Parasitic flatworms infecting thorny skate, Amblyraja radiata: infection by the monogeneans Acanthocotyle verrilli and Rajonchocotyle emarginata in Svalbard
| Autor: | Tom Artois, Maarten P.M. Vanhove, Oleg Ditrich, Raquel Hermans, Nikol Kmentová, Milan Gelnar, Tomáš Tyml |
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| Přispěvatelé: | Hermans, Raquel, VANHOVE, Maarten, Ditrich, Oleg, Tyml, Tomáš, Gelnar, Milan, ARTOIS, Tom, KMENTOVA, Nikol |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0303 health sciences geography geography.geographical_feature_category biology Range (biology) Radiata Zoology Species diversity biology.organism_classification 010603 evolutionary biology 01 natural sciences 030308 mycology & parasitology Bycatch Thorny skate 03 medical and health sciences Taxon Archipelago 14. Life underwater Amblyraja |
| Popis: | Parasite diversity above the Arctic circle remains understudied even for commercially valuable host taxa. Thorny skate,Amblyraja radiata,is a common bycatch species with a growing commercial value. Its natural range covers both sides of the North Atlantic including the Arctic zone. Svalbard is a Norwegian archipelago located on the northwest corner of the Barents Shelf which sustains a spectacular species diversity. So far, several monogenean species have been reported infecting thorny skate across the Atlantic Ocean. In the present study, we intend to fill in the knowledge gap on monogenean parasites infecting thorny skate in the northern part of its range and thus indirectly assess the connectivity between the thorny skate populations off the Svalbard coast and from previously studied locations. 46 monogenean individuals were recovered from 11 specimens of thorny skate. Following morphological and molecular assessment, two species of monogeneans,Acanthocotyle verrilliandRajonchocotyle emarginata,were identified. The results serve as the northernmost record for both parasite genera and the first record of monogenean species off Svalbard. Detailed morphometric evaluation revealed a relatively high level of morphological variation inA. verrillicompared to its congeners. Phylogenetic reconstruction placedA. verrilliin a well-supported clade withA. imo.Our study also suggests high diagnostic significance of sclerotised structures in the identification ofRajonchocotyle.Even though the occurrence of two directly transmitted parasite species supports the previously suggested long-distance migration ofA. radiata, future studies employing highly variable genetic markers are needed to assess the ongoing and historical migration patterns.HighlightsFirst record of monogenean species in SvalbardNorthernmost record for representatives of Acanthocotylidae and HexabothriidaeTransatlantic occurrence of parasites supports connectivity of thorny skate populations |
| Databáze: | OpenAIRE |
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