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首页> 外文期刊>ICES Journal of Marine Science >An expanded target-strength relationship for herring
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An expanded target-strength relationship for herring

机译：扩大的鲱鱼目标强度关系

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Target-strength (TS) experiments on captive, adult herring have been conducted at intervals over several years to investigate the acoustic effect of pressure and seasonal changes on fish physiology. Experiments in a large, net pen (4500m~3) were done at 18, 38, and 120kHz frequencies with calibrated, split-beam echosounders. The main ex situ results at 38 kHz, including a vertical-excursion experiment, were combined with in situ TS data collected at 38kHz with a probing, split-beam transducer lowered into the dense herring layers, recorded during two surveys in the wintering area of the Norwegian spring-spawning stock. Multiple-linear regression analysis was used to investigate the functional relationship between TS and the measured parameters. The mean TS of herring was found to be significantly dependent on the depth (pressure) and the gonadosomatic index. These are the additional parameters included in the new TS relationship.
机译：过去几年中，每隔一段时间对成年鲱鱼进行目标强度（TS）实验，以研究压力和季节变化对鱼类生理的声学影响。使用校准的分束式回声测深仪，分别在18、38和120kHz频率下，在大型净笔（4500m〜3）中进行实验。 38 kHz的主要非原位测量结果（包括垂直偏移实验）与38kHz收集的原位TS数据结合在一起，探查式分束换能器降低到致密的鲱鱼层中，在两次越冬地区的调查中记录挪威春季产卵种群。使用多元线性回归分析来研究TS和测量参数之间的功能关系。发现鲱鱼的平均TS显着取决于深度（压力）和性腺体指数。这些是新的TS关系中包含的其他参数。

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