Download or read book Spatial Ecology of an Inland Population of the Foothill Yellow legged Frog Rana Boylii in Tehama County California written by Ryan M. Bourque and published by . This book was released on 2008 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Life history and Ecological Aspects of a Population of Foothill Yellow legged Frogs Rana Boylii from Clear Creek Nevada County California written by Thomas James Van Wagner and published by . This book was released on 1996 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identifying Microclimatic and Water Flow Triggers Associated with Breeding Activities of a Foothill Yellow legged Frog Rana Boylii Population on the North Fork Feather River California written by and published by . This book was released on 2008 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foothill Yellow legged Frog Conservation Assessment in California written by and published by . This book was released on 2016 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Amphibian and Reptile Species of Special Concern written by Robert C. Thomson and published by Univ of California Press. This book was released on 2016-06-21 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important hotspots of herpetological biodiversity in the United States, California is home to many endemic amphibians and reptiles found nowhere else on earth. Many of these taxa have unique ecological and morphological specializations, and their management is an important conservation challenge. Increasing climate change impacts, human development, and extreme drought mean many of these species face an ever-greater risk of extinction. California Amphibian and Reptile Species of Special Concern provides an up-to-date synthesis of the current state of knowledge regarding the biology and conservation risks faced by 45 of California’s most sensitive amphibian and reptile species. With the goal of enhancing management based on the best available science, the authors developed a novel set of risk metrics to identify special concern species and the threats they face, including population declines, range size and restrictions, and ecological specializations and niche restrictions. In addition to detailed species accounts, this book provides a quantitative analysis of the conservation status and pressing management issues facing individual species and the state’s amphibian and reptile fauna as a whole. The volume focuses on identifying threats, concrete recommendations for management and recovery, and future research needs. The text is complemented by detailed distribution maps, color photos, and graphs. Written in nontechnical language, California Amphibian and Reptile Species of Special Concern will be a valuable resource to a broad range of users from resource managers, field biologists, and academic herpetologists to students and recreational naturalists. Published in association with the California Department of Fish and Wildlife.
Download or read book Pulsed flow Effects on Foothill Yellow legged Frog Rana Boylii written by and published by . This book was released on 2008 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population level Variation in Vocalizations of Rana Boylii the Foothill Yellow legged Frog written by Courtney S. Silver and published by . This book was released on 2017 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecosystems of California written by Harold Mooney and published by Univ of California Press. This book was released on 2016-01-19 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.
Download or read book Santa Clara Valley Habitat Plan written by and published by . This book was released on 2010 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecohydraulics written by Ian Maddock and published by John Wiley & Sons. This book was released on 2013-07-01 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecohydraulics: An Integrated Approachprovides a research level text which highlights recent developments of this emerging and expanding field. With a focus on interdisciplinary research the text examines:- the evolution and scope of ecohydraulics interactions between hydraulics, hydrology, fluvial geomorphology and aquatic ecology the application of habitat modelling in ecohydraulic studies state of the art methodological developments and approaches detailed case studies including fish passage design and the management of environmental flow regimes research needs and the future of ecohydraulics research The contributions offer broad geographic coverage to encapsulate the wide range of approaches, case studies and methods used to conduct ecohydraulics research. The book considers a range of spatial and temporal scales of relevance and aquatic organisms ranging from algae and macrophytes to macroinvertebrates and fish. River management and restoration are also considered in detail, making this volume of direct relevance to those concerned with cutting edge research and its application for water resource management. Aimed at academics and postgraduate researchers in departments of physical geography, earth sciences, environmental science, environmental management, civil engineering, biology, zoology, botany and ecology; Ecohydraulics: An Integrated Approach will be of direct relevance to academics, researchers and professionals working in environmental research organisations, national agencies and consultancies.
Download or read book Reintroduction of a Declining Amphibian written by Amy Jo Lind and published by . This book was released on 2005 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Heterogeneity of Rana Boylii Habitat written by Sarah Munro Yarnell and published by . This book was released on 2005 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification of Foothill Yellow legged Frog Individuals Through Automated Pattern Recognition written by Orion Kemp Leland and published by . This book was released on 2014 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photographic identification of individuals using natural physical markings provides important information for studying wildlife population demographics. The Foothill Yellow-legged Frog (Rana boylii, FYLF) is a species with unique chin-spot patterns that researchers currently identify through manual comparison of photographs in search of matching markings. However, these commonly employed methods, which can involve manually comparing many hundreds of images, are both time consuming and potentially inaccurate. In this project, we address this problem by defining a process that automates the identification of FYLF individuals from images using MATLAB-based image processing and pattern recognition techniques. We tested the process using replica frogs with patterns based on actual FYLF chin-spot patterns. This method effectively found matches in frogs when the individual spots had complex shapes. However, the process less effectively recognized patterns that were based primarily on spot location. This project provides several valuable tools researchers can use to identify FYLF individuals and can be the foundation for a more optimal system.
Download or read book Temporal Breeding Patterns and Mating Strategy of the Foothill Yellow legged Frog Rana Boylii written by Clara A. Wheeler and published by . This book was released on 2007 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Assessment for the Foothill Yellow legged Frog Rana Boylii in Oregon written by Deanna H. Olson and published by . This book was released on 2009 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Foothill Yellow legged Frog Rana Boylii in Oregon written by Aaron Nicholas Borisenko and published by . This book was released on 1999 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Responses of Foothill Yellow legged Frog Rana Boylii Larvae to an Introduced Predator written by David J. Paoletti and published by . This book was released on 2010 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The consequences of species introductions into non-native habitats are a major cause of concern in the U.S. An introduced species may alter native habitats, cause economic damage, compete with natives for resources or prey on them. Of particular interest are the effects of predation by introduced fishes on native amphibians. Amphibians as a group have been declining worldwide due to a variety of factors, one of which being introduced species. In the Pacific Northwest of the U.S., one example of these declining amphibians is the foothill yellow-legged frog (Rana boylii). In Oregon, R. boylii has disappeared from more than half of its historical sites and is now listed as a state and federal Sensitive Species. Although specific causes have not been determined, declines may be partly attributed to the recent introduction of smallmouth bass (Micropterus dolomieu) to some of the river systems in which these frogs live. Although smallmouth bass have been implicated as a cause of losses, very little is known about interactions between these two species. Given the relatively short period of time these two species have been co-existing, we sought to determine whether R. boylii larvae could even recognize bass as a predatory threat. Through a series of experiments, we examined the behavioral responses of larvae to a variety of stimuli including a native potential predator (rough-skinned newt, Taricha granulosa), introduced predator (smallmouth bass, M. dolomieu), and a native non-predatory fish (speckled dace, Rhinichthys osculus). Each experiment examined a different potential mode of detection: 1) chemical cues only; 2) visual cues only; or 3) a combination of chemical/visual/mechanical cues simultaneously. We predicted that in each experiment, larvae would respond to the native predator by exhibiting antipredator behaviors, whereas those exposed to cues of the non-native, unfamiliar predator would display activity levels similar to larvae exposed to controls. In addition, we tested amphibian larvae from two populations - one where they co-occur with M. dolomieu, and compared them to larvae from a location where M. dolomieu has not yet invaded - to determine whether any antipredator responses observed were recently developed behavioral adaptations. We analyzed initial and overall responses to stimuli. Our analyses of the initial responses of R. boylii larvae revealed an increase in activity when exposed to the visual cues of bass relative to controls. Furthermore, our results suggested that individual R. boylii larvae require multiple cues to facilitate predator detection. When exposed to multiple cues of their native predator, the rough-skinned newt, larvae responded with a significant reduction in activity levels. Those larvae exposed to cues of the non-native predator, smallmouth bass, displayed similar behaviors relative to control cues, supporting our prediction. Consequently, foothill yellow-legged frog larvae appear to be especially vulnerable to predation by non-native smallmouth bass.
