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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/Marine_Scotland_FishDAC_1646.jsonld",
    "identifier": "Marine_Scotland_FishDAC_1646",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=Marine_Scotland_FishDAC_1646",
    "name": "FishDAC - Mackerel Acoustic Survey - 2012",
    "description": "The objectives of the survey were:\r\n\u2022\tTo obtain in-situ target strength data and biological samples from dispersed individuals and schools of mackerel to verify target strength models.\r\n\r\n\u2022\tTo obtain echosounder and sonar data from mackerel schools to determine numerical density and abundance.\r\n\u2022\tTo obtain hydrographic data from vertical CTD casts\r\n\r\nSpecific Objectives\r\n\r\n1.\tObtain individual in-situ TS measurements of mackerel.\r\n\r\n2.\tObtain sonar recordings of mackerel schools.\r\n\r\n3.\tObtain echosounder recordings of mackerel schools.\r\n\r\n4.\tObtain biological samples of mackerel from schools (trawl).\r\n\r\n5.\tObtain biological samples of mackerel from dispersed single targets (rod and line).\r\n\r\n6.\tCalibrate Sv and TS gains on the Simrad EK60.\r\n\r\n7.\tObtain and freeze a length stratified sample of mackerel for analysis on the laboratory.\r\n\r\n8.\tObtain biological samples of spurdog.\r\n\r\n9.\tObtain echosounder recordings of spurdog.\r\n\r\n10.\tObtain hydrographic data from vertical CTD casts",
    "includedInDataCatalog": {
        "@id": "http://portal.medin.org.uk/portal/json-ld/catalog.jsonld"
    },
    "temporalCoverage": "2012-10-16/2012-10-22",
    "keywords": [
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            "@type": "DefinedTerm",
            "identifier": "http://vocab.ndg.nerc.ac.uk/term/N010/4/NDGO0001",
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        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.ndg.nerc.ac.uk/term/P031//D025",
            "name": "Water column temperature and salinity"
        },
        {
            "@type": "DefinedTerm",
            "identifier": "http://vocab.ndg.nerc.ac.uk/term/P021//ASAM",
            "name": "Acoustic backscatter in the water column"
        },
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            "identifier": "http://vocab.ndg.nerc.ac.uk/term/P021//FATX",
            "name": "Fish abundance in water bodies"
        }
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    "spatialCoverage": {
        "@type": "Place",
        "geo": {
            "@type": "GeoShape",
            "box": "58.2286 -4.21875 61.15384 0.4614258"
        },
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    "maintainer": [
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            "name": "Marine Scotland",
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            "telephone": "+44 (0)1224 876 544",
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        "url": "https://portal.medin.org.uk/portal/",
        "name": "Marine Environmental Data and Information Network (MEDIN)",
        "description": "The MEDIN portal contains information about 19493 marine datasets from over 600 UK organisations. Metadata are an enduring resource and contact details are publicly available for a long time. \r\n\t\tPlease contact us (enquiries@medin.org.uk) if you find your contact details on the MEDIN portal and do not consent to this. \r\n\t\tYou can now use our GitHub repository to report issues or access related documents. Metadata records are updated daily and were last updated 2026-04-19. Record deletion takes place weekly and the latest occurred 2026-04-12."
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