Endangered Species Update

Technical environmental journal.

Articles from Vol. 18, No. 4, July-August

A New Approach to Understanding Canid Populations Using an Individual-Based Computer Model: Preliminary Results
Abstract Ensuring the welfare of wild canid populations depends upon the ability to integrate species biology, the environmental aspects upon which those populations depend, and the factors controlling species abundance. Toward this end, we developed...
A Predator-Habitat Assessment for Felids in the Inland Atlantic Forest of Eastern Paraguay: A Preliminary Analysis. (Habitat Issues)
Abstract Jaguar (Panthera onca), puma (Puma concolor), and possibly six species of small cats (ocelot, Leopardus pardalis; margay, Leopardus wiedii; oncilla, Leopardus tigrinus; Geoffroy's cat, Oncifelis geoffroyi, pampas cat, Oncifelis colocolo,...
Bringing Down the Walls. (Opinions)
Educational venues to view, interact, and learn about wildlife occur in many settings, including zoos, preserves, refuges, rehabilitation centers, national parks, and other wild lands. Each human believes his or her venue or political camp to be the...
Canis Soupus: Eastern Wolf Genetics and Its Implications for Wolf Recovery in the Northeast United States. (Canid Conservation)
Abstract Efforts to restore wolves to the northeastern United States have been confounded by a new taxonomic proposal: that the wolf historically inhabiting this region was not, as previously thought, a subspecies of gray wolf commonly called the...
Captivity, Inbreeding, Cross-Lineage Matings, and Body Size in Mexican Wolves. (Canid Conservation)
Abstract The Mexican gray wolf (Canis lupus baileyi) appears to be extinct in the wild and exists now only in captivity and in a single, small reintroduced population. A recent study of captive animals found no evidence for inbreeding depression...
Carnivore Conservation in the Twenty-First Century
The dawn of this new millennium is proving to be an interesting time for carnivores. In some areas predators seem to be rebounding after years of declining populations resulting from habitat loss and human persecution. For example, in this volume,...
Chemical Repellents and Other Aversive Strategies in Predation Management. (Predation Management)
Abstract Chemical repellents and other aversive strategies are the core of non-lethal wildlife management. These strategies typically depend on irritation (pain), conditioning, or fear for their effectiveness, and none is universally successful....
Effectiveness of Livestock Guarding Animals for Reducing Predation on Livestock. (Predation Management)
Abstract Predation is a major problem faced by domestic sheep (Ovis aries) and goat (Capra hircus) producers in the western United States. Producers have been incorporating livestock guarding dogs (Canis familiaris), llamas (Lama glama), and donkeys...
First Swift Fox, Vulpes Velox, Reintroduction in the USA: Results of the First Two Years. (Canid Conservation)
Abstract The swift fox, Vulpes velox, is native only to the great plains of North America. The species was completely eradicated from its Canadian range by 1938, and from over 90% of its range in the USA by 1993. There have been two attempts at...
Gray Wolf Restoration in the Northwestern United States. (Canid Conservation)
Abstract Gray wolf (Canis lupus) populations were eliminated from Montana, Idaho, and Wyoming, as well as adjacent southwestern Canada by the 1930s. After human-caused mortality of wolves in southwestern Canada began to be regulated in the 1960s,...
Historical Attitudes and Images and the Implications on Carnivore Survival. (Opinions)
Abstract This paper examines how mythological images and historical attitudes emerge and influence our interactions with different predator species, such as the grizzly bear (Ursus arctos), cougar (Puma concolor), lynx (Lynx canadensis), wolf (Canis...
Interspecific Interactions among Wild Canids: Implications for the Conservation of Endangered San Joaquin Kit Foxes. (Canid Conservation)
Abstract Interspecific interactions among wild canids have significant implications for the conservation and recovery of endangered San Joaquin kit foxes (Vulpes macrotis mutica). Coyotes (Canis latrans) and non-native red foxes (V. vulpes) both...
Linking Snow Leopard Conservation and People-Wildlife Conflict Resolution: Grassroots Measures to Protect the Endangered Snow Leopard from Herder Retribution. (Felid Conservation)
Abstract Livestock depredation has become a significant problem across the snow leopard's (Panthera uncia) range in Central Asia, being most severe in and near protected areas. Such predation, especially incidents of "surplus killing," in which...
Mapping Occupied Habitat for Forest Carnivores in the American West and Estimating Their Conservation Status. (Habitat Issues)
Abstract Conservation concerns are escalating due to the small numbers, reduced range, and increasingly fragmented distribution of wide-ranging forest carnivores in the American West--specifically the lynx (Lynx canadensis), wolverine (Gulo gulo),...
Molecular Scatology as a Conservation Tool. (Felid Conservation)
Abstract The threat of predation on livestock by large carnivores represents a major impediment to the conservation of intact ecosystems throughout the world. Although it has taken nearly a century to learn the truth about predation on livestock...
Raptors as Vermin: A History of Human Attitudes towards Pennsylvania's Birds of Prey. (Raptor Conservation)
Abstract Many species of raptors (hawks, eagles, and falcons) were considered vermin in Pennsylvania well into mid-twentieth century. Indeed, as recently as the 1930s and 1940s, even eminent conservationists were calling for the elimination of so-called...
Road Density as a Factor in Habitat Selection by Wolves and Other Carnivores in the Great Lakes Region. (Habitat Issues)
Abstract Although wolves (Canis lupus) and many other carnivores are habitat generalists, certain landscape features can be used to predict suitable habitat. Thiel examined the concept of road density as an important factor in the persistence of...
Status and Conservation of Endangered Cats along the U.S.-Mexico Border. (Felid Conservation)
Abstract This paper reviews the research and conservation projects associated with the Bordercats Working Group, a group of scientists and advocates concerned with the status of neotropical cats in northern Mexico and the American Southwest. For...
Status of the California Condor and Mortality Factors Affecting Recovery. (Raptor Conservation)
Abstract The California Condor Recovery Program (Program) is moving forward after the release of 116 California condors (Gymnogyps californianus) to southern and central California and northern Arizona. As of February 1, 2001 a total of 161 condors...
The Feasibility of Gray Wolf Reintroduction to the Grand Canyon Ecoregion. (Canid Conservation)
Abstract As part of a regional conservation planning initiative, this study is being undertaken to determine the biophysical and socioeconomic feasibility of reestablishing a top carnivore, the gray wolf (Canis lupus), in the Grand Canyon Ecoregion...
Theory and Methods in Carnivore Conservation: Who Limits Whom: Predators or Prey?
Abstract Animal populations can be limited by the availability of food (limited from the bottom of the food chain up), by predators (limited from the top of the food chain down), or by the interaction of these two processes. Whether carnivores,...
The Status of the Wolf Population in Post-Soviet Kyrgyzstan. (Canid Conservation)
Abstract The countries that made up the former Soviet Union are home to the largest existing wild gray wolf (Canis lupus) population. This makes the status of wolves in these areas of particular importance. Kyrgyzstan is a former Soviet republic...