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Interactive effects of fishing effort reduction and climate change in a central Mediterranean fishing area: Insights from bio-economic indices derived from a dynamic food-web model
Frontiers in Marine Science ( IF 2.8 ) Pub Date : 2022-08-12 , DOI: 10.3389/fmars.2022.909164
Davide Agnetta , Fabio Badalamenti , Francesco Colloca , Gianpiero Cossarini , Fabio Fiorentino , Germana Garofalo , Bernardo Patti , Carlo Pipitone , Tommaso Russo , Cosimo Solidoro , Simone Libralato

Disentangling the effects of mixed fisheries and climate change across entire food-webs requires a description of ecosystems using tools that can quantify interactive effects as well as bio-economic aspects. A calibrated dynamic model for the Sicily Channel food web, made up of 72 functional groups and including 13 fleet segments, was developed. A temporal simulation until 2050 was conducted to evaluate the bio-economic interactive effects of the reduction of bottom trawling fishing effort by exploring different scenarios that combine fishery and climate change. Our results indicate that direct and indirect effects produce a net increase in biomass of many functional groups with immediate decline of trawlers’ catches and economic incomes, followed by a long term increase mainly due to biomass rebuilding of commercial species which lasts 5-10 years after fishing reduction. Synergistic and antagonistic effects caused by changes in the fishing effort and in climate characterize a specific functional group’s response in biomass which, in turn, modulate also the catch and income of the other fleets, and especially of those sharing target resources. However, trawler’s intra-fleet competition is higher than the others fleet effects. In the medium term, the effects of fishing effort reduction are higher than those of climate change and seem to make exploitation of marine resources more sustainable over time and fishery processes more efficient by improving ecosystem health.



中文翻译:

地中海中部捕捞区捕捞努力减少和气候变化的交互影响:来自动态食物网模型的生物经济指数的见解

要解开混合渔业和气候变化对整个食物网的影响,需要使用可以量化交互影响和生物经济方面的工具来描述生态系统。开发了西西里海峡食物网的校准动态模型,该模型由 72 个功能组组成,包括 13 个船队段。通过探索结合渔业和气候变化的不同情景,进行了到 2050 年的时间模拟,以评估减少底拖网捕捞工作量的生物经济互动效应。我们的结果表明,直接和间接影响会导致许多功能组的生物量净增加,同时拖网渔船的渔获量和经济收入会立即下降,其次是长期增长,主要是由于商业物种的生物量重建,在捕捞减少后持续 5-10 年。由捕捞努力和气候变化引起的协同效应和对抗效应表征了特定功能组对生物量的反应,这反过来也调节其他船队的渔获量和收入,特别是那些共享目标资源的船队。然而,拖网渔船的船内竞争高于其他船队效应。从中期来看,减少捕捞工作量的影响高于气候变化的影响,并且似乎随着时间的推移使海洋资源的开发更加可持续,并且通过改善生态系统健康来提高渔业过程的效率。由捕捞努力和气候变化引起的协同效应和对抗效应表征了特定功能组对生物量的反应,这反过来也调节其他船队的渔获量和收入,特别是那些共享目标资源的船队。然而,拖网渔船的船内竞争高于其他船队效应。从中期来看,减少捕捞工作量的影响高于气候变化的影响,并且似乎随着时间的推移使海洋资源的开发更加可持续,并且通过改善生态系统健康来提高渔业过程的效率。由捕捞努力和气候变化引起的协同效应和对抗效应表征了特定功能组对生物量的反应,这反过来也调节其他船队的渔获量和收入,特别是那些共享目标资源的船队。然而,拖网渔船的船内竞争高于其他船队效应。从中期来看,减少捕捞工作量的影响高于气候变化的影响,并且似乎随着时间的推移使海洋资源的开发更加可持续,并且通过改善生态系统健康来提高渔业过程的效率。拖网渔船的船内竞争高于其他船队效应。从中期来看,减少捕捞工作量的影响高于气候变化的影响,并且似乎随着时间的推移使海洋资源的开发更加可持续,并且通过改善生态系统健康来提高渔业过程的效率。拖网渔船的船内竞争高于其他船队效应。从中期来看,减少捕捞工作量的影响高于气候变化的影响,并且似乎随着时间的推移使海洋资源的开发更加可持续,并且通过改善生态系统健康来提高渔业过程的效率。

更新日期:2022-08-12
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