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Effects of dietary arginine on survival,growth,nonspecific immune responses and disease resistance in juvenile darkbarbel catfish(Pelteobagrus vachelli)

Effects of dietary arginine on survival,growth,nonspecific i...

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The 14th International Symposium on Fish Nutrition & Feeding

作者： Fuxian Feng~1,Hongming Ma~(1*),Kangsen Mai~1,Qinghui Ai~1,Wenbing Zhang~1,Yi Hu~2, Qingfei Li~1,Yun Huang~2 1 The key laboratory of Mariculture(Ministry Education of China),Ocean University of China,5 Yushan Road,Qingdao,Shandong 266003,P.R.China 2 College of Animal Science And Technology,Hunan Agriculture University,Changsha,Hunan 410128, P.R.China

A 10-week feeding trial was conducted to estimate dietary arginine(Arg) requirement of juvenile darkbarbel catfish and its effects on nonspecific immune responses and disease resistance when challenged with Aeromonas *** diet were formulated with grade levels of Arg (1.24,1.48,1.72,1.96,2.2 and 2.44%of the dry diet) with 42%crude protein and 10%crude lipid. Each diet was fed to triplicate groups of darkbarbel catfish(initial body weight of 1.02±0.01 g ) to apparent satiation for 10 weeks and each group was stocked with 50 *** the feeding trial, growth,biochemical and nonspecific immune parameters were *** survival, weight gain(WG) and specific growth ratio(SGR)were significantly affected by dietary arginine concentrations(Pdietary groups(Prequirement of juvenile darkbarbel catfish on brokenline analyse of SGR were 2.10%of *** respiratory burst activity and phagocytosis percentage(PP) of head kidney leukocytes increased significantly with the increase of dietary *** lysozyme activity was significantly (P0.05). From the present experiment,it may be concluded that the Arg requirement of juvenile darkbarbel catfish based on SGR is 2.10%Arg of dry diet and Arg supplementation may have benefits on enhancing immune responses.

关键词： Darkbarbel catfish Arginine dietary requirement Nonspecific immune response

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