Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas
Harbour seals (Phoca vitulina) and grey seals (Halichoerus grypus) are final hosts of acanthocephalans in the German North and Baltic Seas. Parasitic infections in seals can cause pathological changes, which may result in deteriorated health of the host. Common gastrointestinal parasites of harbour...
Published in: | International Journal for Parasitology: Parasites and Wildlife |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.ijppaw.2018.01.002 https://doaj.org/article/f997a12a762f420f88fa6a7f14fca392 |
id |
ftdoajarticles:oai:doaj.org/article:f997a12a762f420f88fa6a7f14fca392 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:f997a12a762f420f88fa6a7f14fca392 2023-05-15T17:58:57+02:00 Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas Patrick Waindok Kristina Lehnert Ursula Siebert Iwona Pawliczka Christina Strube 2018-04-01T00:00:00Z https://doi.org/10.1016/j.ijppaw.2018.01.002 https://doaj.org/article/f997a12a762f420f88fa6a7f14fca392 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2213224417301141 https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2018.01.002 https://doaj.org/article/f997a12a762f420f88fa6a7f14fca392 International Journal for Parasitology: Parasites and Wildlife, Vol 7, Iss 1, Pp 34-43 (2018) Zoology QL1-991 article 2018 ftdoajarticles https://doi.org/10.1016/j.ijppaw.2018.01.002 2022-12-31T01:36:27Z Harbour seals (Phoca vitulina) and grey seals (Halichoerus grypus) are final hosts of acanthocephalans in the German North and Baltic Seas. Parasitic infections in seals can cause pathological changes, which may result in deteriorated health of the host. Common gastrointestinal parasites of harbour and grey seals are acanthocephalans and a number of 275 of 2460 (11.2%) investigated seals from 1996 to 2013 were infected with Corynosoma spp. (Acanthocephala, Polymorphidae). The prevalence showed a wave-like pattern: it increased from 1.2% and 0.4% in 1996 and 1997, respectively, to 23.9% during the second phocine distemper epizootic in 2002 and decreased to 6.2% in 2004. In 2005, prevalence peaked again with 25.0% followed by a decrease to 9.3% in 2009 and an increase to 38.5% in 2012. Statistical analysis revealed that harbour seals originating from the North Sea showed a higher prevalence than grey seals, whereas no significant difference between grey and harbour seals from the Baltic Sea was observed. Furthermore, juvenile pinnipedia from the North Sea were significantly less infected with Corynosoma spp. than seals older than seven month. Molecular species identification as well as phylogenetic relationship analysis among the detected Corynosoma species were achieved by sequencing and comparisons of the ribosomal ITS1-5.8S-ITS2-complex and cytochrome-c-oxidase I gene. Molecular analysis resulted in a newly arranged distribution of Acanthocephala in the North Sea as in contrast to previous studies, C. strumosum could not be confirmed as predominant species. Instead, C. magdaleni and a C. magdaleni isolate (isolate Pv1NS) with an atypical number of longitudinal rows of hooks at the proboscis were detected. Furthermore, morphological and molecular analyses indicate the possible finding of a cryptic species (Candidatus Corynosoma nortmeri sp. nov.). Keywords: Acanthocephala, Acantocephalans, Corynosoma, Seals, ITS, Cytochrome-c-oxidase, Marine parasites Article in Journal/Newspaper Phoca vitulina Directory of Open Access Journals: DOAJ Articles International Journal for Parasitology: Parasites and Wildlife 7 1 34 43 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 |
spellingShingle |
Zoology QL1-991 Patrick Waindok Kristina Lehnert Ursula Siebert Iwona Pawliczka Christina Strube Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
topic_facet |
Zoology QL1-991 |
description |
Harbour seals (Phoca vitulina) and grey seals (Halichoerus grypus) are final hosts of acanthocephalans in the German North and Baltic Seas. Parasitic infections in seals can cause pathological changes, which may result in deteriorated health of the host. Common gastrointestinal parasites of harbour and grey seals are acanthocephalans and a number of 275 of 2460 (11.2%) investigated seals from 1996 to 2013 were infected with Corynosoma spp. (Acanthocephala, Polymorphidae). The prevalence showed a wave-like pattern: it increased from 1.2% and 0.4% in 1996 and 1997, respectively, to 23.9% during the second phocine distemper epizootic in 2002 and decreased to 6.2% in 2004. In 2005, prevalence peaked again with 25.0% followed by a decrease to 9.3% in 2009 and an increase to 38.5% in 2012. Statistical analysis revealed that harbour seals originating from the North Sea showed a higher prevalence than grey seals, whereas no significant difference between grey and harbour seals from the Baltic Sea was observed. Furthermore, juvenile pinnipedia from the North Sea were significantly less infected with Corynosoma spp. than seals older than seven month. Molecular species identification as well as phylogenetic relationship analysis among the detected Corynosoma species were achieved by sequencing and comparisons of the ribosomal ITS1-5.8S-ITS2-complex and cytochrome-c-oxidase I gene. Molecular analysis resulted in a newly arranged distribution of Acanthocephala in the North Sea as in contrast to previous studies, C. strumosum could not be confirmed as predominant species. Instead, C. magdaleni and a C. magdaleni isolate (isolate Pv1NS) with an atypical number of longitudinal rows of hooks at the proboscis were detected. Furthermore, morphological and molecular analyses indicate the possible finding of a cryptic species (Candidatus Corynosoma nortmeri sp. nov.). Keywords: Acanthocephala, Acantocephalans, Corynosoma, Seals, ITS, Cytochrome-c-oxidase, Marine parasites |
format |
Article in Journal/Newspaper |
author |
Patrick Waindok Kristina Lehnert Ursula Siebert Iwona Pawliczka Christina Strube |
author_facet |
Patrick Waindok Kristina Lehnert Ursula Siebert Iwona Pawliczka Christina Strube |
author_sort |
Patrick Waindok |
title |
Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
title_short |
Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
title_full |
Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
title_fullStr |
Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
title_full_unstemmed |
Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas |
title_sort |
prevalence and molecular characterisation of acanthocephala in pinnipedia of the north and baltic seas |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://doi.org/10.1016/j.ijppaw.2018.01.002 https://doaj.org/article/f997a12a762f420f88fa6a7f14fca392 |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
International Journal for Parasitology: Parasites and Wildlife, Vol 7, Iss 1, Pp 34-43 (2018) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2213224417301141 https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2018.01.002 https://doaj.org/article/f997a12a762f420f88fa6a7f14fca392 |
op_doi |
https://doi.org/10.1016/j.ijppaw.2018.01.002 |
container_title |
International Journal for Parasitology: Parasites and Wildlife |
container_volume |
7 |
container_issue |
1 |
container_start_page |
34 |
op_container_end_page |
43 |
_version_ |
1766167683827499008 |