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首页> 外文期刊>ICES Journal of Marine Science >On the target strength of Baltic clupeids
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On the target strength of Baltic clupeids

机译:论波罗的海的目标实力

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摘要

The acoustic backscattering of Baltic clupeids, herring and sprat, is explored to improve biomass estimation of these ecologically and commercially important species. Modelling approaches that account for the complexity of fish morphology are used to compute the mean backscattering cross section. The input data for modelling are based on X-ray radiographs of Baltic herring and sprat. The back-scatter sensitivity to fish morphology and to other biological (fat content), acoustic (frequency), behavioural (orientation pattern), and environmental (depth and salinity) parameters is also analysed. The effect of various parameters on the TS-L relationship of Baltic clupeids is studied, and the possibility of using the same TS-L relationships for Baltic herring and sprat is discussed. The results improve the understanding of the spatial and temporal variability of the measured target strength of clupeids in the Baltic Sea.
机译:研究了波罗的海丘陵鱼,鲱鱼和西鲱的声学反向散射,以改善这些对生态和商业重要物种的生物量估计。考虑鱼形态复杂性的建模方法用于计算平均反向散射截面。用于建模的输入数据基于波罗的海鲱和鲱鱼的X射线照片。还分析了对鱼类形态和其他生物(脂肪含量),声学(频率),行为(定向模式)和环境(深度和盐度)参数的反向散射敏感性。研究了各种参数对波罗的海沙丘TS-L关系的影响,并讨论了将相同的TS-L关系用于波罗的海鲱和西鲱的可能性。结果提高了对在波罗的海测量的丘比特目标强度的时空变化的认识。

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