@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://metadata.macmatlas.net/dataset/98d58c65-09a1-48ec-b669-443217b5bc17> a dcat:Dataset ;
    dct:description "This dataset contains active acoustic observations acquired using a Simrad EK80 Scientific Split-Beam Echo Sounder with keel-mounted transducers operating at 18, 38, 70, 120, 200, and 333 kHz, as well as multibeam data collected with a Kongsberg EM 710 Multibeam Echo Sounder. EK80 data were processed to derive acoustic backscatter measurements and classify targets into predefined acoustic categories for biomass estimation. The EM 710 data provide detailed bathymetric and seabed backscatter information. The combined dataset can be used for fisheries resource assessment, biomass estimation, seafloor characterization, habitat mapping, and marine ecosystem research." ;
    dct:identifier "98d58c65-09a1-48ec-b669-443217b5bc17" ;
    dct:issued "2026-05-31T20:24:00.459631"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-06-04T07:34:27.902809"^^xsd:dateTime ;
    dct:publisher <https://metadata.macmatlas.net/organization/169cd6c0-3ab1-45f9-9831-ee7ff1339df8> ;
    dct:title "Shipborne Multifrequency Echo Sounder and Multibeam Data for Fisheries and Seafloor Characterization" ;
    owl:versionInfo "1.0" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Data Manager" ;
            vcard:hasEmail <mailto:roddy.rabarijaona@gmail.com> ] ;
    dcat:distribution <https://metadata.macmatlas.net/dataset/98d58c65-09a1-48ec-b669-443217b5bc17/resource/038d0d4b-afd9-4d82-8f42-83dfc84c055f> ;
    dcat:keyword "Acoustic backscatter",
        "Active acoustics",
        "Fish biomass estimation",
        "Multibeam bathymetry",
        "Seafloor habitat mapping" .

<https://metadata.macmatlas.net/dataset/98d58c65-09a1-48ec-b669-443217b5bc17/resource/038d0d4b-afd9-4d82-8f42-83dfc84c055f> a dcat:Distribution ;
    dct:format "other" ;
    dct:issued "2026-05-31T20:24:27.703109"^^xsd:dateTime ;
    dct:modified "2026-05-31T20:24:27.693742"^^xsd:dateTime ;
    dct:title "Acoustic_fritdjof_nansen" .

<https://metadata.macmatlas.net/organization/169cd6c0-3ab1-45f9-9831-ee7ff1339df8> a foaf:Organization ;
    foaf:name "Coastal and Marine Environment" .