Quantification of Habitat and Community Relationships among Nearshore Temperate Fishes Through Analysis of Drop Camera Video
Quantification of Habitat and Community Relationships among Nearshore Temperate Fishes Through Analysis of Drop Camera Video
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DOI：
10.1080/19425120.2015.1007184
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发表时间：
2015-01-01
影响因子：
1.7
通讯作者：
Hannah, Robert W.
中科院分区：
文献类型：
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作者：
Easton, Ryan R.;Heppell, Selina S.;Hannah, Robert W.
北美太平洋沿岸沿着的温带近岸珊瑚礁对商业和休闲渔业非常有价值，但只占海底的一小部分。监测这一区域的渔业资源是困难的;高起伏结构的复杂性和不利的海洋条件导致了温带珊瑚礁物种组合模式的信息匮乏。需要可靠、廉价的监测工具和方法，因为许多传统工具在后勤上既复杂又昂贵，限制了大规模实施的频率。不同设计的视频下降相机以前曾被用来估计鱼类的丰度和分布。我们在2011年春季和冬季用视频着陆器（安装在着陆平台上的视频摄像机，以便它可以下降到海底）调查了北方俄勒冈州海岸的近岸岩礁。我们设计了一个272点的系统网格记录的物种组合和分布和栖息地协会的珊瑚礁物种，包括两个过度捕捞的岩鱼：金丝雀岩鱼？物种组合不同的深度和季节的珊瑚礁的外部的珊瑚礁。许多物种都存在明确的栖息地关联;金丝雀岩鱼与复杂的中等起伏栖息地类型（如大巨石和小巨石）相关，而黄眼岩鱼与高起伏栖息地（如垂直墙）相关。物种协会进行了评估成对确定近岸复合体。我们将我们的地点与俄勒冈州中部海岸的五个探索性珊瑚礁地点进行了比较，发现近岸珊瑚礁与我们的地点不同，而近海珊瑚礁则更为相似。视频着陆器提供了一种解决办法，以满足对条件困难的温带珊瑚礁系统增加取样的需要，并有助于生境绘图、鱼类丰度指数和鱼类组合信息，以监测和管理渔业资源。
Temperate nearshore reefs along the Pacific coast of North America are highly valuable to commercial and recreational fisheries yet comprise a small fraction of the seabed. Monitoring fisheries resources in this region is difficult; high-relief structural complexity and adverse sea conditions have led to a paucity of information on temperate reef species assemblage patterns. Reliable, inexpensive tools and methods for monitoring are needed, as many traditional tools are both logistically complicated and expensive, limiting the frequency of their implementation over a large scale. Video drop cameras of varying designs have previously been employed to estimate fish abundance and distribution. We surveyed a nearshore rocky reef off the northern Oregon coast with a video lander (a video camera mounted on a landing platform so it can be dropped to the seafloor) over the spring and winter of 2011. We designed a 272-point systematic grid to document the species assemblage and the distribution and habitat associations of the reef species, including two overfished rockfishes: Canary Rockfish Sebastes pinniger and Yelloweye Rockfish Sebastes ruberrimus. Species assemblages differed significantly across the reef by depth and by season for the outer part of the reef. Well-defined habitat associations existed for many species; Canary Rockfish were associated with complex moderate-relief habitat types such as large boulders and small boulders, while Yelloweye Rockfish were associated with high-relief habitats like vertical walls. Species associations were evaluated pairwise to identify nearshore complexes. We compared our site with five exploratory reef sites off the central Oregon coast and found that nearshore reefs differed from our site, while offshore reefs were more similar. Video landers provide a solution to the need for increased sampling of temperate reef systems that are subject to difficult conditions and can contribute to habitat mapping, fish abundance indices, and fish assemblage information for monitoring and management of fisheries resources.