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{
    "pk": 62911,
    "title": "Assessing Fish Distribution in Richardson Bay, California: A Preliminary Dual-Frequency Identification Sonar and Environmental Data Approach",
    "subtitle": null,
    "abstract": "Estuaries provide critical habitat for many economically and ecologically valuable species that are adapted to a wide range of conditions and environmental variability, but the often turbid water presents challenges to monitoring efforts. This study explored fish habitat use in Richardson Bay, California (a sub-estuary of San Francisco Bay) at two points in time: one following a dry winter (2016) and the other following a historically wet winter (2017). Dual-frequency Identification Sonar (DIDSON) was used to record finfish and ray (>10 cm) abundance (MaxN) and size distribution, putative ray foraging pit size and abundance (MaxN), and eelgrass (Zostera marina) presence. We measured temperature, salinity, and dissolved oxygen (DO) at each site, and water samples at a subset of sites for nutrient analysis (urea, ammonium, nitrate, silicate, phosphate). Relationships between these data were explored using an information-theoretic modeling approach. Finfish abundance was best predicted by nutrient concentration in 2016 (–) and eelgrass presence in 2017 (–), whereas fish length was best predicted by salinity in 2016 (–) and eelgrass presence in 2017 (+). Foraging-pit abundance was strongly related to nutrient concentrations (+) in both years. This work presents a first attempt to establish relationships between fish distributions and environmental variables in Richardson Bay, and highlights the value of imaging sonar for studying fish communities in turbid estuaries.",
    "language": "en",
    "license": {
        "name": "Creative Commons Attribution 4.0",
        "short_name": "CC BY 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by/4.0"
    },
    "keywords": [
        {
            "word": "imaging sonar, fish community, salinity, nutrients, eelgrass, bioturbation, ray pits"
        }
    ],
    "section": "Research Article",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/7qf7j90m",
    "frozenauthors": [
        {
            "first_name": "Carmen",
            "middle_name": "J.",
            "last_name": "Ritter",
            "name_suffix": "",
            "institution": "Smithsonian Environmental Research Center\nEdgewater, MD 21037 USA",
            "department": ""
        },
        {
            "first_name": "Jack",
            "middle_name": "C.",
            "last_name": "Olson",
            "name_suffix": "",
            "institution": "Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission\nMarathon, FL 33050 USA",
            "department": ""
        },
        {
            "first_name": "William",
            "middle_name": "",
            "last_name": "Cochlan",
            "name_suffix": "",
            "institution": "Northwest Indian College, Salish Sea Research Center\nBellingham, WA 98226 USA",
            "department": ""
        },
        {
            "first_name": "Kathryn",
            "middle_name": "",
            "last_name": "Boyer",
            "name_suffix": "",
            "institution": "San Francisco State University, Estuary and Ocean Science Center, Tiburon, CA 94920 USA",
            "department": ""
        },
        {
            "first_name": "Michael",
            "middle_name": "",
            "last_name": "Goodison",
            "name_suffix": "",
            "institution": "Smithsonian Environmental Research Center\nEdgewater, MD 21037 USA",
            "department": ""
        },
        {
            "first_name": "Gregory",
            "middle_name": "",
            "last_name": "Ruiz",
            "name_suffix": "",
            "institution": "Smithsonian Environmental Research Center\nEdgewater, MD 21037 USA",
            "department": ""
        },
        {
            "first_name": "Matthew",
            "middle_name": "",
            "last_name": "Ogburn",
            "name_suffix": "",
            "institution": "Smithsonian Environmental Research Center\nEdgewater, MD 21037 USA",
            "department": ""
        }
    ],
    "date_submitted": "2025-03-18T07:27:21+01:00",
    "date_accepted": "2025-03-18T07:27:21+01:00",
    "date_published": "2025-03-31T09:00:00+02:00",
    "render_galley": null,
    "galleys": [
        {
            "label": "",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/jmie_sfews/article/62911/galley/48597/download/"
        }
    ]
}