Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida)
The siphonostomatoid copepod Caligus undulatus Shen & Li, 1959 has been widely reported from plankton samples obtained from neritic and oceanic waters off coasts of the Indo-West Pacific and Atlantic Oceans. Until now, its fish host has remained unknown. This copepod belongs to an intriguing gro...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/25939/1/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%20.pdf https://eprints.ums.edu.my/id/eprint/25939/2/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%201.pdf |
| _version_ | 1796910437967593472 |
|---|---|
| author | Susumu Ohtsuka Masaki Nawata Yusuke Nishida Masato Nitta Katsushi Hirano Kenta Adachi Yusuke Kondo Balu Alagar Venmathi Maran Eduardo Suárez-Morales |
| author_facet | Susumu Ohtsuka Masaki Nawata Yusuke Nishida Masato Nitta Katsushi Hirano Kenta Adachi Yusuke Kondo Balu Alagar Venmathi Maran Eduardo Suárez-Morales |
| author_sort | Susumu Ohtsuka |
| collection | UMS |
| description | The siphonostomatoid copepod Caligus undulatus Shen & Li, 1959 has been widely reported from plankton samples obtained from neritic and oceanic waters off coasts of the Indo-West Pacific and Atlantic Oceans. Until now, its fish host has remained unknown. This copepod belongs to an intriguing group of congeners that, despite being part of a chiefly parasitic group, are consistently found as zooplankters. Quite unexpectedly, in October 2019, a fish host of C. undulatus was discovered in the Seto Inland Sea, Japan—namely, the Japanese sardinella Sardinella zunasi (Bleeker, 1854). Both juvenile (chalimus) and adult individuals of this caligid were observed as parasites of the fish host. The discovery suggests that the species has an alternative life cycle as previously proposed for other purportedly ‘planktonic’ congeners and might frequently switch hosts during the adult stage. Thus, the C. undulatus group is newly proposed as a species group in the genus, in which five species are known as planktonic. Some hypotheses on the modified life cycle of caligids also briefly discussed. |
| first_indexed | 2024-03-06T03:04:27Z |
| format | Article |
| id | ums.eprints-25939 |
| institution | Universiti Malaysia Sabah |
| language | English English |
| last_indexed | 2024-03-06T03:04:27Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ums.eprints-259392020-09-11T06:48:50Z https://eprints.ums.edu.my/id/eprint/25939/ Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) Susumu Ohtsuka Masaki Nawata Yusuke Nishida Masato Nitta Katsushi Hirano Kenta Adachi Yusuke Kondo Balu Alagar Venmathi Maran Eduardo Suárez-Morales Q Science (General) QH Natural history The siphonostomatoid copepod Caligus undulatus Shen & Li, 1959 has been widely reported from plankton samples obtained from neritic and oceanic waters off coasts of the Indo-West Pacific and Atlantic Oceans. Until now, its fish host has remained unknown. This copepod belongs to an intriguing group of congeners that, despite being part of a chiefly parasitic group, are consistently found as zooplankters. Quite unexpectedly, in October 2019, a fish host of C. undulatus was discovered in the Seto Inland Sea, Japan—namely, the Japanese sardinella Sardinella zunasi (Bleeker, 1854). Both juvenile (chalimus) and adult individuals of this caligid were observed as parasites of the fish host. The discovery suggests that the species has an alternative life cycle as previously proposed for other purportedly ‘planktonic’ congeners and might frequently switch hosts during the adult stage. Thus, the C. undulatus group is newly proposed as a species group in the genus, in which five species are known as planktonic. Some hypotheses on the modified life cycle of caligids also briefly discussed. 2020 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/25939/1/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%20.pdf text en https://eprints.ums.edu.my/id/eprint/25939/2/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%201.pdf Susumu Ohtsuka and Masaki Nawata and Yusuke Nishida and Masato Nitta and Katsushi Hirano and Kenta Adachi and Yusuke Kondo and Balu Alagar Venmathi Maran and Eduardo Suárez-Morales (2020) Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida). Biodiversity Data Journal, 8. pp. 1-11. https://doi.org/10.3897/BDJ.8.e52271 |
| spellingShingle | Q Science (General) QH Natural history Susumu Ohtsuka Masaki Nawata Yusuke Nishida Masato Nitta Katsushi Hirano Kenta Adachi Yusuke Kondo Balu Alagar Venmathi Maran Eduardo Suárez-Morales Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title | Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title_full | Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title_fullStr | Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title_full_unstemmed | Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title_short | Discovery of the fish host of the ‘planktonic’ caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida) |
| title_sort | discovery of the fish host of the planktonic caligid caligus undulatus shen li 1959 crustacea copepoda siphonostomatoida |
| topic | Q Science (General) QH Natural history |
| url | https://eprints.ums.edu.my/id/eprint/25939/1/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%20.pdf https://eprints.ums.edu.my/id/eprint/25939/2/Discovery%20of%20the%20fish%20host%20of%20the%20%E2%80%98planktonic%E2%80%99%20caligid%20Caligus%20undulatus%20Shen%20%26%20Li%2C%201959%201.pdf |
| work_keys_str_mv | AT susumuohtsuka discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT masakinawata discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT yusukenishida discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT masatonitta discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT katsushihirano discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT kentaadachi discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT yusukekondo discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT balualagarvenmathimaran discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida AT eduardosuarezmorales discoveryofthefishhostoftheplanktoniccaligidcaligusundulatusshenli1959crustaceacopepodasiphonostomatoida |