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Bioacoustic Techniques To Monitor Great Gray Owls Strix Nebulosa In The Sierra Nevada
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Book Synopsis Bioacoustic Techniques to Monitor Great Gray Owls (Strix Nebulosa) in the Sierra Nevada by : Cameron B. Rognan
Download or read book Bioacoustic Techniques to Monitor Great Gray Owls (Strix Nebulosa) in the Sierra Nevada written by Cameron B. Rognan and published by . This book was released on 2007 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Non-invasive Bioacoustic Techniques for Detecting and Monitoring the Sierra Nevada Great Gray Owl (Strix Nebulosa) by : Joseph Robert Rowley Medley
Download or read book Non-invasive Bioacoustic Techniques for Detecting and Monitoring the Sierra Nevada Great Gray Owl (Strix Nebulosa) written by Joseph Robert Rowley Medley and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: California great gray owls are rare, nocturnal, secretive, and have a limited geographic distribution in the Central Sierra Nevada, rendering them a difficult species to study. Current survey methods are time and cost intensive, and require the use of nocturnal broadcast surveys to elicit territorial responses. Using autonomous recording units (ARUs) and acoustic editing software, we investigated the utility of bioacoustic technology as an alternative survey methodology for great gray owls. We conducted ARU sampling at a total of 50 meadow sites divided evenly between Yosemite National Park and Stanislaus National Forest. Half of these sites within each category consisted of sites historically occupied by great gray owls, while the other half consisted of randomly selected but suitable habitat during the spring and summer of 2009. Specifically, our goals were to estimate probabilities of detection for great gray owls using ARUs and compare those estimates with those afforded by the broadcast survey methodology. Additionally, we aimed to quantify sampling design tradeoffs of ARU spacing and recording duration, describe great gray owl vocalization behaviors, and conduct a comparative cost estimation between survey methods. We used a maximum likelihood-based modeling approach to estimate probabilities of detection and occupancy. Estimates of single visit probability of detection for ARUs (0.708) were similar or favorable to those afforded by the broadcast method, with the exception of Stanislaus National Forest random sites, where estimates of probability of detection for ARUs were slightly lower than those from the broadcast method. Under our ARU sampling strategy, and multiple reduced sampling strategies that we analyzed, very high overall probabilities of detection >0.90 could be achieved after two to five nights of sampling. We detected a total of 63,612 great gray owl vocalization events across 24 sample sites. 88% of all vocalization events were detected during the twelve-hour period between 1900 and 0700 hours. Our comparative cost estimate suggests that ARU surveys are more cost effective than broadcast protocol strategies when the number of annual sampling sites exceeds 20, especially in multi-year studies, as the annual cost for ARU sampling decreases significantly once the units have been acquired. Our results indicate that ARUs provide a non-invasive, cost-effective alternative method with comparable estimates of probability of detection to broadcast survey techniques for monitoring the rare and elusive California great gray owl. Additionally, our methods have broader management implications, as they can be applied to monitoring multiple species of birds or other terrestrial vertebrates. We suggest that land managers tasked with monitoring great gray owls and other rare species consider ARUs as a non-invasive monitoring alternative or supplement to methodologies currently in use.
Book Synopsis Assessing Bioacoustic Techniques for Inventory and Monitoring of Forest Owls in the Central Sierra Nevada, California by : Ryan Byrnes
Download or read book Assessing Bioacoustic Techniques for Inventory and Monitoring of Forest Owls in the Central Sierra Nevada, California written by Ryan Byrnes and published by . This book was released on 2013 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight owl species of special concern occur in the Sierra Nevada: California Spotted Owl (Strix occidentalis occidentalis), Northern Spotted Owl (Strix occidentalis caurina), Long-eared Owl (Asio otus), Burrowing Owl (Athene cunicularia), Great Gray Owl (Strix nebulosa nebulosa), Flammulated Owl (Otus flammeolus), Elf Owl (Micrathene whitneyi), and Short-eared Owl (Asio flammeus). Additionally, four other owl species occur in the Sierra Nevada: Great Horned Owl (Bubo virginianus), Northern Pygmy Owl (Glaucidium gnoma), Northern Saw-whet Owl (Aegolius acadicus), and Western Screech Owl (Megascops kennicottii). Outside of the extensive demographic monitoring efforts focused on the California spotted owl and Great Gray Owl, there are no current inventory or monitoring efforts directed at the majority of owl species in the Sierra Nevada.
Book Synopsis Winter Distribution, Habitat Use, and Conservation Status of the Sierra Nevada Great Gray Owl (Strix Nebulosa) by : Eric Paludan Bulow Jepsen
Download or read book Winter Distribution, Habitat Use, and Conservation Status of the Sierra Nevada Great Gray Owl (Strix Nebulosa) written by Eric Paludan Bulow Jepsen and published by . This book was released on 2009 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Central Sierra Nevada great gray owls are facultative, elevational, winter migrants. Access to winter habitat is important to their ecology. Winter observations and remotely sensed habitat variables informed a predictive model of the environmental requirements and geographic distribution of this owl population. Using the modeled distribution map we analyzed habitat variables, ownership, development footprint, and projected development across 20% probability classes. The high probability class (80-100%) was only 0.2% of the total study area. High-probability areas were characterized by Sierran Yellow Pine forest surrounding relatively small, flat areas of grassland, wet meadow, and riparian habitats, within the mid-elevation range. Winter great gray owls preferred undeveloped, wildland areas. The major landowners of the high probability class were United States Forest Service (23%), National Park Service (43%), private landowners (32%), and miscellaneous agencies (2%). Less than 1% of preferred habitat on agency-owned lands was developed, while 38% of preferred habitat on private lands was developed past a rural density. Similarly, projected development involved only private lands, with 44% and 60% of high- and medium-to-high (40-100%) suitability areas respectively developed beyond rural by the year 2040. Our findings indicate that there is a strong overlap in winter areas preferred by great gray owls in the central Sierra Nevada and areas that are currently and projected to be developed in the near future. To ensure population viability of the central Sierra Nevada great gray owl, conservation efforts should prioritize habitat preservation in areas of private ownership that overlap with preferred great gray owl winter habitat.
Book Synopsis Assessing Distribution, Habitat Suitability, and Site Occupancy of Great Gray Owls (Strix Nebulosa) in California by : Carie L. Sears
Download or read book Assessing Distribution, Habitat Suitability, and Site Occupancy of Great Gray Owls (Strix Nebulosa) in California written by Carie L. Sears and published by . This book was released on 2006 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Relationships of Great Gray Owl Prey in Meadows of the Sierra Nevada Mountains by : Ryan S. Kalinowski
Download or read book Habitat Relationships of Great Gray Owl Prey in Meadows of the Sierra Nevada Mountains written by Ryan S. Kalinowski and published by . This book was released on 2012 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Status and Distribution of the Great Gray Owl in California by : Jon Winter
Download or read book Status and Distribution of the Great Gray Owl in California written by Jon Winter and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Status, Distribution and Ecology of the Great Gray Owl (Strix Nebulosa) in California by : Jon Winter
Download or read book Status, Distribution and Ecology of the Great Gray Owl (Strix Nebulosa) in California written by Jon Winter and published by . This book was released on 1986 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Requirements of Great Gray Owls in the Central Sierra Nevada by : Correigh Greene
Download or read book Habitat Requirements of Great Gray Owls in the Central Sierra Nevada written by Correigh Greene and published by . This book was released on 1995 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Further Investigations on the Ecology of the Great Gray Owl in the Central Sierra Nevada by : Jon Winter
Download or read book Further Investigations on the Ecology of the Great Gray Owl in the Central Sierra Nevada written by Jon Winter and published by . This book was released on 1982 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Aspects of the Ecology of the Great Gray Owl in the Central Sierra Nevada by : Jon Winter
Download or read book Some Aspects of the Ecology of the Great Gray Owl in the Central Sierra Nevada written by Jon Winter and published by . This book was released on 1981 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Great Gray Owl (Strix Nebulosa) Surveys on the Payette National Forest by : Eric Atkinson
Download or read book Great Gray Owl (Strix Nebulosa) Surveys on the Payette National Forest written by Eric Atkinson and published by . This book was released on 1989 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Gray Owl written by and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Differences Between Native Great Gray Owls (Strix Nebulosa) and Invasive Barred Owls (S. Varia) on the Dead Indian Plateau of Southern Oregon by : Emily E. Burke
Download or read book Habitat Differences Between Native Great Gray Owls (Strix Nebulosa) and Invasive Barred Owls (S. Varia) on the Dead Indian Plateau of Southern Oregon written by Emily E. Burke and published by . This book was released on 2017 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neotropical Owls by : Paula L. Enriquez
Download or read book Neotropical Owls written by Paula L. Enriquez and published by Springer. This book was released on 2017-07-24 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive biological and ecological information about owls in the neotropic area. In addition the book covers topics such as threats and conservation strategies for these nocturnal birds of prey from 18 Neotropical countries. Owls are a good example of diversification processes and have developed evolutionary characteristics themselves. These species are found almost everywhere in the world but most of them are distributed in tropical areas and about a third of them live in the Neotropics. This biogeographic region has a high biodiversity and even share lineages of species from other continents because at some point all were part of Pangea. Although we still have much to know and understand about this diverse, scarcely studied and threatened group this work aims to be a precedent for future and further research on the subject.
Download or read book Undiscovered Owls written by Magnus Robb and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Pierre Jouventin Publisher :Paul Parey Zeitschriftenverlag GmbH & Company KG ISBN 13 : Total Pages :168 pages Book Rating :4.:/5 (321 download)
Book Synopsis Visual and Vocal Signals in Penguins, Their Evolution and Adaptive Characters by : Pierre Jouventin
Download or read book Visual and Vocal Signals in Penguins, Their Evolution and Adaptive Characters written by Pierre Jouventin and published by Paul Parey Zeitschriftenverlag GmbH & Company KG. This book was released on 1982 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: