| 黄海中部太平洋磷虾的大小组成和丰度分布的季节变化及其与环境因子的关系 |
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| 引用本文： | 左涛,Liu Hui.黄海中部太平洋磷虾的大小组成和丰度分布的季节变化及其与环境因子的关系[J].海洋学报(英文版),2019,38(2):70-77. |
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| 作者姓名： | 左涛 Liu Hui |
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| 作者单位： | 中国水产科学研究院黄海水产研究所 青岛 266071;青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室 青岛 266237,德克萨斯A&M大学加尔维斯顿分校海洋生物系加尔维斯顿 TX77553, 美国 |
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| 基金项目： | The NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No. U1606404; the National Natural Science Foundation of China under contract No. 40976103; the Ministry of Science and Technology of China under contract No. 2011CB403604. |
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| 摘 要： | The seasonal size structure and spatial abundance distributions of Euphausia pacifica populations were investigated in the central part of southern Yellow Sea from August 2009 to May 2010.The abundance and biomass of E.pacifica were higher in spring and summer,and lower in autumn and winter.The mean abundance and biomass(calculated by carbon)were 74.94 ind./m~3 and 8.23 mg/m~3,respectively.Females with total length(TL)ranging between 10 and 19 mm in summer had a substantial contribution to the population biomass,whereas larvae of TL of 3–7 mm in spring were the main contributor to the population abundance.The sex ratio(female:male)showed a female bias in four seasons.Its value peaked in summer,and then decreased in autumn,spring,and winter successively.Cohort analysis revealed that the length-frequency distribution of E.pacifica could be characterized as one group with large animals(mean TL12 mm)accompanied by one or two subgroups of small individuals(mean TL7 mm).Regarding the spatial distribution,juveniles and adults of E.pacifica tend to concentrate in relatively deep water with low temperature(～11℃)and high salinity(32),whereas its larvae showed more abundance in inshore water with rich chlorophyll a,low salinity(32),and warm temperature(11℃),especially in summer and autumn.Associations changed seasonally between stage-specific abundance and environmental factors.
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| 关 键 词： | 空间分布 大小组成 生物量 太平洋磷虾 黄海 |
| 收稿时间： | 2018/5/12 0:00:00 |
Seasonal size composition and abundance distribution of Euphausia pacifica in relation to environmental factors in the southern Yellow Sea |
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| Zuo Tao and Liu Hui.Seasonal size composition and abundance distribution of Euphausia pacifica in relation to environmental factors in the southern Yellow Sea[J].Acta Oceanologica Sinica,2019,38(2):70-77. |
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| Authors: | Zuo Tao and Liu Hui |
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| Institution: | 1.Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China;Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China2.Department of Marine Biology, Texas A & M University at Galveston, Galveston, TX 77553, USA |
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| Abstract: | The seasonal size structure and spatial abundance distributions of Euphausia pacifica populations were investigated in the central part of southern Yellow Sea from August 2009 to May 2010. The abundance and biomass of E. pacifica were higher in spring and summer, and lower in autumn and winter. The mean abundance and biomass (calculated by carbon) were 74.94 ind./m3 and 8.23 mg/m3, respectively. Females with total length (TL) ranging between 10 and 19 mm in summer had a substantial contribution to the population biomass, whereas larvae of TL of 3-7 mm in spring were the main contributor to the population abundance. The sex ratio (female:male) showed a female bias in four seasons. Its value peaked in summer, and then decreased in autumn, spring, and winter successively. Cohort analysis revealed that the length-frequency distribution of E. pacifica could be characterized as one group with large animals (mean TL>12 mm) accompanied by one or two subgroups of small individuals (mean TL<7 mm). Regarding the spatial distribution, juveniles and adults of E. pacifica tend to concentrate in relatively deep water with low temperature (~11℃) and high salinity (>32), whereas its larvae showed more abundance in inshore water with rich chlorophyll a, low salinity (<32), and warm temperature (>11℃), especially in summer and autumn. Associations changed seasonally between stage-specific abundance and environmental factors. |
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| Keywords: | spatial distribution size composition biomass Euphausia pacifica Yellow Sea |
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