文献类型： 外文期刊

作者： Krafft, Bjorn A. ¹ ; Macaulay, Gavin J. ¹ ; Skaret, Georg ¹ ; Knutsen, Tor ¹ ; Bergstad, Odd A. ¹ ; Lowther, Andrew ² ; Huse, Geir ¹ ; Fielding, Sophie ³ ; Trathan, Philip ³ ; Murphy, Eugene ³ ; Choi, Seok-Gwan ⁴ ; Chung, Sangdeok ⁴ ; Han, Inwoo ⁴ ; Lee, Kyounghoon ⁵ ; Zhao, Xianyong ⁶ ; Wang, Xinliang ⁶ ; Ying, Yiping ⁶ ; Yu, Xiaotao ⁶ ; Demianenko, Kostiantyn ⁷ ; Podhornyi, Viktor ⁷ ; Vishnyakova, Karina ⁸ ; Pshenichnov, Leonid ⁷ ; Chuklin, Andrii ⁹ ; Shyshman, Hanna ⁹ ; Cox, Martin J. ¹⁰ ; Reid, Keith ¹¹ ; Watters, George M. ¹² ; Reiss, Christian S. ¹² ; Hinke, Jefferson T. ¹² ; Arata, Javier ¹³ ; Godo, Olav R. ¹⁴ ; Hoem, Nils ¹⁴ ;

作者机构： 1.Inst Marine Res, N-5005 Bergen, Norway

2.Norwegian Polar Res Inst, N-9296 Tromso, Norway

3.British Antarctic Survey, Cambridge CB3 0ET, England

4.Natl Inst Fisheries Sci, Busan 46083, South Korea

5.Chonnam Natl Univ, Yeosu 59626, South Korea

6.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

7.Inst Fisheries & Marine Ecol, UA-71118 Berdyansk, Ukraine

8.Natl Antarctic Sci Ctr Ukraine, UA-01601 Kiev, Ukraine

9.Ltd Liabil Co IKF, UA-54017 Mykolaiv, Ukraine

10.Australian Antarctic Div, Hobart, Tas 7050, Australia

11.CCAMLR, Hobart, Tas 7002, Australia

12.NOAA, Antarctic Ecosyst Res Div, Southwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, La Jolla, CA 92037 USA

13.Assoc Responsible Krill Harvesting Co ARK, Margate, Qld 7054, Australia

14.AKER Biomarine AS, N-1366 Lysaker, Norway

关键词： acoustic survey; biomass; climate; ecosystem change; fishery management; global climate change; zooplankton

期刊名称：JOURNAL OF CRUSTACEAN BIOLOGY （ 影响因子：1.29； 五年影响因子：1.455 ）

ISSN： 0278-0372

年卷期： 2021 年 41 卷 3 期

页码：

收录情况： SCI

摘要： Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean and across the Scotia Sea in 2018-19, the '2018-19 Area 48 Survey'. Survey vessels were provided by Norway, the Association of Responsible Krill harvesting companies and Aker BioMarine AS, the United Kingdom, Ukraine, Republic of Korea, and China. Survey design followed the transects of the Commission for the Conservation of Antarctic Marine Living Resources synoptic survey, carried out in 2000 and from regular national surveys performed in the South Atlantic sector by the U.S., China, Republic of Korea, Norway, and the U.K. The 2018-19 Area 48 Survey represents only the second large-scale survey performed in the area and this joint effort resulted in the largest ever total transect line (19,500 km) coverage carried out as one single exercise in the Southern Ocean. We delineated and integrated acoustic backscatter arising from krill swarms to produce distribution maps of krill areal biomass density and standing stock (biomass) estimates. Krill standing stock for the Area 48 was estimated to be 62.6 megatonnes (mean density of 30 g m(-)(2) over 2 million km(2)) with a sampling coefficient variation of 13%. The highest mean krill densities were found in the South Orkney Islands stratum (93.2 g m(-2)) and the lowest in the South Georgia Island stratum (6.4 g m(-2)). The krill densities across the strata compared to those found during the previous survey indicate some regional differences in distribution and biomass. It is currently not possible to assign any such differences or lack of differences between the two survey datasets to longer term trends in the environment, krill stocks or fishing pressure.