Abstract

A large extent of brackishwater resources is yet to be used for aquaculture as the present development stands at only 13% in India. But, growing environmental concerns and crop failures have made site selection a mandatory requirement for cage aquaculture. The case study carried out at Muttukadu Lagoon, India, has used 13 factors to assess cage site suitability, including physical characteristics and environmental conditions. Spatial analysis has integrated the most influencing variables such as depth, turbidity, salinity, temperature, dissolved oxygen, pH, and total ammonia nitrogen using suitability scores and its comparative rank. pH, salinity, temperature, and TAN were in the acceptable range throughout the year. Concerning depth, turbidity, and dissolved oxygen, 12–52%, 30–91%, and 84–91% of the lagoon were found to be suitable at different seasons. Overall, 11% of the lagoon region was found to be fit for cage aquaculture. Water depth was the major limiting factor in cage site selection. From the study, crucial management measures are outlined for successful fish culture and maintain the lagoon's health. This study will serve as a model to make use of the brackish-water regions to support the coastal population's livelihoods.

Research Highlights

• Cage aquaculture can increase fish production and support the livelihoods of the coastal population

• Zero-footprint brackishwater lagoons and estuaries can be used for cage aquaculture

• Physical and environmental factors and their seasonal variations were incorporated in site selection using spatial analysis

• Identified sites can provide conducive environment for an entire farm cycle.

• Management measures are needed to preserve the conducive lagoon environment throughout the year.

中文翻译：

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使用多准则决策支持（MCDS）空间分析绘制沿海泻湖特征以适应水产养殖的需求：以印度东南沿海地区为例

摘要

由于印度目前的发展仅占13％，因此大量的咸淡水资源尚未用于水产养殖。但是，越来越多的环境问题和农作物歉收使选址成为网箱养殖的强制性要求。在印度Muttukadu泻湖进行的案例研究使用了13个因素来评估网箱的位置适应性，包括物理特征和环境条件。空间分析使用适合性评分及其比较等级，综合了影响最大的变量，例如深度，浊度，盐度，温度，溶解氧，pH和总氨氮。全年的pH，盐度，温度和TAN都在可接受的范围内。关于深度，浊度和溶解氧，分别为12–52％，30–91％，发现有84-91％的泻湖适合不同季节。总体而言，发现泻湖区域的11％适合网箱养殖。水深是选择网箱地点的主要限制因素。从研究中，概述了成功进行鱼类养殖和维持泻湖健康的关键管理措施。这项研究将成为利用咸淡水区域支持沿海人口生计的模型。

研究重点

• 网箱养殖可以增加鱼类产量并支持沿海人口的生计

• 零足迹的咸淡水泻湖和河口可用于网箱养殖

• 使用空间分析将物理和环境因素及其季节性变化纳入选址

• 确定的站点可以为整个服务器场周期提供有利的环境。

• 需要采取管理措施来全年保持有利的泻湖环境。