Effects of dietary crystalline methionine or oligo‐methionine on growth performance and feed utilization of white shrimp (Litopenaeus vannamei) fed plant protein‐enriched diets. (2nd September 2013)

• Record Type: Journal Article
• Authors: Gu, M.; Zhang, W.B.; Bai, N.; Mai, K.S.; Xu, W.
• Is Part Of: Aquaculture nutrition. Volume 19(2013)Supplement 1
• Page Start: 39
• Page End: 46
• Publication Date: 2013-09-02
• Subjects: feed utilization -- growth -- methionine -- plant protein -- shrimp; Aquaculture -- Periodicals; Aquatic animals -- Feeding and feeds -- Periodicals; Fishes -- Feeding and feeds -- Periodicals; 639.3
• DOI: 10.1111/anu.12089
• Languages: English
• ISSNs: 1353-5773

Abstract

Abstract: An eight‐week feeding experiment was conducted to investigate the effects of dietary crystalline methionine (CMet) or oligo‐methionine (OMet) 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 CMet (SPP30‐CMet) or OMet (SPP30‐OMet) was added in 30% fish meal replacing diets, and 2 g kg −1 CMet (SPP60‐CMet) or OMet (SPP60‐OMet) 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 SPP60‐CMet 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 OMet supplemented treatments ( P > 0.05). Shrimps in SPP30‐OMet treatment showed significantly higher feed efficiency ratio and protein efficiency ratio than those in SPP30‐CMet treatment ( P < 0.05). This study indicated that compared with the CMet, dietary OMet resulted in better growth and feed efficiency of L. vannamei fed with plant protein‐enriched diets.