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THE RELATIONSHIP BETWEEN THE ATTENUATION OF SELENIUM CONTENT AND DIFFERENT SELENIUM COMPOUNDS AFTER SELENIUM IMPROVED BREEDING

Wei Zhou*,Shen Yang, Zufeng Wang
 
College of Fisheries and Life Science
Dalian Ocean University
Dalian, 116023, China
zhouwei@dlou.edu.cn

The experiment is to study the relationship between the attenuation of selenium content in holothurian Apostichopus japonicus and different selenium compounds after selenium improved breeding. Adult holothurian Apostichopus japonicus with initial weight of 54.97±9.49g and juvenile holothurian Apostichopus japonicus with initial weight of 2.28±0.26g as study objects are cultured in seperate tanks and fed on diet containing selenomethionine, sodium selenate or sodium selenite at a rate of 0.3mg/kg for six experimental groups, with the water temperature at 13 ℃, a salinity of 27, and pH 8.1, for sixty days. For each experimental group, two more paralleled sets are being observed as well. Meanwhile, two compared groups, respectively the adult and the juvenile, are set with no addition of selenium. Sixty days later, feed the adult and juvenile sets on diet without addition of selenium, respectively for another sixty days and forty-five days, and test selenium content every six days. The results show that the order of the attenuation of selenium in adult holothurian Apostichopus japonicus from fast to slow are ranged as sodium selenate group > sodium  selenite selenomethionine group; the order of the attenuation of selenium in juvenile holothurian Apostichopus japonicus from fast to slow are ranged as sodium selenite group > sodium selenate group > selenomethionine group.

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