Download or read book Overwintering of the Oregon Spotted Frog Rana Pretiosa at Conboy Lake National Wildlife Refuge Klickitat County Washington 2000 2001 written by Marc P. Hayes and published by . This book was released on 2005 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amphibian Declines written by Michael J. Lannoo and published by Univ of California Press. This book was released on 2005-06-15 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documents in comprehensive detail a major environmental crisis: rapidly declining amphibian populations and the disturbing developmental problems that are increasingly prevalent within many amphibian species.
Download or read book Telemetry Study of Fall and Winter Oregon Spotted Frog rana Pretiosa Movement and Habitat Use at Trout Lake Klickitat County Washington written by Lisa Hallock and published by . This book was released on 2001 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Inventory of Oregon Spotted Frogs Rana Pretiosa in the Upper Black River Drainage Thurston County Washington written by Kelly R. McAllister and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of the Columbia Spotted Frog in Northeastern Oregon written by Evelyn L. Bull and published by . This book was released on 2005 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Columbia spotted frog (Rana luteiventris) is one of several amphibians in the Western United States experiencing population declines. The breeding, postbreeding, and overwintering habitat and ecology of this species were investigated in 10 study sites in northeastern Oregon from 1997 through 2004. A variety of habitats with permanent water were used as breeding sites and as postbreeding habitat during the summer. Ice-covered ponds, warm springs, rivers, and seeps in forested habitats were used for overwintering. Diet consisted of a wide variety of mollusks and arthropods with beetles, ants, wasps, and flies composing more than 50 percent. Population size was as high as 135 females at one site, and ratios of males to females ranged from 1.0 to 2.8. The oldest male and female were 9.7 and 8.7 years old, respectively, based on skeletochronology. Males reached sexual maturity at 1 year 9 months after metamorphosis and most females at 2 years 9 months after metamorphosis. One female laid eggs in up to 3 consecutive years. Size (snout-vent length) was not a good indicator of age in frogs older than 2 years. Long-term monitoring is necessary to determine the effects of a variety of disturbance factors and chytrid fungus that could influence spotted frog populations in northeastern Oregon.
Download or read book Draft Recovery Plan for Oregon Spotted Frog Rana Pretiosa written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of a Remnant Population of Oregon Spotted Frogs Rana Pretiosa in Thurston County Washington written by James Ward Watson and published by . This book was released on 2000 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Washington State Status Report for the Oregon Spotted Frog written by Kelly R. McAllister and published by . This book was released on 1997 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oregon Spotted Frog Rana Pretiosa Habitat Use and Herbage or Biomass Removal from Grazing at Jack Creek Klamath County Oregon written by Amie M. Shovlain and published by . This book was released on 2005 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: We evaluated the effects of herbage removal from livestock grazing on Oregon spotted frog (Rana pretiosa) habitat use by monitoring frog locations in grazed and matched ungrazed treatments across a range of grazing intensities at Jack Creek, Fremont-Winema National Forest, Oregon. Thirteen cattle exclosures were deployed along Jack Creek in the summer of 2003. Movements were monitored using radio telemetry on adult frogs (N = 24 frogs) within treatments sites from July through October 2004. Individual frogs were located 1 to 28 times ([mean]=11.7) and were tracked from 1 to 74 days [mean]=35.8 days). A 10-pinpoint intercept frame was used to estimate relative differences in removed vegetation cover. This difference between ungrazed treatments and paired grazed controls was used as a measure of grazing pressure at treatment sites, and examined in relation to frog habitat preference. Pin measurements ranged from an average monthly difference of -1.2 to 2.97 pin hits between an exclosure and its control. As pin differences increased by one unit, the odds of finding a frog in the exclosure increased by a factor of 1.62 (F1, 4 = 3.90, p = 0.05) with an approximate 95% confidence interval of 1.00 to 2.74. Based on the proportion of time frogs spent inside exclosures, there was evidence that as grazing pressure increased, frogs preferred ungrazed livestock exclosures. Secondary objectives of this study were to describe migration routes and identify overwintering sites of the R. pretiosa population on Jack Creek. From August to mid-December 2003, frogs (N = 36) were tracked from 5 to 92 days ([mean] = 49.5 days) and located 2 to 39 times ([mean] = 23.2 times). In mid-October, individuals were located in sheltered areas along the creek such as willow root complexes and abandoned beaver runs. Frogs also were found in deep (130 cm) pools associated with active springs and individuals in these areas were active within the pools under 5 cm of ice. Using mark-recapture techniques and deployment of cattle exclosures, we examined 1) frog migration and 2) grazing effects on frog habitat use for the Jack Creek R. pretiosa population in 2003-2004. Ultimately, a more complete understanding of the natural history of this species and how anthropogenic activities affect amphibians such as R. pretiosa will aid managers in mitigating potential adverse affects, especially in riparian systems, and contribute to recovery and restoration strategies.
Download or read book Oregon Spotted Frog Rana Pretiosa Movement and Demography at Dilman Meadow written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Movements Habitat Selection and Population Characteristics of a Remnant Population of Oregon Spotted Frogs rana Pretiosa in Thurston County Washington written by and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Strategy for the Oregon Spotted Frog Rana Pretiosa in British Columbia written by Canadian Oregon Spotted Frog Recovery Team and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Impacts of a Novel Predator written by and published by . This book was released on 2017 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: The decline of the Oregon Spotted Frog (Rana pretiosa), a Pacific Northwest endemic now federally listed as threatened, has been attributed to several aspects of ecosystem alteration, primarily habitat degradation and loss. The introduced American Bullfrog (Rana (Aquarana) catesbeiana) has been widely implicated in those declines, but the basis of that contention has been difficult to characterize. The bullfrog occurring at every site of recent Oregon Spotted Frog extirpation has focused concern about its impact. Here, I present a suite of interconnected studies that examine the behavioral ecology of both species to better understand the potential for bullfrog-mediated Oregon Spotted Frog extirpation. I quantified Oregon Spotted Frog anti-predator behavior from the only known population successfully co-occurring with bullfrogs (Conboy Lake) and a population devoid of bullfrog impact (Big Marsh), and compared these behaviors to the predatory traits of the bullfrog. The initial study revealed that captive-reared individuals from the Oregon Spotted Frog population that has successfully co-occurred with bullfrogs respond faster to a predatory stimulus (measured as latency to response) than Oregon Spotted Frogs from a population not to exposed to bullfrogs. Subsequent field investigations of the approach distance allowed by a predator stimulus before taking evasive action (termed the flight initiation distance: FID) conducted with the Oregon Spotted Frog population co-occurring with bullfrogs first demonstrated that FID of recently metamorphosed bullfrogs is consistently greater than that of recently metamorphosed Oregon Spotted Frogs. Further, examination of FID across all post-metamorphic age classes of Oregon Spotted Frogs revealed that older frogs do not allow as close approach as recently metamorphosed Oregon Spotted Frogs. This age class shift in FID did not occur in the Oregon Spotted Frog population not exposed to bullfrogs. In the latter population, FID did not differ among age classes. Since the bullfrog might be driving this age-based change in anti-predator behavior, I explored the variation in strike distance of bullfrogs from the site of co-occurrence in both the field and laboratory to determine the extent of overlap with Oregon Spotted Frog FID. I found that the bullfrog strike distance significantly overlaps the FID of all ages of Oregon Spotted Frogs from the bullfrog-free site but only that of youngest (recently metamorphosed) frogs at the site of co-occurrence. Older Oregon Spotted Frogs from the site of co-occurrence generally escaped at distances greater than the strike distance of bullfrogs. Collectively, these studies strongly suggest that bullfrogs have altered the escape behavior of Oregon Spotted Frogs at Conboy Lake and that most adult Oregon Spotted Frogs at Conboy may have a size-based release from predation by bullfrogs. Implicit in this finding is that bullfrogs may pose a real threat via predation to other Oregon Spotted Frog populations with which they might come into contact where the distribution of bullfrog body sizes differ substantially from that at Conboy Lake.
Download or read book Endangered and Threatened Species Designation of Critical Habitat for the Oregon Spotted Frog Us Fish and Wildlife Service Regulation Fws 2018 Edition written by The Law The Law Library and published by Createspace Independent Publishing Platform. This book was released on 2018-10-24 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endangered and Threatened Species - Designation of Critical Habitat for the Oregon Spotted Frog (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) The Law Library presents the complete text of the Endangered and Threatened Species - Designation of Critical Habitat for the Oregon Spotted Frog (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition). Updated as of May 29, 2018 We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Oregon spotted frog (Rana pretiosa) under the Endangered Species Act. In total, approximately 65,038 acres (26,320 hectares) and 20.3 river miles (32.7 river kilometers) in Whatcom, Skagit, Thurston, Skamania, and Klickitat Counties in Washington, and Wasco, Deschutes, Klamath, Lane, and Jackson Counties in Oregon, fall within the boundaries of the critical habitat designation. The effect of this regulation is to designate critical habitat for the Oregon spotted frog under the Endangered Species Act. This book contains: - The complete text of the Endangered and Threatened Species - Designation of Critical Habitat for the Oregon Spotted Frog (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) - A table of contents with the page number of each section
Download or read book Oregon Spotted Frog Rana Pretiosa written by British Columbia. Ministry of Environment, Lands, and Parks and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Short term Occupancy and Abundance Dynamics of the Oregon Spotted Frog Rana Pretiosa Across Its Core Range written by and published by . This book was released on 2014 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Oregon spotted frog (Rana pretiosa) occupies only a fraction of its original range and is listed as Threatened under the Endangered Species Act. We surveyed 93 sites in a rotating frame design (2010-13) in the Klamath and Deschutes Basins, Oregon, which encompass most of the species' core extant range. Oregon spotted frogs are declining in abundance and probability of site occupancy. We did not find an association between the probability that Oregon spotted frogs disappear from a site (local extinction) and any of the variables hypothesized to affect Oregon spotted frog occupancy. This 4-year study provides baseline data, but the 4-year period was too short to draw firm conclusions. Further study is essential to understand how habitat changes and management practices relate to the status and trends of this species.
Download or read book Food Habits of the Spotted Frog Rana Pretiosa from Managed Sites in Grant County Oregon written by and published by . This book was released on 1983 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
