@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/13d10546-4fa3-47da-8daf-489ff75ea77b> a dcat:Dataset ;
    dct:description "Egg mat retention trials were conducted with walleye (Stizostedion vitreum) and lake whitefish (Coregonus clupeaformis) eggs in an experimental flume tank, seeded directly on egg mats (test retention efficiency) and hand dispersed in flowing flume water to simulate spawning over egg mats (test capture efficiency) with and without alternate substrate. In the field study, we measured number of eggs collected on mats and with bottom drift nets in the Detroit River to compare capture effectiveness. The field collection data describe the number, date of collection, and exact collection location of target species (walleye and lake whitefish). The flume trial data include number of eggs retained or collected, water velocity, and substrate during the flume trials." ;
    dct:identifier "USGS:61b796fdd34e78124560f87a" ;
    dct:issued "2025-11-20T02:46:41.272989"^^xsd:dateTime ;
    dct:modified "20220413"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-83.1325 41.5579, -83.1325 44.1349, -82.3755 44.1349, -82.3755 41.5579, -83.1325 41.5579))"^^gsp:wktLiteral ] ;
    dct:title "Fish Egg Retention on Egg Mats in Experimental Flumes and Targeted Field Gear Egg Collection in the Detroit River, 2015-2016" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Edward Roseman" ;
            vcard:hasEmail <mailto:eroseman@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/13d10546-4fa3-47da-8daf-489ff75ea77b/resource/732d51d9-3008-4833-811e-1bca670c1962>,
        <https://data.amerigeoss.org/dataset/13d10546-4fa3-47da-8daf-489ff75ea77b/resource/d947ad3e-56c1-46ff-9b53-ce29b61d8d0a> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "biological-sampling",
        "biota",
        "ckan",
        "coregonus-clupeaformis",
        "detroit-river",
        "eggs",
        "environment",
        "field-inventory-and-monitoring",
        "fish-eggs",
        "fishery-management",
        "fishery-resources",
        "fishes",
        "freshwater-ecosystems",
        "gear-efficiency",
        "geo",
        "geoss",
        "inlandwaters",
        "lake-whitefish",
        "maumee-river",
        "national",
        "north-america",
        "river-systems",
        "saginaw-bay",
        "sander-vitreus",
        "stizostedion-vitreum",
        "united-states",
        "usgs-61b796fdd34e78124560f87a",
        "walleye" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/13d10546-4fa3-47da-8daf-489ff75ea77b/resource/732d51d9-3008-4833-811e-1bca670c1962> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:44:38.014036"^^xsd:dateTime ;
    dct:modified "2025-11-20T02:46:41.257013"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.61b796fdd34e78124560f87a.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/13d10546-4fa3-47da-8daf-489ff75ea77b/resource/d947ad3e-56c1-46ff-9b53-ce29b61d8d0a> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:44:38.014043"^^xsd:dateTime ;
    dct:modified "2025-11-20T02:46:41.257474"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P96H1ZBC> ;
    dcat:mediaType "application/http" .

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