The Interactions between Some Free-Ranging Animals and Agriculture—A Review
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When humans began interfering with the environment to produce food, some free-ranging animal species adapted to live on typical farmland, sometimes choosing it as their main habitat. They use it on the basis of symbiosis or as a pest. The animals affect farms in different ways, and the same concerns farms affecting animals. There are negative, from a human perspective, as well as positive aspects of this interaction. The aim of this study was to review and propose the solutions to reconcile these two factors, agriculture and wildlife, using Poland as an example. Two major problems were observed: the negative impact of agriculture on the occurrence or abundance of certain species, and wildlife damage caused mainly by wild boars (Sus scrofa) and Cervidae. The most important issue for agricultural economy is the strict control and limitation of the wild boar population, while the farmer’s approach to cultivation and the environment are important for the wildlife. For years, man has been undertaking various activities using and subordinating elements of the environment, and each even small interference in the system that creates a harmony will have far-reaching consequences.Keywords:
Wild boar
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Habitat expansion of wild boar (Sus scrafa) cross the waters in Island See is studied based on interview research conducted in all residential islands in Matsuyama City, Ehime Pref., Japan. Wild boar has immigrated around 1999 from the direction of Kashima Island, Hiroshima Pref. in the north. In A group islands where far from original habitat, sporadic damage phase exists for 6-8 years. After damage increase phase of 3-4 years, grate damage phase starts from 2009. In B group islands where near from original habitat, sporadic damage phase relatively short. In other islands far from original habitat and with very small area, wild boar has immigrated but not colonized. Gogo Island is now in sporadic damage phase, but predicted to go into damage increase phase in the near future. It is effective solution of wildlife-human conflict to make opportunity for local people getting information and learning opportunity about wild boar, as well as to monitor wild boar habitat expansion on the edge of original habitat, resulting in effective control of wild boar habitat.
Wild boar
BOAR
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African swine fever (ASF) was first detected in Lithuania, Latvia, and Estonia in 2014 and has since been circulating in the Baltic States with a similar epidemiological course characterized by persistence of the disease in the wild boar population and occasional spill-over infections in domestic pigs. The aim of the present study was to evaluate surveillance data on ASF in wild boar from the three countries to improve our understanding of the course of the disease. ASF surveillance and wild boar population data of the countries were analyzed. In all three countries, a decrease in the prevalence of ASF virus-positive wild boar was observed over time. Although somewhat delayed, an increase in the seroprevalence was seen. At the same time, the wild boar population density decreased significantly. Towards the end of the study period, the wild boar population recovered, and the prevalence of ASF virus-positive wild boar increased again, whereas the seroprevalence decreased. The decreasing virus prevalence has obviously led to virus circulation at a very low level. Together with the decreasing wild boar population density, the detection of ASF-infected wild boar and thus ASF control has become increasingly difficult. The course of ASF and its continuous spread clearly demonstrate the necessity to scrutinize current ASF surveillance and control strategies fundamentally and to consider new transdisciplinary approaches.
Wild boar
Seroprevalence
African Swine Fever
BOAR
Domestic pig
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Describes natural history profiles of New England wildlife species and their associations with forested and nonforested habitats. Provides a database that will enable forest managers or wildlife biologists to describe the species or groups to be found in a given habitat. Comprised of 14 pdf files.
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Background African swine fever (ASF) is a hemorrhagic fever occurring in wild boars (Sus scrofa) and domestic pigs. The epidemic situation of ASF in South Korean wild boars has increased the risk of ASF in domestic pig farms. Although basic reproduction number (R0) can be applied for control policies, it is challenging to estimate the R0 for ASF in wild boars due to surveillance bias, lack of wild boar population data, and the effect of ASF-positive wild boar carcass on disease dynamics. Objectives This study was undertaken to estimate the R0 of ASF in wild boars in South Korea, and subsequently analyze the spatiotemporal heterogeneity. Methods We detected the local transmission clusters using the spatiotemporal clustering algorithm, which was modified to incorporate the effect of ASF-positive wild boar carcass. With the assumption of exponential growth, R0 was estimated for each cluster. The temporal change of the estimates and its association with the habitat suitability of wild boar were analyzed. Results Totally, 22 local transmission clusters were detected, showing seasonal patterns occurring in winter and spring. Mean value of R0 of each cluster was 1.54. The estimates showed a temporal increasing trend and positive association with habitat suitability of wild boar. Conclusions The disease dynamics among wild boars seems to have worsened over time. Thus, in areas with a high elevation and suitable for wild boars, practical methods need to be contrived to ratify the control policies for wild boars.
Wild boar
Domestic pig
African Swine Fever
Classical swine fever
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The aim of the present study is to determine the effects of wild boar (Sus scrofa) on farming activities in Samsun, Turkey. The presence and damages of wild boar was monitored by means of direct and indirect observations. Wild boar was the main cause of the decision made by farmers, concerning which area they want to cultivate. Intensity of damage was high in areas close to the woodland areas. Crops losses, from areas close to woodland (up to 100 m), contributed to more than 60% of the total losses for each crop. Some farmed areas, especially those areas located in the nearest woodland, were given up to agricultural activities due to the wild boar damages, particularly in the last five years. Before this date, wild boar population has a very low rate and damages were only one or two reports in one farming season. Wild boar population was determined by the point counts method. Population size of wild boar was counted as 64 individuals and wild boar density was determined as 7.11 individual 100 ha-1. This case study showed that wild boar damages were the main subject that shaped farming activities in the region. Key words: Wild boar, crop damages, Sus scrofa, Turkey.
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BOAR
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Aims: Transmission of hepatitis E virus (HEV) from wild boar to humans has been reported, particularly from Japan. We attempted to clarify this issue. Methods: We assessed the IgG class antibodies against HEV (anti‐HEV) in serum samples taken from 406 boar living in the Ehime area of western Japan from 2001 to 2004, of which 392 were captured in the wild (wild‐caught boar) and 14 had been kept in a breeding farm (bred boar). Results: Anti‐HEV positive rate in the bred boar (10/14, 71.4%) was significantly higher than in the wild‐caught boar (100/392, 25.5%) ( P < 0.001). Of the 392 wild‐caught boar, 12 (3.1%) were positive for HEV‐RNA, 10 of which were then subjected to phylogenetic analyses by sequencing an 821‐nt fragment within ORF1. All the 10 isolates segregated to genotype 3, and eight of them were mutually related to form a cluster. All the eight HEV isolates in this cluster were from the wild‐caught boar living in one and the same habitat within the studied area, while the other two independent isolates were from different regions. Conclusion: HEV infection is endemic in wild boar in the Ehime area, and we should regard the wild boar as an important reservoir of HEV.
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Hepatitis E Virus
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A detailed understanding of environmental risk factors for African swine fever (ASF) in wild boar will be not only essential for risk assessments but also for timely and spatially informed allocation of resources in order to manage wild boar-targeted ASF control measures efficiently. Here, we review currently known environmental risk factors that can influence the occurrence of ASF virus infection in wild boar when compared to disease occurrence in wild boar of a non-exposed reference scenario. Accordingly, the exposure of wild boar to environmental risk factors related to (1) climate, (2) land cover, (3) human activity, (4) wild boar and (5) ASF were evaluated. As key environmental risk factors in this review, increased ASF occurrence in wild boar was associated with seasonal patterns, forest coverage, presence of water, human presence, farming activities, wild boar density and ASF nearness. The review highlights inconsistencies in some of these risk factor associations with disease detection in space and time and may provide valuable insights for the investigation of ASF transmission dynamics. The examined risk information was applied to consider potential improvements of the ASF control strategy in wild boar regarding disease surveillance, hunting, wild boar carcass searches and ASF barrier implementation.
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African Swine Fever
BOAR
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African swine fever (ASF) in wild boar remains a threat for the global pig industry. Therefore, surveillance is of utmost importance, not only to control the disease but also to detect new introductions as early as possible. Passive surveillance is regarded as the method of choice for an effective detection of ASF in wild boar populations. However, the relevance of wild boar killed through road traffic accidents (RTA) for passive surveillance seems to be unclear. Using comprehensive ASF wild boar surveillance data from Estonia and Latvia, the prevalence of ASF-infected wild boar was calculated and the probability of infection as measured by PCR compared for animals that were hunted, found dead, shot sick or killed in a RTA. The number of samples originating from wild boar killed in a RTA was low and so was the ASF prevalence in these animals. However, the reasons for this low number of RTA animals remain unknown. Therefore, we recommend to sample wild boar killed in a RTA to a greater extent, also to explore, if this approach can increase the detection probability, and to avoid missing disease introduction.
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African Swine Fever
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The introduction of genotype II African swine fever (ASF) virus, presumably from Africa into Georgia in 2007, and its continuous spread through Europe and Asia as a panzootic disease of suids, continues to have a huge socio-economic impact. ASF is characterized by hemorrhagic fever leading to a high case/fatality ratio in pigs. In Europe, wild boar are especially affected. This review summarizes the currently available knowledge on ASF in wild boar in Europe. The current ASF panzootic is characterized by self-sustaining cycles of infection in the wild boar population. Spill-over and spill-back events occur from wild boar to domestic pigs and vice versa. The social structure of wild boar populations and the spatial behavior of the animals, a variety of ASF virus (ASFV) transmission mechanisms and persistence in the environment complicate the modeling of the disease. Control measures focus on the detection and removal of wild boar carcasses, in which ASFV can remain infectious for months. Further measures include the reduction in wild boar density and the limitation of wild boar movements through fences. Using these measures, the Czech Republic and Belgium succeeded in eliminating ASF in their territories, while the disease spread in others. So far, no vaccine is available to protect wild boar or domestic pigs reliably against ASF.
Wild boar
African Swine Fever
BOAR
Domestic pig
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