Distribution and abundance of krill in various areas of the Southern Ocean:dataset compilation based on samples collected in CHINARE during 2009-2019OA
Distribution and abundance of krill in various areas of the Southern Ocean:dataset compilation based on samples collected in CHINARE during 2009-2019
This study investigates the composition,abundance,and basic biological parameters of krill in Prydz Bay,Antarctic Peninsula and Amundsen Sea by analyzing samples and environmental data from the Chinese National Antarctic Research Expeditions conducted between 2009/2010 and 2019/2020.The predominant krill species observed were Euphausia superba,Euphausia crystallorophias,and Thysanoessa macrura.T.macrura,although the most widespread,exhibited the lowest mean abundance(9.96 ind·(1000 m-3))and biomass(0.31 g·(1000 m-3)),predominantly found in low-latitude regions of the Amundsen Sea while E.crystallorophias was most concentrated in polynyas of Prydz Bay.E.superba,with an average abundance of 34.05 ind·(1000 m-3)and biomass of 11.80 g·(1000 m-3),was mainly distributed in the Antarctic Peninsula and Prydz Bay.This study also identified regional variations in mean body length and frequency distributions of krill.The relationship between krill body length and wet weight followed a power-law pattern.Regional differences were observed in the relationship between krill abundance,biomass,and environmental factors with varying correlations.In the Amundsen Sea,no significant correlation was found between krill abundance and environmental factors.Notably,E.crystallorophias in Prydz Bay demonstrated a significant positive correlation with chlorophyll a concentration,while T.macrura abundance and biomass in the Antarctic Peninsula exhibited a significant negative correlation with ice-free days.The findings contribute valuable regional data on krill distribution,abundance,and biomass in the Southern Ocean,serving as foundational information for the conservation of the Southern Ocean ecosystem and Antarctic krill fishery management on a circumpolar scale.
FANG Xiaoyue;HU Shugang;WANG Yanqing;ZHANG Zishang;TAO Zhencheng;YANG Guang
College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China||Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,ChinaCollege of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,ChinaEngineering Technology Department,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,ChinaKey Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China||Qingdao University of Science and Technology,Qingdao 266042,ChinaKey Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China||Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China||University of Chinese Academy of Sciences,Beijing 10049,ChinaKey Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China||Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China||Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China||University of Chinese Academy of Sciences,Beijing 10049,China
Southern OceankrillEuphausia superbabiomassdataset
《极地科学进展（英文版）》 2024 (003)
370-384 / 15
The authors would like to thank the crews on R/V Xuelong for their support and help during the sampling process.This work was supported by Marine S&T Fund of Shandong Province for Qingdao Marine Science and Technology Center(Grant no.2022QNLM030002-1),National Natural Science Foundation of China(Grant no.42276238),National Polar Special Program"Impact and Response of Antarctic Seas to Climate Change"(Grant no.IRASCC 01-02-01D)and Taishan Scholars Program.We would like to thank reviewer Dr.Guglielmo Letterio,one anonymous reviewer and Associate Editor Dr.Chaolun Li,for their valuable suggestions and comments that improved this article.
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