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| Changes in Fatty Acid Composition During Early Embryonic Development of Yellow Catfish Pelteobagrus fiulvidraco |
| YAO Jun-jie,ZHAO Yun-long,LI Chuan,HE Deng-ju,HU Cong-yun |
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Abstract The composition of fatty acids in mature eggs and embryos during early development of yellow catfish Pelteobagrus fiulvidraco were determined by biochemical methods. The results showed that the predominant fatty acids, in terms of relative proportion, were C_(16:0), C_(18:0), C_(16:1n-7), C_(18:1n-9),and C_(18:2n-6) both in matureeggs and embryo during early development stage. Besides, large proportion of C_(18:3n-3) was observecl in the. The fatty acid was utilized by various patterns during various embryonic stages. The proportion of the poly-unsaturated fatty acids (HUFA) was high during blastula, gastrula and organogenesis. The monounsaturated fatty acids(MUFA) increased during cleavage and blastula. The saturates fatty acids(SFA) acted as the main energy source during early embryonic development. SFA supplied main energy for metabolism during gastrula, nerve embryo and organogenesis. There were higher proportion of HUFA in fertilized eggs than that in the mature eggs.However, the proportion of SFA increased,indicating that the embryos started the active metabolism after fertilization.
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Received: 25 November 2009
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