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首页> 外文期刊>ICES Journal of Marine Science >Statistical relationships between the distributions of groundfish and crabs in the eastern Bering Sea and processed returns from a single-beam echosounder
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Statistical relationships between the distributions of groundfish and crabs in the eastern Bering Sea and processed returns from a single-beam echosounder

机译：白令海东部底栖鱼类和螃蟹的分布与单波束回波测深仪处理后的回波之间的统计关系

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摘要

Groundfish and benthic invertebrates are not randomly distributed over the continental shelf of the eastern Bering Sea (EBS). Annual trawl surveys reveal distributional patterns that vary according to species, and substantial interannual variation in these patterns suggests some degree of environmental control. Quantitative habitat models are developed to explain the distribution and abundance of species in the EBS. Simple models based on readily available data (temperature and depth) are somewhat informative, but offer limited practical value. Earlier research in the EBS indicated that surficial sediments affect the distribution and abundance of groundfish. However, traditional sampling with grabs and cores is impractical over large areas, and an efficient sampling strategy is needed. Echosounders allow surveys of large areas, but it is unknown if they measure the relevant properties of sediments. Seabed echoes from a calibrated, single-beam echosounder were recorded over 17 000 km of trackline covering the EBS shelf. Generalized additive models were used to fit acoustic and other variables to abundance data for ten species. The final models explained 28-77% of the variability in abundances, including a marginal contribution of 2-13% by the acoustic predictors.
机译：底栖鱼类和底栖无脊椎动物并非在白令海东部（EBS）的大陆架上随机分布。年度拖网调查揭示了根据物种而变化的分布模式，这些模式中的年际变化很大，表明了一定程度的环境控制。建立定量生境模型来解释EBS中物种的分布和丰富度。基于容易获得的数据（温度和深度）的简单模型在某种程度上具有参考价值，但实用价值有限。 EBS的早期研究表明，表层沉积物会影响底层鱼类的分布和丰度。但是，传统的带有抓斗和岩心的采样在大面积上是不切实际的，因此需要一种有效的采样策略。回声测深仪可以进行大范围的勘测，但是否测量沉积物的相关特性尚不清楚。在覆盖EBS架的17,000 km航迹线上记录了来自校准的单波束回波测深仪的海底回波。通用的加性模型用于将声学和其他变量拟合到十个物种的丰度数据。最终模型解释了丰度变化的28-77％，包括声学预测变量的2-13％的边际贡献。

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