scholarly journals The Effect of Chronic Wasting Disease on Resident Deer Hunting Permit Demand in Wisconsin

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1096
Author(s):  
Dane Erickson ◽  
Carson Reeling ◽  
John G. Lee
Keyword(s):  
Chronic Wasting Disease ◽  
Negative Impact ◽  
The State ◽  
Prior Work ◽  
Wasting Disease ◽  
Deer Hunting ◽  
On Demand ◽  
Permit Price ◽  
Over Time ◽  
Hunter Recruitment

Chronic wasting disease (CWD) has had a negative impact on deer license demand in Wisconsin since it was first found in the state in 2002. Prior work evaluates the effect of CWD on hunting permit sales, but only in the period immediately after the disease was discovered. We use data on hunting permit sales, permit price, and other demand shifters to estimate a model of deer permit demand for the period 1966–2015. We use the estimated model to quantify the effect of CWD on (1) hunter demand for deer permits; (2) hunter surplus from hunting; and (3) lost hunting permit revenues. Hunter participation declined by 5.4% after CWD was detected in 2002. Hunter surplus decreased by $96 million over this period, while permit revenues declined by nearly $17 million. The effect of CWD was greater on demand for firearm permits than for archery permits. We also find that the effects of CWD diminish over time in absolute terms. This is because permit demand would have started to decline in 2008 even in the absence of CWD. This finding implies efforts to control CWD and efforts at hunter recruitment are economic complements and should be pursued jointly to maximize hunter welfare.

scholarly journals Misinterpreting Others and the Fragility of Social Learning

Econometrica ◽  
2020 ◽  
Vol 88 (6) ◽  
pp. 2281-2328 ◽  
Author(s):  
Mira Frick ◽  
Ryota Iijima ◽  
Yuhta Ishii
Keyword(s):  
Social Learning ◽  
Negative Impact ◽  
Information Aggregation ◽  
The State ◽  
Type Distribution ◽  
Long Run ◽  
Private Signals ◽  
The World ◽  
True State ◽  
Over Time

We exhibit a natural environment, social learning among heterogeneous agents, where even slight misperceptions can have a large negative impact on long‐run learning outcomes. We consider a population of agents who obtain information about the state of the world both from initial private signals and by observing a random sample of other agents' actions over time, where agents' actions depend not only on their beliefs about the state but also on their idiosyncratic types (e.g., tastes or risk attitudes). When agents are correct about the type distribution in the population, they learn the true state in the long run. By contrast, we show, first, that even arbitrarily small amounts of misperception about the type distribution can generate extreme breakdowns of information aggregation, where in the long run all agents incorrectly assign probability 1 to some fixed state of the world, regardless of the true underlying state. Second, any misperception of the type distribution leads long‐run beliefs and behavior to vary only coarsely with the state, and we provide systematic predictions for how the nature of misperception shapes these coarse long‐run outcomes. Third, we show that how fragile information aggregation is against misperception depends on the richness of agents' payoff‐relevant uncertainty; a design implication is that information aggregation can be improved by simplifying agents' learning environment. The key feature behind our findings is that agents' belief‐updating becomes “decoupled” from the true state over time. We point to other environments where this feature is present and leads to similar fragility results.

scholarly journals Revisiting Hunter Perceptions toward Chronic Wasting Disease: Changes in Behavior over Time

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 187
Author(s):  
Angela M. Holland ◽  
Jacob M. Haus ◽  
T. Brian Eyler ◽  
Mark D. Duda ◽  
Jacob L. Bowman
Keyword(s):  
Perceived Risk ◽  
Chronic Wasting Disease ◽  
Cervus Nippon ◽  
Significant Decline ◽  
Behavioral Changes ◽  
Hunting Behavior ◽  
Wasting Disease ◽  
Harvest Rate ◽  
Time Period ◽  
Over Time

Hunter behavior varies in relation to perceived risk of Chronic Wasting Disease (CWD) and changes in perceptions of CWD will lead to changes in behavior over time. During 2018, we surveyed deer (Odocoileus virginianus or Cervus nippon) hunters from Maryland, USA, regarding behavioral changes due to CWD. We matched 477 respondents to their harvest record and created two geographical groups based on harvest history in counties closest to disease presence. We compared the proportion of hunters who claimed to have changed their behavior in each group and estimated the effects of CWD on harvest rate for the 4 years immediately after the discovery of CWD and the following 4-year period. We found no difference between the groups in the proportion of hunters who changed their behavior due to CWD. We found a significant decline in harvest rate for hunters who claimed to change their behavior in the group closest to CWD presence during the period immediately after the discovery of CWD; however, these same hunters increased their harvest rates in the next time period to pre-CWD levels. Overall, we found that time alleviates some perceived risk of CWD and that this is reflected in hunting behavior.

Hunter Concerns and Intention to Hunt in Forested Areas Affected by Wildlife Disease

2021 ◽  
Author(s):  
Abigail Meeks ◽  
Neelam C Poudyal ◽  
Lisa I Muller ◽  
Chuck Yoest
Keyword(s):  
Chronic Wasting Disease ◽  
Human Health Risk ◽  
Wildlife Disease ◽  
Wildlife Diseases ◽  
Hunting Behavior ◽  
Wasting Disease ◽  
Private Lands ◽  
Deer Hunting ◽  
Short And Long Term

Abstract Deer hunting is a major forest-based recreation activity in the US South. However, the recent discovery of chronic wasting disease (CWD) threatens deer hunting in the region. Stakeholders are interested in understanding how hunters perceive the risk and change their hunting behavior. This study found a significant change in hunters’ concerns after the first deer season since the discovery of CWD in Tennessee, USA. Results also showed that hunters’ short- and long-term intentions to hunt deer in the region were positively related to previous experience of hunting in CWD-affected areas, beliefs in the effectiveness of herd reduction to control CWD, concerns regarding potential decline in deer quality and changes in hunting regulations due to CWD, and trust in wildlife agency action. Hunters who hunt on public land and were concerned with deer and human health risk were less likely to hunt in the CWD region. These results are useful in understanding hunter behavior in response to wildlife disease and identifying variables that may help project immediate as well as long-term change in hunting demand in affected regions. Study Implications As two-thirds of forestlands in the USA are under private ownership and public hunting lands are limited or crowded in many regions, deer hunting occurs mostly on private lands. Managers of private and public forestlands that provide recreation access for hunting benefit from a better understanding of how wildlife diseases affect user perception and demand for deer hunting on their lands. One such disease issue that has threatened the hunting industry in the nation is chronic wasting disease in white-tailed deer. Results from this study inform on how hunters perceive the risk of disease, how their relative tolerance changes over time, and what factors determine their intention to hunt in forests with diseased deer. These findings are useful in understanding hunter’s behavior in response to wildlife disease in forest lands and highlight variables that may determine hunting demand in affected regions both in the short- and long-term.

scholarly journals Parliamentary Reform in Canada: The Significance of Senate Reform

2016 ◽  
Vol 1 (2) ◽  
pp. 15-22
Author(s):  
Navneet Gidda
Keyword(s):  
Negative Impact ◽  
Status Quo ◽  
The State ◽  
Parliamentary System ◽  
The People ◽  
Parliamentary Reform ◽  
The Status ◽  
Over Time ◽  
Constitutional Revision

In this paper, I will argue that the Canadian Parliamentary system has become significantly less democratic over time and therefore requires reform. Specifically, I will focus on the Senate and the ways in which the institution has had a negative impact on the state of Canadian democracy. Through an analysis of how Senators are selected, the make up of the Senate, and the institution’s role in Canadian governance, I come to the conclusion that Canadians must demand reform if they are to maintain a strong, healthy democracy that serves their interests. Mainly, I support a Triple E Senatorial system since it gets at the root of the problem by decentralizing federal power and giving it to the provinces and Canadian people. I also include a brief discussion of Justin Trudeau’s plan for the Senate which proposes more immediate reform and does not require constitutional revision. Rather than demanding abolition or tolerating the status quo, taking these steps towards reform will ensure that Canadian interests are the government’s top priority. Through reform, Canadians would have more effective “sober second thought” and a democracy that works for the people, not the party in power.

scholarly journals Chronic Wasting Disease (CWD) in Sami Reindeer Herding: The Socio-Political Dimension of an Epizootic in an Indigenous Context

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 297
Author(s):  
Simon Maraud ◽  
Samuel Roturier
Keyword(s):  
Risk Management ◽  
Chronic Wasting Disease ◽  
The State ◽  
Common Interest ◽  
Surveillance Program ◽  
The European Union ◽  
Scientific Controversy ◽  
Reindeer Herding ◽  
Wasting Disease ◽  
Political Dimension

Chronic wasting disease (CWD) is the most transmissible of the prion diseases. In 2016, an unexpected case was found in Norway, the first in Europe. Since then, there have been 32 confirmed cases in Norway, Sweden, and Finland. This paper aims to examine the situation from a social and political perspective: considering the management of CWD in the Swedish part of Sápmi—the Sami ancestral land; identifying the place of the Sami people in the risk management–because of the threats to Sami reindeer herding that CWD presents; and understanding how the disease can modify the modalities of Indigenous reindeer husbandry, whether or not CWD is epizootic. Based on interviews with various stakeholders and by examining the social sciences literature, this paper shows that the health risk management is structured by a politico-scientific controversy about the recognition, or not, of atypical and classical CWD. The Sami herders are currently cooperating with the state authorities in the surveillance program to sample their herds. This involvement takes place in a situation where the balance of power between the Sami people and the state, or the European Union, is framed by its colonial context. This has consequences with respect to the definition of a common interest and to implementing sanitary measures. The particular features of reindeer herding are seen as a challenge to managing CWD risk, compared with European health standards. We argue that CWD will greatly modify the modalities of Indigenous reindeer herding, whether there are positive cases or not in the Sami reindeer. By implementing new health guidelines, the authorities will create a cascading effect in Sami land and its use. The CWD situation in Fennoscandia is full of uncertainty but may cause a major shift in the organization and the governance of Sápmi. In September 2020, the identification of a new CWD case in a wild reindeer in Norway started a new episode in the disease management in Fennoscandia. Our paper raises various questions linked to understanding this new step in this crisis which is not only epidemiological, but also socio-cultural and political.

The Negative Impact of Biological Variation in the Effect and Clearance of Warfarin on Methods for Prediction of Dose Requirements

1986 ◽  
Vol 56 (03) ◽  
pp. 371-375 ◽  
Author(s):  
Peretz Weiss ◽  
Hillel Halkin ◽  
Shlomo Almog
Keyword(s):  
Individual Variation ◽  
Negative Impact ◽  
Warfarin Dose ◽  
Empirical Therapy ◽  
Maintenance Phase ◽  
Individual Variability ◽  
Dose Prediction ◽  
Group I ◽  
Over Time ◽  
Variance Explained

SummaryWithin-individual variation over time in the clearance (Cl) and effect (PT%) of warfarin, was measured in 25 inpatients (group I) studied after standard single or individualized split loading doses and 1-3 times (n = 16) 8-16 weeks later during maintenance. Mean Cl (2.5 α 0.9 ml/min) was similar in both phases but significant changes occurred in 6/16 patients, exceeding those expected from within-individual variation alone (defined by its 95% tolerance limits -24% to +62%). Initial PT% (21 α 5) was unaffected by dosing schedule, total or free plasma warfarin, varying between patients by only 18-24%. Mean initial and maintenance dose-PT% ratios (8.2 mg/d: 21% and 4.1 mg/d: 40%) were similar but significant changes in sensitivity to warfarin occurred in 4/16 patients. In group I and 64 other outpatients on maintenance therapy, between-individual variability was 36-52% for Cl and 49-56% for effect. PT% correlated best (r = 0.56) with free and total plasma warfarin but poorly with dose (r = 0.29), with only 30% of PT% variance explained at best, due to high between patient variability.Warfarin dose prediction whether based on extrapolation from initial effects to the maintenance phase, or on iterative methods not allowing for between- or within-patient variation in warfarin clearance or effect which may occur independently over time, have not improved on empirical therapy. This, due to the elements of biological variability as well as the intricacy of the warfarin - prothrombin complex interaction not captured by any kinetic-dynamic model used for prediction to date.

Opponent Center-Surround Contrast: Colour to Grey Conversion

2020 ◽  
Vol 2020 (1) ◽  
pp. 105-108
Author(s):  
Ali Alsam
Keyword(s):  
Evolutionary Algorithms ◽  
Three Dimensional ◽  
The State ◽  
Colour Space ◽  
Vision Science ◽  
State Of Art ◽  
Over Time

Vision is the science that informs us about the biological and evolutionary algorithms that our eyes, opticnerves and brains have chosen over time to see. This article is an attempt to solve the problem of colour to grey conversion, by borrowing ideas from vision science. We introduce an algorithm that measures contrast along the opponent colour directions and use the results to combine a three dimensional colour space into a grey. The results indicate that the proposed algorithm competes with the state of art algorithms.

ANALYSIS OF MEASURES TO REDUCE ECOLOGICAL AND ECONOMIC DAMAGE FROM AUTOMOBILE TRANSPORT

2020 ◽  
Author(s):  
V.N. Kurdyukov ◽  
◽  
T.V. Lebedeva ◽  
Keyword(s):  
Resource Allocation ◽  
Negative Impact ◽  
The State ◽  
Point Of View ◽  
Motor Vehicles ◽  
Economic Damage ◽  
Agriculture Education

The article considers common classifications of measures to reduce environmentaleconomic damage from motor vehicles. Classification from the point of view of control impact is proposed, which allows to take into account relations between the state and citizens in the field of reduction of negative impact of motor vehicles on the environment. The analysis of the classification made it possible to identify areas of activity for improving the efficiency of management impacts, taking into account the incentives of citizens to comply with the requirements of the legislation and to create conditions for their exceeding. Increasing the efficiency of resource allocation in the Territory will allow the released funds to be allocated to the development of industry, agriculture, education and science.

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