Spreadsheets, Response Surfaces, and Intervention Decisions in Wildlife Damage Management
نویسنده
چکیده
An a priori approach to examining the economics of performing management activities to reduce agricultural and resource damage by wildlife is described. Computer spreadsheet procedures are used to derive response surfaces of potential net savings and benefit:cost indices for selected cropor resource-protection activities. Tabular and graphical displays of these indices afford decision-making aids for wildlife-damage interventions. An example based on the use of an acute rodenticide, zinc phosphide (Zn 3 P 2 ), for vole (Microtus spp.) control in alfalfa (Medicago sativa) is described. Iterative calculations were derived for 1,260 possible combinations of 3 field-size, 6 crop-loss, 7 bait-effectiveness, and 10 application-fee variables. Average 1998 USDA alfalfa yield and price data (7.77 Mton•ha and US$100.33•Mton), plus commercial placeboand Zn 3 P 2 -bait costs (US$0.42•kg and US$2.73•kg), served as the point of comparison. Effects were transitive, with greater net savings and benefit:cost ratios linked with larger field-size, crop-damage and bait-effectiveness variables, but decreased bait-application fees. Potential net savings were essentially negative when damage was <10%. Minimum and maximum benefit:cost ratios were 0.40 and 6.45; ratios ≥2.0 occurred typically when damage was ≥15%. The utility of the illustration and the approach are discussed.
منابع مشابه
Are Wildlife-Caused Losses Of Agriculture Increasing?
Both the percent of producers reporting and the value of wildlife-caused losses increased from 1989 to 1994. In 1994, 58% of respondents reported wildlife-caused losses of their agricultural commodities, an increase from the 55% of respondents who reported losses in 1989. Based on the median value of producer-estimated loss, wildlifecaused losses cost producers approximately $591 million in 199...
متن کاملتحلیل شبکه و کنشگران کلیدی در راستای مدیریت حیات وحش (منطقه مورد مطالعه: زیستگاه سیاه خروس قفقازی- ذخیرگاه زیستکره ارسباران)
One of the most important approaches for policy making in order to biodiversity conservation and wildlife management is co-management of natural resources. Local stakeholders are one of the main elements in this approach. This is necessary to consider social network analysis in the framework of social-ecological systems toward biodiversity conservation and sustainable wildlife management. In th...
متن کاملWe Need Compassionate Leadership Management Based on Evidence to Defeat COVID-19
The current pandemic of coronavirus disease 2019 (COVID-19) has had unprecedented reach and shown the need for strong, compassionate and evidence-based decisions to effectively stop the spread of the disease and save lives. While aggressive in its response, Rwanda prioritized the lives of its people – a human right that some governments forget to focus on. The country t...
متن کاملOptimal Stochastic Control in Continuous Time with Wiener Processes: General Results and Applications to Optimal Wildlife Management
We present a stochastic optimal control approach to wildlife management. The objective value is the present value of hunting and meat, reduced by the present value of the costs of plant damages and traffic accidents caused by the wildlife population. First, general optimal control functions and value functions are derived. Then, numerically specified optimal control functions and value func...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002