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Wildlife Demography compiles the multitude of available estimation techniques based on sex and age data, and presents these varying techniques in one organized, unified volume. Designed to guide researchers to the most appropriate estimator based upon their particular data set and the desired level of study precision, this book provides quantitative consideration, statistical models, estimator variance, assumptions and examples of use.The authors focus on estimation techniques using sex and age ratios because this data is relatively easy to collect and commonly used by wildlife management * Applicable to a wide array of wildlife species, including game and non-game birds and mammals * Features more than 100 annotated examples illustrating application of statistical methods* Includes more than 640 references of the analysis of nontagging data and the factors that may influence interpretation* Derives historical and ad hoc demographic methods in a modern statistical framework

Although deforestation and forest degradation have long been considered the most significant threats to tropical biodiversity, across Southeast Asia (Northeast India, Indochina, Sundaland, Philippines) substantial areas of natural habitat have few wild animals (>1 kg), bar a few hunting-tolerant species. To document hunting impacts on vertebrate populations regionally, we conducted an extensive literature review, including papers in local journals and reports of governmental and nongovernmental agencies. Evidence from multiple sites indicated animal populations declined precipitously across the region since approximately 1980, and many species are now extirpated from substantial portions of their former ranges. Hunting is by far the greatest immediate threat to the survival of most of the region's endangered vertebrates. Causes of recent overhunting include improved access to forests and markets, improved hunting technology, and escalating demand for wild meat, wildlife-derived medicinal products, and wild animals as pets. Although hunters often take common species, such as pigs or rats, for their own consumption, they take rarer species opportunistically and sell surplus meat and commercially valuable products. There is also widespread targeted hunting of high-value species. Consequently, as currently practiced, hunting cannot be considered sustainable anywhere in the region, and in most places enforcement of protected-area and protected-species legislation is weak. The international community's focus on cross-border trade fails to address overexploitation of wildlife because hunting and the sale of wild meat is largely a local issue and most of the harvest is consumed in villages, rural towns, and nearby cities. In addition to improved enforcement, efforts to engage hunters and manage wildlife populations through sustainable hunting practices are urgently needed. Unless there is a step change in efforts to reduce wildlife exploitation to sustainable levels, the region will likely lose most of its iconic species, and many others besides, within the next few years. Aunque la deforestación y la degradación de los bosques han sido consideradas durante largo tiempo como las amenazas más significativas para la biodiversidad tropical, a lo largo del sureste asiático (noreste de India, Indochina, Sondalandia, Filipinas) hay áreas sustanciales de hábitat natural que tienen algunos animales silvestres (>1 kg), excluyendo a algunas especies tolerantes a la caza. Para documentar los impactos regionales de la caza sobre las poblaciones de vertebrados realizamos una revisión extensiva de la literatura, incluyendo artículos de revistas locales y reportes de agencias gubernamentales y no gubernamentales. La evidencia de los múltiples sitios indicó que las poblaciones animales declinaron precipitosamente en la región desde aproximadamente 1980 y que muchas especies ahora están extirpadas de porciones sustanciales de sus extensiones previas. La caza es por mucho la mayor amenaza inmediata para la supervivencia de la mayoría de los vertebrados en peligro de la región. Las causas del exceso reciente de caza incluyen el acceso mejorado a los bosques y a los mercados, tecnología mejorada de caza, productos medicinales derivados de la vida silvestre y los animales silvestres como mascotas. Aunque los cazadores generalmente toman a especies comunes, como los cerdos y las ratas, para su propio consumo, también toman especies raras de manera oportuna y venden la carne excedente y los productos de valor comercial. También existe una extensa caza enfocada en especies de alto valor. En consecuencia, como es practicada actualmente, la caza no puede considerarse sustentable en ningún lugar de la región y en la mayoría de las localidades la aplicación de la legislación de áreas y especies protegidas es débil. El enfoque de la comunidad internacional sobre el mercado transfronterizo falla en abordar la sobreexplotación de la vida silvestre porque la caza y la venta de la carne salvaje son en general un asunto local y la mayoría es consumida en las aldeas, pueblos rurales y ciudades cercanas. Además de una aplicación mejorada, los esfuerzos por involucrar a los cazadores y por manejar las poblaciones de vida silvestre por medio de prácticas de caza sustentable son una necesidad urgente. A menos que haya un cambio de paso en los esfuerzos por reducir la explotación de la vida silvestre a niveles sustentables, la región probablemente pierda la mayoría de sus especies icónicas, además de muchas otras, en el transcurso de los próximos años.

\"Conventional wisdom is that wild animals are being wiped out. But conventional wisdom skips some important details. Wildlife is rebounding. Not everywhere. Not every species. But a handful of wildlife populations have reached numbers unimaginable in a century. Red deer in Europe, bison in North America, humpback whales in the Atlantic. They have all seen their populations explode. They are back from the brink, numbering in the tens, or even hundreds, of thousands. Their return thrills those who have rooted for their recovery. It terrifies those who grew comfortable without them. This book tracks-and tries to understand-these dramatic rebounds. It shines a light on species returning to forests and farms, prairies and oceans, rivers and cities. It asks how these transformations can be happening and what they have to teach\"-- Provided by publisher.

The open‐data scientific philosophy is being widely adopted and proving to promote considerable progress in ecology and evolution. Open‐data global data bases now exist on animal migration, species distribution, conservation status, etc. However, a gap exists for data on population dynamics spanning the rich diversity of the animal kingdom world‐wide. This information is fundamental to our understanding of the conditions that have shaped variation in animal life histories and their relationships with the environment, as well as the determinants of invasion and extinction. Matrix population models (MPMs) are among the most widely used demographic tools by animal ecologists. MPMs project population dynamics based on the reproduction, survival and development of individuals in a population over their life cycle. The outputs from MPMs have direct biological interpretations, facilitating comparisons among animal species as different as Caenorhabditis elegans, Loxodonta africana and Homo sapiens. Thousands of animal demographic records exist in the form of MPMs, but they are dispersed throughout the literature, rendering comparative analyses difficult. Here, we introduce the COMADRE Animal Matrix Database, an open‐data online repository, which in its version 1.0.0 contains data on 345 species world‐wide, from 402 studies with a total of 1625 population projection matrices. COMADRE also contains ancillary information (e.g. ecoregion, taxonomy, biogeography, etc.) that facilitates interpretation of the numerous demographic metrics that can be derived from its MPMs. We provide R code to some of these examples. Synthesis: We introduce the COMADRE Animal Matrix Database, a resource for animal demography. Its open‐data nature, together with its ancillary information, will facilitate comparative analysis, as will the growing availability of databases focusing on other aspects of the rich animal diversity, and tools to query and combine them. Through future frequent updates of COMADRE, and its integration with other online resources, we encourage animal ecologists to tackle global ecological and evolutionary questions with unprecedented sample size.

Every day, biologists in parkas, raincoats, and rubber boots go into the field to capture and mark a variety of animal species. Back in the office, statisticians create analytical models for the field biologists' data. But many times, representatives of the two professions do not fully understand one another's roles. This book bridges this gap by helping biologists understand state-of-the-art statistical methods for analyzing capture-recapture data. In so doing, statisticians will also become more familiar with the design of field studies and with the real-life issues facing biologists. Reliable outcomes of capture-recapture studies are vital to answering key ecological questions. Is the population increasing or decreasing? Do more or fewer animals have a particular characteristic? In answering these questions, biologists cannot hope to capture and mark entire populations. And frequently, the populations change unpredictably during a study. Thus, increasingly sophisticated models have been employed to convert data into answers to ecological questions. This book, by experts in capture-recapture analysis, introduces the most up-to-date methods for data analysis while explaining the theory behind those methods. Thorough, concise, and portable, it will be immensely useful to biologists, biometricians, and statisticians, students in both fields, and anyone else engaged in the capture-recapture process.

Climate-mediated changes in thermal stress can destabilize animal populations and promote extinction risk. However, risk assessments often focus on changes in mean temperatures and thus ignore the role of temporal variability or structure. Using Earth System Model projections, we show that significant regional differences in the statistical distribution of temperature will emerge over time and give rise to shifts in the mean, variability and persistence of thermal stress. Integrating these trends into mathematical models that simulate the dynamical and cumulative effects of thermal stress on the performance of 38 globally distributed ectotherm species revealed complex regional changes in population stability over the twenty-first century, with temperate species facing higher risk. Yet despite their idiosyncratic effects on stability, projected temperatures universally increased extinction risk. Overall, these results show that the effects of climate change may be more extensive than previously predicted on the basis of the statistical relationship between biological performance and average temperature.The authors project changes in mean thermal stress, as well as its persistence and variability. They show complex impacts on species stability but universal increases in extinction risk, and highlight the need to go beyond average-temperature-based projections of biological performance.