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西北太平洋环境变化对柔鱼冬春生群体资源丰度年间变化的影响
引用本文:余为,陈新军,陈长胜,张瑜.西北太平洋环境变化对柔鱼冬春生群体资源丰度年间变化的影响[J].海洋学报(英文版),2017,36(10):48-59.
作者姓名:余为  陈新军  陈长胜  张瑜
作者单位:上海海洋大学海洋科学学院, 上海 201306;国家远洋渔业工程技术研究中心, 上海 201306;大洋渔业资源可持续开发省部共建教育部重点实验室, 上海 201306;远洋渔业协同创新中心, 上海 201306,上海海洋大学海洋科学学院, 上海 201306;国家远洋渔业工程技术研究中心, 上海 201306;大洋渔业资源可持续开发省部共建教育部重点实验室, 上海 201306;远洋渔业协同创新中心, 上海 201306,马萨诸塞州立大学达特茅斯分校海洋科学学院, 新贝德福德 02744,上海海洋大学海洋科学学院, 上海 201306
摘    要:The neon flying squid Ommastrephes bartramii is an economically important species in the Northwest Pacific Ocean. The life cycle of O. bartramii is highly susceptible to climatic and oceanic factors. In this study, we have examined the impacts of climate variability and local biophysical environments on the interannual variability of the abundance of the western winter-spring cohort of O. bartramii over the period of 1995–2011. The results showed that the squid had experienced alternant positive and negative Pacific Decadal Oscillation(PDO) over the past 17 years during which five El Ni?o and eight La Ni?a events occurred. The catch per unit effort(CPUE) was positively correlated with the PDO index(PDOI) at a one-year time lag. An abnormally warm temperature during the La Ni?a years over the positive PDO phase provided favorable oceanographic conditions for the habitats of O.bartramii, whereas a lower temperature on the fishing ground during the El Ni?o years over the negative PDO phase generally corresponded to a low CPUE. The same correlation was also found between CPUE and Chl a concentration anomaly. A possible explanation was proposed that the CPUE was likely related to the climateinduced variability of the large-scale circulation in the Northwest Pacific Ocean: high squid abundance often occurred in a year with a significant northward meander of the Kuroshio Current. The Kuroshio Current advected the warmer and food-rich waters into the fishing ground, and multiple meso-scale eddies arising from current instability enhanced the food retention on the fishing ground, all of which were favorable for the life stage development of the western squid stocks. Our results help better understand the potential process that the climatic and oceanographic factors affect the abundance of the winter-spring cohort of O. bartramii in the Northwest Pacific Ocean.

关 键 词:柔鱼  资源丰度  年间变化  PDO-CPUE关联  黑潮摆动  中尺度涡
收稿时间:2016/6/12 0:00:00

Impacts of oceanographic factors on interannual variability of the winter-spring cohort of neon flying squid abundance in the Northwest Pacific Ocean
YU Wei,CHEN Xinjun,CHEN Changsheng and ZHANG Yu.Impacts of oceanographic factors on interannual variability of the winter-spring cohort of neon flying squid abundance in the Northwest Pacific Ocean[J].Acta Oceanologica Sinica,2017,36(10):48-59.
Authors:YU Wei  CHEN Xinjun  CHEN Changsheng and ZHANG Yu
Affiliation: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 of Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China,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 of Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China,School for Marine Science and Technology, University of Massachusetts Dartmouth, New Bedford, MA 02744, USA and College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
Abstract:The neon flying squid Ommastrephes bartramii is an economically important species in the Northwest Pacific Ocean. The life cycle of O. bartramii is highly susceptible to climatic and oceanic factors. In this study, we have examined the impacts of climate variability and local biophysical environments on the interannual variability of the abundance of the western winter-spring cohort of O. bartramii over the period of 1995-2011. The results showed that the squid had experienced alternant positive and negative Pacific Decadal Oscillation (PDO) over the past 17 years during which five El Niño and eight La Niña events occurred. The catch per unit effort (CPUE) was positively correlated with the PDO index (PDOI) at a one-year time lag. An abnormally warm temperature during the La Niña years over the positive PDO phase provided favorable oceanographic conditions for the habitats of O. bartramii, whereas a lower temperature on the fishing ground during the El Niño years over the negative PDO phase generally corresponded to a low CPUE. The same correlation was also found between CPUE and Chl a concentration anomaly. A possible explanation was proposed that the CPUE was likely related to the climate-induced variability of the large-scale circulation in the Northwest Pacific Ocean:high squid abundance often occurred in a year with a significant northward meander of the Kuroshio Current. The Kuroshio Current advected the warmer and food-rich waters into the fishing ground, and multiple meso-scale eddies arising from current instability enhanced the food retention on the fishing ground, all of which were favorable for the life stage development of the western squid stocks. Our results help better understand the potential process that the climatic and oceanographic factors affect the abundance of the winter-spring cohort of O. bartramii in the Northwest Pacific Ocean.
Keywords:Ommastrephes bartramii  squid abundance  interannual variability  PDO-CPUE relationship  Kuroshio meandering  meso-scale eddies
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