Effects of dietary lipids on tissue fatty acids profile,growth and reproductive performance of female rice field eel (<Emphasis Type="Italic">Monopterus albus</Emphasis>) |
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| Authors: | Qiu-Bai Zhou Hua-Dong Wu Chang-Sheng Zhu Xing-Hong Yan |
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| Institution: | (1) Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, College of Aquatic Science and Technology, Shanghai Ocean University, 999 Huchenghuan Road, 201306 Shanghai, People’s Republic of China;(2) College of Animal Science and Technology, Jiangxi Agricultural University, 330045 Nanchang, China;(3) Key Laboratory of Genetic Breeding of Aquatic Animals and Aquaculture Biology of the Ministry of Agriculture, 214081 Wuxi, Jiangsu, China; |
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| Abstract: | The effects of different lipids on tissue fatty acid profile and reproductive performance in female rice field eel were investigated
in this study. Virgin female eels were fed with six diets containing different lipids (diets FO, LO, SO, PO and PL with fish
oil, linseed oil, soybean oil, peanut oil and pork lard, respectively; diet APO with arachidonic acid and peanut oil). The
results showed that there were positive correlations between the contents of 18:2n-6, 18:3n-3, arachidonic acid (ARA), eicosapentaenoic
acid (EPA) and docosahexaenoic acid (DHA) in the tissues of eels and those of the corresponding fatty acids in their diets.
The specific growth rate of eels fed with diet PO was the lowest and significantly lower than that of FO and SO. Gonad of
eels fed with diets PO and PL showed hypogonadism. The long chain polyunsaturated fatty acids (LC-PUFA) can be synthesized
by eels, but the quantity was not enough to meet their reproduction requirement completely. The fatty acid desaturation, rather
than elongation probably was one of the limiting factors. Addition of proper amount of ARA in diet was favorable to the increase
of the hatching rate of fertilized eggs, while EPA and DHA in diet were beneficial to the increase of the survival rate of
larva. Both n-3PUFA and a suitable n-6/n-3PUFA ratio were necessary for growth and reproduction of eels. |
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