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870 record(s) found.
Papers & Reports Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume II. Virgin Islands National Park
Authors: Kenneth G Rice; Hardin J Waddle; M E Crockett; R R Carthy; H F Percival
Date: 2005 | Outlet: U.S. Geological Survey, Open-File Report 2005-1301, Fort Lauderdale, FL, USA
Amphibian declines and extinctions have been documented around the world, often in protected natural areas. Concern for this alarming trend has focused attention on the need to document all species of amphibians that occur within U.S. National Parks and to search for any signs that amphibians may be declining. This study, an inventory of amphibian...
Papers & Reports Herpetofaunal Inventories of the National Parks of south Florida and the Caribbean: Volume IV. Biscayne National Park
Authors: Kenneth G Rice; Hardin J Waddle; M E Crockett; Christopher D Bugbee; B M Jeffery; H F Percival
Date: 2007 | Outlet: U. S. Geological Survey, Open-File Report 2007-1057, Fort Lauderdale, FL, USA
Amphibian declines and extinctions have been documented around the world, often in protected natural areas. Concern for this alarming trend has prompted the U.S. Geological Survey and the National Park Service to document all species of amphibians that occur within U.S. National Parks and to search for any signs that amphibians may be declining...
Papers & Reports Water-quality and amphibian population data for Maryland, Washington, D.C., and Virginia, 2001-2004
Authors: Karen C Rice; R E Jung
Date: 2004 | Outlet: U.S. Geological Survey Open-File Report 2004-1401: 45
Data on the chemical composition of water and on amphibian populations were collected at least annually from vernal pool and stream sites in Maryland, Washington, D.C., and Virginia from 2001 through 2004.
Papers & Reports Water-quality data at amphibian research sites in Maryland, Washington, D.C., and Virginia, 2005-2007
Authors: Karen C Rice
Date: 2007 | Outlet: U.S. Geological Survey Open-File Report 2008-1204: 12
Data on the chemical composition of water were collected at least once from 47 amphibian research sites in Maryland, Washington, D.C., and Virginia, from 2005 through 2007.
Papers & Reports Three decades of urbanization: estimating the impact of land-cover change on stream salamander populations
Authors: S J Price; M E Dorcas; A L Gallant; R W Klaver; J D Willson
Date: 2006 | Outlet: Biological Conservation 133: 436-441
Papers & Reports Effects of the amphibian chytrid fungus on toad survival
Authors: David S Pilliod; Erin Muths; R D Scherer; Paul E Bartelt; P. Stephen Corn; Blake R Hossack; Brad A Lambert; Rebecca M McCaffery; C Gaughan
Date: 2010 | Outlet: Conservation Biology 24: 1259-1268
Chytridiomycosis is an amphibian disease linked with population declines worldwide, yet there is little information about its effects on the demography of infected populations. We used capture-recapture data from two infected populations and one uninfected population of boreal toads (Bufo boreas) in the Rocky Mountains, U.S.A. to examine a priori...
Papers & Reports Non-native salmonids affect amphibian occupancy at multiple spatial scales
Authors: David S Pilliod; Blake R Hossack; Peter F Bahls; Evelyn L Bull; P. Stephen Corn; G Hokit; B A Maxell; J C Munger; P Murphy; A Wyrick
Date: 2010 | Outlet: Diversity and Distributions 16: 959–974
Aim
The introduction of non-native species into aquatic environments has been linked with local extinctions and altered distributions of native species. We investigated the effect of non-native salmonids on the occupancy of two native amphibians, the long-toed salamander (Ambystoma macrodactylum) and Columbia spotted frog (Rana...
The introduction of non-native species into aquatic environments has been linked with local extinctions and altered distributions of native species. We investigated the effect of non-native salmonids on the occupancy of two native amphibians, the long-toed salamander (Ambystoma macrodactylum) and Columbia spotted frog (Rana...
Papers & Reports Fire and amphibians in North America
Authors: David S Pilliod; Richard B Bury; E J Hyde; Christopher A Pearl; P. Stephen Corn
Date: 2003 | Outlet: Forest Ecology and Management 178: 163–181
Information on amphibian responses to fire and fuel reduction practices is critically needed due to potential declines of species and the prevalence of new, more intensive fire management practices in North American forests. The goals of this review are to summarize the known and potential effects of fire and fuels management on amphibians and...
Papers & Reports Saprolegniaceae identified on amphibian eggs throughout the Pacific Northwest, USA, by internal transcribed spacer sequences and phylogenetic analysis
Authors: J E Petrisko; Christopher A Pearl; David S Pilliod; P P Sheridan; C F Williams; Charles R Peterson; Richard B Bury
Date: 2008 | Outlet: Mycologia 100: 171-180
We assessed the diversity and phylogeny of Saprolegniaceae on amphibian eggs from the Pacific Northwest, with particular focus on Saprolegnia ferax, a species implicated in high egg mortality. We identified isolates from eggs of six amphibians with the internal transcribed spacer (ITS) and 5.8S gene regions and BLAST of the GenBank...
Papers & Reports Geographical information systems and survey designs
Authors: Charles R Peterson; Stephen R Burton; Debra A Patla
Date: 2005 | Outlet: Lannoo M, editor. Amphibian declines: the conservation status of United States species. Berkeley: University of California Press 320–325
A GIS facilitates the organization and visualization of data, and can give biologists a better understanding of their landscapes, as well as identify data gaps. The objective of this paper was to introduce how to use a GIS to design and undertake amphibian surveys. Using Yellowstone National Park as an example, we used GIS to select sampling areas...
Papers & Reports Interspecific amplexus between western North American ranid frogs and the introduced American Bullfrog (Rana catesbeiana): An hypothesis concerning breeding interference
Authors: Christopher A Pearl; Marc P Hayes; R Haycock; J D Engler; Jay Bowerman
Date: 2005 | Outlet: American Midland Naturalist 154: 126–134
Papers & Reports Rana pretiosa, Oregon spotted frog
Authors: Christopher A Pearl; Marc P Hayes
Date: 2005 | Outlet: Lannoo M, editor. Amphibian declines: the conservation status of United States species. Berkeley: University of California Press Pp 577-580
Papers & Reports Rana catesbeiana (American Bullfrog). Chytridiomycosis.
Authors: Christopher A Pearl; David E Green
Date: 2005 | Outlet: Herpetological Review 36: 305-306
Papers & Reports Occurrence of the amphibian pathogen Batrachochytrium dendrobatidis in the Pacific Northwest
Authors: Christopher A Pearl; Evelyn L Bull; David E Green; Jay Bowerman; Michael J Adams; A Hyatt; W H Wente
Date: 2007 | Outlet: Journal of Herpetology 41: 145-149
Chytridiomycosis (infection by the fungus Batrachochytrium dendrobatidis) has been associated with amphibian declines in at least four continents. We report results of disease screens from 210 pond-breeding amphibians from 37 field sites in Oregon and Washington. We detected B. dendrobatidis on 28% of sampled amphibians, and we...
Papers & Reports Feeding behavior and aquatic habitat use by Oregon spotted frogs (Rana pretiosa) in central Oregon
Authors: Christopher A Pearl; Jay Bowerman; D Knight
Date: 2005 | Outlet: Northwestern Naturalist 86: 36-38
Papers & Reports Widespread occurrence of the chytrid fungus Batrachochytrium dendrobatidis on Oregon Spotted Frogs (Rana pretiosa)
Authors: Christopher A Pearl; Jay Bowerman; Michael J Adams; Nathan D Chelgren
Date: 2010 | Outlet: EcoHealth
The pathogen Batrachochytrium dendrobatidis (Bd) has been associated with amphibian declines in multiple continents, including western North America. We investigated Bd prevalence in Oregon spotted frog (Rana pretiosa), a species that has declined across its range in the Pacific Northwest. Polymerase Chain Reaction...
Papers & Reports Observations of rapid colonization of constructed ponds by western toads (Bufo boreas) in Oregon, USA
Authors: Christopher A Pearl; Jay Bowerman
Date: 2006 | Outlet: Western North American Naturalist 66: 397-401
Papers & Reports Characteristics of Columbia spotted frog (Rana luteiventris) oviposition sites in northeastern Oregon
Authors: Christopher A Pearl; Michael J Adams; W H Wente
Date: 2007-01 | Outlet: Western North American Naturalist 67: 86-91
Several western ranid frogs possess a unique strategy of breeding communally over a short temporal window and reusing oviposition sites between years. However, little is published on the characteristics of oviposition sites selected by these explosive breeders. The Columbia spotted frog (Rana luteiventris) is native to northwestern North...
Papers & Reports Behavioral responses of anuran larvae to chemical cues of native and introduced predators in the Pacific Northwestern United States
Authors: Christopher A Pearl; Michael J Adams; G S Schuytema; A V Nebeker
Date: 2003-09-01 | Outlet: Journal of Herpetology 37: 572-576
We compared behavioral responses of three Pacific Northwest anuran larvae from different hydroperiods to water born cues of native and introduced predators. Two native anurans (Pacific treefrog, Pseudacris regilla and northern red-legged frog, Rana aurora aurora) and introduced bullfrogs (Rana catesbeiana) responded to...
Papers & Reports Breeding habitat and local population size of the Oregon spotted frog (Rana pretiosa) in Oregon, USA
Authors: Christopher A Pearl; Michael J Adams; N Leuthold
Date: 2010 | Outlet: Northwestern Naturalist 91
The distribution of the Oregon Spotted Frog (Rana pretiosa) has shrunk markedly and more than 2/3 of known populations are located along the Cascade Range in central Oregon. Despite the conservation concern, little is known about how habitat attributes and stressors such as invasive species influence R. pretiosa populations. We...