摘要
柔鱼(Ommastrephes bartramii)是大洋性短生命周期物种,其生活史和生物量受环境和气候因子影响明显。基于2004—2015年西北太平洋柔鱼渔捞日志、海表面温度(Sea surface temperature,SST)、叶绿素(Chlorophyll a,Chl a)浓度及太平洋年代际震荡(Pacific decadal oscillation,PDO)数据,利用空间自相关统计方法、热点分析和小波分析法研究PDO冷期与暖期两种气候模态下西北太平洋柔鱼渔场的时空变化。结果表明,PDO指数(Pacific Decadal Oscillation Index,PDOI)与柔鱼单位捕捞努力量渔获量(Catch per unit effort,CPUE)呈正相关,且CPUE滞后PDO 8个月(R2=0.548,P<0.05),CPUE与PDO指数的共轭周期为2~4个月。不同气候模态下的渔场热点分布特征为,暖期时渔场重心向高纬方向分布较为明显,空间上的集聚性强;冷期时向低纬分布较为明显,空间上的集聚性相对较差。PDO冷暖时期对西北柔鱼时空分布影响显著,该研究对柔鱼资源的可持续开发具有一定的科学意义。
Ommastrephes bartramii is an oceanic species with short life cycle,whose life history and biomass are affected by environmental and climatic factors significantly.Based on the fishery data,sea surface temperature(SST),chlorophyll a(Chl a)and Pacific decadal oscillation(PDO)from 2004 to 2015 in the Northwest Pacific,we applied patial autocorrelation statistics,hot spot analysis and wavelet analysis to study the spatio-temporal variation of O.bartramii in that area under two PDO models with cold and warm periods.The results show that the PDO index was positively correlated with the catch per unit effort(CPUE)and the CPUE lagged PDO for eight months.However,the conjugate period was 2?4 months under the influence of CPUE and PDO index.The distribution of fishery hotspots under two PDO modes is characterized by the fact that the gravity centers of fishing ground is obviously distributed in high and low latitude direction with strong and weak spatial agglomeration in warm and cold periods,respectively.PDO index affects the spatio-temporal distribution of O.bartramii in different periods significantly,which has positive implications for the sustainable development of O.bartramii in the Northwest Pacific Ocean.
作者
李佳佳
汪金涛
陈新军
雷林
关长涛
LI Jiajia;WANG Jintao;CHEN Xinjun;LEI Lin;GUAN Changtao(College of Marine Sciences of Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Oceanic Fisheries Exploration,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Oceanic Fisheries/Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education/Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China;Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture and Rural Affairs,Qingdao 266071,China)
出处
《南方水产科学》
CAS
CSCD
北大核心
2020年第2期62-69,共8页
South China Fisheries Science
基金
国家重点研发计划项目(2019YFD0901404)
国家自然科学基金项目(NFSC31702343,NSFC41876141)。
关键词
柔鱼
太平洋年代际震荡
热点分析
小波分析
滞后性分析
Ommastrephes bartramii
Pacific decadal oscillation
Spatial hot point analysis
Wavelet analysis
Hysteresis analysis
