IMTA with Gracilaria vermiculophylla: Productivity and nutrient removal performance of the seaweed in a land-based pilot scale system
IMTA with Gracilaria vermiculophylla: Productivity and nutrient removal performance of the seaweed in a land-based pilot scale system
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DOI：
10.1016/j.aquaculture.2010.12.036
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发表时间：
2011-02-25
期刊：
影响因子：
4.5
通讯作者：
Sousa-Pinto, Isabel
中科院分区：
文献类型：
--
作者：
Abreu, Maria H.;Pereira, Rui;Sousa-Pinto, Isabel
利用生态工程工具发展更可持续的水产养殖是至关重要的。在这方面，正在设计以海藻为基础的综合多营养水产养殖（IMTA）系统，以减轻几种形式的饲养水产养殖造成的环境问题。一些大型藻类物种，即一些来自江蓠属的藻类，已被证明是有效的生物过滤器。葡萄牙（北纬40度38分，西经8度43分）的Ria de Aveiro泻湖中生长着vermiculophylla。它一直是一种未开发的琼脂生产资源。在一个比目鱼和大比目鱼陆基水产养殖设施安装了一个1200升的海藻养殖系统，以评估该物种作为IMTA系统生物过滤器组成部分的潜力。采用全年全因子试验，研究了放养密度(3、5和7 kg m（-2) (fw)）、水分交换速率（100和200 L h(-1)）和季节对毛条相对生长率（RGR）、生产力和养分去除的影响。蛭叶菌能保持较好的综合性能；然而，结果表明，为了获得成功的生产力，栽培条件需要全年适应。总体而言，生物量产量和养分去除量与栽培密度呈负相关。在播种3 kg fw m（-2）的池中，产虫量为0.7 +/- 0.05 kg dw m（-2）月（-1）；该生物量每月（-1）去除221 +/- 12.82 g m（-2）碳和40.54 +/- 2.02 g m（-2）氮（+/- 0.03%）。温度和光照是影响海藻生长和去除营养物性能的主要环境因子。经过适当的升级，这一试点综合管理技术系统已准备好在水产养殖作业中实施。事实证明，vermiculophylla是陆基IMTA系统的有效组成部分，对养鱼场具有环境和潜在的经济效益。(C) 2011 Elsevier B.V.版权所有
The use of ecological engineering tools for the development of a more sustainable aquaculture is crucial. In this context, seaweed based Integrated Multi-Trophic Aquaculture (IMTA) systems are being designed to mitigate the environmental problems caused by several forms of fed aquaculture. Several macroalgal species, namely some from the genus Gracilaria, have been shown to be efficient biofilters,. Gracilaria vermiculophylla thrives in Ria de Aveiro lagoon, Portugal (40 degrees 38N, 8 degrees 43W). It has been an unexploited resource for the production of agar. A seaweed cultivation system with 1200 L tanks was installed at a sole and turbot land-based aquaculture facility to evaluate the potential of this species as the biofilter component of an IMTA system. A year round, full factorial experiment was done, testing for the influence of stocking density (3, 5 and 7 kg m(-2) (fw)), water exchange rate (100 and 200 L h(-1)) and time of the year on G. vermiculophylla's relative growth rates (RGR), productivity and nutrient removal. G. vermiculophylla was able to maintain a good overall performance; however, results indicate that the culture conditions require adaptations throughout the year in order to attain successful productivities. In general, biomass production and nutrient removal were negatively related to the cultivation densities in the system. In the tanks seeded with 3 kg fw m(-2), the production of G. vermiculophylla was 0.7 +/- 0.05 kg dw m(-2) month(-1); this biomass removed 221 +/- 12.82 g m(-2) month (-1) of carbon and 40.54 +/- 2.02 g m(-2) month(-1) of nitrogen (+/- 0.03% of the monthly fish N inputs). Temperature and light were the main environmental factors conditioning the growth and nutrient removal performance of the seaweed. With the appropriate upscaling, this pilot IMTA system is ready for implementation at fish aquaculture operations. G. vermiculophylla has proved to be an efficient component of land-based IMTA systems with environmental and potentially economic benefits for the fish farm. (C) 2011 Elsevier B.V. All rights reserved.