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Application of the Ecopath model for evaluation of ecological structure and function for fisheries management: A case study from fisheries in coastal Andaman Sea, Thailand
Regional Studies in Marine Science ( IF 2.1 ) Pub Date : 2021-08-16 , DOI: 10.1016/j.rsma.2021.101972
Nichakan Srithong 1 , Kathe R. Jensen 2 , Ananya Jarernpornnipat 1
Affiliation  

The Andaman Coastal Sea provides a rich resource of seafood as well as a major contribution to the socio-economy of many local communities in Thailand. The aim of this study is to model food web structure and estimate energy flow through trophic levels using the Ecopath tool. Data have been collected on fish length, weight and diet composition from three provinces, Krabi, Phuket and Phangnga along the Andaman Sea coast of Thailand. Data from commercial as well as artisanal fishing ports were entered into the model. The model computed data for trophic level, food web structure, and ecological function of functional groups. The results indicate that the coastal ecosystem of the Andaman Sea is composed of five aggregated trophic levels of 46 functional groups, ranking from 1.0 to 4.227. The total system throughput is 9162.513 t km2 y1 and internal consumption, respiration, flow into detritus, and export out of the system accounts for 28.83%, 16.06%, 28.34%, and 26.77%, respectively. The Mixed Tropic Impact (MTI) shows detritus and low trophic level groups make a significant contribution to the diet of groups at higher trophic levels. Planktivorous fishes are important components of food web structure. The total system throughput analysis indicates that the ecosystem is in a relatively immature state. Pedigree analysis showed that the model has high reliability. The application of the model for fisheries management is discussed. In particular, the use of the model for local Fisheries Improvement Projects is recommended.



中文翻译:

Ecopath 模型在渔业管理生态结构和功能评估中的应用:以泰国安达曼海沿岸渔业为例

安达曼沿海提供了丰富的海产品资源,并对泰国许多当地社区的社会经济做出了重大贡献。本研究的目的是使用 Ecopath 工具模拟食物网结构并估计通过营养级的能量流。已经从泰国安达曼海沿岸的甲米、普吉岛和攀牙三个省收集了有关鱼的长度、重量和饮食成分的数据。来自商业和手工渔港的数据被输入到模型中。该模型计算了功能群的营养水平、食物网结构和生态功能的数据。结果表明,安达曼海沿岸生态系统由46个功能组的5个聚合营养级组成,等级从1.0到4.227。系统总吞吐量为9162.513吨公里-2-1系统内消耗、呼吸、流入碎屑和流出系统分别占28.83%、16.06%、28.34%和26.77%。混合热带影响 (MTI) 显示碎屑和低营养水平群体对较高营养水平群体的饮食做出了重大贡献。浮游鱼类是食物网结构的重要组成部分。系统总吞吐量分析表明,生态系统处于相对不成熟的状态。系谱分析表明,该模型具有较高的可靠性。讨论了该模型在渔业管理中的应用。特别是,建议将该模型用于当地渔业改进项目。

更新日期:2021-08-27
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