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首页> 外文期刊>ICES Journal of Marine Science >Using electronic monitoring to record catches of sole (Solea solea) in a bottom trawl fishery
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Using electronic monitoring to record catches of sole (Solea solea) in a bottom trawl fishery

机译：使用电子监控记录底拖网渔业中的唯一（Solea solea）渔获量

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摘要

Electronic monitoring (EM) is often presented as a solution to document all catches through video observations under the EU landing obligation. However, identifying small fish on video in large volumes of catch is challenging. In this study, logbook records were compared with video observations for catches to test efficacy of EM for different size classes of sole (Solea solea) on board bottom trawlers. Comparisons were based on: (i) systematic differences (paired t-test), (ii) linear correlation (Pearson's r), and (iii) absolute agreement (ICC). Results suggest that EM of small individuals in mixed fisheries is not as effective as it is for large individuals. To improve efficiency for estimating quantities of small fish, additional methods are required to enhance video review. One possible method for enhancing video review is using a protocol where crew arranged the individual fish in front of the cameras. Indeed, this study suggests that such a protocol substantially improves EM of the complete catch. However, the protocol requires an additional three minutes of processing time per haul for a single species. Given the large number of quota species under the landing obligation for this fishery, implementing the protocol thus comes with a cost for the fishing industry; the extra time needed to conduct a simple protocol probably would exceed 12 h per fishing trip.
机译：电子监视（EM）通常作为解决方案来提供，以根据欧盟着陆义务通过视频观察记录所有捕获物。但是，在大量捕获的视频中识别小鱼是一项挑战。在这项研究中，将日志记录与渔获物的视频观察结果进行比较，以测试不同大小级别的底拖网渔船上EM的功效（Solea solea）。比较基于：（i）系统差异（配对t检验），（ii）线性相关性（Pearson's r）和（iii）绝对一致性（ICC）。结果表明，混合渔业中小型个体的EM效果不如大型个体有效。为了提高估算小鱼数量的效率，还需要其他方法来增强视频审查。增强视频审查的一种可能方法是使用一种协议，在该协议中，工作人员将单个鱼安排在摄像机的前面。确实，这项研究表明，这样的协议可以大大提高整个渔获物的EM。但是，对于单个物种，该协议每次运输需要额外的三分钟处理时间。鉴于该渔业的着陆义务中有大量的定额物种，因此实施议定书将给渔业增加成本；进行一次简单规约所需的额外时间，每次钓鱼行程可能会超过12小时。

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