Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences?
Two key players in the Arctic and subarctic marine ecosystem are the calanoid copepods, Calanus finmarchicus and C. glacialis. Although morphologically very similar, these sibling species have different life cycles and roles in the Arctic pelagic marine ecosystem. Considering that the distribution o...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | https://orbit.dtu.dk/en/publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f https://doi.org/10.1007/s00227-014-2419-5 |
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ftdtupubl:oai:pure.atira.dk:publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f 2024-09-15T18:00:42+00:00 Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? Nielsen, Torkel Gissel Kjellerup, Sanne Smolina, Irina Hoarau, Galice Lindeque, Penelope 2014 https://orbit.dtu.dk/en/publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f https://doi.org/10.1007/s00227-014-2419-5 eng eng https://orbit.dtu.dk/en/publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f info:eu-repo/semantics/closedAccess Nielsen , T G , Kjellerup , S , Smolina , I , Hoarau , G & Lindeque , P 2014 , ' Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? ' , Marine Biology , vol. 161 , no. 6 , pp. 1299-1306 . https://doi.org/10.1007/s00227-014-2419-5 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2014 ftdtupubl https://doi.org/10.1007/s00227-014-2419-5 2024-07-29T23:50:17Z Two key players in the Arctic and subarctic marine ecosystem are the calanoid copepods, Calanus finmarchicus and C. glacialis. Although morphologically very similar, these sibling species have different life cycles and roles in the Arctic pelagic marine ecosystem. Considering that the distribution of C. glacialis corresponds to Arctic water masses and C. finmarchicus to Atlantic water masses, the species are frequently used as climate indicators. Consequently, correct identification of the two species is essential if we want to understand climate-impacted changes on Calanus-dominated marine ecosystems such as the Arctic. Here, we present a novel morphological character (redness) to distinguish live females of C. glacialis and C. finmarchicus and compare it to morphological (prosome length) and genetic identification. The characters are tested on 300 live females of C. glacialis and C. finmarchicus from Disko Bay, western Greenland. Our analysis confirms that length cannot be used as a stand-alone criterion for separation. The results based on the new morphological character were verified genetically using a single mitochondrial marker (16S) and nuclear loci (six microsatellites and 12 InDels). The pigmentation criterion was also used on individuals (n = 89) from Young Sound fjord, northeast Greenland to determine whether the technique was viable in different geographical locations. Genetic markers based on mitochondrial and nuclear loci were corroborative in their identification of individuals and revealed no hybrids. Molecular identification confirmed that live females of the two species from Greenlandic waters, both East and West, can easily be separated by the red pigmentation of the antenna and somites of C. glacialis in contrast to the pale opaque antenna and somites of C. finmarchicus, confirming that the pigmentation criterion is valid for separation of the two species Article in Journal/Newspaper Calanus finmarchicus Calanus glacialis Disko Bay Greenland greenlandic Subarctic Copepods Technical University of Denmark: DTU Orbit Marine Biology 161 6 1299 1306 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Nielsen, Torkel Gissel Kjellerup, Sanne Smolina, Irina Hoarau, Galice Lindeque, Penelope Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Two key players in the Arctic and subarctic marine ecosystem are the calanoid copepods, Calanus finmarchicus and C. glacialis. Although morphologically very similar, these sibling species have different life cycles and roles in the Arctic pelagic marine ecosystem. Considering that the distribution of C. glacialis corresponds to Arctic water masses and C. finmarchicus to Atlantic water masses, the species are frequently used as climate indicators. Consequently, correct identification of the two species is essential if we want to understand climate-impacted changes on Calanus-dominated marine ecosystems such as the Arctic. Here, we present a novel morphological character (redness) to distinguish live females of C. glacialis and C. finmarchicus and compare it to morphological (prosome length) and genetic identification. The characters are tested on 300 live females of C. glacialis and C. finmarchicus from Disko Bay, western Greenland. Our analysis confirms that length cannot be used as a stand-alone criterion for separation. The results based on the new morphological character were verified genetically using a single mitochondrial marker (16S) and nuclear loci (six microsatellites and 12 InDels). The pigmentation criterion was also used on individuals (n = 89) from Young Sound fjord, northeast Greenland to determine whether the technique was viable in different geographical locations. Genetic markers based on mitochondrial and nuclear loci were corroborative in their identification of individuals and revealed no hybrids. Molecular identification confirmed that live females of the two species from Greenlandic waters, both East and West, can easily be separated by the red pigmentation of the antenna and somites of C. glacialis in contrast to the pale opaque antenna and somites of C. finmarchicus, confirming that the pigmentation criterion is valid for separation of the two species |
format |
Article in Journal/Newspaper |
author |
Nielsen, Torkel Gissel Kjellerup, Sanne Smolina, Irina Hoarau, Galice Lindeque, Penelope |
author_facet |
Nielsen, Torkel Gissel Kjellerup, Sanne Smolina, Irina Hoarau, Galice Lindeque, Penelope |
author_sort |
Nielsen, Torkel Gissel |
title |
Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
title_short |
Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
title_full |
Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
title_fullStr |
Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
title_full_unstemmed |
Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? |
title_sort |
live discrimination of calanus glacialis and c. finmarchicus females: can we trust phenological differences? |
publishDate |
2014 |
url |
https://orbit.dtu.dk/en/publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f https://doi.org/10.1007/s00227-014-2419-5 |
genre |
Calanus finmarchicus Calanus glacialis Disko Bay Greenland greenlandic Subarctic Copepods |
genre_facet |
Calanus finmarchicus Calanus glacialis Disko Bay Greenland greenlandic Subarctic Copepods |
op_source |
Nielsen , T G , Kjellerup , S , Smolina , I , Hoarau , G & Lindeque , P 2014 , ' Live discrimination of Calanus glacialis and C. finmarchicus females: can we trust phenological differences? ' , Marine Biology , vol. 161 , no. 6 , pp. 1299-1306 . https://doi.org/10.1007/s00227-014-2419-5 |
op_relation |
https://orbit.dtu.dk/en/publications/ac76c1af-70c8-4b2f-994e-8419d9c71f3f |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00227-014-2419-5 |
container_title |
Marine Biology |
container_volume |
161 |
container_issue |
6 |
container_start_page |
1299 |
op_container_end_page |
1306 |
_version_ |
1810437874902892544 |