东南太平洋秘鲁海域光合有效辐射对茎柔鱼资源丰度和空间分布的影响研究

发布时间：2018-12-07 18:23

【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。
[Abstract]:Photosynthetic active radiation (PAR) is one of the important driving factors of marine primary productivity, so it has a potential effect on the abundance and spatial distribution of marine fish resources. Based on the fishing data and photosynthetic effective radiation satellite remote sensing data provided by China squid jigging science and technology group from January to December of 2006 to 2015, the abundance of resources was characterized by the catch of unit fishing effort (CPUE). The spatial distribution of fishing grounds was characterized by the latitude and gravity center of CPUE, and the effects of photosynthetic effective radiation on the resource changes of caecilops in the southeastern Pacific Ocean were evaluated. The results showed that the yield, fishing effort, CPUE and PAR of the fishing grounds showed obvious monthly changes, and the monthly variation of CPUE and PAR showed a tendency of decreasing in January-June and increasing in July-December. Correlation analysis showed that the correlation between CPUE and PAR was positive, July and August were significant, but the other months were not significant. According to the method of frequency distribution, the suitable and optimum PAR ranges of each month were estimated. There was a significant positive correlation between the ratio of the optimum PAR range to the total area of fishing ground and CPUE, and it was suggested that the abundance of mollusca resources might be determined by the appropriate PAR area in each month. At the same time, the optimum PAR latitude was significantly positively correlated with the CPUE latitude barycenter, indicating that the spatial distribution of the fishing ground was significantly affected by the optimum PAR latitude. In addition, the suitable PAR area in La Nina year was significantly higher than that in El Nino year. The results showed that the abundance and spatial distribution of the resources were significantly affected by the photosynthetic effective radiation, and the regulation of them showed different changes under different climatic conditions.
【作者单位】：上海海洋大学海洋科学学院;国家远洋渔业工程技术研究中心;大洋渔业资源可持续开发省部共建教育部重点实验室;远洋渔业协同创新中心;
【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)
【分类号】：S931.1

【相似文献】