On the origin of Anguillicoloides crassus, the invasive nematode of anguillid eels

0399808 - BC 2014 RIV FI eng J - Článek v odborném periodiku
Lefebvre, F. - Wielgoss, S. - Nagasawa, K. - Moravec, František
On the origin of Anguillicoloides crassus, the invasive nematode of anguillid eels.
Aquatic Invasions. Roč. 7, č. 4 (2012), s. 443-453. ISSN 1798-6540. E-ISSN 1818-5487
Institucionální podpora: RVO:60077344
Klíčová slova: Anguilla * Anguillicola * fish parasite * nativeness * aquaculture * world trade
Kód oboru RIV: EA - Morfologické obory a cytologie
Impakt faktor: 1.136, rok: 2012

The nematode Anguillicoloides crassus is one of the many threats hanging over anguillid eels, now known to infect six Anguilla species worldwide. It was first described in Japan, in 1974, and is commonly thought to natively stem from East Asia. Here our primary objective was to critically evaluate this long-held statement. We first retraced the factual history of this global invader, to later investigate the pros and cons for an East Asian origin. After exploring the alternative scenarios for the joint origin of the two anguillicolid parasites occurring in this area, we concluded that the geographic zone covering the natural range of the local eel A. japonica is still the most probable origin (in the absence of another identified candidate host and area). However, we cannot exclude that A. crassus may have been previously introduced along with exotic eel species, at some early stages of aquaculture in Japan. We call for caution when dealing with the native origin of this and other parasitic invaders in provenance of East Asia, a region to be regarded as a major crossroads for fish and parasites of the world. We finally identified the need for a possible resolution of the question, which includes a deeper sampling effort in the Indo-Pacific zone and the further development of molecular phylogeographic studies of all five anguillicolid species and their hosts.
Trvalý link: http://hdl.handle.net/11104/0227073