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

<https://data.amerigeoss.org/dataset/f41c6676-1a73-4108-9ae2-6a46e20a55c8> a dcat:Dataset ;
    dct:description "As part of its Wildlife Inventory Plan program, in 2000 the Alaska Peninsula/Becharof NWR (Refuge) initiated a program to monitor adult bald eagle population levels along the Alaska Peninsula Gulf Coast. Survey methods followed procedures established by Migratory Bird Management (MBM) and sampling design initiated during a survey conducted in 1983. In 1983 MBM Pilot/Biologist Hodges surveyed 40 plots; in 2000 we surveyed these original 40 plots plus 10 more plots within the Refuge boundary. From 17 to 24 April 2005 we surveyed the same 50 plots. The total population index from Cape Douglas to Unimak Island was 2,168 + 530 (24%) adult eagles. The immature eagle population index was 435 + 297 (68%) immature eagles. Although the adult population index decreased from 2000 and the immature population index increased from 2000 neither difference was statistically significant. The number of occupied nests also did not differ statistically between 2000 and 2005 (132 occupied nests in 2000 vs. 114 occupied nests in 2005). In 2005, we used a new method to estimate detection rates for adult bald eagles. Detection rates have not been previously estimated for bald eagle surveys in open habitats such as those found on the Alaska Peninsula. Our method of estimating the detection rate used subjective estimates of the detection probabilities for each adult eagle to build a presumed detection probability distribution. The left seat observer subjectively assigned a probability, to the nearest 1/10, of detection to every eagle sighting. Assuming this distribution to be true led to a correction factor for increasing the Peterson estimate of eagles missed by both observers. Our total adult eagle population estimate should be increased by 28 percent to account for the eagles missed, yielding an adjusted index of 2,775 adult eagles. In addition to the bald eagle observations, we report on observations of other raptors, and large terrestrial and sea mammals made during the survey." ;
    dct:identifier "f41c6676-1a73-4108-9ae2-6a46e20a55c8" ;
    dct:issued "2025-12-02T06:14:39.746611"^^xsd:dateTime ;
    dct:modified "2025-12-02T06:14:39.746615"^^xsd:dateTime ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:title "Bald Eagle survey" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Brent Frakes" ;
            vcard:hasEmail <mailto:brent_frakes@fws.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/f41c6676-1a73-4108-9ae2-6a46e20a55c8/resource/177f1383-8162-4270-a553-8b0575befeca> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "geo",
        "geoss",
        "national",
        "north-america",
        "united-states" .

<https://data.amerigeoss.org/dataset/f41c6676-1a73-4108-9ae2-6a46e20a55c8/resource/177f1383-8162-4270-a553-8b0575befeca> a dcat:Distribution ;
    dct:description "Bald Eagle survey" ;
    dct:format "PDF" ;
    dct:issued "2018-06-09T00:32:48.162838"^^xsd:dateTime ;
    dct:modified "2025-12-02T06:14:39.740693"^^xsd:dateTime ;
    dct:title "264_EagleReport FINAL2005.pdf" ;
    dcat:accessURL <https://ecos.fws.gov/ServCat/DownloadFile/129017?Reference=84792> ;
    dcat:mediaType "application/pdf" .

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