文章摘要
南海北部海域大眼鲷资源的时空异质性
Spatiotemporal heterogeneity of Priacanthus spp. resources in the northern South China Sea
投稿时间:2019-01-29  修订日期:2019-04-29
DOI:
中文关键词: 大眼鲷  时空异质性  空间自相关  南海北部  底拖网
英文关键词: Priacanthus spp  spatiotemporal heterogeneity  spatial autocorrelation  the northern South China Sea  bottom trawl
基金项目:公益性行业科研专项经费项目(201403008); 农业部财政项目“南海海洋捕捞生产结构调查”(640)
作者单位E-mail
刘禹希 广东海洋大学 水产学院 916942526@qq.com 
王学锋 广东海洋大学 水产学院 xuefeng1999@126.com 
陈国宝 中国水产科学研究院南海水产研究所  
吕少梁 广东海洋大学 水产学院  
曾嘉维 广东海洋大学 水产学院  
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中文摘要:
      研究经济鱼类的资源密度重心及其时空异质性有助于深入了解其渔场形成过程,并为其渔业资源的可持续利用和科学管理提供参考依据。本文基于2009~2014年南海捕捞信息网络中的南海北部海域底拖网渔业生产数据,运用重心分布、自举法(Bootstrap)和地统计等方法研究了大眼鲷(Priacanthus spp.)资源密度重心分布和时空异质性。结果表明,2009~2014年大眼鲷资源密度总体上呈逐年降低的趋势,且差异极显著(P<0.01),最高值为2012年的(26.69±7.34) g/h/kW/nets。不同年份大眼鲷资源密度重心均分布在南海北部50~100 m等深线间,资源密度重心年际分布差异不显著(P>0.05),主要集中于调查海域中部。大眼鲷资源密度在70~90 km的尺度范围内呈强烈的空间自相关格局及良好的空间结构性(块金系数<25%),主要受环境因素的作用;在90 km以上的尺度范围,空间自相关性较弱,受随机成分影响较大。
英文摘要:
      It’s helpful to know the formation of fishing grounds by the center of gravity of fish resource density and temporal and spatial heterogeneity. The traditional economic fish resources are declining owing to the impact of over fishing, environmental change and other factors. Priacanthus spp., the main catches in bottom trawls in the South China Sea, are important in ecological. But few studies of their spatial-temporal patterns of distribution are available, and spatial autocorrelation of data is often lacking in the studies. Analysis of temporal and spatial heterogeneity in the distribution of Priacanthus spp. in the northern South China Sea has significance for sustainable development and rational management of the fishery. To study this, we used the data of bottom trawl fishery in the northern South China Sea by a fishery information network from 2009 to 2014, for spatial analysis of center of gravity and semivariogram plots to investigate temporal and spatial distribution of Priacanthus spp. resource density. The results showed that the resource density of Priacanthus spp. was a gradually decreasing trend and the differences were extremely significant (P<0.01) from 2009 to 2014. The maximum value of resource density was (26.69±7.34) g/h/kW/nets in 2012. The center of gravity of the resource density distributed between the 50-m and 100-m isobath in the middle part of the survey area, and the differences were not significant (P>0.05). The spatial distribution of Priacanthus spp. in the survey area displayed a well-organized structure, with strong spatial autocorrelation in 70–90 km. Spatial heterogeneity in resource density of Priacanthus spp. appeared to be caused less by randomness than by structural variations. The spatial distribution of Priacanthus spp. displayed weak spatial autocorrelation when the distance exceeded 90 km.
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