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Genetics redraws pelagic biogeography of Calanus.

https://arctichealth.org/en/permalink/ahliterature292203
Source
Biol Lett. 2017 Dec; 13(12):
Publication Type
Journal Article
Date
Dec-2017
Author
Marvin Choquet
Maja Hatlebakk
Anusha K S Dhanasiri
Ksenia Kosobokova
Irina Smolina
Janne E Søreide
Camilla Svensen
Webjørn Melle
Slawomir Kwasniewski
Ketil Eiane
Malin Daase
Vigdis Tverberg
Stig Skreslet
Ann Bucklin
Galice Hoarau
Author Affiliation
Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway marvin.choquet@nord.no.
Source
Biol Lett. 2017 Dec; 13(12):
Date
Dec-2017
Language
English
Publication Type
Journal Article
Keywords
Animals
Arctic Regions
Atlantic Ocean
Copepoda - anatomy & histology - classification - genetics
Genetic markers
INDEL Mutation
Sequence Analysis, DNA
Abstract
Planktonic copepods of the genus Calanus play a central role in North Atlantic/Arctic marine food webs. Here, using molecular markers, we redrew the distributional ranges of Calanus species inhabiting the North Atlantic and Arctic Oceans and revealed much wider and more broadly overlapping distributions than previously described. The Arctic shelf species, C. glacialis, dominated the zooplankton assemblage of many Norwegian fjords, where only C. finmarchicus has been reported previously. In these fjords, high occurrences of the Arctic species C. hyperboreus were also found. Molecular markers revealed that the most common method of species identification, prosome length, cannot reliably discriminate the species in Norwegian fjords. Differences in degree of genetic differentiation among fjord populations of the two species suggested that C. glacialis is a more permanent resident of the fjords than C. finmarchicus We found no evidence of hybridization between the species. Our results indicate a critical need for the wider use of molecular markers to reliably identify and discriminate these morphologically similar copepod species, which serve as important indicators of climate responses.
Notes
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PubMed ID
29263132 View in PubMed
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Genetics redraws pelagic biogeography of Calanus.

https://arctichealth.org/en/permalink/ahliterature287749
Source
Biol Lett. 2017 Dec;13(12)
Publication Type
Article
Date
Dec-2017
Author
Marvin Choquet
Maja Hatlebakk
Anusha K S Dhanasiri
Ksenia Kosobokova
Irina Smolina
Janne E Søreide
Camilla Svensen
Webjørn Melle
Slawomir Kwasniewski
Ketil Eiane
Malin Daase
Vigdis Tverberg
Stig Skreslet
Ann Bucklin
Galice Hoarau
Source
Biol Lett. 2017 Dec;13(12)
Date
Dec-2017
Language
English
Publication Type
Article
Abstract
Planktonic copepods of the genus Calanus play a central role in North Atlantic/Arctic marine food webs. Here, using molecular markers, we redrew the distributional ranges of Calanus species inhabiting the North Atlantic and Arctic Oceans and revealed much wider and more broadly overlapping distributions than previously described. The Arctic shelf species, C. glacialis, dominated the zooplankton assemblage of many Norwegian fjords, where only C. finmarchicus has been reported previously. In these fjords, high occurrences of the Arctic species C. hyperboreus were also found. Molecular markers revealed that the most common method of species identification, prosome length, cannot reliably discriminate the species in Norwegian fjords. Differences in degree of genetic differentiation among fjord populations of the two species suggested that C. glacialis is a more permanent resident of the fjords than C. finmarchicus We found no evidence of hybridization between the species. Our results indicate a critical need for the wider use of molecular markers to reliably identify and discriminate these morphologically similar copepod species, which serve as important indicators of climate responses.
PubMed ID
29263132 View in PubMed
Less detail