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Observations on Predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae)
| Title: | Observations on Predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae) |
| Authors: | Shiraki, Shoki Browse this author | | Kakui, Keiichi Browse this author →KAKEN DB |
| Keywords: | alien species | | carnivore | | Crustacea | | ecology | | feeding behavior | | non-indigenous species |
| Issue Date: | Jun-2022 |
| Publisher: | Zoological Society of Japan |
| Journal Title: | Zoological Science |
| Volume: | 39 |
| Issue: | 3 |
| Start Page: | 270 |
| End Page: | 274 |
| Publisher DOI: | 10.2108/zs210122 |
| Abstract: | Although isopods in Anthuroidea are predators, there is little information on their predatory behavior. In this study, we investigated predation by the paranthurid Paranthura japonica, which was originally described from northern Japan but has recently been reported as an invasive alien species in western America and Europe. Six crustacean species (two isopods, two amphipods, and two tanaidaceans, one of which does not co-occur with P. japonica in the wild) and one pycnogonid species were used as prey candidates in our experiments. Paranthura japonica preyed on all candidate species except the pycnogonid, grasping them with its falciform pereopods, inserting its piercing-type mouthparts, and sucking out the internal contents of the prey. Cannibalism or scavenging was observed when several P. japonica individuals were put in a single aquarium. This study showed that P. japonica is an aggressive predator; it consumed various crustaceans, including one it never encounters in the wild. Our results suggest that P. japonica will have a high impact on alien ecosystems it invades as a predator on native crustaceans. Cytochrome c oxidase subunit (COI) nucleotide sequences for putative P. japonica from Oshoro, Japan and a topotypic individual from Muroran confirmed that the population we dealt with was P. japonica. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/89762 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 角井 敬知
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