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Recovery of critically endangered Nassau grouper (Epinephelus striatus) in the Cayman Islands following targeted conservation actions.
Proceedings of the National Academy of Sciences of the United States of America ( IF 9.4 ) Pub Date : 2020-01-21 , DOI: 10.1073/pnas.1917132117
Lynn Waterhouse 1, 2 , Scott A Heppell 3 , Christy V Pattengill-Semmens 4 , Croy McCoy 5, 6 , Phillippe Bush 5 , Bradley C Johnson 5 , Brice X Semmens 1
Affiliation  

Many large-bodied marine fishes that form spawning aggregations, such as the Nassau grouper (Epinephelus striatus), have suffered regional overfishing due to exploitation during spawning. In response, marine resource managers in many locations have established marine protected areas or seasonal closures to recover these overfished stocks. The challenge in assessing management effectiveness lies largely in the development of accurate estimates to track stock size through time. For the past 15 y, the Cayman Islands government has taken a series of management actions aimed at recovering collapsed stocks of Nassau grouper. Importantly, the government also partnered with academic and nonprofit organizations to establish a research and monitoring program (Grouper Moon) aimed at documenting the impacts of conservation action. Here, we develop an integrated population model of 2 Cayman Nassau grouper stocks based on both diver-collected mark-resight observations and video censuses. Using both data types across multiple years, we fit parameters for a state-space model for population growth. We show that over the last 15 y the Nassau grouper population on Little Cayman has more than tripled in response to conservation efforts. Census data from Cayman Brac, while more sparse, show a similar pattern. These findings demonstrate that spatial and seasonal closures aimed at rebuilding aggregation-based fisheries can foster conservation success.

中文翻译:

采取有针对性的保护行动后,在开曼群岛恢复了极度濒危的拿骚石斑鱼(Epinephelus striatus)。

许多形成产卵集合体的大型鱼类,例如拿骚石斑鱼(Epinephelus striatus),由于产卵期间的剥削而遭受区域性过度捕捞。作为响应,许多地方的海洋资源管理者已经建立了海洋保护区或季节性关闭以恢复这些过度捕捞的种群。评估管理有效性的挑战主要在于开发准确的估计值以跟踪时间的库存量。在过去的15年中,开曼群岛政府采取了一系列管理措施,目的是收回倒闭的拿骚石斑鱼种群。重要的是,政府还与学术机构和非营利组织合作,建立了一个研究和监测计划(Grouper Moon),旨在记录保护行动的影响。这里,我们根据潜水员收集的标记监督观察结果和视频普查结果,开发了2种开曼拿骚石斑鱼种群的综合种群模型。使用多年的两种数据类型,我们拟合人口增长的状态空间模型的参数。我们显示,在过去的15年中,小开曼岛的拿骚石斑鱼种群数量增长了两倍多,这是对保护工作的回应。开曼布拉克(Cayman Brac)的人口普查数据虽然较为稀疏,但却显示出类似的模式。这些发现表明,旨在重建以聚集为基础的渔业的空间和季节封锁可以促进保护成功。我们显示,在过去的15年中,小开曼岛的拿骚石斑鱼种群数量增长了两倍多,这是对保护工作的回应。开曼布拉克(Cayman Brac)的人口普查数据虽然较为稀疏,但却显示出类似的模式。这些发现表明,旨在重建以聚集为基础的渔业的空间和季节关闭可以促进保护成功。我们显示,在过去的15年中,小开曼岛的拿骚石斑鱼种群数量增长了两倍多,这是对保护工作的回应。开曼布拉克(Cayman Brac)的人口普查数据虽然较为稀疏,但却显示出类似的模式。这些发现表明,旨在重建以聚集为基础的渔业的空间和季节封锁可以促进保护成功。
更新日期:2020-01-21
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