| 底拖网作业对珠江口香港海域底层鱼类的影响 |
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| 引用本文： | 孙颉,彭俊豪,谭振耀,陈金满,佘书生,刘敏.底拖网作业对珠江口香港海域底层鱼类的影响[J].广东海洋大学学报,2020(1):64-68. |
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| 作者姓名： | 孙颉 彭俊豪 谭振耀 陈金满 佘书生 刘敏 |
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| 作者单位： | ;1.中港生态顾问有限公司;2.厦门大学海洋与地球学院 |
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| 摘 要： | 【目的】研究底拖网作业对珠江口香港海域底层鱼类的影响。【方法】根据2007-2009年及2014-2016年在珠江口香港海域进行的定点底拖网调查数据,分析该海域在禁止底拖网捕捞实施前后鱼类种类组成及生物量和生态多样性指数,评估5种典型底层鱼类资源的变化。【结果与结论】该海域捕获鱼类种类数在禁止底拖网作业后明显增加,鱼类种类数量从44种升至73种。种类丰富度指数D变化范围为:2007至2009年,4.937~5.711,2014至2016年,6.559~7.074;多样性指数H'变化范围为:2007至2009年,1.945~2.841,2014至2016年,2.220~2.381;均匀度指数J变化范围为:2007至2009年,0.539~0.776,2014至2016年,0.557~0.600。卵鳎Solea ovata、韦式羊舌鮃Arnoglossus waitei、尖嘴魟Dasyatis zugei这3种底层鱼类禁止底拖网实施后在数量(number)和生物量(biomass)上都增幅明显。不同站位数量和生物量的数值在“禁拖令”实施后也都有所增加,其中以站位2(大屿山以北,较靠近香港国际机场海域)增加最为显著。
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| 关 键 词： | 底拖网作业 底层鱼类 香港水域 珠江口 |
Impact of Trawling on Demersal Fishery Resources of the Pearl River Estuary Near Hong Kong Waters |
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| SUN Jie,PENG Jun-hao,TAN Zhen-yao,CHEN Jin-man,SHE Shu-sheng,LIU Min.Impact of Trawling on Demersal Fishery Resources of the Pearl River Estuary Near Hong Kong Waters[J].Journal of Zhanjiang Ocean University,2020(1):64-68. |
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| Authors: | SUN Jie PENG Jun-hao TAN Zhen-yao CHEN Jin-man SHE Shu-sheng LIU Min |
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| Institution: | (China Hong Kong Ecology Consultant Company,Hong Kong,China;College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China) |
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| Abstract: | 【Objective】Study the impact of trawling on the demersal fishery resources of the Pearl River Estuary near Hong Kong waters.【Method】This paper analyzed the fish species diversity,and their abundance and biomass,and evaluated the changes of resources of five demersal fishes prior(2007-2009)and after(2014-2016)the trawling ban.【Result】The average number of fish species increased largely from 44 to 73,prior to after the implementation of trawling ban.The richness index was from 4.937 to 5.711 in 2007-2009,and from 6.559 to 7.074 in 2014-2016.The diversity index was from 1.945 to 2.841 in 2007-2009,and from 2.220 to 2.381 in 2014-2016.Besides,the evenness index was from 0.539 to 0.776 in 2007-2009,and from 0.557 to 0.600 in 2014-2016.The number and biomass of Solea ovata,Arnoglossus waitei and Dasyatis zugei changed in a wide range from 2014 to 2016.At different survey stations,the number and biomass also increased obviously,especially station 2 which located on the north of Lantau Island and near the Hong Kong International Airport【Conclusion】The results from the present study indicated that there were partially effect on growth performance of fishery resources after the trawling ban conducted. |
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| Keywords: | bottom trawl survey demersal fishery Hong Kong Waters the Pearl River Estuary |
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