EFFECT OF INCREASING DHA CONTENT IN NEW WEANING DIETS FOR LONGFIN YELLOWTAIL (SERIOLA RIVOLIANA)

摘要

With the common name of longfin yellowtail, Seriola rivoliana (Valenciennes and Cuvier, 1833) is one of the species proposed for the diversification in marine aquaculture, mostly due to the fast growth rate, high flesh quality, and worldwide distribution (Roo et al., 2012). This species belongs to the family of Caran-gidae, shared with the widely known species like greater amberjack S. dumerilii (Risso, 1810), Japanese amberjack S. quinqueradiata (Temminck and Schlegel, 1845), yellowtail amberjack S.lalandi, (Valenciennes, 1833), and longfin yellowtail S. rivoliana (Valenciennes, 1833). In general, polyunsaturated fatty acids (PUFAs) play an important role in larval nutrition and rearing success. Moreover, several studies have shown that DHA has agreater potential as an essential fatty acid for marine fish larvae than EPA (Watanabe et al., 1989; Watanabe, 1993), since its requirement more limiting for growth and survival than those for other n-3 HUFA (Izquierdo, 1996).