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海州湾日本枪乌贼和短蛸空间结构的季节变化
引用本文:都煜,徐宾铎,薛莹,纪毓鹏,任一平,张崇良.海州湾日本枪乌贼和短蛸空间结构的季节变化[J].水产学报,2017,41(12):1888-1895.
作者姓名:都煜  徐宾铎  薛莹  纪毓鹏  任一平  张崇良
作者单位:中国海洋大学水产学院,山东 青岛,266003
基金项目:海洋公益性行业科研专项(201305030);青岛海洋科学与技术国家实验室鳌山科技创新计划(2015ASKJ02-05)
摘    要:日本枪乌贼和短蛸是头足类中重要的经济种类,一般为一年生,其空间分布受季节变化的影响较大。由于受调查时间的限制,鲜有在该方面的研究报道。本研究根据2011年春季(5月)、秋季(9月)和冬季(12月)在海州湾及邻近海域进行的渔业资源底拖网调查数据,运用全局空间自相关、热点分析以及变异函数等方法分析了日本枪乌贼和短蛸的空间结构的季节性变化。研究表明:(1)日本枪乌贼和短蛸全局空间自相关性不强,存在局部空间热点,变异函数分析结果与全局空间自相关结果基本一致。(2)日本枪乌贼和短蛸空间自相关的尺度存在季节变化,两个物种均表现为在春季的空间结构性较强,而在秋、冬季的空间结构性较弱,春季的空间自相关性程度高于秋、冬季。(3)在春季,二者均在35.0°~35.5°N、120.0°~121.0°E海域存在一个空间热点,在资源密度最高的季节时其空间分布呈现出随机性特征。物种的空间分布模式可能与环境的季节变化以及其洄游分布和摄食习性相关。本研究有利于深入了解日本枪乌贼和短蛸的生活史特性及其栖息地,可为该资源的合理利用和保护以及后续研究提供理论参考。

关 键 词:日本枪乌贼  短蛸  空间结构  全局自相关性  空间热点  海州湾
收稿时间:2016/12/7 0:00:00
修稿时间:2017/4/11 0:00:00

Seasonal variations of spatial structure of Japanese squid (Loligo japonica) and octopus (Octopus ochellatus) in Haizhou Bay
DU Yu,XU Binduo,XUE Ying,JI Yupeng,REN Yiping and ZHANG Chongliang.Seasonal variations of spatial structure of Japanese squid (Loligo japonica) and octopus (Octopus ochellatus) in Haizhou Bay[J].Journal of Fisheries of China,2017,41(12):1888-1895.
Authors:DU Yu  XU Binduo  XUE Ying  JI Yupeng  REN Yiping and ZHANG Chongliang
Institution:College of Fisheries, Ocean University of China, Qingdao 266003, China,College of Fisheries, Ocean University of China, Qingdao 266003, China,College of Fisheries, Ocean University of China, Qingdao 266003, China,College of Fisheries, Ocean University of China, Qingdao 266003, China,College of Fisheries, Ocean University of China, Qingdao 266003, China and College of Fisheries, Ocean University of China, Qingdao 266003, China
Abstract:The cephalopod species, Japanese squid (Loligo japonica) and octopus (Octopus ochellatus) have important ecological and economic values in Haizhou Bay and adjacent waters. Japanese squid and octopus both spawn and nurse in the bay in early spring, and start overwintering migration from autumn. Their spatial structures vary substantially among seasons, driven by the seasonal variations of environmental changes and the monsoon climate. Studies of seasonal variations of their spatial structure contribute to understanding the distributional pattern and life-history of the two species. The spatial autocorrelation of sampling data has long been overlooked in the past. Besides, as most studies are limited by the scale of sampling time and spatial locations, the seasonal variations of spatial structure has been less studied. According to the survey data collected in spring (May), autumn (September) and winter (December) of 2011 using bottom trawls in Haizhou Bay and adjacent waters, we used multiple spatial analyses methods, including the global spatial autocorrelation, local spatial hot spots and semivariogram to examine the seasonal variations in the spatial structure of Japanese squid and octopus distribution. Our results show that the global spatial autocorrelation was weak for the two species, whereas there were strong local spatial aggregation distributions. The semivariogram analysis was consistent with global and local spatial autocorrelation, showing that the scale of spatial autocorrelation had seasonal changes of two species. The spatial structure of the two species was strong in spring and relatively weak in autumn and winter, and spatial autocorrelation in spring is more significant than that in autumn and winter. Both species showed a hot spot in the sea of 35.0°-35.5°N, 120.0°-121.0°E in spring, and there were non-cold spots area in the whole year. The spatial distribution showed non-aggregation or random pattern in the season when there was highest biomass density. The spatial distribution patterns of the two species may be related to seasonal environment changes as well as their feeding habits and the spawning and overwintering migration. This study contributes to a better understanding of the life-history traits and the distribution of suitable habitat for cephalopoda. The study provides research basis for scientific exploitation and management of the two species, which may benefit marine resources conservation and following studies.
Keywords:Loligo japonica  Octopus ochellatus  spatial structure  global spatial autocorrelation  spatial hot spot  Haizhou Bay
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