Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic
Euphausiid larvae were collected in the Weddell Scotia Confluence region in summer 2011, in the West Antarctic Peninsula and Scotia Sea in 2012, and in the South Orkneys Shelf in 2014. From 2011 to 2014 the larval stages geographic distribution and the distribution of water masses were consistent wi...
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ftnipr:oai:nipr.repo.nii.ac.jp:00015604 2023-05-15T13:49:00+02:00 Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic 2019-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15604 http://id.nii.ac.jp/1291/00015499/ en eng https://doi.org/10.1016/j.polar.2018.11.004 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15604 http://id.nii.ac.jp/1291/00015499/ Polar Science, 19, 86-93(2019-03) 18739652 Antarctic Peninsula Geographical distribution Krill larvae South Orkneys MPA Weddell-Scotia confluence Journal Article 2019 ftnipr https://doi.org/10.1016/j.polar.2018.11.004 2022-12-03T19:43:10Z Euphausiid larvae were collected in the Weddell Scotia Confluence region in summer 2011, in the West Antarctic Peninsula and Scotia Sea in 2012, and in the South Orkneys Shelf in 2014. From 2011 to 2014 the larval stages geographic distribution and the distribution of water masses were consistent with published information. The densities observed were compared between the cruises and with the 1981 and 1995 values by means of a kernel estimate of absolute and relative densities at a fixed grid of points. The values of Thysanoessa macrura were higher in 2011 and 2012 and those of Euphausia superba were lower than those observed in 1981 and 1995. Euphausia frigida did not show significant variations in absolute density but their relative values were higher than those of E. superba. No significant variations were observed in absolute values between 1981 and 1995. The opposite pattern was found in 2014, with significantly higher densities of E. superba than those of T. macrura. No single factor could be identified to explain these variations in density, suggesting the existence of complex mechanisms coupling the reproductive biology with oceanographic phenomena. Their description will require ample spatial and temporal monitoring rather than locally detailed observations. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Euphausia superba Polar Science Polar Science Scotia Sea Thysanoessa macrura National Institute of Polar Research Repository, Japan Antarctic The Antarctic Antarctic Peninsula Scotia Sea Weddell Polar Science 19 86 93 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Antarctic Peninsula Geographical distribution Krill larvae South Orkneys MPA Weddell-Scotia confluence |
spellingShingle |
Antarctic Peninsula Geographical distribution Krill larvae South Orkneys MPA Weddell-Scotia confluence Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
topic_facet |
Antarctic Peninsula Geographical distribution Krill larvae South Orkneys MPA Weddell-Scotia confluence |
description |
Euphausiid larvae were collected in the Weddell Scotia Confluence region in summer 2011, in the West Antarctic Peninsula and Scotia Sea in 2012, and in the South Orkneys Shelf in 2014. From 2011 to 2014 the larval stages geographic distribution and the distribution of water masses were consistent with published information. The densities observed were compared between the cruises and with the 1981 and 1995 values by means of a kernel estimate of absolute and relative densities at a fixed grid of points. The values of Thysanoessa macrura were higher in 2011 and 2012 and those of Euphausia superba were lower than those observed in 1981 and 1995. Euphausia frigida did not show significant variations in absolute density but their relative values were higher than those of E. superba. No significant variations were observed in absolute values between 1981 and 1995. The opposite pattern was found in 2014, with significantly higher densities of E. superba than those of T. macrura. No single factor could be identified to explain these variations in density, suggesting the existence of complex mechanisms coupling the reproductive biology with oceanographic phenomena. Their description will require ample spatial and temporal monitoring rather than locally detailed observations. |
format |
Article in Journal/Newspaper |
title |
Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
title_short |
Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
title_full |
Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
title_fullStr |
Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
title_full_unstemmed |
Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic |
title_sort |
variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the atlantic sector of the antarctic |
publishDate |
2019 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15604 http://id.nii.ac.jp/1291/00015499/ |
geographic |
Antarctic The Antarctic Antarctic Peninsula Scotia Sea Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Scotia Sea Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Euphausia superba Polar Science Polar Science Scotia Sea Thysanoessa macrura |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Euphausia superba Polar Science Polar Science Scotia Sea Thysanoessa macrura |
op_relation |
https://doi.org/10.1016/j.polar.2018.11.004 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15604 http://id.nii.ac.jp/1291/00015499/ Polar Science, 19, 86-93(2019-03) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2018.11.004 |
container_title |
Polar Science |
container_volume |
19 |
container_start_page |
86 |
op_container_end_page |
93 |
_version_ |
1766250384994598912 |