Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

The impact of introduced hosts on parasite transmission: opisthorchiid infections in American mink (Neovison vison)

Sherrard-Smith, Eleanor, Chadwick, Elizabeth Anna and Cable, Joanne 2015. The impact of introduced hosts on parasite transmission: opisthorchiid infections in American mink (Neovison vison). Biological Invasions 17 (1) , pp. 115-122. 10.1007/s10530-014-0709-y

[img]
Preview
PDF - Published Version
Available under License Creative Commons Attribution.

Download (255kB) | Preview

Abstract

Introduced animals may be considered at an advantage over native competitors because they have escaped natural parasites. In some cases however, generalist parasites in a novel environment can use introduced species as an alternative or reservoir host. This can change the dynamics of parasite populations, with implications for epidemiology. The key factor determining the impact of an alternative host is its ability to maintain a reproductively successful parasite and contribute to the transmission potential of that parasite. The digenean Pseudamphistomum truncatum is found in native otters Lutra lutra in Britain and has been reported in introduced American mink Neovison vison. To investigate whether introduced mink are competent hosts and to ask how mink compare with otters as hosts, we compared parasite prevalence, intensity and fecundity between the two host species in a region where both are common. Although prevalence was not statistically different between otters and mink (48 %, n = 27, compared to 33 %, n = 21 respectively), mean parasite intensity was higher in mink (253 ± 145 standard error parasites/infected host, compared to 46 ± 18 in otters). Parasite fecundity was lower in mink (mean egg count/parasite/host = 622 ± 64) than in otters (1,204 ± 108), and this difference was not confounded by host or parasite size or by intraspecific competition among parasites. Assuming the parasite eggs are equally viable from otters or mink, mink are not only a competent host for P. truncatum, but because of the higher parasite intensity in mink, they can potentially spread c.3 times as many parasite eggs to intermediate hosts, than otters. The naturalisation of mink to new habitats may therefore contribute to trematode infections in native fauna.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Springer
ISSN: 1387-3547
Funders: NERC
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 2 May 2014
Last Modified: 06 Mar 2019 16:06
URI: http://orca.cf.ac.uk/id/eprint/60774

Citation Data

Cited 1 time in Google Scholar. View in Google Scholar

Cited 4 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics