Comparative study on the effects of L-methionine or 2-hydroxy-4-(methylthio) butanoic acid as dietary methionine source on growth performance and anti-oxidative responses of turbot (Psetta maxima)

Safety level evaluation of dietary 2-hydroxy-4-(methylthio) butanoic acid (HMTBa) for turbot Scophthalmus maximus based on growth performances, anti-oxidative responses, and liver and intestine conditions

“…The basal diet (H-0, Table 1), containing 48% crude protein, 12% crude lipid, 0.59% methionine and 0.41% cysteine, was similar with that of our previous studies (Hou et al, 2012;Ma et al, 2013). The crystalline L-amino acid premix was supplemented to diet according to the whole-body amino acid pattern of turbot except for methionine and cystine (Table 2) (Kaushik, 1998).…”

“…Our previous study on turbot (Scophthalmus maximus L.), which is a highly valued marine flatfish in China since the 1990s, also found that turbot could use HMTBa as effectively as or better than crystal methionine to achieve a higher maximum specific growth rate (Hou et al, 2012;Ma et al, 2013). On the basis of SGR, the dietary total methionine requirements based on L-Methionine and HMTBa for juvenile turbot were 1.58% and 1.56% respectively, and the optimum addition levels of L-Methionine and HMTBa are 0.99% and 0.97%, separately, with 0.59% methionine in the basis diet (Ma et al, 2013).…”

“…In the fish feed containing high level of plant protein feedstuffs, methionine is the first limiting essential amino acid, and its deficiency in fish diets decreased fish growth performance and ultimately limited the use of plant ingredients in fish feed (Gatlin and Harrell, 1997;Ma et al, 2013;Mai et al, 2006). Studies indicated that sufficient addition of commercial crystal methionine or methionine analogue in fish feed containing high level plant feedstuffs could increase fish growth performance and feed utilization (Li et al, 2009;Ma et al, 2013;Mai et al, 2006;Mukhopadhyay and Ray, 2001;Opstvedt et al, 2003;Takagi et al, 2001).…”

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“…It is farmed on the Atlantic coast of Europe as well as on the Pacific coast of Asia including China, Korea and Japan (Ma et al, 2013). In the North Sea, turbot (Scophthalmus maximus) represent highly valuable species in commercial fisheries (Kerby et al, 2013).…”

Metionina+cistina digestível para juvenis de tambaqui

“…Também exerce funções no sistema imune (Elmada et al, 2016) e na atividade antioxidante (MA et al, 2013). Estudos vêm demonstrando que a suplementação de metionina+cistina pode melhorar o desempenho, a conversão alimentar e a taxa de eficiência proteica dos peixes (Mai et al, 2006;Bomfim et al, 2008).…”