Discovery of the fish host of the 'planktonic' caligid Caligus undulatus Shen & Li, 1959 (Crustacea: Copepoda: Siphonostomatoida)
| Autor: | Kenta Adachi, Yusuke Nishida, Eduardo Suárez-Morales, Balu Alagar Venmathi Maran, Yusuke Kondo, Katsushi Hirano, Susumu Ohtsuka, Masato Nitta, Masaki Nawata |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Siphonostomatoida Caligus Arthropoda Short Communication Hexanauplia 010607 zoology Nephrozoa Zoology Protostomia 010603 evolutionary biology 01 natural sciences Circumscriptional names of the taxon under Sardinella zunasi Crustacea life cycle Juvenile Animalia Bilateria Sardinella lcsh:QH301-705.5 Ecology Evolution Behavior and Systematics Ecology biology fungi plankton Cephalornis Plankton biology.organism_classification Crustacean antagonism lcsh:Biology (General) Notchia Caligus undulatus Ecdysozoa Caligidae Copepod Coelenterata |
| Zdroj: | Biodiversity Data Journal Biodiversity Data Journal, Vol 8, Iss, Pp 1-11 (2020) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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