{
"USGS Publications Warehouse": {
"@context": "https://schema.org",
"@type": "Article",
"additionalType": "Journal Article",
"name": "Comparison of age determination techniques for female northern pintails and American wigeon in spring",
"identifier": [
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse IndexID",
"value": "70185393",
"url": "https://pubs.usgs.gov/publication/70185393"
},
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"value": 70185393
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],
"journal": {
"@type": "Periodical",
"name": "Wildlife Society Bulletin",
"volumeNumber": "22",
"issueNumber": "2"
},
"inLanguage": "en",
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{
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"name": "Wildlife Society Bulletin"
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],
"datePublished": "1994",
"dateModified": "2017-03-23",
"abstract": "Accurate age-class determination of waterfowl is necessary for studies addressing age-specific effects (e.g., Serie et al., 1992) and age structure of populations (e.g., Raveling and Heitmeyer 1989). Duck ages can be determined in fall by morphological and color characteristics of tertial and tail feathers (Carney 1992); however, these feathers are replaced during fall and winter, thus their characteristics cannot be used in spring (Dane 1968). Other methods used to determine waterfowl age include the presence or absence of the bursa of Fabricius (hereafter bursa; Gower 1939, Hochbaum 1942, Hanson 1949) and characteristics of primary and secondary wing feathers and their coverts (e.g., Wishart 1981, Duncan 1985).",
"description": "5 p.",
"publisher": {
"@type": "Organization",
"name": "Wiley"
},
"author": [
{
"@type": "Person",
"name": "Esler, Daniel desler@usgs.gov",
"givenName": "Daniel",
"familyName": "Esler",
"email": "desler@usgs.gov",
"identifier": {
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"propertyID": "ORCID",
"value": "0000-0001-5501-4555",
"url": "https://orcid.org/0000-0001-5501-4555"
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"@type": "Organization",
"name": "Alaska Science Center Biology MFEB",
"url": "https://www.usgs.gov/centers/alaska-science-center"
},
{
"@type": "Organization",
"name": "Simon Fraser University, Centre for Wildlife Ecology"
},
{
"@type": "Organization",
"name": "Alaska Science Center",
"url": "https://www.usgs.gov/centers/alaska-science-center"
}
]
},
{
"@type": "Person",
"name": "Grand, J. Barry barry_grand@usgs.gov",
"givenName": "J. Barry",
"familyName": "Grand",
"email": "barry_grand@usgs.gov",
"identifier": {
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"value": "0000-0002-3576-4567",
"url": "https://orcid.org/0000-0002-3576-4567"
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"name": "Coop Res Unit Atlanta",
"url": "https://www1.usgs.gov/coopunits/unit/Georgia"
}
]
}
],
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"@type": "Organization",
"name": "Alaska Science Center",
"url": "https://www.usgs.gov/centers/alaska-science-center"
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