| GAO Qian,XU Zhaoli,HUANG Hongliang,CHEN Xuezhong,FENG Chunlei,LI Lingzhi. 2013. Geographical distribution and age composition of Euphausia superba larvae (Crustacea：Euphausiacea) in the South Shetland Islands region and southern Scotia Sea in relation to environmental conditions. Acta Oceanologica Sinica, 32(11):59－67 |
| Geographical distribution and age composition of Euphausia superba larvae (Crustacea：Euphausiacea) in the South Shetland Islands region and southern Scotia Sea in relation to environmental conditions |
| Geographical distribution and age composition of Euphausia superba larvae (Crustacea：Euphausiacea) in the South Shetland Islands region and southern Scotia Sea in relation to environmental conditions |
| Received:June 18, 2012 Revised:July 15, 2013 |
| DOI：10.1007/s13131-013-0377-2 |
| Key words:Southern Ocean Euphausia superba larvae distribution pattern |
| 中文关键词: Southern Ocean Euphausia superba larvae distribution pattern |
| 基金项目:Project on the exploration of fishery resources in the offshore supported by theMinistry of Agriculture (2010-2013);Chinese Polar Environment Comprehensive Investigation and Assessment Programes under contract No. CHINARE2012~2016-01-06. |
| Author Name | Affiliation | E-mail | | GAO Qian | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | | | XU Zhaoli | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | | | HUANG Hongliang | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | | | CHEN Xuezhong | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | xuezhong@eastfishery.ac.cn | | FENG Chunlei | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | | | LI Lingzhi | Key and Open Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China | |
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| Abstract: |
| Spatial distribution patterns of the different life stages of Euphausia superba in the region of the South Shetland Islands and southern Scotia Sea (Antarctica) were assessed based on scientific survey data collected in January and February of 2010. Adults, eggs, nauplii, metanauplii, calyptopis Ⅰ-Ⅲ, and furcilia Ⅰ-Ⅱ were found in the investigation. The abundance of larvae averaged 1 172.8 ind./m2, with calyptopis Ⅰ and Ⅱ as the dominant stages. Habitat occupancy patterns varied among Euphausia superba at different stages, and three sub-regionswere identified by cluster analysis. The degree of larval development increased fromwest to east. Larvae were not observed north of the South Shetland Islands. Calyptopis I was predominant in the water between Elephant Island and the South Orkney Islands, which featured no thermocline. Older stages, including calyptopis Ⅱ and Ⅲ and furcilia Ⅰ and Ⅱ, were common in north and northeast of the South Orkney Islands, which were characterized by high temperature and high chlorophyll concentration. Distribution and abundance of the early life stages of E. superba were associatedwith specific environmental conditions. According to Biota-Environment matching (BIOENV), the distributions of E. superba larvae were correlated with a combination of temperature at the surface and 200m, and 0-100 mintegrated chlorophyll a concentration. |
| 中文摘要: |
| Spatial distribution patterns of the different life stages of Euphausia superba in the region of the South Shetland Islands and southern Scotia Sea (Antarctica) were assessed based on scientific survey data collected in January and February of 2010. Adults, eggs, nauplii, metanauplii, calyptopis Ⅰ-Ⅲ, and furcilia Ⅰ-Ⅱ were found in the investigation. The abundance of larvae averaged 1 172.8 ind./m2, with calyptopis Ⅰ and Ⅱ as the dominant stages. Habitat occupancy patterns varied among Euphausia superba at different stages, and three sub-regionswere identified by cluster analysis. The degree of larval development increased fromwest to east. Larvae were not observed north of the South Shetland Islands. Calyptopis I was predominant in the water between Elephant Island and the South Orkney Islands, which featured no thermocline. Older stages, including calyptopis Ⅱ and Ⅲ and furcilia Ⅰ and Ⅱ, were common in north and northeast of the South Orkney Islands, which were characterized by high temperature and high chlorophyll concentration. Distribution and abundance of the early life stages of E. superba were associatedwith specific environmental conditions. According to Biota-Environment matching (BIOENV), the distributions of E. superba larvae were correlated with a combination of temperature at the surface and 200m, and 0-100 mintegrated chlorophyll a concentration. |
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