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Articles 181 - 210 of 219
Full-Text Articles in Environmental Health and Protection
Impacts Of The Cancellation Of The Spring Bear Hunt In Ontario, Canada, Raynald Harvey Lemelin
Impacts Of The Cancellation Of The Spring Bear Hunt In Ontario, Canada, Raynald Harvey Lemelin
Human–Wildlife Interactions
Approximately 10 million people and 100,000 black bears (Ursus americanus) live in Ontario, Canada. The highest concentration of black bears (0.4–0.6 bears/100 km2) is in northern Ontario (Bear Wise 2004). While this area is sparsely populated by humans, it is the site where human–bear conflicts are common for several reasons. These include people spending time in formerly inaccessible areas via forestry roads and off-road vehicle trails, changing recreational patterns, and a growing black bear population (Conover 2008, Madison 2008). Among residents of northern Ontario (hereafter referred to as northerners), no other wildlife management issue has dominated …
Evaluation Of Physical Barriers To Prevent Prairie Dog Colony Expansion, Gary Witmer, James Gionfriddo, Michael Pipas
Evaluation Of Physical Barriers To Prevent Prairie Dog Colony Expansion, Gary Witmer, James Gionfriddo, Michael Pipas
Human–Wildlife Interactions
Expansion of black-tailed prairie dog (Cynomys ludovicianus) colonies on public and private lands can result in damage to property. Physical barriers to prairie dogs can be used to minimize human–wildlife conflicts. We evaluated 17 existing barriers in the Fort Collins and Boulder, Colorado, areas. Most barriers were made of a single row of vinyl material; these barriers sustained high levels of damage, primarily from wind, and were frequently breached by prairie dogs digging underneath them. Barriers that included a vegetation and a vinyl barrier or a double-vinyl barrier were wind damaged and breached less frequently than the single-vinyl …
Impacts Of The Black Bear Supplemental Feeding Program On Ecology In Western Washington, Georg J. Ziegltrum
Impacts Of The Black Bear Supplemental Feeding Program On Ecology In Western Washington, Georg J. Ziegltrum
Human–Wildlife Interactions
Black bears (Ursus americanus) are opportunistic omnivores (Simpson 1945) that feed on grasses, grubs, insects, berries, human garbage, and they scavenge from animal carcasses (Cotton 2008, Thiemann et al. 2008). During the spring, they also girdle trees to feed on the newly forming phloem (Poelker and Hartwell 1973, Noble and Meslow 1998, Partridge et al. 2001). Extensive black bear damage to conifers coincided with the beginning of intensive forest management on industrial and smaller private lands in western Washington during the early 1940s; high-yield tree plantations (i.e., tree farms) required protection to reduce tree girdling by black bears. …
Conflicts Between Local Villagers And Tibetan Brown Bears Threaten Conservation Of Bears In A Remote Region Of The Tibetan Plateau, Fiona R. Worthy, J. Marc Foggin
Conflicts Between Local Villagers And Tibetan Brown Bears Threaten Conservation Of Bears In A Remote Region Of The Tibetan Plateau, Fiona R. Worthy, J. Marc Foggin
Human–Wildlife Interactions
Tibetan brown bears (Ursus arctos pruinosus) are rare across most of the Tibetan Plateau (Schaller 1998, Harris 2008). Yet, contacts between bears and local herders are increasing. Unlike other countries where nuisance bears may be shot or relocated (Peine 2001, Gunther et al. 2004), China forbids these practices, and most hunting is forbidden. In addition, all firearms were confiscated from local herders in 2000. Thus, despite their increasing threats to Tibetan communities, Tibetan brown bears generally are safe from retaliatory killings by local villagers.
Assessment Of Costs Associated With Deer–Vehicle Collisions: Human Death And Injury, Vehicle Damage, And Deer Loss, John A. Bissonette, Christine A. Kassar, Lawrence J. Cook
Assessment Of Costs Associated With Deer–Vehicle Collisions: Human Death And Injury, Vehicle Damage, And Deer Loss, John A. Bissonette, Christine A. Kassar, Lawrence J. Cook
Human–Wildlife Interactions
Collisions between large vertebrates and vehicles along roadways are an increasing concern, not only because of ecological consequences, but also because of associated economic and social costs. We used a large-scale, long-term data set comprising several databases from Utah to summarize and analyze these costs. The overall cost for 13,020 collisions from 1996 to 2001 in Utah was approximately $45,175,454, resulting in an estimated average per year cost of about $7,529,242 and a mean collision cost of $3,470. These figures include human fatality costs of $24 million (53% of total costs); vehicle damage costs of $18 million (39%); loss of …
Locations Of Deer–Vehicle Collisions Are Unrelated To Traffic Volume Or Posted Speed Limit, John A. Bissonette, Christine A. Kassar
Locations Of Deer–Vehicle Collisions Are Unrelated To Traffic Volume Or Posted Speed Limit, John A. Bissonette, Christine A. Kassar
Human–Wildlife Interactions
Consensus is lacking regarding the influence of vehicle speed and traffic volume on deer–vehicle collision (DVC) rates. Yet, annual average daily traffic fl ow (AADT) and posted speed limit (PSL) typically are used to measure these variables. To resolve this conflict, we studied the effects of traffic volume and vehicle speed on DVCs in Utah. Our results showed no relationship between AADT or PSL and DVC occurrence. There are at least 3 explanations for our results: (1) no causal relationship exists; (2) AADT and PSL, as measured, actually explain little of the variation; and (3) data quality problems exist. We …
Standardizing The Data On Wildlife–Vehicle Collisions, Johan T. Du Toit
Standardizing The Data On Wildlife–Vehicle Collisions, Johan T. Du Toit
Human–Wildlife Interactions
There are few more dramatic manifestations of human– wildlife conflict than squealing brakes, a sickening crunch, flying gravel, and then silence except for the weakly spasmodic scrabbling of a semipulverized deer as it lies dying on the side of a highway. The scientific analysis of wildlife–vehicle collisions is an applied science of increasing importance throughout the industrialized world, but it is yet woefully deficient in theoretical underpinnings and standardized methodology. The overarching discipline of road ecology has only recently gained formal recognition through the publication of the first definitive book on this topic by Forman et al. (2003). And until …
Keeping Up With All Those Deer, Bruce D. Leopold
Keeping Up With All Those Deer, Bruce D. Leopold
Human–Wildlife Interactions
This issue of Human–Wildlife Conflicts deals with an important topic: deer–human conflicts. Wildlife biologists face a dilemma over managing deer populations. On the one hand, deer are the foundation of our state agencies concerning hunting and license revenues. On the other hand, however, deer populations in many states have increased to the point that hunting is not serving as the regulatory tool that it has been in the past. Changes in habitat, urban sprawl, and hunting pressure have contributed to large populations of deer. Excessive deer populations have serious ramifications, including impacts on agriculture, private landowners, and, most tragically, on …
Book Review: The Double-Crested Cormorant: Issues And Management, Valerie M. Burton
Book Review: The Double-Crested Cormorant: Issues And Management, Valerie M. Burton
Human–Wildlife Interactions
Fish-eating birds and their interactions with fisheries cause mixed feelings for many people. Avian and human fisheries are perceived to be in conflict throughout the world, particularly in areas where piscivorous bird populations are increasing numerically and expanding geographically. These interactions have long been the subject of research, with papers dating back to at least the 1930s. Not only are the conflicts of fish-eating birds of scientific concern, the birds also cause political, biological, ecological, and socioeconomic issues throughout the country.
Sharpshooting Suburban White-Tailed Deer Reduces Deer–Vehicle Collisions, Anthony J. Denicola, Scott C. Williams
Sharpshooting Suburban White-Tailed Deer Reduces Deer–Vehicle Collisions, Anthony J. Denicola, Scott C. Williams
Human–Wildlife Interactions
Too many deer–vehicle collisions (DVCs) are one of the primary reasons local governments implement lethal deer management programs. However, there are limited data to demonstrate that a reduction in deer (Odocoileus spp.) densities will result in a decline in DVCs. We conducted sharpshooting programs in 3 suburban communities to reduce deer numbers and to address rising DVCs. Annual or periodic population estimates were conducted using both helicopter snow counts and aerial infrared counts to assess population trends. Management efforts were conducted from 3 to 7 years. Local deer herds were reduced by 54%, 72%, and 76%, with resulting reductions …
Factors Affecting Road Mortality Of Whitetailed Deer In Eastern South Dakota, Troy W. Grovenburg, Jonathan A. Jenks, Robert W. Klaver, Kevin L. Monteith, Dwight H. Galster, Ron J. Shauer, Wilbert W. Morlock, Joshua A. Delger
Factors Affecting Road Mortality Of Whitetailed Deer In Eastern South Dakota, Troy W. Grovenburg, Jonathan A. Jenks, Robert W. Klaver, Kevin L. Monteith, Dwight H. Galster, Ron J. Shauer, Wilbert W. Morlock, Joshua A. Delger
Human–Wildlife Interactions
White-tailed deer (Odocoileus virginianus) mortalities (n = 4,433) caused by collisions with automobiles during 2003 were modeled in 35 counties in eastern South Dakota. Seventeen independent variables and 5 independent variable interactions were evaluated to explain deer mortalities.
Demographics Of Non-Hunted White-Tailed Deer Populations In Suburban Areas, Anthony J. Denicola, Dwayne R. Etter, Thomas Almendinger
Demographics Of Non-Hunted White-Tailed Deer Populations In Suburban Areas, Anthony J. Denicola, Dwayne R. Etter, Thomas Almendinger
Human–Wildlife Interactions
Burgeoning deer populations in urban and suburban areas, along with the inherent problems stemming from this increase, are becoming increasingly widespread. To address these problems, wildlife biologists need quality baseline data of herd composition for harvest and treatment forecasts for management and fertility control research programs. In this study, we provide white-tailed deer (Odocoileus virginianus) population data from 4 areas where localized suburban white-tailed deer populations were substantially reduced utilizing sharpshooting as a management tool. In each area, legal hunting was nonexistent for >10 years preceding the sharpshooting program. The areas ranged in size from 300 ha to …
Book Review: Urban Wildlife Management, Jennifer Lynch
Book Review: Urban Wildlife Management, Jennifer Lynch
Human–Wildlife Interactions
The ever-growing field of human–wildlife conflicts has lacked a comprehensive textbook that addresses wildlife management in the urban landscape. Professors teaching urban wildlife classes have drawn on peer-reviewed and popular articles to support the subject matter. Enter wildlife professors Clark Adams, Sara Ash, and Kieran Lindsey. Together, they have brought to us the first comprehensive book on urban wildlife management, titled (you guessed it) Urban Wildlife Management.
Safe Driving Suggestions For Deer Country, Michael R. Conover
Safe Driving Suggestions For Deer Country, Michael R. Conover
Human–Wildlife Interactions
This issue of Human–Wildlife Conflicts is dedicated to the topic of deer–vehicle collisions (DVCs). Within these pages, you will find numerous peer-reviewed articles and columns that provide valuable information about where, when, and why DVCs occur (Bissonette et al. 2008), their economic impact (Bissonette and Kasser 2008), their relationship to deer densities, and methods to reduce their frequency (Mastro et al. 2008). While we can never totally prevent DVCs from occurring, the information contained herein can help reduce their frequency (Curtis et al. 2008, DeNicola and Williams 2008, Miller et al. 2008, Rutberg and Naugle 2008).
Deer–Vehicle Collision Prevention Techniques, Lauren L. Mastro, Michael R. Conover, S. Nicole Frey
Deer–Vehicle Collision Prevention Techniques, Lauren L. Mastro, Michael R. Conover, S. Nicole Frey
Human–Wildlife Interactions
Every year in the United States approximately 1.5 million deer–vehicle collisions (DVCs) occur resulting in >29,000 human injuries, >200 human fatalities, 1.3 million deer fatalities, and >1 billion dollars worth of property damage. Despite the magnitude of this problem, there are relatively few well-designed studies that have evaluated techniques that can be used to reduce DVCs. Techniques to reduce DVCs fall into 4 categories: reducing the number of deer (Odocoileus spp.), reducing the number of vehicles, modifying deer behavior, and changing motorist behavior. Techniques to reduce the number of deer include decreasing the deer population or excluding deer from …
Deer–Vehicle Collision Statistics And Mitigation Information: Online Sources, Terry A. Messmer, Destiny R. Messmer
Deer–Vehicle Collision Statistics And Mitigation Information: Online Sources, Terry A. Messmer, Destiny R. Messmer
Human–Wildlife Interactions
Although good data are lacking, published estimates suggest that >1.5 million deer– vehicle collisions (DVCs) occur annually in the United States. The estimated losses exceed 1 billion dollars. In some states, DVCs are a major cause of reportable accidents. Federal, state, and private partners have cooperated in monitoring trends in DVCs and implementing mitigation measures. Most of this information about such measures is readily available via the Internet. The purpose of this paper is to provide the reader with a broad overview of and a guide to the information currently available online to mitigate DVCs.
Gnrh Immunocontraception Of Male And Female White-Tailed Deer Fawns, Lowell A. Miller, James P. Gionfriddo, Jack C. Rhyan, Kathleen A. Fagerstone, Donald C. Wagner, Gary J. Killian
Gnrh Immunocontraception Of Male And Female White-Tailed Deer Fawns, Lowell A. Miller, James P. Gionfriddo, Jack C. Rhyan, Kathleen A. Fagerstone, Donald C. Wagner, Gary J. Killian
Human–Wildlife Interactions
Immunocontraceptive vaccines based on gonadotropin-releasing hormone (GnRH) have been tested in adult white-tailed deer (Odocoileus virginianus), but their effects on fawns are unknown. The purpose of this study was to determine if early immunization against GnRH would induce a long-lasting immune response in fawns, and if it would delay or prevent sexual development. We gave primary and subsequent booster injections of a KLH-GnRH/Freund’s vaccine to 6 male and 6 female fawns. This vaccine contained the same active ingredients as GonaCon™ vaccine, but it contained Freund’s adjuvant instead of AdjuVac™ adjuvant. Two 450-μg injections were given 1 month apart …
Landscape And Traffic Factors Influencing Deer–Vehicle Collisions In An Urban Enviroment, Janet W. Ng, Charlene Nielson, Colleen Cassady St. Clair
Landscape And Traffic Factors Influencing Deer–Vehicle Collisions In An Urban Enviroment, Janet W. Ng, Charlene Nielson, Colleen Cassady St. Clair
Human–Wildlife Interactions
Deer–vehicle collisions (DVCs) are steadily increasing across North America. The increase is particularly pronounced in urban green spaces where deer (Odocoileus spp.) populations and road densities are high. In the greater city of Edmonton, Alberta, Canada, 333 DVCs occurred from 2002 to 2004. To identify landscape and traffic correlates of these collisions, we built 3 statistical models. The first model assessed the importance of local variables and was based on a spatial precision of the nearest intersection to which collisions were referenced. The second model was based on landscape characteristics and used the nearest township intersection to aggregate collisions. …
Deer–Vehicle Collision Trends At A Suburban Immunocontraception Site, Allen T. Rutberg, Ricky E. Naugle
Deer–Vehicle Collision Trends At A Suburban Immunocontraception Site, Allen T. Rutberg, Ricky E. Naugle
Human–Wildlife Interactions
Observations of extended estrus seasons in female white-tailed deer (Odocoileus virginianus) vaccinated with porcine zona pellucida (PZP) immunocontraceptives have led to speculation that management use of PZP would, perversely, increase the rate of deer–vehicle collisions. To test this hypothesis, we studied PZP-treated female deer at the National Institute of Standards and Technology, Gaithersburg, Maryland. PZP-treated female deer did not differ from untreated female deer in risk of death by vehicle collision, and the number of deer killed in vehicle collisions was uncorrelated with the number of deer treated with PZP, whether or not population size was controlled for. …
Hunting Helps Maintain Deer As A Valued Public Resource, Robert Southwick
Hunting Helps Maintain Deer As A Valued Public Resource, Robert Southwick
Human–Wildlife Interactions
Deer are a precious natural resource. They spellbind us with their grace. Their freedom to roam wild without boundaries reaches into our soul. But deer can spring without warning into the paths of oncoming vehicles, causing accidents that result in >1 billion dollars in damages annually. They extend their grazing into suburban yards, garden nurseries, orchards, and farms. They harbor the ticks that transmit pathogens that cause illnesses such as Lyme disease. The U.S. Centers for Disease Control and Prevention reported 23,763 cases of Lyme disease during 2002. Deer will even overeat their own food supply, causing them to face …
Life Cycle Analysis For The Cultivation And Combustion Of Miscanthus For Biofuel Compared With Natural Gas, Amanda Ashworth, Charles West, Michael Popp, Mireille Montrejaud-Vignoles, Caroline Sablayrolles, Gabrielle Benoit
Life Cycle Analysis For The Cultivation And Combustion Of Miscanthus For Biofuel Compared With Natural Gas, Amanda Ashworth, Charles West, Michael Popp, Mireille Montrejaud-Vignoles, Caroline Sablayrolles, Gabrielle Benoit
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
As negative environmental and economic impacts of fossil fuels have escalated, so has the importance of renewable bioenergy crops whose feedstocks are noncompetitive with food supplies. Compared with fossil fuels, use of lignocellulosic feedstocks offers potential for greenhouse gas reduction and highly positive net energy returns because of low input demand and high yields per unit of land area, thus making them advantageous for the emerging biofuel industry. The aim of this study was to simulate environmental impacts of producing a biofuel grass for combustion use based on the inventory of inputs and their effects on eutrophication of surface waters; …
Yosemite National Park: The Continuous Evolution Of Human–Black Bear Conflict Management, Joseph S. Madison
Yosemite National Park: The Continuous Evolution Of Human–Black Bear Conflict Management, Joseph S. Madison
Human–Wildlife Interactions
Human–bear conflicts are all too common throughout much of the United States (Ziegltrum 2008) and the world (Lemelin 2008, Worthy and Foggin 2008). Typically, they are a result of the availability of human food and garbage to bears (Beckmann and Lackey 2008, Thiemann et al. 2008). As people continue to build homes farther into the wildland–urban interface, the level of conflicts with bears can be expected only to increase (Conover 2008). Despite the widespread range of human–bear conflict, there is no place with quite the same problem as the Sierra Nevada mountain range of California, particularly in Yosemite National Park.
Modeling Wildlife Damage To Crops In Northern Indiana, Mónica I. Retamosa, Lee A. Humberg, James C. Beasley, Olin E. Rhodes Jr.
Modeling Wildlife Damage To Crops In Northern Indiana, Mónica I. Retamosa, Lee A. Humberg, James C. Beasley, Olin E. Rhodes Jr.
Human–Wildlife Interactions
Comprehensive information on crop damage by wildlife species is critical if effective strategies for controlling wildlife damage are to be formulated. Discriminating how landscape composition and configuration attributes influence crop damage is important for implementing landscape management techniques to resolve human–wildlife conflicts. We analyzed crop damage data from 100 corn fields and 60 soybean fields located in the Upper Wabash River Basin of northern Indiana during 2003 and 2004. We used negative binomial regression to model the rate of damage to corn and soybean crops in response to local and landscape variables. Rate of crop damage was best predicted by …
Trans Fatty Acids Provide Evidence Of Anthropogenic Feeding By Black Bears, Gregory W. Thiemann, Randal S. Stahl, Sharon Baruch-Mordo, Stewart W. Breck
Trans Fatty Acids Provide Evidence Of Anthropogenic Feeding By Black Bears, Gregory W. Thiemann, Randal S. Stahl, Sharon Baruch-Mordo, Stewart W. Breck
Human–Wildlife Interactions
Bears (Ursus spp.) that become conditioned to anthropogenic food sources pose a risk to human safety and generally need to be relocated, rehabilitated, or destroyed. Identifying food-conditioned bears may be difficult if the animal is not captured or killed while immediately engaged in the nuisance behavior. Fatty acid signature analysis has been used to examine the dietary habits of bears and other carnivores and is based on the predictable incorporation of ingested fatty acids into the consumer’s fat stores. Unusual fatty acids that are available in only a few food types may be particularly useful dietary markers. In this …
In The News, Spring 2008, Joe N. Caudell, Rob Mcilvan
In The News, Spring 2008, Joe N. Caudell, Rob Mcilvan
Human–Wildlife Interactions
The Daily Globe of Ironwood, Michigan, reported on a new Wisconsin regulation that went into effect on October 1, 2007. People who feed deer for non-hunting purposes are required to stop doing so for at least 30 days if bear or elk begin using the site. Deer-feeding currently is banned in 26 Wisconsin counties. The amount and location where bait or feed may be distributed is regulated in all of the other counties in the state. This new regulation is aimed at protecting homeowners, motorists, and the small but growing elk herd by reducing disease transmission, automobile collisions, and other …
Avoiding The Blame Game In Managing Problem Black Bears, Michael L. Wolfe
Avoiding The Blame Game In Managing Problem Black Bears, Michael L. Wolfe
Human–Wildlife Interactions
In June 2007 a black bear (Ursus americanus) took an 11-year-old boy from the tent in which he was sleeping at a semi-wilderness campsite in the Uinta National Forest in Utah and killed him. The off ending bear, a 381-pound adult male, subsequently was destroyed by personnel of the Utah Division of Wildlife Resources and USDA/APHIS/Wildlife Services. The tragic incident, raises the number of recorded human fatalities caused by black bears during the period 1900–2007 to about 52. Although deaths caused by large carnivores are rare, the media attention associated with them focuses public concern for the responsibility …
Alien Invaders! On-Site Programming (Grade 6), Discover Mojave: Forever Earth
Alien Invaders! On-Site Programming (Grade 6), Discover Mojave: Forever Earth
Curriculum materials (FE)
In the “Alien Invaders!” program, students investigate how quagga mussels might affect Lake Mead. Students collect water quality data such as clarity, pH, and temperature to determine current habitat conditions that have allowed quagga mussels to thrive in Lake Mead. Students learn about the consequences that quagga mussels could have on the lake and its living and non-living resources. Using the knowledge they’ve gained, students create their own management plans to prevent the spread of quagga mussels to other waterways.
Understanding The Motivations Of Rock Climbers: A Social Worlds Study, Amy Miller Ansari
Understanding The Motivations Of Rock Climbers: A Social Worlds Study, Amy Miller Ansari
UNLV Theses, Dissertations, Professional Papers, and Capstones
Rock climbing affects public lands through erosion, destruction of vegetation, and disturbance to historical sites. Minimum impact messages can help reduce impacts but requires understanding characteristics of the message recipient. The purpose of this study was to understand the motivations of rock climbers to help land managers design more effective minimum impact messages. This study assesses the motivations of rock climbers using a social worlds approach, focusing on the sub-worlds of. traditional climbers, sport climbers, and boulderers. I found that traditional climbers are most motivated to pursue a wilderness experience, climb in a natural wilderness setting, and climb in quiet …
The Balancing Act, David Weaver
The Balancing Act, David Weaver
Conference papers and presentations
Nutrient management is as much a global issue as a local one with a balance required between economics and environment, inherent biological limitations and expectations of nutrient use efficiency, and traditional fertiliser practices and actual enterprise nutrient requirements. The concept of nutrient balance depends on context and scale. Nutrient balance can be considered at a global scale, where issues of nutrient stocks, cycles, depletion and transfer of a particular element are important. For a single farm enterprise, nutrient balance might be considered in terms of phosphorus (P) inputs into and outputs from the enterprise. This is commonly known as a …
State Of The River Report For The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, And Contaminants 2008, Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University
State Of The River Report For The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, And Contaminants 2008, Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University
State of the River Report
No abstract provided.