| 东太平洋大眼金枪鱼自由鱼群栖息地偏好的时空分布特征 |
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| 引用本文： | 黄金玲,戴黎斌,王学昉,周成,唐浩.东太平洋大眼金枪鱼自由鱼群栖息地偏好的时空分布特征[J].上海海洋大学学报,2020,29(6):889-898. |
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| 作者姓名： | 黄金玲 戴黎斌 王学昉 周成 唐浩 |
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| 作者单位： | 上海海洋大学海洋文化与法律学院,上海201306;上海海洋大学海洋科学学院,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教育部重点实验室,上海201306;农业农村部大洋渔业开发重点实验室,上海201306;农业农村部大洋渔业资源环境科学观测实验站,上海201306 |
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| 基金项目： | 国家自然科学基金项目（31902426，41806110）；上海市青年科技英才杨帆计划资助（19YF1419800）；中国博士后科学基金面上项目（2019M651475） |
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| 摘 要： | 摘 要：本研究基于美洲间热带金枪鱼委员会收集的2015-2017年东太平洋金枪鱼围网金枪鱼自由鱼群捕捞数据和相匹配的卫星遥感数据，使用二阶提升回归树模型(Boosted regression trees, BRTs)建立了该鱼群的栖息地，以探究其时空分布特征。研究结果表明，相对于环境因子，空间因子对大眼金枪鱼自由鱼群的丰度有更大的影响。环境因子方面，纬度、经度、混合层深度、月份和海表面温度是影响大眼金枪鱼捕捞成功概率的主要影响因子，而影响丰度的主要因子为经度和海表面叶绿素浓度。空间上，大眼金枪鱼主要处于10°S以南， 95°W以西的海域。在2016年7-9月和2017年2-4月中，BRTs模型预测的空间分布显示一些高度密集的自由鱼群分别栖息在远离海岸，经度为150°W，纬度为0°的赤道海域和经度为120°W，纬度为10°S附近的海域。时间序列上，大眼金枪鱼丰度月平均值的年际间变化差异很小，月间差异较大，在7月达到最高值，但在8月份立刻下降到最低值。本研究的结果可以为东太平洋大眼金枪鱼的资源养护和管理提供参考依据。
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| 关 键 词： | 金枪鱼围网 自由鱼群 栖息地 大眼金枪鱼 |
| 收稿时间： | 2019/12/10 0:00:00 |
| 修稿时间： | 2020/2/9 0:00:00 |
Spatio-temproal distribution pattern of habitat preference of bigeye tuna free-swimming schools in the eastern Pacific Ocean |
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| HUANG Jinling,DAI Libin,WANG Xuefang,ZHOU Cheng,TANG Hao.Spatio-temproal distribution pattern of habitat preference of bigeye tuna free-swimming schools in the eastern Pacific Ocean[J].Journal of Shanghai Ocean University,2020,29(6):889-898. |
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| Authors: | HUANG Jinling DAI Libin WANG Xuefang ZHOU Cheng TANG Hao |
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| Institution: | College of Marine Culture and law,Shanghai Ocean University,College of Marine Sciences,Shanghai Ocean University,College of Marine Sciences,Shanghai Ocean University,College of Marine Sciences,Shanghai Ocean University,College of Marine Sciences,Shanghai Ocean University |
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| Abstract: | Abstract: Based on the data collected by Inter-American Tropical Tuna Commission (IATTC) from 2015 to 2017 and the matched satellite remote sensing data, a two-stage boosted regression tree model was built to model the habitat of bigeye tuna free-swimming schools in the Eastern Pacific Ocean (EPO) and explore its temporal and spatial distribution pattern. The results show that, compared to environmental factors, spatial factors have a greater impact on the abundance of bigeye tuna free-swimming schools. In terms of environmental factors, latitude, longitude, mixed layer depth, month, and sea surface temperature are the main influential factors that affect the fishing success rate of bigeye tuna free-swimming schools, while the main factors affecting the abundance of bigeye tuna free-swimming schools are longitude and sea surface chlorophyll-a concentration. Bigeye tuna is mainly located in the sea area south of 10°S and west of 95°W. During July to September in 2016 and Febuary to April in 2017, the spatial distribution predicted by the two-stage BRTs model showed that some highly dense tuna free-swimming schools inhabited the equatorial waters with longitude of 150°W and latitude of 0° and waters with longitude of 120°W and latitude of 10°S, respectively. With respect to temporal trend, the inter-annual variation of the monthly average of the abundance of bigeye tuna is small, but the monthly difference is large. The monthly variation revealed that the highest value occurred in July and immediately dropped to the lowest value in August. The results of this study can provide reference for conservation and management of tuna resources in the EPO. |
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| Keywords: | tuna purse seine free-swimming school habitat bigeye tuna |
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