg/kg of dietary selenium. However, there were no significant (P > 0.05) differences when compared to the other treatments. Selenium concentration in the soft body and the activity of glutathione peroxidase in serum were significantly (P < 0.05) increased with dietary selenium. Significant higher activities of phenoloxidase (PO) and lysozyme in serum were observed in the treatment with 0.88 mg Se/kg diet, compared with those in 9.16 mg Se/kg diet However, the protein concentration in serum maintained relatively constant regardless of dietary treatments. The dietary selenium requirement of juvenile abalone was estimated to be 1.408 mg/kg, using second-order polynomial regression analysis. The toxicity of high level of dietary selenium (9.16 mg/kg) to juvenile abalone was characterized by depressed growth performances and decreased activities of PO and lysozyme in serum. (C) 2011 Elsevier B.V. All rights reserved.
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