13 results on '"Game hunting"'
Search Results
2. Satisfaction of Search Can Be Ameliorated by Perceptual Learning: A Proof-of-Principle Study
- Author
-
Erin Park, Fallon Branch, and Jay Hegdé
- Subjects
airport baggage screening ,camouflage-breaking ,deep learning ,game hunting ,military reconnaissance ,pathology ,Biology (General) ,QH301-705.5 - Abstract
When searching a visual image that contains multiple target objects of interest, human subjects often show a satisfaction of search (SOS) effect, whereby if the subjects find one target, they are less likely to find additional targets in the image. Reducing SOS or, equivalently, subsequent search miss (SSM), is of great significance in many real-world situations where it is of paramount importance to find all targets in a given image, not just one. However, studies have shown that even highly trained and experienced subjects, such as expert radiologists, are subject to SOS. Here, using the detection of camouflaged objects (or camouflage-breaking) as an illustrative case, we demonstrate that when naïve subjects are trained to detect camouflaged objects more effectively, it has the side effect of reducing subjects’ SOS. We tested subjects in the SOS task before and after they were trained in camouflage-breaking. During SOS testing, subjects viewed naturalistic scenes that contained zero, one, or two targets, depending on the image. As expected, before camouflage-training, subjects showed a strong SOS effect, whereby if they had found a target with relatively high visual saliency in a given image, they were less likely to have also found a lower-saliency target when one existed in the image. Subjects were then trained in the camouflage-breaking task to criterion using non-SOS images, i.e., camouflage images that contained zero or one target. Surprisingly, the trained subjects no longer showed significant levels of SOS. This reduction was specific to the particular background texture in which the subjects received camouflage training; subjects continued to show significant SOS when tested using a different background texture in which they did not receive camouflage training. A separate experiment showed that the reduction in SOS was not attributable to non-specific exposure or practice effects. Together, our results demonstrate that perceptual expertise can, in principle, reduce SOS, even when the perceptual training does not specifically target SOS reduction.
- Published
- 2022
- Full Text
- View/download PDF
3. Rewilding by Wolf Recolonisation, Consequences for Ungulate Populations and Game Hunting
- Author
-
Mariano Rodríguez-Recio, Camilla Wikenros, Barbara Zimmermann, and Håkan Sand
- Subjects
trophic rewilding ,human-predator conflicts ,wolf recolonisation ,game hunting ,wolf predation ,prey-species selection ,Biology (General) ,QH301-705.5 - Abstract
The ongoing recolonisations of human-transformed environments in Europe by large carnivores like the wolf Canis lupus means that conservation conflicts could re-surface, among other reasons, due to predation on ungulate game species. We estimated the effect of wolves on ungulate species using data on wolf prey selection, kill rates and territory size to build a hypothetical case of future expansion. We extrapolated results on predation from the current wolf distribution in central Sweden and eastern Poland to the eventual wolf recolonisation of southern Sweden. We then calculated the proportion of five ungulate game species killed annually by wolves, and the ratio between the predicted annual predation by wolves given future colonization and the number of ungulates currently harvested by hunters. Results showed that wolf recolonization in southern Sweden would have a minor impact on the estimated population densities of red deer Cervus elaphus, fallow deer Dama dama and wild boar Sus scrofa, but is likely to lead to a significant reduction in human captures of moose Alces alces and roe deer Capreolus capreolus. The current five-ungulate species system in southern Sweden suggests a potential for two to four times higher wolf density than the two-ungulate species system in the northern part of their current distribution. Management and conservation of recolonizing large carnivores require a better understanding of the observed impact on game populations under similar ecological conditions to ameliorate conservation conflicts and achieve a paradigm of coexistence. Integrating these predictions into management is paramount to the current rewilding trend occurring in many areas of Europe or North America.
- Published
- 2022
- Full Text
- View/download PDF
4. The Black Rhino
- Author
-
Freeman, R. Edward, Harris, Jared D., Mead, Jenny, Cook, Sierra, and Bailey, Trisha
- Published
- 2017
- Full Text
- View/download PDF
5. Hunting and Monitoring: Community - Based Research in Xerente Indigenous Land, Brazilian Cerrado.
- Author
-
de Paula, Milton, Xerente, Valcir, and Pezzuti, Juarez
- Abstract
Community-based research that involves participatory monitoring has been increasingly used in studies on hunting activity in traditional societies of the Neotropics, particularly in the rainforest environment. We present the results from a year-long study of participatory monitoring of hunting in 10 villages in Xerente indigenous land in the Brazilian Cerrado, an initiative to build a sustainable-use program for local hunting. Fifty-two hunters recorded data on 390 hunts involving 451 kills and 5,878 kg of estimated biomass from 34 game species. Medium- and large-sized mammals were the most hunted species, while hunting activities were predominant in forest environments. Indigenous hunting techniques associated with collective hunts using fire are no longer used and the use of traditional weapons such as the bow and arrow is now uncommon; firearms were the main weapon used. The data revealed current patterns of wildlife use as well as hunting activities. The implications of these results for future research on the management and conservation of wildlife hunting in Xerente indigenous land are presented. We present our findings to facilitate improved preparation of new monitoring programs in traditional societies that live in the Cerrado. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
6. Pheasants, buzzards, and trophic cascades.
- Author
-
Lees, Alexander C., Newton, Ian, and Balmford, Andrew
- Subjects
- *
PHEASANTS , *BUZZARDS , *MORTALITY , *BIOTIC communities - Abstract
The partial recovery of large birds of prey in lowland Britain has reignited conflicts with game managers and prompted a controversial U.K. government proposal to investigate ways of limiting losses to pheasant shooting operations. Yet best estimates are that buzzards are only a minor source of pheasant mortality-road traffic, for example, is far more important. Moreover, because there are often large numbers of nonbreeding buzzards, local control of breeding pairs may simply lead to their replacement by immigrant buzzards. Most significantly, consideration of the complexity of trophic interactions suggests that even if successful, lowering buzzard numbers may directly or indirectly increase the abundance of other medium-sized predators (such as foxes and corvids) which potentially have much greater impacts on pheasant numbers. To be effective, interventions need to be underpinned by far more rigorous understanding of the dynamics of ecosystems dominated by artificially reared, superabundant nonnative game species. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
7. Satisfaction of Search Can Be Ameliorated by Perceptual Learning: A Proof-of-Principle Study.
- Author
-
Park E, Branch F, and Hegdé J
- Abstract
When searching a visual image that contains multiple target objects of interest, human subjects often show a satisfaction of search (SOS) effect, whereby if the subjects find one target, they are less likely to find additional targets in the image. Reducing SOS or, equivalently, subsequent search miss (SSM), is of great significance in many real-world situations where it is of paramount importance to find all targets in a given image, not just one. However, studies have shown that even highly trained and experienced subjects, such as expert radiologists, are subject to SOS. Here, using the detection of camouflaged objects (or camouflage-breaking) as an illustrative case, we demonstrate that when naïve subjects are trained to detect camouflaged objects more effectively, it has the side effect of reducing subjects' SOS. We tested subjects in the SOS task before and after they were trained in camouflage-breaking. During SOS testing, subjects viewed naturalistic scenes that contained zero, one, or two targets, depending on the image. As expected, before camouflage-training, subjects showed a strong SOS effect, whereby if they had found a target with relatively high visual saliency in a given image, they were less likely to have also found a lower-saliency target when one existed in the image. Subjects were then trained in the camouflage-breaking task to criterion using non-SOS images, i.e., camouflage images that contained zero or one target. Surprisingly, the trained subjects no longer showed significant levels of SOS. This reduction was specific to the particular background texture in which the subjects received camouflage training; subjects continued to show significant SOS when tested using a different background texture in which they did not receive camouflage training. A separate experiment showed that the reduction in SOS was not attributable to non-specific exposure or practice effects. Together, our results demonstrate that perceptual expertise can, in principle, reduce SOS, even when the perceptual training does not specifically target SOS reduction.
- Published
- 2022
- Full Text
- View/download PDF
8. Forest Stakeholder Participation in Improving Game Habitat in Swedish Forests.
- Author
-
Ezebilo, Eugene E.
- Abstract
Although in Sweden the simultaneous use of forests for timber production and game hunting are both of socioeconomic importance it often leads to conflicting interests. This study examines forest stakeholder participation in improving game habitat to increase hunting opportunities as well as redistribute game activities in forests to help reduce browsing damage in valuable forest stands. The data for the study were collected from a nationwide survey that involved randomly selected hunters and forest owners in Sweden. An ordered logit model was used to account for possible factors influencing the respondents' participation in improving game habitat. The results showed that on average, forest owning hunters were more involved in improving game habitat than non-hunting forest owners. The involvement of non-forest owning hunters was intermediate between the former two groups. The respondents' participation in improving game habitat were mainly influenced by factors such as the quantity of game meat obtained, stakeholder group, forests on hunting grounds, the extent of risk posed by game browsing damage to the economy of forest owners, importance of bagging game during hunting, and number of hunting days. The findings will help in designing a more sustainable forest management strategy that integrates timber production and game hunting in forests. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
9. Pb–Al relationships in waterfowl feces discriminate between sources of Pb exposure
- Author
-
Martínez-Haro, M., Taggart, M.A., and Mateo, R.
- Subjects
LEAD in the body ,MALLARD ,FECES examination ,SHOT (Pellets) ,INGESTION ,LEAD poisoning in animals - Abstract
Hunted mallards (n = 56) were collected in the Ebro Delta (Spain) in 2007–08 to evaluate the use of feces as a non-invasive monitoring method to study lead shot ingestion. The prevalence of Pb shot ingestion in these birds was 28.6%, and similar to that reported before a ban on Pb shot use in 2003. Lead concentrations in terminal intestinal contents were higher in mallards with Pb shot in their gizzard. Feces Pb concentrations >34 μg/g d.w were indicative of Pb shot ingestion, and background Pb levels were <12.5 μg/g d.w. To discriminate between birds ingesting soil Pb, and those ingesting Pb shot, we correlated Al and Pb levels and showed that mallards with ingested Pb shot in the gizzard stood out as outliers within the regression. Feces Pb–Al relationships can be used as a simple non-invasive tool in monitoring programs regarding Pb shot ingestion in birds. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
10. Rewilding by Wolf Recolonisation, Consequences for Ungulate Populations and Game Hunting.
- Author
-
Rodríguez-Recio, Mariano, Wikenros, Camilla, Zimmermann, Barbara, and Sand, Håkan
- Subjects
- *
CARNIVOROUS animals , *UNGULATES , *WILD boar , *RED deer , *MOOSE , *WOLVES - Abstract
Simple Summary: Humans extirpated the wolf Canis lupus from many regions of Europe. Today, the wolf is returning to many of these areas, and with it, people's opposition due to its predatory habits on, among others, ungulate game species. Based on existing data on wolf prey selection, kill rates and territory size, we extrapolated the results from central Sweden and Poland to southern Sweden, where wolf recolonization has not yet occurred and conservation conflicts with hunters are expected. Thus, we calculated the proportion of moose Alces alces, roe deer Capreolus capreolus, red deer Cervus elaphus, fallow deer Dama dama and wild boar Sus scrofa that would be killed by wolves in the municipalities of southern Sweden if wolf recolonization occurs. We found that the current system of five ungulate species in southern Sweden could potentially support a wolf density two to four times higher than in the current wolf distribution in central Sweden, which are mainly inhabited by roe deer and moose. With this type of research, we can anticipate and work to ameliorate the social unrest and expected conservation conflicts that may arise once wolves or other large carnivore species recolonize areas of Europe that are returning to the wild. The ongoing recolonisations of human-transformed environments in Europe by large carnivores like the wolf Canis lupus means that conservation conflicts could re-surface, among other reasons, due to predation on ungulate game species. We estimated the effect of wolves on ungulate species using data on wolf prey selection, kill rates and territory size to build a hypothetical case of future expansion. We extrapolated results on predation from the current wolf distribution in central Sweden and eastern Poland to the eventual wolf recolonisation of southern Sweden. We then calculated the proportion of five ungulate game species killed annually by wolves, and the ratio between the predicted annual predation by wolves given future colonization and the number of ungulates currently harvested by hunters. Results showed that wolf recolonization in southern Sweden would have a minor impact on the estimated population densities of red deer Cervus elaphus, fallow deer Dama dama and wild boar Sus scrofa, but is likely to lead to a significant reduction in human captures of moose Alces alces and roe deer Capreolus capreolus. The current five-ungulate species system in southern Sweden suggests a potential for two to four times higher wolf density than the two-ungulate species system in the northern part of their current distribution. Management and conservation of recolonizing large carnivores require a better understanding of the observed impact on game populations under similar ecological conditions to ameliorate conservation conflicts and achieve a paradigm of coexistence. Integrating these predictions into management is paramount to the current rewilding trend occurring in many areas of Europe or North America. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
11. Conservation of a high diversity primate assemblage
- Author
-
Puertas, Pablo and Bodmer, Richard E.
- Published
- 1993
- Full Text
- View/download PDF
12. Conservation of a high diversity primate assemblage
- Author
-
Bodmer, R. E. and Puertas, P.
- Subjects
CONSERVATION of natural resources ,WILDLIFE management - Published
- 1993
13. The rule of law and African game - a review of some recent trends and concerns
- Author
-
Spinage, Clive
- Subjects
WILDLIFE conservation ,LEGISLATION ,HISTORY - Published
- 1996
- Full Text
- View/download PDF
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