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Critical information for fisheries monitoring may be available in social media
Aquatic Conservation: Marine and Freshwater Ecosystems ( IF 2.4 ) Pub Date : 2021-07-04 , DOI: 10.1002/aqc.3655
Natalia C. Roos 1 , Guilherme O. Longo 1
Affiliation  

  1. Fisheries monitoring is essential to evaluate and manage fish populations. Effective monitoring is particularly challenging in low- and middle-income countries where fisheries often occur at large spatial scales and include multiple techniques. Recreational spearfishing, for instance, can be detrimental to fish populations and is often underrepresented in management strategies due to the lack of data.
  2. Because recreational fishers frequently share pictures of their catches online, social media can harbour valuable information. As a case study, freely available pictures in social media were used to assess the impacts of spearfishing on the endemic and endangered Brazilian parrotfish, Scarus trispinosus, that has experienced a sharp population decline in recent decades due to overfishing.
  3. It was found that S. trispinosus is widely captured by recreational spearfishing and at larger sizes when compared to artisanal fisheries, revealing complementary fishing pressures operating on different life stages of this species and a lack of compliance to current regulations. The number of users sharing these contents increased between 2007 and 2018, but declined thereafter until 2020.
  4. Identifying where spearfishing is more intense and the most targeted life-stages can inform prioritization of management strategies. Social media can be a rapid and low-cost tool to obtain nationwide fisheries information, especially for recreational fishing activities that have a flawed monitoring.
  5. The public disclosure of ‘trophy fishes’ can reveal lack of compliance to existing regulations and help fill critical information gaps on complementary fishing pressures. This approach may be applicable for many species and types of trophy fishing, providing valuable and useful information for management and conservation.


中文翻译:

社交媒体上可能提供渔业监测的关键信息

  1. 渔业监测对于评估和管理鱼类种群至关重要。在低收入和中等收入国家,有效监测尤其具有挑战性,因为在这些国家,渔业经常发生在大空间尺度并包括多种技术。例如,休闲鱼叉捕鱼可能对鱼类种群有害,并且由于缺乏数据,在管理策略中的代表性不足。
  2. 由于休闲渔民经常在网上分享他们的捕捞照片,社交媒体可以提供有价值的信息。作为一个案例研究,社交媒体上免费提供的图片被用来评估鱼叉捕捞对地方性和濒临灭绝的巴西鹦嘴鱼的影响,由于过度捕捞,近几十年来它的种群数量急剧下降。
  3. 发现与手工渔业相比,S. trispinosus被休闲鱼叉捕捞广泛捕获,并且体型更大,这表明该物种不同生命阶段存在互补的捕捞压力,并且不符合现行法规。分享这些内容的用户数量在 2007 年至 2018 年间有所增加,但此后直到 2020 年才有所下降。
  4. 确定鱼叉捕鱼更频繁的地方和最具针对性的生命阶段可以为管理策略的优先排序提供信息。社交媒体可以成为获取全国渔业信息的快速且低成本的工具,特别是对于监测有缺陷的休闲渔业活动。
  5. “战利品鱼”的公开披露可以揭示对现有法规的不遵守,并有助于填补有关补充捕捞压力的关键信息空白。这种方法可能适用于许多种类和类型的奖杯捕鱼,为管理和保护提供有价值和有用的信息。
更新日期:2021-09-10
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