Quantifying the impact of habitat modifications on species behavior and mortality: A case study of tropical tuna

IF 4.3 2区 环境科学与生态学 Q1 ECOLOGY
Amaël Dupaix, Laurent Dagorn, Jean-Louis Deneubourg, Manuela Capello
{"title":"Quantifying the impact of habitat modifications on species behavior and mortality: A case study of tropical tuna","authors":"Amaël Dupaix,&nbsp;Laurent Dagorn,&nbsp;Jean-Louis Deneubourg,&nbsp;Manuela Capello","doi":"10.1002/eap.3018","DOIUrl":null,"url":null,"abstract":"<p>Ecosystems and biodiversity across the world are being altered by human activities. Habitat modification and degradation are among the most important drivers of biodiversity loss. These modifications can have an impact on species behavior, which can, in turn, impact their mortality. While several studies have investigated the impacts of habitat degradation and fragmentation on terrestrial species, the extent to which habitat modifications affect the behavior and fitness of marine species is still largely unknown, particularly for pelagic species. Since the early 1990s, industrial purse seine vessels targeting tuna have started deploying artificial floating objects—Drifting Fish Aggregating Devices (DFADs)—in all oceans to increase tuna catchability. Since then, the massive deployment of DFADs has modified tuna surface habitat, by increasing the density of floating objects, with potential impacts on tuna associative behavior and mortality. In this study, we investigate these impacts for yellowfin tuna in the Indian Ocean. Using an individual-based model based on a correlated random walk and newly available data on DFAD densities, we quantify for the first time how the increase in floating object density, due to DFAD use, affects the percentage of time that yellowfin tuna spend associated, which, in turn, directly impacts their availability to fishers and fishing mortality. This modification of tuna associative behavior could also have indirect impacts on their fitness, by retaining tuna in areas detrimental to them or disrupting schooling behavior. Hence, there is an urgent need to further investigate DFAD impacts on tuna behavior, in particular, taking social behavior into account, and to continue regulation efforts on DFAD use and monitoring.</p>","PeriodicalId":55168,"journal":{"name":"Ecological Applications","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eap.3018","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecological Applications","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/eap.3018","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Ecosystems and biodiversity across the world are being altered by human activities. Habitat modification and degradation are among the most important drivers of biodiversity loss. These modifications can have an impact on species behavior, which can, in turn, impact their mortality. While several studies have investigated the impacts of habitat degradation and fragmentation on terrestrial species, the extent to which habitat modifications affect the behavior and fitness of marine species is still largely unknown, particularly for pelagic species. Since the early 1990s, industrial purse seine vessels targeting tuna have started deploying artificial floating objects—Drifting Fish Aggregating Devices (DFADs)—in all oceans to increase tuna catchability. Since then, the massive deployment of DFADs has modified tuna surface habitat, by increasing the density of floating objects, with potential impacts on tuna associative behavior and mortality. In this study, we investigate these impacts for yellowfin tuna in the Indian Ocean. Using an individual-based model based on a correlated random walk and newly available data on DFAD densities, we quantify for the first time how the increase in floating object density, due to DFAD use, affects the percentage of time that yellowfin tuna spend associated, which, in turn, directly impacts their availability to fishers and fishing mortality. This modification of tuna associative behavior could also have indirect impacts on their fitness, by retaining tuna in areas detrimental to them or disrupting schooling behavior. Hence, there is an urgent need to further investigate DFAD impacts on tuna behavior, in particular, taking social behavior into account, and to continue regulation efforts on DFAD use and monitoring.

Abstract Image

量化生境改变对物种行为和死亡率的影响:热带金枪鱼案例研究。
人类活动正在改变世界各地的生态系统和生物多样性。栖息地的改变和退化是造成生物多样性丧失的最重要原因之一。这些改变会影响物种的行为,进而影响其死亡率。虽然已有多项研究调查了栖息地退化和破碎化对陆生物种的影响,但栖息地改变对海洋物种行为和适应性的影响程度在很大程度上仍是未知数,尤其是对中上层物种而言。自 20 世纪 90 年代初以来,以金枪鱼为目标的工业围网渔船开始在各大洋部署人工漂浮物--漂流集鱼装置(DFADs),以提高金枪鱼的可捕获量。从那时起,DFADs 的大量部署通过增加漂浮物的密度改变了金枪鱼的表面栖息地,对金枪鱼的结群行为和死亡率产生了潜在影响。在本研究中,我们调查了这些影响对印度洋黄鳍金枪鱼的影响。利用基于相关随机游走的个体模型和新获得的 DFAD 密度数据,我们首次量化了由于使用 DFAD 而导致的漂浮物密度增加如何影响黄鳍金枪鱼的结伴时间百分比,这反过来又直接影响了它们对渔民的可得性和捕捞死亡率。金枪鱼结伴行为的这种改变也会间接影响它们的体能,使金枪鱼停留在对它们不利的区域,或扰乱它们的求学行为。因此,迫切需要进一步研究 DFAD 对金枪鱼行为的影响,特别是考虑到社会行为,并继续对 DFAD 的使用和监测进行监管。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Ecological Applications
Ecological Applications 环境科学-环境科学
CiteScore
9.50
自引率
2.00%
发文量
268
审稿时长
6 months
期刊介绍: The pages of Ecological Applications are open to research and discussion papers that integrate ecological science and concepts with their application and implications. Of special interest are papers that develop the basic scientific principles on which environmental decision-making should rest, and those that discuss the application of ecological concepts to environmental problem solving, policy, and management. Papers that deal explicitly with policy matters are welcome. Interdisciplinary approaches are encouraged, as are short communications on emerging environmental challenges.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信