The selenium bioaccumulation of Tenebrio molitor larva
Author of the article:GAO Hong- Li, ZHOU Wen- Zong** , ZHANG Luo, LI Hong-Tao
Author's Workplace： Institute of Geograp hy , Henan Academy of Sciences , Zhengzhou 450052, China
Key Words：Tenebrio molitor larva, bioaccumulation, selenium element, bioaccumulation coefficient
Abstract：After larvae of Tenebrio molitor L. were fed on the diet with selenium compound, their weights, the concentration of selenium in larva and in their faeces were measured, and the special growth rate and the bioaccumulation factor ( BAF) of selenium of the larvae were calculated to analyze the conditions of selenium accumulating effectively in larvae. The results showed that when the selenium concentration in diet was 15~ 20 mgP kg , the concentration of selenium in larvae and the BAF of selenium of larvae were obviously higher than those in the other groups. When the concentration of selenium in diet was higher than this level, the concentration of selenium in larvae decreased, and the normal larval growth was restrained. With the selenium concentration increased in diet, the special growth rate, the food consumption, the faeces amount, and the dry material content of larvae decreased, and the mortality of the larvae, the selenium concentration in faeces increased. . The selenium bioaccumulation in larvae was best when the selenium concentration in diet was 15~ 20 mgPkg.