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Hokkaido University Collection of Scholarly and Academic Papers >
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Potential negative effects and heterogeneous distribution of a parasitic copepod Salmincola edwardsii (Copepoda: Lernaeopodidae) on Southern Asian Dolly Varden Salvelinus curilus in Hokkaido, Japan
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| Title: | Potential negative effects and heterogeneous distribution of a parasitic copepod Salmincola edwardsii (Copepoda: Lernaeopodidae) on Southern Asian Dolly Varden Salvelinus curilus in Hokkaido, Japan |
| Authors: | Hasegawa, Ryota Browse this author | | Ayer, Christopher G. Browse this author | | Umatani, Yoshiyuki Browse this author | | Miura, Kazuki Browse this author | | Ukumura, Miyo Browse this author | | Katahira, Hirotaka Browse this author →KAKEN DB | | Koizumi, Itsuro Browse this author →KAKEN DB |
| Keywords: | Salvelinus malma krascheninnikova | | Parasitic copepod | | Ectoparasite | | Host-parasite relationship | | Condition factor | | Salmincola |
| Issue Date: | Apr-2022 |
| Publisher: | Elsevier |
| Journal Title: | Parasitology International |
| Volume: | 87 |
| Start Page: | 102529 |
| Publisher DOI: | 10.1016/j.parint.2021.102529 |
| Abstract: | The genus Salmincola is an ectoparasitic copepod group commonly infesting the branchial and buccal cavities of salmonids. While negative impacts on hatchery fishes have been reported, their impacts on wild fish populations and distribution patterns are critically understudied. In the Shiretoko Peninsula, Hokkaido, Japan, we found parasites belonging to this genus on the branchial cavity of a stream salmonid, Southern Asian Dolly Varden Salvelinus curilus. All parasites recovered were identified as Salmincola edwardsii based on morphological characteristics and partial 28S rDNA sequences. Prevalence was highly heterogeneous even among neighboring streams (0-54.8%, < 10 km) with the mean intensity among streams being generally low (2.19 parasites/infeted fish). Despite the low intensity, quantile regression analysis showed negative trends between parasite intensity and host condition, suggesting that the infestation of S. edwardsii has a potential negative impact on the host salmonid. In addition, a single copepod was found from an anadromous fish, which could indicate some salinity tolerance of the copepods. It is important to evaluate the effects of Salmincola spp. on host species and determine the limiting factors on the parasite's distribution for proper management. |
| Rights: | © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/88947 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 長谷川 稜太
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