Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications
Whale lice (Cyamidae; Amphipoda) are ectoparasitic crustaceans adapted to the marine environment with cetaceans as their host. There are few reports of cyamids occurring in odontocetes from the North Sea, and long-term studies are lacking. Marine mammal health was monitored along the German and Dutc...
Published in: | International Journal for Parasitology: Parasites and Wildlife |
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ftpubmed:oai:pubmedcentral.nih.gov:8079326 2023-05-15T17:59:15+02:00 Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications Lehnert, Kristina IJsseldijk, Lonneke L. Uy, May Li Boyi, Joy Ometere van Schalkwijk, Linde Tollenaar, Eveline A.P. Gröne, Andrea Wohlsein, Peter Siebert, Ursula 2021-04-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8079326/ https://doi.org/10.1016/j.ijppaw.2021.02.015 en eng Elsevier http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8079326/ http://dx.doi.org/10.1016/j.ijppaw.2021.02.015 © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). CC-BY-NC-ND Int J Parasitol Parasites Wildl Regular Article Text 2021 ftpubmed https://doi.org/10.1016/j.ijppaw.2021.02.015 2021-05-02T01:01:39Z Whale lice (Cyamidae; Amphipoda) are ectoparasitic crustaceans adapted to the marine environment with cetaceans as their host. There are few reports of cyamids occurring in odontocetes from the North Sea, and long-term studies are lacking. Marine mammal health was monitored along the German and Dutch coasts in the past decades, with extensive post mortem investigations conducted. The aim of this study was to analyse archived ectoparasite samples from stranded cetaceans from the North Sea (2010–2019), to determine species, prevalence and impact of ectoparasite infection. Ectoparasites were found on two cetacean species – harbour porpoises (Phocoena phocoena), as the most abundant cetacean species in the North Sea, and on a pilot whale (Globicephala melas), as a rare species here. Prevalence of ectoparasitic crustaceans in cetaceans was low: 7.6% in porpoises stranded in the Netherlands (n = 608) and 1.6% in porpoises stranded in Germany (n = 122). All whale lice infections were found on hosts with skin lesions characterised by ulcerations. Morphological investigations revealed characteristic differences between the cyamid species Isocyamus (I.) delphinii and I. deltobranchium identified. Isocyamus deltobranchium was determined in all infected harbour porpoises. I. delphinii was identified on only the pilot whale. Molecular analyses showed 88% similarity of mDNA COI sequences of I. delphinii with I. deltobranchium supporting them as separate species. Phylogenetic analyses of additional gene loci are required to fully assess the diversity and exchange of whale lice species between geographical regions as well as host specificity. Differing whale lice prevalences in porpoises stranded in the Netherlands and Germany could indicate a difference in severity of skin lesions between these areas. It should be further investigated if more inter- or intraspecific contact, e.g., due to a higher density of porpoises or contact with other cetaceans, or a poorer health status of porpoises in the southern North Sea could explain ... Text Phocoena phocoena PubMed Central (PMC) International Journal for Parasitology: Parasites and Wildlife 15 22 30 |
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Regular Article |
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Regular Article Lehnert, Kristina IJsseldijk, Lonneke L. Uy, May Li Boyi, Joy Ometere van Schalkwijk, Linde Tollenaar, Eveline A.P. Gröne, Andrea Wohlsein, Peter Siebert, Ursula Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
topic_facet |
Regular Article |
description |
Whale lice (Cyamidae; Amphipoda) are ectoparasitic crustaceans adapted to the marine environment with cetaceans as their host. There are few reports of cyamids occurring in odontocetes from the North Sea, and long-term studies are lacking. Marine mammal health was monitored along the German and Dutch coasts in the past decades, with extensive post mortem investigations conducted. The aim of this study was to analyse archived ectoparasite samples from stranded cetaceans from the North Sea (2010–2019), to determine species, prevalence and impact of ectoparasite infection. Ectoparasites were found on two cetacean species – harbour porpoises (Phocoena phocoena), as the most abundant cetacean species in the North Sea, and on a pilot whale (Globicephala melas), as a rare species here. Prevalence of ectoparasitic crustaceans in cetaceans was low: 7.6% in porpoises stranded in the Netherlands (n = 608) and 1.6% in porpoises stranded in Germany (n = 122). All whale lice infections were found on hosts with skin lesions characterised by ulcerations. Morphological investigations revealed characteristic differences between the cyamid species Isocyamus (I.) delphinii and I. deltobranchium identified. Isocyamus deltobranchium was determined in all infected harbour porpoises. I. delphinii was identified on only the pilot whale. Molecular analyses showed 88% similarity of mDNA COI sequences of I. delphinii with I. deltobranchium supporting them as separate species. Phylogenetic analyses of additional gene loci are required to fully assess the diversity and exchange of whale lice species between geographical regions as well as host specificity. Differing whale lice prevalences in porpoises stranded in the Netherlands and Germany could indicate a difference in severity of skin lesions between these areas. It should be further investigated if more inter- or intraspecific contact, e.g., due to a higher density of porpoises or contact with other cetaceans, or a poorer health status of porpoises in the southern North Sea could explain ... |
format |
Text |
author |
Lehnert, Kristina IJsseldijk, Lonneke L. Uy, May Li Boyi, Joy Ometere van Schalkwijk, Linde Tollenaar, Eveline A.P. Gröne, Andrea Wohlsein, Peter Siebert, Ursula |
author_facet |
Lehnert, Kristina IJsseldijk, Lonneke L. Uy, May Li Boyi, Joy Ometere van Schalkwijk, Linde Tollenaar, Eveline A.P. Gröne, Andrea Wohlsein, Peter Siebert, Ursula |
author_sort |
Lehnert, Kristina |
title |
Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
title_short |
Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
title_full |
Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
title_fullStr |
Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
title_full_unstemmed |
Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications |
title_sort |
whale lice (isocyamus deltobranchium & isocyamus delphinii; cyamidae) prevalence in odontocetes off the german and dutch coasts – morphological and molecular characterization and health implications |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8079326/ https://doi.org/10.1016/j.ijppaw.2021.02.015 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Int J Parasitol Parasites Wildl |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8079326/ http://dx.doi.org/10.1016/j.ijppaw.2021.02.015 |
op_rights |
© 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.ijppaw.2021.02.015 |
container_title |
International Journal for Parasitology: Parasites and Wildlife |
container_volume |
15 |
container_start_page |
22 |
op_container_end_page |
30 |
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1766168027010695168 |