Open AccessEffects of dietary crystalline methionine or oligo‐methionine on growth performance and feed utilization of white shrimp ( Litopenaeus vannamei ) fed plant protein‐enriched diets
Author(s) -
Gu M.,
Zhang W.B.,
Bai N.,
Mai K.S.,
Xu W.
Publication year - 2013
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12089
Subject(s) - litopenaeus , methionine , shrimp , feed conversion ratio , biology , fish meal , meal , weight gain , food science , protein efficiency ratio , zoology , plant protein , body weight , biochemistry , fish <actinopterygii> , amino acid , fishery , endocrinology
An eight‐week feeding experiment was conducted to investigate the effects of dietary crystalline methionine ( CM et) or oligo‐methionine ( OM et) on growth performance and feed utilization of white shrimp, Litopenaeus vannamei . A practical diet was used as control diet. The other four diets replacing 30% and 60% fish meal by plant meal were formulated. To balance the methionine content, 1 g kg −1 CM et ( SPP 30‐ CM et) or OM et ( SPP 30‐ OM et) was added in 30% fish meal replacing diets, and 2 g kg −1 CM et ( SPP 60‐ CM et) or OM et ( SPP 60‐ OM et) was added in 60% fish meal replacing diets. Results showed that methionine source significantly affected growth, body compositions and hepatosomatic indices ( HSI ) of white shrimp ( P < 0.05). Shrimps in SPP 60‐ CM et treatment showed significantly lower weight gain, body crude protein content and higher HSI than those in the control ( P < 0.05). However, no significant difference in these indices was observed between the control and OM et supplemented treatments ( P > 0.05). Shrimps in SPP 30‐ OM et treatment showed significantly higher feed efficiency ratio and protein efficiency ratio than those in SPP 30‐ CM et treatment ( P < 0.05). This study indicated that compared with the CM et, dietary OM et resulted in better growth and feed efficiency of L. vannamei fed with plant protein‐enriched diets.