Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46575 10.2205/2021ES000759 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Trace element concentration in Antarctic krill reflecting their distribution in the Weddell Sea Trace element concentration in Antarctic krill reflecting their distribution in the Weddell Sea Solomatina A S Solomatina A S blackmaple@yandex.ru Demina L L Demina L L Spiridonov V A Spiridonov V A Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru 21 4 29 10 2021 https://rjes.ru/en/nauka/article/46575/view

Distribution of Al, As, Cd, Co, Cu, Fe, Mn, Mo, Ni, Pb, Rb, and Zn in the main body parts and total samples of juvenile Antarctic krill Euphausia superba was examined in the northeastern Weddell Sea. The increased contents of Al, Fe, and Mn in total specimens of juvenile krill were detected in the coastal regions near the South Shetland and South Orkney Islands. It can be attributed to high concentration of suspended particulate matter that serve as food for krill both in shallow and deep water. The cephalothorax was found to be an organ of the elevated concentration of Al, Zn, Cu, and Fe; Mo accumulated primarily in the abdominal muscles, while Ni, Co, Cd, As, Rb, and Pb did not show a predominant accumulation in certain krill tissues. The contents of potentially toxic Zn, Cd, Cu, and Pb in the total krill mass did not exceed the maximum permissible concentration (MPC) for marine seafood products, while that of As was two times greater than the MPC that might be caused by both natural and anthropogenic factors.

Distribution of Al, As, Cd, Co, Cu, Fe, Mn, Mo, Ni, Pb, Rb, and Zn in the main body parts and total samples of juvenile Antarctic krill Euphausia superba was examined in the northeastern Weddell Sea. The increased contents of Al, Fe, and Mn in total specimens of juvenile krill were detected in the coastal regions near the South Shetland and South Orkney Islands. It can be attributed to high concentration of suspended particulate matter that serve as food for krill both in shallow and deep water. The cephalothorax was found to be an organ of the elevated concentration of Al, Zn, Cu, and Fe; Mo accumulated primarily in the abdominal muscles, while Ni, Co, Cd, As, Rb, and Pb did not show a predominant accumulation in certain krill tissues. The contents of potentially toxic Zn, Cd, Cu, and Pb in the total krill mass did not exceed the maximum permissible concentration (MPC) for marine seafood products, while that of As was two times greater than the MPC that might be caused by both natural and anthropogenic factors.

 Antarctica krill Euphausia superba heavy metals trace elements bioaccumulation Antarctica krill Euphausia superba heavy metals trace elements bioaccumulation This work was supported by the Science and Education Ministry of Russian Fed- eration, State task no. 0128-2019-0008, chemical analysis was supported by Russian Science Foun- dation, project no. 19-17-00234.

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