AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Recipient region (?) | Country: Ireland LME: 24. Celtic-Biscay Shelf LME sub-region: Celtic seas References: Evans DW, Matthews M A (1999) Anguillicola crassus (Nematoda, Dracunculoidea); first documented record of this swimbladder parasite of eels in Ireland. Journal of Fish Biology, 55(3), 665-668. Comments: First recorded on the Erne River catchment |
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Source region (?) | Unknown References: Evans DW, Matthews M A (1999) Anguillicola crassus (Nematoda, Dracunculoidea); first documented record of this swimbladder parasite of eels in Ireland. Journal of Fish Biology, 55(3), 665-668. Comments: The most probable region is Britain but it may also have arrived from northern continental Europe |
Pathway / Vector (?) | Level of certainty: Possible Pathway: Live food trade Vector: Transported water (Live food trade) References: Evans DW, Matthews M A (1999) Anguillicola crassus (Nematoda, Dracunculoidea); first documented record of this swimbladder parasite of eels in Ireland. Journal of Fish Biology, 55(3), 665-668.Moravec F, Škoríková B (1998) Amphibians and larvae of aquatic insects as new paratenic hosts of Anguillicola crassus (Nematoda: Dracunculoidea) a swimbladder parasite of eels. Diseases of Aquatic Organisms 34: 217-222. Comments: Viviere trucks were transporting eels and refreshing the water in tanks from time to time there is a possibility that the free stage became released. Other possible modes of spread include the occurrence in copepods transported in ballast water or the intermediate stage being transported in paratenic aquatic insect hosts spread as a result of strong easterly winds. |
Habitat type (?) | Estuary Lagoon References: Kennedy CR, Fitch DJ (1990) Colonisation, larval survival and epidemiology of the nematode Anguillicola crassus, parasite in the eel Anguilla anguilla in Britain. Journal of Fish Biology 36: 117-131. Comments: The host occupies a wide habitat range from sheltered inshore waters to the open ocean. The free-living infective second larval parasitic stage stage can survive some months in freshwater. The second larval stage infects copepods which are in turn consumed by eels or other fishes that can act as paratenic hosts. Eels can be infected from the glass eel stage. While the species almost certainly occurs in its host under marine conditions it has not been recovered within these environments on the Irish coast. |
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Wave exposure (?) | Not entered | |
Salinity range (?) | Unknown Comments: Known to occur within eels occurring in freshwater and found in silver eels bound for the ocean migration. Egg hatching declined with increased salinity and survival to the infective stage was greatest in freshwater. |
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Temperature range (?) | Unknown Comments: Presumably can tolerate the temperature ranges its host becomes exposed to. |
Zonation / Substratum (?) | Benthic: Sublittoral beyond photic zone Sublittoral within photic zone Comments: Parasite occurs in a wide range of environments that the host occupies |
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Reproductive duration (?) | Long References: De Charleroy D, Crisez L, Thomas K, Belapire C, Ollevier F (1990)The life cycle of Anguillicola crassus.Diseases of Aquatic Organisms 8:77-84. Comments: The complete life-cycle can take place at 2oC within two months. | |
Reproductive seasonality (?) | Unknown Comments: Presumably this takes place most of the time and egg release is more frequent at higher temperatures. collections of eels from fisheries will have taken place during the winter-time and so should viviere tank replenishments of fresh water have been responsible the infective stage would have been released during this season. |
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Migration pattern (?) | Not relevant Comments: When in the second larval stage it is presumed that the intermediate copepod host would be involved in diurnal migrations, but this has not been shown |
Created by | Dan Minchin |
Last update by | Greta Srėbalienė, 2016-05-25 |