| prevalence of trichinella larvae and extra-intestinal nematodes in norwegian red foxes (vulpes vulpes). | a survey of the parasitic fauna of the norwegian red fox (vulpes vulpes) population was carried out in 1994/1995 and 2002-2005. all foxes were killed during the licensed hunting season from october to april and, in total, 393 animals from all regions of the country were examined. the present study details the results of extra-intestinal nematode and trichinella larvae examinations. all individuals were examined for trichinella, using routine digestion methods. parasitological examination of the ... | 2006 | 16378689 |
| long-term study of sarcoptes scabiei infection in norwegian red foxes (vulpes vulpes) indicating host/parasite adaptation. | the red fox (vulpes vulpes) population, in norway, was naïve to sarcoptes scabiei prior to the late 1970s when this parasite was first recorded and a still ongoing epidemic started. during the course of this protracted epidemic some degree of host/parasite adaptation, with the occurrence of healthy antibody positive foxes, might be expected. in the present study the prevalence of sarcoptic mange and serologically identified s. scabiei exposure was investigated in 363 norwegian red foxes, shot by ... | 2008 | 18586406 |
| serological detection of anti-trichinella antibodies in wild foxes and experimentally infected farmed foxes in norway. | trichinella surveillance in wildlife has relied on the detection of muscle larvae using digestion techniques. serology has been proposed as more suitable for large-scale epidemiological studies in wildlife. in this study, 328 individual sera from wild red foxes and 16 sera from experimentally infected farmed foxes were serologically tested with both excretory/secretory antigen (e/s) and the synthetic beta-tyvelose glycan antigen, in indirect elisa tests. the wild red foxes (vulpes vulpes) had pr ... | 2009 | 19380206 |
| combining information from surveys of several species to estimate the probability of freedom from echinococcus multilocularis in sweden, finland and mainland norway. | the fox tapeworm echinococcus multilocularis has foxes and other canids as definitive host and rodents as intermediate hosts. however, most mammals can be accidental intermediate hosts and the larval stage may cause serious disease in humans. the parasite has never been detected in sweden, finland and mainland norway. all three countries require currently an anthelminthic treatment for dogs and cats prior to entry in order to prevent introduction of the parasite. documentation of freedom from e. ... | 2011 | 21314948 |
| the importance of marine vs. human-induced subsidies in the maintenance of an expanding mesocarnivore in the arctic tundra. | 1. most studies addressing the causes of the recent increases and expansions of mesopredators in many ecosystems have focused on the top-down, releasing effect of extinctions of large apex predators. however, in the case of the northward expansion of the red fox into the arctic tundra, a bottom-up effect of increased resource availability has been proposed, an effect that can counteract prey shortage in the low phase of the multi-annual rodent cycle. resource subsidies both with marine and with ... | 2011 | 21477201 |
| predicting the potential demographic impact of predators on their prey: a comparative analysis of two carnivore-ungulate systems in scandinavia. | 1. understanding the role of predation in shaping the dynamics of animal communities is a fundamental issue in ecological research. nevertheless, the complex nature of predator-prey interactions often prevents researchers from modelling them explicitly. 2. by using periodic leslie-usher matrices and a simulation approach together with parameters obtained from long-term field projects, we reconstructed the underlying mechanisms of predator-prey demographic interactions and compared the dynamics o ... | 2011 | 22077484 |