西非东佛得角沿海贻贝动物群基线评估

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Zeddy T. A. Seymour, Ze Luis Monteiro, Angelito Monteiro, Ivy E. Baremore, Francesco Garzon, Rachel T. Graham
{"title":"西非东佛得角沿海贻贝动物群基线评估","authors":"Zeddy T. A. Seymour,&nbsp;Ze Luis Monteiro,&nbsp;Angelito Monteiro,&nbsp;Ivy E. Baremore,&nbsp;Francesco Garzon,&nbsp;Rachel T. Graham","doi":"10.1002/aqc.4206","DOIUrl":null,"url":null,"abstract":"<p>An increasing onus on elasmobranch management by regional bodies has been hindered by a lack of data on abundance, distribution and fisheries, especially in data-poor areas like the eastern Atlantic Ocean. From 2015 through 2017, 204 baited remote underwater videos (BRUV) were deployed in Cabo Verde around the eastern islands of Sal, Boavista and Maio and the remote offshore reef João Valente to establish a baseline of elasmobranch abundance. Over 200 hours of footage revealed 215 individual elasmobranchs, spanning 14 species from 6 taxonomic families. The abundance of elasmobranchs was highest in Maio, the island with the smallest human population, followed by Boavista and Sal. Smaller-bodied meso-predatory species such as the common smoothhound (<i>Mustelus mustelus</i>) and the Atlantic weasel shark (<i>Paragaleus pectoralis</i>) constituted the majority of observations in Maio and Boavista. Inversely, <i>Carcharhinus</i> spp. were observed in considerably greater abundance in Sal, and there was notably lower abundance of small-bodied sharks at sites with high large-bodied Carcharhinid abundance. Species richness was consistent with abundance estimates across islands, with Boavista and Sal recording the highest species diversity, followed by Maio. Results suggest that amongst Cabo Verde's eastern islands, there exists a high relative diversity and abundance of coastal elasmobranchs compared to populations in West Africa. Nonetheless, there is evidence of exploitation of higher trophic levels species. This trend is most notable in the decreasing abundance of Carcharhinids with increasing proximity to the capital city Praia, suggesting that fishing efforts from the capital are negatively affecting the abundance of large-bodied, higher-trophic predators.</p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 9","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Baseline assessment of the coastal elasmobranch fauna of Eastern Cabo Verde, West Africa\",\"authors\":\"Zeddy T. A. Seymour,&nbsp;Ze Luis Monteiro,&nbsp;Angelito Monteiro,&nbsp;Ivy E. Baremore,&nbsp;Francesco Garzon,&nbsp;Rachel T. Graham\",\"doi\":\"10.1002/aqc.4206\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>An increasing onus on elasmobranch management by regional bodies has been hindered by a lack of data on abundance, distribution and fisheries, especially in data-poor areas like the eastern Atlantic Ocean. From 2015 through 2017, 204 baited remote underwater videos (BRUV) were deployed in Cabo Verde around the eastern islands of Sal, Boavista and Maio and the remote offshore reef João Valente to establish a baseline of elasmobranch abundance. Over 200 hours of footage revealed 215 individual elasmobranchs, spanning 14 species from 6 taxonomic families. The abundance of elasmobranchs was highest in Maio, the island with the smallest human population, followed by Boavista and Sal. Smaller-bodied meso-predatory species such as the common smoothhound (<i>Mustelus mustelus</i>) and the Atlantic weasel shark (<i>Paragaleus pectoralis</i>) constituted the majority of observations in Maio and Boavista. Inversely, <i>Carcharhinus</i> spp. were observed in considerably greater abundance in Sal, and there was notably lower abundance of small-bodied sharks at sites with high large-bodied Carcharhinid abundance. Species richness was consistent with abundance estimates across islands, with Boavista and Sal recording the highest species diversity, followed by Maio. Results suggest that amongst Cabo Verde's eastern islands, there exists a high relative diversity and abundance of coastal elasmobranchs compared to populations in West Africa. Nonetheless, there is evidence of exploitation of higher trophic levels species. This trend is most notable in the decreasing abundance of Carcharhinids with increasing proximity to the capital city Praia, suggesting that fishing efforts from the capital are negatively affecting the abundance of large-bodied, higher-trophic predators.</p>\",\"PeriodicalId\":55493,\"journal\":{\"name\":\"Aquatic Conservation-Marine and Freshwater Ecosystems\",\"volume\":\"34 9\",\"pages\":\"\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Aquatic Conservation-Marine and Freshwater Ecosystems\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/aqc.4206\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Conservation-Marine and Freshwater Ecosystems","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/aqc.4206","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

由于缺乏有关丰度、分布和渔业的数据,尤其是在大西洋东部等数据匮乏的地区,区域机构对鞘鳃类动物管理的责任越来越大,这阻碍了鞘鳃类动物的管理。从 2015 年到 2017 年,在佛得角的萨尔岛、博阿维斯塔岛和马约岛等东部岛屿以及若昂-瓦伦特(João Valente)偏远近海珊瑚礁周围部署了 204 个带饵远程水下视频(BRUV),以建立鞘鳃类丰度基线。经过 200 多个小时的拍摄,发现了 215 个鞘鳃类个体,涵盖 6 个分类科 14 个物种。马约岛的箭亚纲动物数量最多,该岛的人口最少,其次是博阿维斯塔岛和萨尔岛。在马约岛和博阿维斯塔岛观察到的大多数鱼类都是体型较小的中型食肉鱼类,如普通圆滑猎犬(Mustelus mustelus)和大西洋鼬鲨(Paragaleus pectoralis)。相反,在萨尔观测到的鲯鳅数量要多得多,在鲯鳅数量较多的地点,小体型鲨鱼的数量明显较少。各岛的物种丰富度与丰度估计值一致,博阿维斯塔岛和萨尔岛的物种多样性最高,其次是马约岛。研究结果表明,与西非相比,佛得角东部岛屿沿海鞘鳃类动物的相对多样性和丰度都很高。然而,有证据表明,较高营养级的物种受到了开发。这种趋势最明显的表现是,随着距离首都普拉亚的距离增加,胭脂鱼的数量也在减少,这表明首都的捕捞活动对体型较大、营养水平较高的食肉动物的数量产生了负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Baseline assessment of the coastal elasmobranch fauna of Eastern Cabo Verde, West Africa

An increasing onus on elasmobranch management by regional bodies has been hindered by a lack of data on abundance, distribution and fisheries, especially in data-poor areas like the eastern Atlantic Ocean. From 2015 through 2017, 204 baited remote underwater videos (BRUV) were deployed in Cabo Verde around the eastern islands of Sal, Boavista and Maio and the remote offshore reef João Valente to establish a baseline of elasmobranch abundance. Over 200 hours of footage revealed 215 individual elasmobranchs, spanning 14 species from 6 taxonomic families. The abundance of elasmobranchs was highest in Maio, the island with the smallest human population, followed by Boavista and Sal. Smaller-bodied meso-predatory species such as the common smoothhound (Mustelus mustelus) and the Atlantic weasel shark (Paragaleus pectoralis) constituted the majority of observations in Maio and Boavista. Inversely, Carcharhinus spp. were observed in considerably greater abundance in Sal, and there was notably lower abundance of small-bodied sharks at sites with high large-bodied Carcharhinid abundance. Species richness was consistent with abundance estimates across islands, with Boavista and Sal recording the highest species diversity, followed by Maio. Results suggest that amongst Cabo Verde's eastern islands, there exists a high relative diversity and abundance of coastal elasmobranchs compared to populations in West Africa. Nonetheless, there is evidence of exploitation of higher trophic levels species. This trend is most notable in the decreasing abundance of Carcharhinids with increasing proximity to the capital city Praia, suggesting that fishing efforts from the capital are negatively affecting the abundance of large-bodied, higher-trophic predators.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
×
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