摘要
为探究海洋净初级生产力(NPP)与茎柔鱼(Dosidicus gigas)资源分布的关联,为茎柔鱼资源的合理开发利用提供科学依据,根据上海海洋大学鱿钓科学技术组提供的2006—2015年茎柔鱼鱿钓数据以及卫星遥感获得的NPP数据,探究了NPP与东南太平洋秘鲁外海茎柔鱼资源变动的关系,同时进一步评估了在异常气候条件下(厄尔尼诺事件与拉尼娜事件)NPP变动对茎柔鱼资源时空分布的影响。结果发现,茎柔鱼单位捕捞努力量渔获量(CPUE,t·d-1)、渔场纬度重心(LATG)、NPP及其空间分布均具有较为显著的月间变化。7—12月各月茎柔鱼适宜NPP范围分别为500~600 mgC·(m^2·d)^-1、500~600 mgC·(m^2·d)^-1、600~900 mgC·(m^2·d)^-1、600~900 mgC·(m^2·d)^-1、700~900 mgC·(m^2·d)^-1、600~900 mgC·(m^2·d)^-1,各月最适宜NPP值分别为500 mgC·(m^2·d)^-1、500 mgC·(m^2·d)^-1、600 mgC·(m^2·d)^-1、900 mgC·(m^2·d)^-1、800 mgC·(m^2·d)^-1、700 mgC·(m^2·d)^-1。同时,茎柔鱼CPUE与各月渔场平均NPP以及最适宜NPP范围比例均呈显著正相关(P<0.05),而LATG南北偏移的变动趋势也与各月最适NPP平均纬度变化基本一致。此外,茎柔鱼渔场内的NPP在2010年拉尼娜年的值要高于2009年厄尔尼诺年,从而也导致在拉尼娜年份的CPUE值较高。研究表明,海洋净初级生产力对东南太平洋秘鲁外海海域茎柔鱼的资源丰度及空间分布具有显著调控作用。
Ocean net primary production(NPP),an important factor of nutrition index in marine food chain,can have significant impacts on the potential distribution of cephalopod resources.Based on fisheries data obtained from the Chinese Squid-jigging Science and Technology Group of Shanghai Ocean University and remote sensing NPP data during 2006—2015,this paper evaluated the effects of NPP on the spatial and temporal variations of Dosidicus gigas stock under abnormal conditions(El Nino and La Nina events).Results showed that the CPUE(catch per unit effort)of D.gigas,LATG(latitudinal gravity centers of fishing ground),NPP and its spatial distribution significantly changed from month to month.From July to December,the suitable range of NPP was 500-600 mgC·(m^2·d)^-1 in July,500-600 mgC·(m^2·d)^-1 in August,600-900 mgC·(m^2·d)^-1 in September,600-900 mgC·(m^2·d)^-1 in October,700-900 mgC·(m^2·d)^-1 in November,600-900 mgC·(m^2·d)^-1 in December.The most suitable NPP for each month was 500 mgC·(m^2·d)^-1,500 mgC·(m^2·d)^-1,600 mgC·(m^2·d)^-1,900 mgC·(m^2·d)^-1,800 mgC·(m^2·d)^-1,700 mgC·(m^2·d)^-1,respectively.In addition,a significantly positive correlation was found between CPUE and the average NPP of the fishing ground(P<0.05),and the proportion of CPUE was also positively correlated with the most suitable NPP range for each month(P<0.05).The change trend of monthly LATG was basically consistent with the average latitude of the most suitable NPP in each month.Under abnormal environmental conditions,the NPP in 2010 with a La Nina event was higher than that in 2009 with an El Ni?o event,leading to higher CPUE values in the La Nina year.This study suggests that the NPP can strongly affect the abundance and spatial distribution of D.gigas in the Peruvian waters in the Southeast Pacific Ocean.
作者
李婷
赵嵩玲
田园园
余为
LI Ting;ZHAO Songling;TIAN Yuanyuan;YU Wei(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Oceanic Fisheries Exploration,Ministry of Agriculture and Rural Affairs,Scientific Observing and Experimental Station of Oceanic Fishery Resources,Ministry of Agriculture and Rural Affairs,Shanghai 20306,China)
出处
《海洋渔业》
CSCD
北大核心
2020年第5期513-523,共11页
Marine Fisheries
基金
国家重点研发计划(2019YFD0901405)
国家自然科学基金青年科学基金(41906073)
上海市自然科学基金(19ZR1423000)。
关键词
茎柔鱼
海洋净初级生产力
资源丰度
异常环境
东南太平洋
Dosidicus gigas
net primary production
abundance
anomalous environments
Southeast Pacific Ocean
作者简介
李婷(2000—),安徽阜阳人,研究方向为渔业海洋学。E-mail:lt1869238@163.com;通信作者:余为,讲师。E-mail:wyu@shou.edu.cn。
