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首页> 外文学位 >Regional analysis of seafloor characteristics at reef fish spawning aggregation sites in the Caribbean.
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Regional analysis of seafloor characteristics at reef fish spawning aggregation sites in the Caribbean.

机译：加勒比地区珊瑚礁鱼类产卵聚集点海底特征的区域分析。

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摘要

Overfishing of stock and decreasing biodiversity are grave concerns for the U.S. and the rest of the world. In the Caribbean, one of the critical science gaps hindering effective management is the lack of information on how environmental factors may make fish spawning aggregation (FSA) sites optimal for spawning. Understanding and applying spatial information of marine species' reproductive ecology and critical life habitat such as the patterns of seafloor characteristics of FSA sites is vital to efficiently design marine protected areas (MPAs) to help rebuild regional fish stocks.;The specific goals of the study were: (1) to map the seafloor at historically known grouper and snapper spawning aggregation sites in three different countries, and (2) to characterize quantitatively the geomorphology of the sites including horizontal and vertical curvature profiles of the reefs, bottom depth at spawning sites, distance between spawning sites and shelf-edges/reef promontory tips, and the shortest distance between the spawning sites and 100 m water depth. These data were field-collected with a global positioning system (GPS) and eco-sounder that provided latitude/longitude and depth. The point data were interpolated to surfaces in GIS to determine slope, curvature, and distance from spawning sites and three-dimensional reef structures.;This study revealed that all 12 known Nassau grouper spawning aggregation sites in Belize and 5 known sites in the Cayman Islands were located at convex-shaped seaward extending reefs (reef promontories) jutting into deep water, within 1 km of reef promontory tips. However, spawning aggregations did not always occur at the tips of reef promontories, though all were found along the shelf edges within 1 km of promontory tips. Sixteen sites were multi-species spawning sites. These general characteristics were used to predict an undiscovered multi-species spawning aggregation in Belize. A successful prediction in Belize, together with the compiled data from multiple sites indicate: (1) reef promontories are vital locations for transient reef fish spawning aggregations, (2) three-dimensional information and analysis are necessary to locate grouper and snapper FSA sites, and (3) this study provides a potential tool for not only design for MPAs but also prediction of unknown spawning sites in the Caribbean.
机译：种群过度捕捞和生物多样性减少是美国和世界其他地区的严重关切。在加勒比海地区，阻碍有效管理的关键科学空白之一是缺乏有关环境因素如何使鱼类产卵聚集（FSA）场所最适合产卵的信息。了解和应用海洋物种生殖生态学和关键生命栖息地的空间信息（例如FSA站点的海底特征模式）对于有效设计海洋保护区（MPA）以帮助重建区域鱼类种群至关重要。研究的具体目标分别是：（1）在三个不同国家的历史上已知的石斑鱼和鲷鱼产卵聚集点绘制海底图，（2）定量表征该礁石的地貌，包括礁石的水平和垂直曲率剖面，产卵点的底部深度，产卵点与架子边缘/礁海角之间的距离，以及产卵点与100 m水深之间的最短距离。这些数据是通过提供纬度/经度和深度的全球定位系统（GPS）和生态探测仪现场采集的。将点数据内插到GIS中的表面，以确定坡度，曲率以及与产卵地点和三维礁石结构的距离。;这项研究表明，伯利兹的所有12个已知拿骚石斑鱼产卵聚集地点和开曼群岛的5个已知地点它们位于凸出的向海延伸礁（礁海角）上，伸入深水区，距礁海角顶端1公里以内。然而，虽然所有的产卵聚集体都发生在海角尖端1 km以内的架子边缘，但并非总是发生在海角尖端。 16个地点是多物种产卵地点。这些一般特征被用来预测伯利兹未发现的多物种产卵聚集。在伯利兹成功进行的预测以及来自多个地点的汇总数据表明：（1）珊瑚礁海角是短暂的珊瑚礁鱼类产卵聚集的重要场所，（2）定位石斑鱼和鲷鱼FSA地点需要三维信息和分析， （3）这项研究不仅为MPA设计提供了潜在的工具，而且还为预测加勒比地区未知的产卵场提供了可能。

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  • 作者

    Kobara, Shinichi.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Physical Oceanography.;Geomorphology.;Marine Geology.;Biology Oceanography.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 155 p.
  • 总页数 155
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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