title: Competing invaders: Performance of two Anguillicola species in Lake Bracciano.
abstract: Anguillicola crassus is one of the most successful parasitic invasive species as it has spread from its original habitat in East Asia throughout the world and has acquired five new eel host species in the course of its invasion within the last three decades. Records from an Italian lake indicate that this species has even displaced an established population of its close relative A. novaezelandiae originating from New Zealand. In order to analyze the reasons for its high invasive potential, this review highlights recent studies, which substantiate the selective advantages of A. crassus over A. novaezelandiae. Laboratory infection experiments revealed that A. crassus features a less synchronized development compared to A. novaezelandiae in the European eel, which enables this species to emit eggs over a longer period of time. Differences in the time period required for first egg output and in the maturation process of second stage larvae in intermediate hosts could also be detected, which may lead to differences in infection potential. Finally, microsatellite analyses have shown that hybridization processes are possible, but might only occur between A. crassus males and A. novaezelandiae females. Taken as a whole, the sum of minor selective advantages and differences in life cycle traits could have considerably contributed to a replacement of one species by the other.
authors.affiliation: Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141 Essen, Germany.
authors.forename: K C
authors.initials: KC
authors.lastname: Dangel
authors.affiliation: Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141 Essen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Keppel
authors.affiliation: Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141 Essen, Germany.
authors.forename: T T Y
authors.initials: TT
authors.lastname: Le
authors.affiliation: Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141 Essen, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Grabner
authors.affiliation: Department of Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstrasse 5, 45141 Essen, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Sures
keywords: Anguilla anguilla; Anguillicola crassus; Anguillicola novaezelandiae; Invasive species
references.citation: Trans R Soc Trop Med Hyg. 1997 Nov-Dec;91(6):664-5
references.pmid: 9509173
references.citation: J Helminthol. 2006 Jun;80(2):99-128
references.pmid: 16768855
references.citation: Trends Ecol Evol. 2001 Apr 1;16(4):199-204
references.pmid: 11245943
references.citation: Folia Parasitol (Praha). 1994;41(3):203-8
references.pmid: 7883252
references.citation: Parasit Vectors. 2012 Oct 30;5:244
references.pmid: 23111012
references.citation: Acta Biol Hung. 1999;50(1-3):161-73
references.pmid: 10574437
references.citation: J Fish Dis. 2014 Oct;37(10):921-4
references.pmid: 24422641
references.citation: Dis Aquat Organ. 1998 Nov 30;34(3):217-22
references.pmid: 9925427
references.citation: Parasitology. 1996 Feb;112 ( Pt 2):233-8
references.pmid: 8851864
references.citation: Parassitologia. 1982 Dec;24(2-3):139-44
references.pmid: 6926929
references.citation: BMC Evol Biol. 2013 Apr 08;13:78
references.pmid: 23566258
references.citation: Folia Parasitol (Praha). 1988;35(2):125-46
references.pmid: 3169643
references.citation: Science. 2004 Apr 9;304(5668):209-11
references.pmid: 15073357
references.citation: Nature. 2003 Feb 6;421(6923):628-30
references.pmid: 12571595
references.citation: Dis Aquat Organ. 2000 Jan 14;39(2):121-34
references.pmid: 10715817
references.citation: J Fish Dis. 2007 Jun;30(6):319-34
references.pmid: 17498176
references.citation: Parasitol Res. 2013 Apr;112(4):1623-30
references.pmid: 23388731
references.citation: J Helminthol. 2006 Jun;80(2):129-36
references.pmid: 16768856
references.citation: BMC Evol Biol. 2012 May 04;12:60
references.pmid: 22559142
references.citation: Ecology. 2009 Aug;90(8):2047-56
references.pmid: 19739367
references.citation: Parasitology. 2011 Sep;138(10):1278-84
references.pmid: 21767436
references.citation: Dis Aquat Organ. 1998 Jun 19;33(2):143-9
references.pmid: 9722403
references.citation: Acta Vet Hung. 1994;42(1):87-97
references.pmid: 7810405
references.citation: Parasitology. 2013 Dec;140(14):1831-6
references.pmid: 23953638
references.citation: Parasitology. 2004 Oct;129(Pt 4):491-6
references.pmid: 15521638
references.citation: Parasitol Res. 2008 May;102(6):1343-50
references.pmid: 18288491
references.citation: Parasitology. 2008 Apr;135(5):633-40
references.pmid: 18302804
references.citation: Parasitology. 2008 Dec;135(14):1707-16
references.pmid: 18940021
references.citation: Parasitology. 1999 Mar;118 ( Pt 3):289-96
references.pmid: 10205805