摘要
光合有效辐射(PAR)是海洋初级生产力的重要驱动因素之一,因此对海洋鱼类的资源丰度和空间分布产生潜在影响。本文根据2006-2015年1-12月中国鱿钓科学技术组提供的秘鲁外海茎柔鱼捕捞数据和光合有效辐射卫星遥感数据,以单位捕捞努力量渔获量(CPUE)表征资源丰度,以CPUE的纬度重心表征渔场空间分布,评估了东南太平洋秘鲁海域光合有效辐射对茎柔鱼资源变动的影响。结果发现,茎柔鱼渔场的产量、捕捞努力量、CPUE和PAR呈现明显的月间变化,其中CPUE和PAR月间变化规律表现为1-6月降低,7-12月增加的趋势。相关分析法表明,CPUE与PAR呈正相关关系,7月和8月相关性显著,而其余月份相关性不显著。依据频率分布法估算了各月适宜和最适PAR范围,各月最适PAR范围占渔场总面积比例与CPUE呈显著正相关关系,推测茎柔鱼资源丰度可能由各月适宜PAR面积大小决定;同时,最适PAR纬度与CPUE纬度重心呈显著正相关,说明茎柔鱼渔场的空间分布受最适PAR纬度的显著影响。此外,拉尼娜年份茎柔鱼适宜PAR面积要显著高于厄尔尼诺年份。研究表明,茎柔鱼资源丰度和空间分布受光合有效辐射的显著影响,其调控作用在不同气候条件下呈现不同的变化规律。
The photosynthetically active radiation（PAR）is one of the most important factors driving the variations in ocean primary productivity,implying that the PAR may have potential influence on the abundance and spatial distribution of pelagic fish species.In this study,the catch per unit effort（CPUE）and the latitudinal gravity center（LATG）of CPUE was used to indicate the squid abundance and spatial distribution of fishing ground,respectively,we evaluated the influence of PAR on stock variation of jumbo flying squid Dosidicus gigas in the Southeast Pacific Ocean off Peru,based on the fishery data during 2006-2015 obtained from the Chinese squid-jigging Science and Technology Group as well as the remotely satellite data.The results indicated that the catch,fishing effort,CPUE and PAR exhibited significant monthly variations.The CPUE and PAR showed the similar trend,decreasing from January to June and increasing from July to December.The correlation analysis suggested that positive relationship was found between the CPUE and the PAR.However,the correlation was significant in July and August,but was not significant in other months.Based on the histogram analysis,the monthly suitable and the most preferred PAR for Dosidicus gigas were evaluated.Significantly positive relationship was found between the monthly percentages of suitable PAR accounting for the fishing ground and the CPUE over 2006-2015,suggesting that the abundance of Dosidicus gigas off Peruvian waters was determined by the monthly suitable PAR area.Meanwhile,the latitudinal gravity center of CPUE was positively related to the mean latitude of the most preferred PAR,indicating that the locations of fishing ground of Dosidicus gigas were strongly affected by the latitudinal distribution of the most favorable PAR.Furthermore,the suitable PAR area in La Ni？a years was much larger than that in El Ni？o years.Our findings suggested that the abundance and spatial distribution of Dosidicus gigas in the Southeast Pacific Ocean off Peru were significantl
出处
《海洋学报》
CAS
CSCD
北大核心
2017年第11期97-105,共9页
基金
中国博士后基金面上项目(2017M611612)
上海海洋大学博士科研启动基金(A2-0203-17-100313)
大洋渔业资源可持续发展重点实验室开放基金(A1-0203-00-2009-5)
关键词
茎柔鱼
光合有效辐射
资源丰度
空间分布
厄尔尼诺和拉尼娜事件
东南太平洋
Dosidicus gigas
photosynthetically active radiation
abundance
spatial distribution
El Nino and LaNina events
the Southeast Pacific Ocean
