Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation
Hookworms of the genus Uncinaria have been widely reported from juvenile pinnipeds, however investigations of their systematics has been limited, with only two species described, Uncinaria lucasi from northern fur seals (Callorhinus ursinus) and Uncinaria hamiltoni from South American sea lions (Ota...
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ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1502 2023-11-12T04:16:42+01:00 Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation Nadler, Steven A. Lyons, Eugene T. Pagan, Christopher Hyman, Derek Lewis, Edwin E. Beckman, Kimberlee Bell, Cameron M. Castinel, Aurelie DeLong, Robert L. Duignan, Padraig J. Farinpour, Cher Huntington, Kathy Burek Kuiken, Thijs Morgades, Diana Naem, Soraya Norman, Richard Parker, Corwin Ramos, Raul Spraker, Terry R. Berón-Vera, Bárbara 2013-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usdeptcommercepub/503 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1502/viewcontent/Nadler_IJP_2013_Molecular_systematics.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usdeptcommercepub/503 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1502/viewcontent/Nadler_IJP_2013_Molecular_systematics.pdf Publications, Agencies and Staff of the U.S. Department of Commerce Hookworm Pinniped Phylogenetics Molecular systematics Cophylogeny Species Morphometrics text 2013 ftunivnebraskali 2023-10-30T09:49:58Z Hookworms of the genus Uncinaria have been widely reported from juvenile pinnipeds, however investigations of their systematics has been limited, with only two species described, Uncinaria lucasi from northern fur seals (Callorhinus ursinus) and Uncinaria hamiltoni from South American sea lions (Otaria flavescens). Hookworms were sampled from these hosts and seven additional species including Steller sea lions (Eumetopias jubatus), California sea lions (Zalophus californianus), South American fur seals (Arctocephalus australis), Australian fur seals (Arctocephalus pusillus), New Zealand sea lions (Phocarctos hookeri), southern elephant seals (Mirounga leonina), and the Mediterranean monk seal (Monachus monachus). One hundred and thirteen individual hookworms, including an outgroup species, were sequenced for four genes representing two loci (nuclear ribosomal DNA and mitochondrial DNA). Phylogenetic analyses of these sequences recovered seven independent evolutionary lineages or species, including the described species and five undescribed species. The molecular evidence shows that U. lucasi parasitises both C. ursinus and E. jubatus, whereas U. hamiltoni parasitises O. flavescens and A. australis. The five undescribed hookworm species were each associated with single host species (Z. californianus, A. pusillus, P. hookeri, M. leonina and M. monachus). For parasites of otarids, patterns of Uncinaria host-sharing and phylogenetic relationships had a strong biogeographic component with separate clades of parasites from northern versus southern hemisphere hosts. Comparison of phylogenies for these hookworms and their hosts suggests that the association of U. lucasi with northern fur seals results from a host-switch from Steller sea lions. Morphometric data for U. lucasi shows marked host-associated size differences for both sexes, with U. lucasi individuals from E. jubatus significantly larger. This result suggests that adult growth of U. lucasi is reduced within the host species representing the more recent host– ... Text Elephant Seals Mirounga leonina Southern Elephant Seals Callorhinus ursinus University of Nebraska-Lincoln: DigitalCommons@UNL New Zealand |
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Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Hookworm Pinniped Phylogenetics Molecular systematics Cophylogeny Species Morphometrics |
spellingShingle |
Hookworm Pinniped Phylogenetics Molecular systematics Cophylogeny Species Morphometrics Nadler, Steven A. Lyons, Eugene T. Pagan, Christopher Hyman, Derek Lewis, Edwin E. Beckman, Kimberlee Bell, Cameron M. Castinel, Aurelie DeLong, Robert L. Duignan, Padraig J. Farinpour, Cher Huntington, Kathy Burek Kuiken, Thijs Morgades, Diana Naem, Soraya Norman, Richard Parker, Corwin Ramos, Raul Spraker, Terry R. Berón-Vera, Bárbara Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
topic_facet |
Hookworm Pinniped Phylogenetics Molecular systematics Cophylogeny Species Morphometrics |
description |
Hookworms of the genus Uncinaria have been widely reported from juvenile pinnipeds, however investigations of their systematics has been limited, with only two species described, Uncinaria lucasi from northern fur seals (Callorhinus ursinus) and Uncinaria hamiltoni from South American sea lions (Otaria flavescens). Hookworms were sampled from these hosts and seven additional species including Steller sea lions (Eumetopias jubatus), California sea lions (Zalophus californianus), South American fur seals (Arctocephalus australis), Australian fur seals (Arctocephalus pusillus), New Zealand sea lions (Phocarctos hookeri), southern elephant seals (Mirounga leonina), and the Mediterranean monk seal (Monachus monachus). One hundred and thirteen individual hookworms, including an outgroup species, were sequenced for four genes representing two loci (nuclear ribosomal DNA and mitochondrial DNA). Phylogenetic analyses of these sequences recovered seven independent evolutionary lineages or species, including the described species and five undescribed species. The molecular evidence shows that U. lucasi parasitises both C. ursinus and E. jubatus, whereas U. hamiltoni parasitises O. flavescens and A. australis. The five undescribed hookworm species were each associated with single host species (Z. californianus, A. pusillus, P. hookeri, M. leonina and M. monachus). For parasites of otarids, patterns of Uncinaria host-sharing and phylogenetic relationships had a strong biogeographic component with separate clades of parasites from northern versus southern hemisphere hosts. Comparison of phylogenies for these hookworms and their hosts suggests that the association of U. lucasi with northern fur seals results from a host-switch from Steller sea lions. Morphometric data for U. lucasi shows marked host-associated size differences for both sexes, with U. lucasi individuals from E. jubatus significantly larger. This result suggests that adult growth of U. lucasi is reduced within the host species representing the more recent host– ... |
format |
Text |
author |
Nadler, Steven A. Lyons, Eugene T. Pagan, Christopher Hyman, Derek Lewis, Edwin E. Beckman, Kimberlee Bell, Cameron M. Castinel, Aurelie DeLong, Robert L. Duignan, Padraig J. Farinpour, Cher Huntington, Kathy Burek Kuiken, Thijs Morgades, Diana Naem, Soraya Norman, Richard Parker, Corwin Ramos, Raul Spraker, Terry R. Berón-Vera, Bárbara |
author_facet |
Nadler, Steven A. Lyons, Eugene T. Pagan, Christopher Hyman, Derek Lewis, Edwin E. Beckman, Kimberlee Bell, Cameron M. Castinel, Aurelie DeLong, Robert L. Duignan, Padraig J. Farinpour, Cher Huntington, Kathy Burek Kuiken, Thijs Morgades, Diana Naem, Soraya Norman, Richard Parker, Corwin Ramos, Raul Spraker, Terry R. Berón-Vera, Bárbara |
author_sort |
Nadler, Steven A. |
title |
Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
title_short |
Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
title_full |
Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
title_fullStr |
Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
title_full_unstemmed |
Molecular Systematics of Pinniped Hookworms (Nematoda: Uncinaria ): Species Delimitation, Host Associations and Host-Induced Morphometric Variation |
title_sort |
molecular systematics of pinniped hookworms (nematoda: uncinaria ): species delimitation, host associations and host-induced morphometric variation |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2013 |
url |
https://digitalcommons.unl.edu/usdeptcommercepub/503 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1502/viewcontent/Nadler_IJP_2013_Molecular_systematics.pdf |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Elephant Seals Mirounga leonina Southern Elephant Seals Callorhinus ursinus |
genre_facet |
Elephant Seals Mirounga leonina Southern Elephant Seals Callorhinus ursinus |
op_source |
Publications, Agencies and Staff of the U.S. Department of Commerce |
op_relation |
https://digitalcommons.unl.edu/usdeptcommercepub/503 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1502/viewcontent/Nadler_IJP_2013_Molecular_systematics.pdf |
_version_ |
1782333767076020224 |