Intensive nursery production of the Pacific white shrimp Litopenaeus vannamei using two commercial feeds with high and low protein content in a biofloc-dominated system

被引：71

作者：

Correia, Eudes S. ^{[1
]}

Wilkenfeld, Joshua S. ^{[2
]}

Morris, Timothy C. ^{[2
]}

Wei, Liuzhi ^{[3
]}

Prangnell, David I. ^{[2
]}

Samocha, Tzachi M. ^{[2
]}

机构：

[1] Univ Fed Rural Pernambuco, Dept Pesca Aquicultura, BR-52171900 Recife, PE, Brazil

[2] Texas A&M AgriLife Res Mariculture Lab Flour Bluf, Corpus Christi, TX 78418 USA

[3] Ocean Univ China, Key Lab Mariculture, Qingdao 266003, Peoples R China

来源：

AQUACULTURAL ENGINEERING | 2014年 / 59卷

关键词：

Biofloc; Postlanrae; Low/high protein feed; Molasses; Ammonia; LIMITED DISCHARGE; DIETARY-PROTEIN; WATER-QUALITY; EXCHANGE; GROWTH; CARBON; JUVENILES; TOXICITY; NUTRIENT; BOONE;

D O I：

10.1016/j.aquaeng.2014.02.002

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The efficiency of shrimp production in limited exchange systems can be improved by optimizing the protein content of the feed. Therefore, a 62-d nursery study was conducted with 10-day-old Litopenaeus vannamei postlarvae stocked (5000 PL10 m(-3)) in four 40 m(3) raceways to evaluate the effect of high (40%) and low (30%) crude-protein (HP40 and LP30, respectively) diets and molasses supplementation on selected water quality indicators and shrimp performance under limited water exchange. Each raceway was equipped with a real-time dissolved oxygen monitoring system and a foam fractionator to control particulate matter. The level of molasses used in this study was effective in preventing significant ammonia accumulation in the culture medium. However, these supplementation levels were not effective in preventing nitrite accumulation. The HP40 treatment had significantly higher nitrite, nitrate and phosphate concentrations than the LP30 treatment. Shrimp mean final weight (0.94 vs. 1.03 g) and specific growth rate (SGR) (11.03 vs. 11.19% day(-1)) were significantly different between treatments (P<0.05) LP30 and HP40, respectively, while mean survival (similar to 82% vs. 84%) and protein efficiency ratio (PER) (3.89 vs. 3.28) were not (P>0.05). The data suggest that substituting high-protein (40%) with low-protein (30%) feed in the nursery phase in a biofloc dominated system operated with minimal discharge may provide an alternative to improve shrimp biofloc technology, through improved water quality, cheaper (lower protein) feed and reduced environmental impact. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：48 / 54

页数：7

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