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Biochemical comparison between eggs from female C hinese sturgeon ( A cipenser sinensis G ray, 1835) reconditioned in freshwater and eggs from wild females: evaluation of female reconditioning as a conservation culture technique
Author(s) -
Li W.,
wei Q.W.,
Shen L.
Publication year - 2014
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.12547
Subject(s) - biology , sturgeon , human fertilization , zoology , freshwater fish , fishery , fish <actinopterygii> , anatomy
Summary Chinese sturgeon ( A cipenser sinensis G ray, 1835) eggs from wild females (‘wild eggs’) and eggs from females reconditioned in freshwater (‘freshwater eggs’) were compared for biochemical factors related to their good chemical and physical condition and successful fertilization. Dry weights did not differ between the two groups of eggs. Wild eggs had a significantly higher protein content but lower lipid content than freshwater eggs. There were multiple and significant differences in the fatty acids between eggs from the two groups, but there was no difference for vitellin (Vn). The levels of phosphorus (P), magnesium (Mg), vitamin A ( VA ) and vitamin E ( VE ) in wild eggs were significantly higher than in freshwater eggs, but calcium (Ca) and zinc (Zn) levels did not differ between the two groups. These results can be used to discriminate wild eggs and reconditioned eggs. Also suggested is to decrease lipids and increase protein levels in freshwater eggs for better egg quality. Mg, P, VA and VE should also be given as sturgeon food supplements.