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Optimization of fishery resources assessment methods and ecological effects evaluation of artificial reefs

文献类型： 外文期刊

作者： Zeng, Lei 1 ; Tang, Zhenzhao 1 ; Chen, Pimao 1 ; Yu, Jie 1 ; Chen, Guobao 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Peoples R China

3.Minist Agr, South China Sea Fishery Resources & Environm, Sci Observing & Expt Stn, Guangzhou 510300, Peoples R China

4.Chinese Acad Fishery Sci, Key Lab Marine Ranch Technol, Guangzhou 510300, Peoples R China

关键词： Acoustic detection; bottom trawl; fishery resources

期刊名称：MARINE BIOLOGY RESEARCH （ 影响因子：1.298； 五年影响因子：1.308 ）

ISSN： 1745-1000

年卷期： 2021 年 17 卷 1 期

页码：

收录情况： SCI

摘要： The dynamics of fishery resources were analysed and compared before and after artificial reefs were deployed in the Dongshan Sea of Huizhou, Guangdong Province, China based on acoustic detection and trawl sampling methods. Species assessed by acoustic detection were mainly distributed in the middle water layers, and those collected by trawl sampling were mainly benthic organisms. Therefore, it was necessary to integrate the two methods aimed at organisms living in different water layers to improve the reliability of the assessment results. The comprehensive assessment results showed that the densities of fishery resources on artificial reefs and in the surrounding waters after the reefs were deployed were 58,302inds/km(2) and 69658inds/km(2), which were overall higher than that (60159inds/km(2)) before artificial reef deployment. Some species, such as Parargyrops edita, usually hide inside the artificial reefs and cannot be detected or caught after the artificial reef deployment, which leads to a lower density being recorded than before artificial reef deployment. Furthermore, according to the results of single echo detection and nautical area backscattering coefficient analysis, the proportion of large- and medium-sized marine organisms increased after artificial reefs were deployed, and these organisms were mainly distributed in middle and deeper water layers. These observations indicated that the construction of artificial reefs could provide sufficient conditions for the growth of marine organisms and induce the large- and medium-sized individuals to deeper water layers.

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