© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the
This study presents a first circumpolar screening of the taxonomic and genetic diversity of the crustacean Lepidurus arcticus, belonging to the ‘living fossil ’ order Notostraca. Sequencing of a 484 bp segment of the mitochondrial 12S rDNA from 48 populations revealed two distinct haplogroups, each...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.547.3748 2023-05-15T15:40:01+02:00 © 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the Notostracan Lepidurus Arcticus Dag O. Hessen Eli K. Rueness Marianne Stabell The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3748 http://www.triops.es/articulos/paper8.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3748 http://www.triops.es/articulos/paper8.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.triops.es/articulos/paper8.pdf text 2003 ftciteseerx 2016-01-08T11:21:01Z This study presents a first circumpolar screening of the taxonomic and genetic diversity of the crustacean Lepidurus arcticus, belonging to the ‘living fossil ’ order Notostraca. Sequencing of a 484 bp segment of the mitochondrial 12S rDNA from 48 populations revealed two distinct haplogroups, each consisting of separate haplotypes. Align-ment with published sequences of other species of Lepidurus clearly revealed that all of the studied populations were distinctly different from other species. Some major geographical patterns for distribution of haplogroups and haplotypes were identified, perhaps the most remarkable being the difference in distribution of haplogroups between the neighbouring Svalbard and Bear Island where a larger number of populations were studied. On the Norwegian mainland both haplogroups co-occurred in the same areas, however, and strong conclusions of the distributional pattern are yet premature. The distribution of similar haplotypes over wide geographical ranges suggests high dispersal abilities by Lepidurus. Morphological taxonomic criteria assign all surveyed populations to L. arcticus in spite of a pronounced morphological plasticity. Analysis of major morphological features such as length:width ratio of cephalothorax, the cephalothorax:abdominal length ratio, size of supra-anal plate and eye morphology revealed some distinctive population specific properties. The two major haplogroups differed significantly with regard to the relative size of the supra-anal plate, which also is a standard taxonomic criterion. This first genetic screening of a limited number of populations suggests that a subtler genetic diversity will be revealed when including more populations over a larger geographic area as well as a finer geographical resolution. Text Bear Island Svalbard Unknown Bear Island ENVELOPE(-67.250,-67.250,-68.151,-68.151) Svalbard |
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ftciteseerx |
language |
English |
description |
This study presents a first circumpolar screening of the taxonomic and genetic diversity of the crustacean Lepidurus arcticus, belonging to the ‘living fossil ’ order Notostraca. Sequencing of a 484 bp segment of the mitochondrial 12S rDNA from 48 populations revealed two distinct haplogroups, each consisting of separate haplotypes. Align-ment with published sequences of other species of Lepidurus clearly revealed that all of the studied populations were distinctly different from other species. Some major geographical patterns for distribution of haplogroups and haplotypes were identified, perhaps the most remarkable being the difference in distribution of haplogroups between the neighbouring Svalbard and Bear Island where a larger number of populations were studied. On the Norwegian mainland both haplogroups co-occurred in the same areas, however, and strong conclusions of the distributional pattern are yet premature. The distribution of similar haplotypes over wide geographical ranges suggests high dispersal abilities by Lepidurus. Morphological taxonomic criteria assign all surveyed populations to L. arcticus in spite of a pronounced morphological plasticity. Analysis of major morphological features such as length:width ratio of cephalothorax, the cephalothorax:abdominal length ratio, size of supra-anal plate and eye morphology revealed some distinctive population specific properties. The two major haplogroups differed significantly with regard to the relative size of the supra-anal plate, which also is a standard taxonomic criterion. This first genetic screening of a limited number of populations suggests that a subtler genetic diversity will be revealed when including more populations over a larger geographic area as well as a finer geographical resolution. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Notostracan Lepidurus Arcticus Dag O. Hessen Eli K. Rueness Marianne Stabell |
spellingShingle |
Notostracan Lepidurus Arcticus Dag O. Hessen Eli K. Rueness Marianne Stabell © 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
author_facet |
Notostracan Lepidurus Arcticus Dag O. Hessen Eli K. Rueness Marianne Stabell |
author_sort |
Notostracan Lepidurus Arcticus |
title |
© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
title_short |
© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
title_full |
© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
title_fullStr |
© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
title_full_unstemmed |
© 2004 Kluwer Academic Publishers. Printed in the Netherlands. 73 Circumpolar analysis of morphological and genetic diversity in the |
title_sort |
© 2004 kluwer academic publishers. printed in the netherlands. 73 circumpolar analysis of morphological and genetic diversity in the |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3748 http://www.triops.es/articulos/paper8.pdf |
long_lat |
ENVELOPE(-67.250,-67.250,-68.151,-68.151) |
geographic |
Bear Island Svalbard |
geographic_facet |
Bear Island Svalbard |
genre |
Bear Island Svalbard |
genre_facet |
Bear Island Svalbard |
op_source |
http://www.triops.es/articulos/paper8.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.3748 http://www.triops.es/articulos/paper8.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766372122207191040 |