@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/755aca41-1475-4829-89b6-af9be8818149> a dcat:Dataset ;
    dct:description "Monitoring of vitamin B1 (thiamine) in the eggs of lake trout (Salvelinus namaycush) collected from lakes Huron and Michigan has been conducted by the U.S. Geological Survey since the mid-1990’s.  The results of this monitoring effort have been used by natural resource management agencies and native American tribes within the Great Lakes basin to evaluate the reproductive health of lake trout.  The data in this release are the thiamine concentrations measured in lake trout collected from 1996-2018.  Results are reported as total thiamine (nmol/g-egg), collection site, lake, year collected, and reference to the analysis methods." ;
    dct:identifier "USGS:5dea990ce4b02caea0f06e75" ;
    dct:issued "2025-11-22T17:58:08.389105"^^xsd:dateTime ;
    dct:modified "20200820"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-88.3740 41.2282, -88.3740 46.4227, -79.6509 46.4227, -79.6509 41.2282, -88.3740 41.2282))"^^gsp:wktLiteral ] ;
    dct:title "Total thiamine concentrations in lake trout Salvelinus namaycush eggs in lakes Huron and Michigan, 1996-2018" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Donald E Tillitt" ;
            vcard:hasEmail <mailto:dtillitt@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/755aca41-1475-4829-89b6-af9be8818149/resource/47dcc0eb-7c91-4952-9be8-9aa953a3b053>,
        <https://data.amerigeoss.org/dataset/755aca41-1475-4829-89b6-af9be8818149/resource/f25d630a-af05-4ed9-bfde-467802434a50> ;
    dcat:keyword "alewife",
        "amerigeo",
        "amerigeoss",
        "aquatic-biology",
        "aquatic-ecosystems",
        "biota",
        "canada",
        "ckan",
        "commercial-fishery-resources",
        "early-mortality-syndrome",
        "ecosystem-monitoring",
        "ems",
        "environmental-assessment",
        "fish",
        "fish-spawning-and-larval-aggregation",
        "fisheries-biology",
        "fishery-management",
        "freshwater-ecosystems",
        "geo",
        "geoss",
        "great-lakes",
        "hazards",
        "health-and-disease",
        "illinois",
        "indiana",
        "inland-fishery-resources",
        "lake-huron",
        "lake-michigan",
        "lake-trout",
        "laurentian-great-lakes",
        "long-term-ecological-monitoring",
        "michigan",
        "national",
        "north-america",
        "ontario",
        "population-and-community-ecology",
        "recreational-fishery-resources",
        "risk-assessment",
        "salvelinus-namaycush",
        "tdc",
        "thiamine",
        "thiamine-deficiency",
        "thiamine-deficiency-complex",
        "united-states",
        "usgs-5dea990ce4b02caea0f06e75",
        "vitamin-b1",
        "vitamin-deficiency",
        "wildlife-disease",
        "wisconsin" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/755aca41-1475-4829-89b6-af9be8818149/resource/47dcc0eb-7c91-4952-9be8-9aa953a3b053> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:57:35.773148"^^xsd:dateTime ;
    dct:modified "2025-11-22T17:58:08.365795"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9W3MUTU> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/755aca41-1475-4829-89b6-af9be8818149/resource/f25d630a-af05-4ed9-bfde-467802434a50> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:57:35.773136"^^xsd:dateTime ;
    dct:modified "2025-11-22T17:58:08.365383"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5dea990ce4b02caea0f06e75.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .