Item talk:Q300825
From geokb
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"additionalType": "Journal Article",
"name": "Evidence of disease-related amphibian decline in Colorado",
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"value": "1003693",
"url": "https://pubs.usgs.gov/publication/1003693"
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"value": 1003693
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"value": "10.1016/S0006-3207(02)00239-2",
"url": "https://doi.org/10.1016/S0006-3207(02)00239-2"
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"journal": {
"@type": "Periodical",
"name": "Biological Conservation",
"volumeNumber": "110",
"issueNumber": "3"
},
"inLanguage": "en",
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"name": "Biological Conservation"
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"datePublished": "2003",
"dateModified": "2016-07-15",
"abstract": "The recent discovery of a pathogenic fungus (Batrachochytrium dendrobatidis) associated with declines of frogs in the American and Australian tropics, suggests that at least the proximate cause, may be known for many previously unexplained amphibian declines. We have monitored boreal toads in Colorado since 1991 at four sites using capturea??recapture of adults and counts of egg masses to examine the dynamics of this metapopulation. Numbers of male toads declined in 1996 and 1999 with annual survival rate averaging 78% from 1991 to 1994, 45% in 1995 and 3% between 1998 and 1999. Numbers of egg masses also declined. An etiological diagnosis of chytridiomycosis consistent with infections by the genus Batrachochytrium was made in six wild adult toads. Characteristic histomorphological features (i.e. intracellular location, shape of thalli, presence of discharge tubes and rhizoids) of chytrid organisms, and host tissue response (acanthosis and hyperkeratosis) were observed in individual toads. These characteristics were indistinguishable from previously reported mortality events associated with chytrid fungus. We also observed epizootiological features consistent with mortality events associated with chytrid fungus: an increase in the ratio of female:male toads captured, an apparent spread of mortalities within the metapopulation and mortalities restricted to post metamorphic animals. Eleven years of population data suggest that this metapopulation of toads is in danger of extinction, pathological and epizootiological evidence indicates that B. dendrobatidis has played a proximate role in this process",
"description": "9 p.",
"publisher": {
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"name": "Elsevier"
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"author": [
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"@type": "Person",
"name": "Pessier, Allan P.",
"givenName": "Allan P.",
"familyName": "Pessier"
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"name": "Green, D. Earl david_green@usgs.gov",
"givenName": "D. Earl",
"familyName": "Green",
"email": "david_green@usgs.gov"
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{
"@type": "Person",
"name": "Corn, Paul Stephen",
"givenName": "Paul Stephen",
"familyName": "Corn",
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"url": "https://orcid.org/0000-0002-4106-6335"
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"@type": "Organization",
"name": "U.S. Geological Survey",
"url": "https://www.usgs.gov/"
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"@type": "Person",
"name": "Muths, Erin",
"givenName": "Erin",
"familyName": "Muths",
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"value": "0000-0002-5498-3132",
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"funder": [
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"@type": "Organization",
"name": "Fort Collins Science Center",
"url": "https://www.usgs.gov/centers/fort-collins-science-center"
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{
"@type": "Organization",
"name": "National Wildlife Health Center",
"url": "https://www.usgs.gov/centers/nwhc"
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