期刊
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
卷 36, 期 2, 页码 484-492出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.etap.2013.05.011
关键词
Growth; Condition factor; Hepatopancreas; Procambarus clarkii; Selenium
资金
- State Veterinary Institute, Torino
- University of Perugia
- Fish Breeding Centre of Lake Trasimeno (S. Arcangelo), Province of Perugia, Italy
Effects of selenium diets (Se, 0.3 and 1.2 mg kg(-1)) on juvenile red swamp crayfish Procambarus clarkii were observed for eight weeks. Growth, condition factors and Se levels in exoskeleton and hepatopancreas for both sexes and diets were evaluated at three endpoints. The specific growth rate (SGR) showed a faster, but not statistically significant growth in Se exposed specimens. Se levels were higher in exoskeleton and hepatopancreas of both Se exposed males and females, when compared to controls. The abdomen-total weight relationship (Tw/B) showed no significant differences between Se exposed and control groups. A constant decline of HI values was recorded in both Se exposed sexes and the same trend was observed in control males. Se exposed females evidenced lower HI after 4 and 8 weeks when compared to controls. Therefore, evident reductions of the health indicator values HI suggested that selenium can deplete the hepatopancreas energy reserves, mainly in juvenile male crayfish. (C) 2013 Elsevier B.V. All rights reserved.
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