Bioacoustic application on fisheries management in an artificial reefs' ecological reserve of Bohai Gulf China

文献类型： 外文期刊

第一作者： Zeng, Lei

作者： Zeng, Lei;Tang, Zhenzhao;Chen, Pimao;Chen, Guobao;Zeng, Lei;Tang, Zhenzhao;Chen, Pimao;Chen, Guobao;Zeng, Lei;Tang, Zhenzhao;Chen, Pimao;Chen, Guobao;Hou, Chunqiang

作者机构：

关键词： Artificial reefs; Acoustic survey; Ecological management; Fishery resources; Temporal-spatial distribution

期刊名称：ENVIRONMENTAL EARTH SCIENCES （ 影响因子：2.784； 五年影响因子：2.867 ）

ISSN： 1866-6280

年卷期： 2018 年 77 卷 21 期

页码：

收录情况： SCI

摘要： Various techniques have been used in marine fishery resources assessment. Among those, acoustic techniques have high efficiency and wide adaptability, and are environment friendly. Therefore, acoustic techniques played a key/indispensable role in the field of ecosystem-based fishery management. Acoustic surveys were conducted during the wet (May) and dry (November) seasons in 2016 in the artificial reefs ecological reserve of Bohai Gulf and a nearby control region to understand the current situation of fishery resources and explore the effectiveness of underwater artificial constructions by a dual-frequency identification sonar (DIDSON) and a scientific split-beam echosounder (120 KHz, Simrad EY60). Fish densities in various seasons and regions showed significant differences and interaction, with a maximum value of 358020.34 ind/n.mile(2) in the artificial reefs' region and a minimum value of 71898.35 ind/n.mile(2) in the control region during the wet season. Fish densities in defined parallel transects revealed a roughly southward migration trend of small-size individuals from wet season to dry season. Single echo detections in the artificial reefs region demonstrated a wider target strength (TS) range (-60 -30 dB vs -60 -51 dB) and higher mean TS values (-55.87 dB vs -58.31 dB) than the control region both in the wet and dry seasons, which indicated a more complicated and stable fish community structure in the artificial reefs area. The vertical distribution of single echo detections tracked by the echoview post-processing system showed an apparent downward gathering effect. A positive correlation between TS and water depth was discovered from Pearson correlation analysis in the artificial reefs region during the dry season.

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