EFFECTS OF PHYTASE AND NON2STARCH POLYSACCHARI DE ENZYM ESUPPLEM ENTATI ON IN D IETS ON GROW TH AND D IGESTIVE ENZYM E ACTIVITY FOR JAPANESE SEABASS, LATEOLABRAX JAPON ICUS C.

A feeding experiment was conducted to investigate the effects of dietary exogenous enzymes (Phytase, non-starch polysaccharide enzymes: WX and VP) on growth, body composition and digestive enzymes activitives of Japanese seabass, Lateolabrax japonicus C1 (initialweight (61-6 ± 0110) g) 1 A basal dietwas used as the control (Diet1), which contained 3611% fish meal and 1810% compound protein source (soybean meal: meat and bone meal: peanut meal: rape-seed meal=4: 3: 2: 1, and crystalline lysine, methionine and isoleucinewere supplemented to simulate the essential amino acid profile of fish meal) 1 Two other dietswere supplemented with-00mg phytase and the combination of 800mgWX and 400 mgVP per kilogram diet, respectively1 Each dietwas fed to triplicate groups of fish in seawater floating cages (115m &#-15; 115m &#-15;-10m), and each cage was stocked with 60 fish1 Fish were fed twice daily (06: 00 and 18: 00) to apparent satia-tion for 8 weeks1 The water temperature fluctuated from-715℃ to-915℃, the salinity from-5‰ to-8‰ and dissolved oxygen content was above 7mg/L during the experimental period1 Results showed that exogenous enzymes supplementa-tion did not significantly influence the survival of Japanese seabass (9-%-95%), but significantly improved the growth (weight gain (WG) increasing from 85913% to 9471-% and 9051-%, specific growth rate (SGR) from 410 to 41-and 411%/d) (p p p p <0101), but no significant differences in lipase and amylase were observed.