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Effects of dietary E uropium complex and E uropium(III) on cultured pearl colour in the pearl oyster P inctada martensii
Author(s) -
Ji Lili,
Liu Jianshe,
Song Wendong,
Li Shijie,
Miao Dongliang
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03134.x
Subject(s) - europium , pearl , biology , algae , pearl oyster , botany , chemistry , ion , philosophy , theology , organic chemistry
In the present study, through a transmission experiment, the effects of europium complex and Eu 3+ on the pearl colour in the pearl oyster Pinctada martensii were evaluated. Europium complex and europium salt were respectively enriched by dietary green algae platymonas subcordiformi , and their toxicity to algae were analysed by the 96‐h acute toxic experiment. Then, the green algae enriched europium complex and europium salt were respectively fed pearl oysters for 2 months, and the surface microstructures of cultured pearls were presented with scanning electron microscopy (SEM) and atomic force microscope(AFM). The results show that toxicity of europium complex to algae is much lower than Eu 3+ from lowest no observable effect concentration LNOEC values and 96h‐ EC 50 values and two compounds can modify pearl structure and optimize pearl colour from SEM and AFM images. Taken together, our results, for the first time, show that rare earth complex can improve the pearl quality. This study provides an innovative approach for additional investigation of the influence of rare earth elements on pearls.