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Articles 36811 - 36840 of 42802
Full-Text Articles in Entire DC Network
Winter 1995, Nsu Oceanographic Center
Fall 1995, Nsu Oceanographic Center
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Marine & Environmental Sciences Faculty Articles
Stalks of isocrinid crinoids are differentiated into cirri-bearing columnals (nodals) and columnals lacking cirri (internodals). This skeletal differentiation allowed us to test whether stalk fragmentation is random or whether it occurs preferentially at a specific articulation. Our analyses indicate that the patterns of fragmentation in multicolumnal segments of extant isocrinids collected by submersible, by dredging, and in sediment samples, as well as those found as fossils, are nonrandom. The preferred plane of fragmentation corresponds to the synostosis, the articulation between a nodal and the internodal distal to it. In isocrinids this articulation has a characteristic morphology and is the site …
Coyotes In The Southwest: Frontmatter
Coyotes In The Southwest: Frontmatter
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Includes: Cover, Editors, Sponsors, Steering Committee, Acknowledgements, Printer
Coyotes: A Potential Role In Deer Herd Management?, Robert E. Zaiglin
Coyotes: A Potential Role In Deer Herd Management?, Robert E. Zaiglin
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
White-tailed deer (Odocoileus virginianus) herd control is one of the principal problems faced by private lands game managers. Private landowners unwilling to permit adequate numbers of sport hunters on their lands force deer managers to exercise other harvest strategies, one of which is natural population control by protecting the coyote (Canis latrans). I describe an ongoing case study in South Texas where predation by coyotes may be considered a positive tool in deer population management.
Symposium Proceedings—Coyotes In The Southwest: A Compendium Of Our Knowledge [Complete Work, 185 Pages], Dale Rollins, Calvin Richardson, Terry Blankenship, Kem Canon, Scott Henke
Symposium Proceedings—Coyotes In The Southwest: A Compendium Of Our Knowledge [Complete Work, 185 Pages], Dale Rollins, Calvin Richardson, Terry Blankenship, Kem Canon, Scott Henke
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
This is the complete volume, containing all 40+ articles and presentations. Each article is also hosted here separately under its individual title and authors.
Coyotes: A South Texas Perspective, Rick Sramek
Coyotes: A South Texas Perspective, Rick Sramek
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Coyotes (Canis latrans) are abundant throughout North America, some of the highest densities occur in south Texas. Most studies indicate abundance of food as a contributing factor of coyote density. High coyote populations can lead to localized depredation problems and the current canine rabies epizootic is of concern to residents of south Texas.
Predator Politics In Texas, Bill Sims
Predator Politics In Texas, Bill Sims
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
The coyote (Canis latrans) is certainly one of the most destructive predators affecting the livestock industry, particularly sheep and goats. In fact, title of this session is very appropriate, because when you talk about “politics”, coyotes seem to have more politicians working for them than any other animal.
Predator Politics: Personal Thoughts And Perceptions, Milo J. Shult
Predator Politics: Personal Thoughts And Perceptions, Milo J. Shult
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
My career as an extension wildlife specialist and a university administrator has allowed me to monitor both the public and private sectors' perspectives on coyotes (Canis latrans) and their associated management policies. Selected experiences described herein illustrate the problems (current and future) that characterize emotionally-charged conflicts like those typified by coyote control efforts.
The Livestock Protection Collar For Removing Depredating Coyotes: A Search For Perfect Justice?, Dale Rollins
The Livestock Protection Collar For Removing Depredating Coyotes: A Search For Perfect Justice?, Dale Rollins
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Lethal control techniques for controlling coyotes (Canis latrans) are often maligned as a means for resolving coyote depredations on domestic livestock. With the exception of the Livestock Protection Collar (LPC), lethal control methods (e.g., foot-hold traps and neck snares) lack the ability to specifically remove those coyotes actually preying upon livestock. The LPC capitalizes on attack behavior of coyotes to remove offending individuals. Although currently registered for use in 5 states, LPCs have been used routinely only in Texas. Success with LPCS involves an understanding of coyote behavior and proper targeting of collared livestock. LPCs have been used …
Public Attitudes Toward Predators In Texas, Douglas Reiter, Mark W. Brunson, Robert H. Schmidt
Public Attitudes Toward Predators In Texas, Douglas Reiter, Mark W. Brunson, Robert H. Schmidt
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
A national survey of public attitudes to ward wildlife damage management provided the opportunity to extract a data set from Texas respondents on predator management Texas respondents were generally more supportive of predator control for livestock protection than the rest of the U S., although the overall trends were similar. Lethal technologies scored low on a humaneness scale.
The Re-Establishment Of The Coyote In The Edwards Plateau Of Texas, Gary Lee Nunley
The Re-Establishment Of The Coyote In The Edwards Plateau Of Texas, Gary Lee Nunley
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
In the early 1900s organized predator control was initiated to remove coyotes (Canis latrans) and wolves (C. lupus and C. rufus) from the sheep and goat producing areas of Texas. Operations were begun in the Edwards Plateau, the largest area of sheep concentration. By the 1920s, many of the inner Edwards Plateau counties were considered to be almost free of coyotes and wolves In the 1950s coyotes and wolves were extirpated from most of the Edwards Plateau After a coyote population irruption in the early 1960s, coyotes began to re-establish themselves on the periphery …
Sheep And Goat Losses In Relation To Coyote Damage Management In Texas, Gary Lee Nunley
Sheep And Goat Losses In Relation To Coyote Damage Management In Texas, Gary Lee Nunley
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
The average reported sheep and goat loss to coyotes (Canis latrans) in 1992 on those properties worked by the cooperative animal damage control program were relatively low. Sheep and goat losses were not evenly distributed among the producers. Geographical distribution of the losses reflected a positive relationship between relative coyote density and livestock losses. The sheep and goat industry is adversely affected by the cumulative losses of those producers suffering high levels of predation.
Immunocontraception As A Tool For Controlling Reproduction In Coyotes, Lowell A. Miller
Immunocontraception As A Tool For Controlling Reproduction In Coyotes, Lowell A. Miller
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
The development of immunocontraception as a tool for population management of coyotes (Canis latrans) and reduction of coyote predation may provide an environmentally safer alternative to pesticides. Because they are proteins, immunocontraceptive vaccines do not persist in the environment or bioaccumulate in the food chain. The National Wildlife Research Center (NWRC) will examine the effects (immunological, hormonal and behavioral) of treating penned coyotes with 2 immunocontraceptive vaccines: porcine zona pellucida (PZP) and gonadotropin releasing hormone (GnRH). Initial studies will be conducted using traditional subcutaneous injections; however, the goal IS to develop an orally-deliverable immunocontraceptive vaccine as an alternative …
Managing For Coyotes To Enhance Waterfowl Production: An Alternative Perspective, Terry A. Messmer
Managing For Coyotes To Enhance Waterfowl Production: An Alternative Perspective, Terry A. Messmer
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
The Prairie Pothole Region (PPR) of North America produces about half of the continent's duck population. Predation on hens, young, and eggs severely impacts duck production In the region decreasing fall flights. Recent studies conducted in the region suggest that management efforts to increase duck production need to consider both habitat and predator effects. Research indicates that managing on the landscape level to protect coyotes in sufficient numbers to exclude red foxes should be encouraged in PPR areas suitable for duck production and where the risks of damage to domestic livestock and other wildlife species are minimal.
Coyotes In The Rolling Plains Of Texas, Wyman P. Meinzer
Coyotes In The Rolling Plains Of Texas, Wyman P. Meinzer
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Coyotes (Canis latrans) in the Rolling Plains region of Texas have experienced several factors in the last 40 years that may have possibly influenced population dynamics and feeding niche. The 3 most important changes were (a) the demand for coyote pelts during the 1970s, (b) a region-wide growth of the stocker cattle industry and (c) the increasing incidence of sarcoptic mange. The availability of stocker cattle carcasses may be providing a source of dependable food during a previously stressful period, thus inflating coyote survival and abundance superficially relative to traditional cow/calf ranching areas Sarcoptic mange has been present …
Photographing Coyotes, Wyman P. Meinzer
Photographing Coyotes, Wyman P. Meinzer
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Wildlife photography has become an increasingly popular hobby over the last 10 years. Coyotes (Canis latrans) are among the more difficult animals to photograph under natural field conditions (i.e. in the wild). For studying and photographing coyotes behaving routinely, I recommend the use of a draw station (i.e. cow carcass) and a blind that will all low relatively close inspection of coyote interactions.
Coyotes In Urban Areas: A Status Report, Jan E. Loven
Coyotes In Urban Areas: A Status Report, Jan E. Loven
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Coyotes (Canis latrans) occur within the city limits of most urban areas in Texas, and the Incidence of human X coyote interactions appears to be increasing in recent years. The major damage caused by coyotes in urban areas has been depredation on pets (primarily) and to other animals (e.g. ducks). Direct control of such problem coyotes is often hampered by city/state regulations and/or concern from local officials about negative publicity.
Coyote Population Processes Revisited, Frederick F. Knowlton, Eric M. Gese
Coyote Population Processes Revisited, Frederick F. Knowlton, Eric M. Gese
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
It appears that coyote (Canis latrans) abundance is determined primarily by availability of food (prey) as mediated through social dominance hierarchies and a territorial land tenure system. This is reflected in rates of reproduction, dispersal, and mortality, with survival of juveniles a major factor. Suggestions for a new generation of simulation models to explore coyote population functions are included.
Effects Of Coyote Control On Their Prey: A Review, Scott E. Henke
Effects Of Coyote Control On Their Prey: A Review, Scott E. Henke
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Coyotes (Canis latrans) are often removed from an area because of their predatory nature, regardless of the effect such removal may have on the ecosystem. Research results concerning ecosystem changes due to coyote removal appear ambiguous; however, differing lengths of coyote control can produce different results. Short-term coyote removal efforts (≤ 6 months) typically have not resulted in increases in the prey base; however, long-term, intensive coyote removal reportedly has altered to alter species composition within the ecosystem.
Techniques For Estimating Coyote Abundance, Scott E. Henke, Fred F. Knowlton
Techniques For Estimating Coyote Abundance, Scott E. Henke, Fred F. Knowlton
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Knowledge of coyote abundance is needed to make intelligent management decisions Several methods have been devised to enumerate coyote (Canis latrans) population size. We review several techniques and attempt to identify biases associated with each method. Once biases are understood, recommendations can be made to minimize their impact on data collection processes and yield better estimates of coyote population trends.
Coyotes: A Sheep And Goat Rancher's Perspective, Ellis Helmers
Coyotes: A Sheep And Goat Rancher's Perspective, Ellis Helmers
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
When asked their views about coyotes and coyote damage, the words used by producers to describe their perspectives and comments are less than kind. It is difficult for a producer to find anything good to say about an animal that has cost him so much.
Prescribed Coyote Control To Develop An “Open Window Policy” For Enhancing Deer Survival, Tommy L. Hailey
Prescribed Coyote Control To Develop An “Open Window Policy” For Enhancing Deer Survival, Tommy L. Hailey
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Management of white-tailed deer (Odocoileus virginianus) holds a high priority on many Texas ranches today The use of prescribed aerial control of coyotes to increase white-tailed deer productivity may provide wildlife managers with an economical management tool. I describe two case studies of ranches in the Lower Rolling Plains where prescribed coyote control has increased the deer herds.
Predation Impacts And Management Strategies For Reducing Coyote Damage To Cattle, Rickey L. Gilliland
Predation Impacts And Management Strategies For Reducing Coyote Damage To Cattle, Rickey L. Gilliland
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Loss of cattle to predators influences productivity of many livestock operations. Statistics indicate that coyote (Canis latrans) predation is a principle threat. Impacts to livestock resources by coyotes are appraised. Implementation of control strategies which capitalize on coyote dispersion and social interactions are discussed. Predator management to reduce livestock losses and promote a younger age structure in coyotes is suggested as a long term solution.
Estimating Livestock Losses, Charles Drain
Estimating Livestock Losses, Charles Drain
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Most information published by the Texas Agricultural Statistics Service (TASS) is based on data gathered through a system of Sample Surveys. TASS regularly surveys sampled farms and ranches and agricultural businesses m order to make statistical inference (estimates) for a total population. The alternative to using a sample survey would be to make a complete enumeration or count of the entire population. Both cost and timely results favor the survey approach. This discussion is an attempt to explain the concepts and sampling methods TASS employs in conducting basic surveys, for both inventory and death loss data for cattle, sheep and …
Lethal Options For Controlling Coyotes, John W. Dorsett
Lethal Options For Controlling Coyotes, John W. Dorsett
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Lethal control methods are required to stop coyote depredation or to reduce the coyote population in an area. Various lethal control options are available, including traps, snares, shooting, denning and toxicants. The effectiveness, selectivity, and specificity of each method should be considered before being utilized. Each method requires varying degrees of skill and experience to be made effective. Usually a combination of control methods is most effective in coyote control situations.
The Effects Of Control On Coyote Populations: Another Look, Guy E. Connolly
The Effects Of Control On Coyote Populations: Another Look, Guy E. Connolly
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Population dynamics models are useful for estimating coyote (Canis latrans) population responses to exploitation w well as to hypothetical birth intervention techniques At least 6 coyote simulation models have been developed over the past 25 years. This paper reviews the model developed by Connolly and Longhurst (1975), and identifies some potential improvements based upon new biological information and modem computing technology. The biological concepts embodied in the Connolly–Longhurst (C–L) model seem as valid In 1995 as they were in 1975. Newer studies have tended to reaffirm rather than revise earlier concepts of coyote population mechanics. One significant shortcoming …
The Coyote's Role In A Rabies Epizootic, Keith A. Clark, Pamela J. Wilson
The Coyote's Role In A Rabies Epizootic, Keith A. Clark, Pamela J. Wilson
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
In 1994, the canine rabies epizootic in South Texas was declared a state health emergency; a statewide rabies quarantine was enacted in 1995. Prior to 1988, rabid coyotes (Canis latrans) were reported only infrequently in Texas. In 1988, Stan and Hidalgo Counties, located In extreme South Texas, experienced an epizootic of canine rabies resulting in 11 laboratory-confirmed cases of canine rabies in domestic dogs and 6 cases in coyotes. By 1991, the epizootic had expanded approximately 100 miles north of the US–Mexico border and included 10 counties. During the next 3 % years, 10 additional counties became involved …
Management Of Coyotes For Pronghorn?, S. Kemble Canon
Management Of Coyotes For Pronghorn?, S. Kemble Canon
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
Coyotes (Canis latrans) and pronghorn (Antilocapra americana) have co-existed for thousands of years, but in today's production-oriented society the Pronghorn may need some help periodically. Although pronghorn numbers have rebounded dramatically since the early 20th century, continued management of this species is necessary and may include management of its primarily predator, the coyote. Pronghorn defense mechanisms offer protection from predators, but the coyote's hunting strategies overcome these mechanisms The Trans-Pecos region of Texas holds the greatest numbers of pronghorn In the state. Ranchers in the Trans-Pecos can use predators, such as rainfall; strategies, such as proper …
Interpreting Physical Evidence Of Coyote Predation, James E. Bowns
Interpreting Physical Evidence Of Coyote Predation, James E. Bowns
Coyotes in the Southwest: A Compendium of Our Knowledge (Symposium Proceedings, 1995)
There are situations where it is necessary to determine the cause of death of livestock, game animals, or other wildlife. Criteria used for recognizing predator kills are well known and scientifically documented. These criteria include the attack, killing and feeding behavior of predators as well as the characteristics of their tracks, droppings, and canine teeth size and spacing. Diagnostic criteria for recognizing coyote (Canis latrans), domestic dog, fox (Urocyon cinereoargenteus, Vulpes vulpes), cougar (Felis concolor) , bobcat (Lynx rufus), bear (Ursus spp ), and eagle (mostly Aquila chrysaetos) predation …