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首页> 外文会议>International conference on remote sensing for marine and coastal environments >Fisheries acoustic surveys in the Gulf of Maine and Geogres Bank at the Northeast Fisheries Science Center
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Fisheries acoustic surveys in the Gulf of Maine and Geogres Bank at the Northeast Fisheries Science Center

机译：渔业声学调查在缅因州湾和地质峡谷的东北渔业科学中心

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Fisheries stock assessments by the Northeast Fisheries Science Center (NEFSC) have historically been based on data from commercial landings and fisheries-independent bottom trawl surveys. Underwater acoustic technology is presently being implemented by the NEFSC as an alternative approach to obtain independent abundance and biomass indices for pelagic fish species in the Gulf of Maine and Georges Bank regions of the Northwest Atlantic. During 1995-1997, acoustic cruises were conducted to evaluate a multiple-frequency Simrad EK500 scientific echosounder (12 kHz single beam, and 38 and 120 kHz split beams), midwater trawls, and underwater video. Beginning in 1998, acoustic surveys of Atlantic herring (Clupea harengus) have been conducted to provide abundance and biomass estimates. Midwater trawl gear and underwater video have been used to verify species composition of acoustic backscattering. Distributions of Atlantic herring during fall surveys are spatially and temporally heterogeneous which confounds estimates of abundance and biomass. Integration of acoustic data with oceanographic and biological databases at the NEFSC significantly enhances the utility of fisheries acoustic methods for pelagic fish assessment.
机译：东北渔业科学中心（NEFSC）的渔业股票评估历来基于商业着陆和渔业独立底拖网调查的数据。目前，NEFSC作为替代方法，以获得缅因州湾和乔治峡谷地区的河口峡谷地区的独立丰富和生物量指标的替代方法。在1995 - 1997年期间，进行了声学巡航，以评估多频Simrad EK500科学回声（12 kHz单梁和38和120 kHz分离梁），跨拖网和水下视频。从1998年开始，已经进行了大西洋鲱鱼（Clupea Herengus）的声学调查，以提供丰富和生物量估计。跨越拖网和水下视频已被用于验证物种的声学反向散射的组成。在秋季调查期间的大西洋鲱鱼的分布在空间和时间上异质，这困扰了丰富和生物质的估计。 NEFSC与海洋和生物数据库的声学数据集成显着提高了渔业声学方法的储蓄对皮鱼评估的效用。

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