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. 2018 Mar 2:5:4.
doi: 10.3389/fvets.2018.00004. eCollection 2018.

Consumption of Big Game Remains by Scavengers: A Potential Risk as Regards Disease Transmission in Central Spain

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Consumption of Big Game Remains by Scavengers: A Potential Risk as Regards Disease Transmission in Central Spain

Ricardo Carrasco-Garcia et al. Front Vet Sci. .

Abstract

Understanding the role that facultative scavenger species may play in spreading infectious pathogens, and even becoming reservoirs for humans, domestic and wild ungulates or, on the contrary, preventing the spread of disease, requires a prior understanding of the pattern of carrion scavenging in specific scenarios. The objectives of this paper are (i) to describe the guild of vertebrate scavengers and (ii) to study the species-specific, habitat, and management-related factors involved in the usage of gut piles in South Central Spain (SCS), a tuberculosis (TB) endemic area. We used camera trapping at 18 hunting piles on seven hunting estates. A total of eight bird and five mammal taxa were detected at the remains of hunting piles. The most frequently detected species in terms of number of gut piles visited (78%) and scavenged (61%) was the red fox Vulpes vulpes, followed by the griffon vulture Gyps fulvus (56% as regards both presence and scavenging) and the raven Corvus corax (61 and 39% as regards presence and scavenging, respectively). We evidenced that griffon vultures accounted for most of the scavenging activity in open habitats, while facultative mammal scavengers, red fox, and wild boar Sus scrofa made the highest contribution to scavenging in vegetation-covered habitats. In the case of wild boar, the gut piles deposited during the evening and night favored higher rates of scavenging, while the opposite pattern was observed for griffons. Overall, our findings suggest that when disposing of hunting remains in areas of risk as regards disease transmission it is particularly important to consider the access that facultative mammals, and especially wild boar, have to material, while the presence of the resource needs to be safeguarded to protect specialist scavengers of conservation value. These results are of particular relevance in the case of wild boar in the current context of re-emerging TB and emerging African swine fever (ASF) in Europe.

Keywords: African swine fever; hunting remains; red fox; scavenging; tuberculosis; vulture; wild boar.

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Figures

Figure 1
Figure 1
Maps illustrating the sampling sites (white dots). The capture effort (average yearly value of animals shot per hunting event and hunting estate) is represented, which equates to the individual big game offal generated for red deer (A) and wild boar (B) at municipality level, respectively (red deer hunted in 57% of the province area, wild boar in 73%) in the province of Ciudad Real (Autonomous Region of Castilla-La Mancha, South Central Spain, location is depicted in the inset). More details on the origin of the data can be seen in Vicente et al. (22).
Figure 2
Figure 2
Circadian activity for the principal scavenger species calculated by means of picture frequency in each hour: (A) griffon vulture, (B) monk vulture, (C) raven, (D) magpie, (E) azure-winged magpie, (F) wild boar, and (G) red fox.
Figure 3
Figure 3
Average predicted probability of scavenging (and 95% CI SE) from the Generalized Linear Mixed Models for the contribution made by scavenging to the total per pile for the main species as a function of the habitat (A,B) the period of day during which the hunting remains were deposited. Please note that these values were “corrected” by other variables incorporated into the model, such as the estate.

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References

    1. Selva N, Fortuna MA. The nested structure of a scavenger community. Proc Biol Sci (2007) 274:1101–8.10.1098/rspb.2006.0232 - DOI - PMC - PubMed
    1. Corner LA. The role of wild animal populations in the epidemiology of tuberculosis in domestic animals: how to assess the risk. Vet Microbiol (2006) 112:303–12.10.1016/j.vetmic.2005.11.015 - DOI - PubMed
    1. Jennelle CS, Samuel MD, Nolden CA, Berkley EA. Deer carcass decomposition and potential scavenger exposure to chronic wasting disease. J Wild Manage (2009) 73:655–62.10.2193/2008-282 - DOI
    1. Pozio E. The opportunistic nature of Trichinella––exploitation of new geographies and habitats. Vet Parasitol (2013) 194:128–32.10.1016/j.vetpar.2013.01.037 - DOI - PubMed
    1. Gortazar C, Acevedo P, Ruiz-Fons F, Vicente J. Disease risks and overabundance of game species. Eur J Wild Res (2006) 52:81–7.10.1007/s10344-005-0022-2 - DOI

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