Unsuspicious immigrant or ecological threat:
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1 Unsuspicious immigrant or ecological threat: a long-term fieldwork study on the introduced raccoon in Germany R.Vitt
2 Outline raccoon settlement and current situation in Germany applied research on raccoons: Projekt Waschbär topics of research selected results
3 Taxonomy class: mammals order:carnivora superfamily: musteloidea family: Ailuridae (red panda) Mephitidae (skunks) Mustelidae (weasel family) Procyonidae (procyonids) 6 genus, 13 species I. Bartussek
4 Taxonomy I. Bartussek
5 Taxonomy raccoons 1 genus (Procyon), 3 species (Hunter & Barrett 2012) Procyon lotor Procyon cancrivorus Procyon pygmaeus Zeichnungen: Priscilla Barret
6 Geographic range
7 Geographic range
8 Geographic range Hunting bag development in Germany shot animals / year I. Bartussek 1934: first documented succesfull abandonment in north-hesse (Edersee) 1954: hunting starts in Germany
9 Characteristics I. Bartussek
10 Characteristics I. Bartussek Mikulov,
11 Characteristics I. Bartussek
12 Characteristics I. Bartussek I. Bartussek
13 Characteristics I. Bartussek
14 Current situation in Germany - raccoons are indigenous according to the Federal Nature Conservation Act (BNatschG 5) - controversial and highly emotional discussion concerning the impacts of raccoon settlement in Germany - raccoons are expected to be problematic: 3 levels of impact I. Bartussek
15 Current situation in Germany economic effects I. Bartussek I. Bartussek I. Bartussek
16 Current situation in Germany economic effects hygienic relevance I. Bartussek I. Bartussek
17 Current situation in Germany economic effects hygienic relevance ecological effects I. Bartussek I. Bartussek I. Bartussek
18 Current situation in Germany - raccoons are still among the least investigated carnivores in Europe - better founded knowledge is essential in order to evaluate potential impacts lack of knowledge
19 Research on raccoons in Germany 4 research studies Society for Wildlife and Nature Conservation (GWN)
20 Research on raccoons in Germany Müritz National Park Solling Bad Karlshafen Kassel
21 Projekt Waschbär Müritz National Park R. Vitt R. Vitt
22 Projekt Waschbär study area optimal habitat for Central Europe highest density ever messured in Europe for a natural habitat until now (6-8 individuals/km²) R. Vitt area under investigation: 60 km²
23 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour)
24 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation)
25 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families)
26 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection)
27 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection) 5. population density (capture-mark-recapture, camera traps) R. Vitt
28 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection) 5. population density (capture-mark-recapture, camera traps) 6. population structure (structure of age groups, sex ratio, phenotypic characteristics)
29 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection) 5. population density (capture-mark-recapture, camera traps) 6. population structure (structure of age groups, sex ratio, phenotypic characteristics) 7. epidemiology & death investigation (histo-pathologic & serologic tests)
30 Projekt Waschbär topics of research 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection) 5. population density (capture-mark-recapture, camera traps) 6. population structure (structure of age groups, sex ratio, phenotypic characteristics) 7. epidemiology & death investigation (histo-pathologic & serologic tests) 8. landscape genetics (impacts of spacial movement patterns)
31 Projekt Waschbär data basis VHF- telemetry
32 Projekt Waschbär data basis VHF- telemetry expanding radio-collars R. Vitt
33 Projekt Waschbär data basis march 2006 november 2011: raccoon captures 145 different individuals 69 fitted with radio-collars (23 ad. ; 28 ad. ; 18 juveniles) localizations ( by day, at night) pictures from camera traps (5365 trap nights)
34 Projekt Waschbär data basis nearly all animals in the study area under telemetric control accurately defined kinship relations through moleculobiological analyses (highly variable microsatellites)
35 Projekt Waschbär selected results 1. spatial use (home-range sizes, den sites, habitat use, dispersal behaviour) 2. feeding ecology/parasitology (food spectrum, endoparasite infestation) 3. social behaviour (interaction analysis, relationships, ethology of mother families) 4. reproduction biology (mating- and cubbing season, litter size, parentship, MHC-dependant mate selection) 5. population density (capture-mark-recapture, camera traps) 6. population structure (structure of age groups, sex ratio, phenotypic characteristics) 7. epidemiology & death investigation (histo-pathologic & serologic tests) 8. landscape genetics (impacts of spacial movement patterns)
36 Projekt Waschbär doctoral thesis - main area of interest: what do the animals live off and does this affect indegenious species?
37 Projekt Waschbär doctoral thesis - common feeding analysis are not sufficient for statements concerning the local ecological impact of raccoons Foto: R. Vitt
38 Projekt Waschbär doctoral thesis - common feeding analysis are not sufficient for statements concerning the local ecological impact of raccoons doctoral thesis: quantifying of data and intersection with local offer (n=1285 samples from the Müritz National Park) Foto: R. Vitt
39 Projekt Waschbär doctoral thesis A) feeding ecology investigation B) determination of a raccoonspecific conversion factor based on feeding trials feces from captured animals feeding trials feces from latrines C) scat analysis in respect of Baylisascaris procyonis conversion factor analysis of food content parasite eggs feeding ecology B. procyonis identification n=1285 fecal samples
40 Projekt Waschbär doctoral thesis A) feeding ecology investigation B) determination of a raccoonspecific conversion factor based on feeding trials feces from captured animals feeding trials feces from latrines C) scat analysis in respect of Baylisascaris procyonis conversion factor analysis of food content parasite eggs feeding ecology B. procyonis identification n=1285 fecal samples
41 Projekt Waschbär feeding ecology - fecal samples (n=1285) were collected from 90 different latrines between first results only relate to the rates of occurrence biomass data remaining (even more informative)
42 Projekt Waschbär feeding ecology Müritz National Park (n=1285) 44% 34% plants vertebrates invertebrates 22%
43 Projekt Waschbär feeding ecology invertebrates (n = 1232; 44 %) insects 26% molluscs 0% 2% 29% 43% crayfish others earthworms Naturfotografen-forum.de
44 Projekt Waschbär feeding ecology plants (n = 961; 34 %) 1% 15% fruit 6% 37% fruit of trees nuts 41% corn others
45 Projekt Waschbär feeding ecology vertebrates (n = 613; 22 %) 0% 1% 19% 12% 47% 21% birds amphibians reptiles fish small mammals others
46 Projekt Waschbär feeding ecology - raccoons are omnivorous and have an opportunistic dietary behaviour they can easily adapt to the local range of available food - raccoons are very variable in their diet but prefer food within wetland habitats and food which is easily available in large amounts
47 Projekt Waschbär feeding ecology A) feeding ecology investigation B) determination of a raccoonspecific conversion factor based on feeding trials feces from captured animals feeding trials feces from latrines C) scat analysis in respect of Baylisascaris procyonis conversion factor analysis of food content parasite eggs feeding ecology B. procyonis identification n=1285 fecal samples
48 Projekt Waschbär feeding ecology conversion factor: proportion of fresh weight of food and the dry weight of the faeces how much of the food is finally defecated? specific value will be a factor in the calculation of the biomass Feeding trials with encountered animals - 2 periods: summer & autumn feeding of 15 different components (concurrent with the food in the wild)
49 Projekt Waschbär feeding ecology sample calculation for molluscs: determined biomass in the sample = 25 % x 4,74 (calculated conversion factor) dry mass = 3,9 g corrected biomass (freshly consumed) = 18,49 g
50 Projekt Waschbär doctoral thesis A) feeding ecology investigation B) determination of a raccoonspecific conversion factor based on feeding trials feces from captured animals feeding trials feces from latrines C) scat analysis in respect of Baylisascaris procyonis conversion factor analysis of food content parasite eggs feeding ecology B. procyonis identification n=1285 fecal samples
51 Projekt Waschbär parasitology 74 % % % 1995 microscope image of an infectous Baylisascaris procyonis egg (size 50 µm) Lux & Priemer 1995 Gey 1998 Gunnesch 2004 Winter 2005
52 Projekt Waschbär parasitology 0 % 2014 current investigation from n=400 faeces samles from the Müritz National Park 74 % % 2005 Lux & Priemer 1995 Gey 1998 Gunnesch 2004 Winter 2005
53 Current situation economic effects hygienic relevance ecological effects I. Bartussek I. Bartussek I. Bartussek
54 Current situation - economic effects - occasionally costly damages to private house and garden
55 Current situation - economic effects - occasionally costly damages to private house and garden no appreciable economic effects (e.g. crop damages)
56 Current situation - hygienic relevance epidemiological status in Europe: - no host animal for fox tapeworm and trichina - does not play a major role in the european epidemiology of rabies (VOSS et al. 2012) - no important vector of scabies - can be a carrier of canine distember viruses (CDV) (Rentería-Solís et al. 2014) - only known considerable zoonosis: raccoon roundworm
57 Current situation - hygienic relevance epidemiological status in Europe: - no host animal for fox tapeworm and trichina - does not play a major role in the european epidemiology of rabies (VOSS et al. 2012) - no important vector of scabies - can be a carrier of canine distember viruses (CDV) (Rentería-Solís et al. 2014) - only known considerable zoonosis: raccoon roundworm low estimated epidemiologically risk in Germany
58 Current situation ecological effects - so far no serious predation pressure verifiable - a threat of autochthonous species is not looming ahead - local negative effects, especially in suboptimal habitats, can not be ruled out
59 Current situation - ecological effects - so far no serious predation pressure verifiable - a threat of autochthonous species is not looming ahead - local negative effects, especially in suboptimal habitats, can not be ruled out all current scientific studies indicate no serious ecological impact for close to nature habitat
60 Projekt Waschbär prospects - research will be finished in currently 3 sub-projects in process
61
62 Thank you for your attention I. Bartussek
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