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    "@type": "Dataset",
    "@id": "http://portal.medin.org.uk/portal/json-ld/Marine_Scotland_FishDAC_1690.jsonld",
    "identifier": "Marine_Scotland_FishDAC_1690",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=Marine_Scotland_FishDAC_1690",
    "name": "FishDAC - Mackerel Acoustic Survey - 2014",
    "description": "The objectives of the survey were: \u2022 To obtain in-situ target strength data and biological samples from dispersed individuals and schools of mackerel to verify target strength models. \u2022 To obtain echosounder and sonar data from mackerel schools to determine numerical density and abundance. \u2022To investigate the use of a broadband system as a means to determine mackerel size \u2022 To study distribution of cetaceans and their relationship to mackerel shoals \u2022 To obtain hydrographic data from vertical CTD casts. Specific objectives: 1.Calibration of Broadband system. 2. Obtain acoustic data from mackerel using the broadband system. 3. Obtain echosounder recordings of mackerel schools and map their distribution. 4. Obtain biological samples of mackerel from schools by trawling. 5.Calibrate Sv and TS gains on the Simrad EK60. 6.Deploy a camera system with additional sensors into the mackerel schools to observe behaviour. 7.Observe marine mammal distribution and activity during daylight hours. 8.Obtain towed hydrophone recordings of mammal vocalisation during survey transects.",
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    "temporalCoverage": "2014-10-11/2014-10-23",
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            "@type": "DefinedTerm",
            "identifier": "http://vocab.ndg.nerc.ac.uk/term/N010/4/NDGO0001",
            "name": "Marine Environmental Data and Information Network"
        },
        {
            "@type": "DefinedTerm",
            "name": "Fisheries and aquaculture"
        },
        {
            "@type": "DefinedTerm",
            "name": "Water column temperature and salinity"
        },
        {
            "@type": "DefinedTerm",
            "name": "Acoustic backscatter in the water column"
        },
        {
            "@type": "DefinedTerm",
            "name": "Fish abundance in water bodies"
        },
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        },
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            "name": "Habitats and biotopes"
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            "box": "58.50518 -3.911133 61.72112 2.768555"
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    "maintainer": [
        {
            "@type": "Organization",
            "name": "Scottish Government (Marine Scotland)",
            "description": "custodian",
            "email": "marinescotland@gov.scot",
            "telephone": "+44 (0)300 244 4000",
            "address": {
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                "streetAddress": "Mailpoint 11, Area 1B South, Victoria Quay",
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        "url": "https://portal.medin.org.uk/portal/",
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        "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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