Attachment performance of the ectoparasitic seal louse Echinophthirius horridus.


Journal

Communications biology
ISSN: 2399-3642
Titre abrégé: Commun Biol
Pays: England
ID NLM: 101719179

Informations de publication

Date de publication:
05 Jan 2024
Historique:
received: 13 09 2023
accepted: 18 12 2023
medline: 6 1 2024
pubmed: 6 1 2024
entrez: 5 1 2024
Statut: epublish

Résumé

Marine mammals host a great variety of parasites, which usually co-evolved in evolutionary arms races. However, little is known about the biology of marine mammal insect parasites, and even less about physical aspects of their life in such a challenging environment. One of 13 insect species that manage to endure long diving periods in the open sea is the seal louse, Echinophthirius horridus, parasitising true seals. Its survival depends on its specialised adaptations for enduring extreme conditions such as hypoxia, temperature changes, hydrostatic pressure, and strong drag forces during host dives. To maintain a grip on the seal fur, the louse's leg morphology is equipped with modified snap hook claws and soft pad-like structures that enhance friction. Through techniques including CLSM, SEM, and histological staining, we have examined the attachment system's detailed structure. Remarkably, the seal louse achieves exceptional attachment forces on seal fur, with safety factors (force per body weight) reaching 4500 in average measurements and up to 18000 in peak values, indicating superior attachment performance compared to other insect attachment systems. These findings underscore the louse's remarkable adaptations for life in a challenging marine environment, shedding light on the relationship between structure and function in extreme ecological niches.

Identifiants

pubmed: 38182875
doi: 10.1038/s42003-023-05722-0
pii: 10.1038/s42003-023-05722-0
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

36

Subventions

Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : GO 995 46-1

Informations de copyright

© 2024. The Author(s).

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Auteurs

Anika Preuss (A)

Department of Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Kiel, Germany. apreuss@zoologie.uni-kiel.de.

Thies H Büscher (TH)

Department of Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Kiel, Germany.

Insa Herzog (I)

Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Büsum, Germany.

Peter Wohlsein (P)

Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany.

Kristina Lehnert (K)

Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Büsum, Germany.

Stanislav N Gorb (SN)

Department of Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Kiel, Germany.

Classifications MeSH