Stanek, Ashley E. (ORCID: 0000-0001-5184-2126) Uher-Koch, Brian D. (ORCID: 0000-0002-1885-0260) von Biela, Vanessa R. (ORCID: 0000-0002-7139-5981) 20250218 tabular digital data Anchorage, Alaska U.S. Geological Survey, Alaska Science Center Suggested Citation: Stanek, A.E., Uher-Koch, B.D., von Biela, V.R., 2025, Fish nutritional quality, biomarkers, communities, and environmental data from the nearshore Beaufort Sea, Alaska, 2021-2023: U.S. Geological Survey data release, https://doi.org/10.5066/P13ELTUB https://doi.org/10.5066/P13ELTUB This data release contains information derived from fishing efforts and sampled fish from the nearshore Beaufort Sea, Alaska, 2021-2023, as part of a study investigating red-throated loon productivity and diet. The datasets include six tables comprising 1) catch per unit effort (CPUE) data, 2) field-measured lengths of fish (mm), 3) the energy density (kJ/g) and whole-body energy (kJ) of 16 species of forage-sized fish (≤200 mm), 4) taxonomic details of captured fish, 5) temperature (°C), raw electrical conductivity (μS/cm), and salinity (psu) as recorded by data loggers, and 6) the specifications of surface trawl fishing sets. These data were collected to determine the composition of nearshore fish communities, measure the nutritional quality of forage-sized fishes, and assess environmental variables in two sampling regions of the nearshore Beaufort Sea, Alaska. 20210722 20230819 observed Complete None planned Central Beaufort Sea, Alaska -147.7989 -145.8481 70.41597 70.14298 USGS Metadata Identifier USGS:66ccc67ed34e98e8a92435f7 ISO 19115 Topic Category Biota Environment Oceans NASA GCMD Earth Science Keyword Thesaurus Animals/Vertebrates Fish Aquatic habitat USGS CSA Biocomplexity Thesaurus Anadromous species Marine fishes Body composition Calorimetry Intertidal environments Water temperature Water conductivity Salinity USGS Thesaurus Coastal ecosystems Marine ecosystems Water temperature None Forage fish Arctic cisco Arctic cod Arctic flounder Arctic grayling Broad whitefish Dolly Varden Fourhorn sculpin Humpback whitefish Least cisco Ninespine stickleback Pacific capelin Pacific herring Pacific sand lance Rainbow smelt Saffron cod Slender eelblenny Threespine stickleback USGS Geographic Names Information System (GNIS) Alaska Beaufort Sea Foggy Island Bay Flaxman Island Lion Bay None Coregonus autumnalis Boreogadus saida Liopsetta glacialis Thymallus arcticus Coregonus nasus Salvelinus malma Myoxocephalus quadricornis Coregonus pidschian Coregonus sardinella Pungitius pungitius Mallotus villosus socialis Clupea pallasii Ammodytes hexapterus Osmerus mordax dentex Eleginus gracilis Lumpenus fabricii Gasterosteus aculeatus ITIS Integrated Taxonomic Information System Unknown online database online ITIS-North America Taxonomic details retrieved April 30, 2024 from the Integrated Taxonomic Information System online database https://www.itis.gov https://doi.org/10.5066/F7KH0KBK In the cross-referenced manuscript and in this data release, we refer to Pacific capelin by the scientific name Mallotus catervarius following Mecklenburg and Steinke 2015. In the cross-referenced manuscript and in this data release, we refer to rainbow smelt by the scientific name Osmerus dentex and by the common name Arctic smelt following Mecklenburg et al. 2011. In the cross-referenced manuscript and in this data release, we refer to Pacific sand lance (Ammodytes hexapterus) by the common name Arctic sand lance following Orr et al. 2015. Fish were identified in the field by skilled observers following Mecklenburg et al. 2002. Provided here is the classification of fish to Order. Further details are provided in the table "fish_taxonomy_beaufortSea_2021-2023.csv" included with this data package. Kingdom Animalia Subkingdom Bilateria Infrakingdom Deuterostomia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Actinopterygii Class Teleostei Superorder Acanthopterygii Order Gasterosteiformes TSN: 166361 Order Perciformes TSN: 167640 Order Pleuronectiformes TSN: 172702 Order Scorpaeniformes TSN: 166702 Superorder Paracanthopterygii Order Gadiformes TSN: 164665 Superorder Protacanthopterygii Order Osmeriformes TSN: 553133 Order Salmoniformes TSN: 161929 Superorder Clupeomorpha Order Clupeiformes TSN: 161694 No access constraints. No use constraints. These data are marked with a Creative Commons Zero v1.0 (CC0-1.0) Universal public domain dedication. It is requested that this USGS data release be cited for any subsequent publications that reference or utilize these data. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey, Alaska Science Center Mailing and Physical

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Anchorage Alaska 99508 USA 907-786-7000 gs-ak_asc_datamanagers@usgs.gov Stanek, A.E Uher-Koch, B.D. Dunton, K.H. von Biela, V.R. 2025 journal article Marine Biology 172:157 online Springer Stanek, A.E., Uher-Koch, B.D., Dunton, K.H., von Biela, V.R., 2025. Energetic value of Arctic forage-sized fish with implications for a nearshore seabird predator. Marine Biology 172:157. https://doi.org/10.1007/s00227-025-04705-5 https://doi.org/10.1007/s00227-025-04705-5 Attribute values were spot checked to identify possible errors. Attribute values fall within expected ranges. Cells containing 'NA' indicate that no data was collected for that value. The dataset is complete, no data were omitted. Positions determined by handheld GPS; accuracy estimated to be within 3 m. FIELD (FISH CAPTURE): Fyke nets and surface trawls were used to determine nearshore fish community composition. Fyke nets were set in water ~1 m deep and up to 50 m from shore; mesh size of wings and lead was 2.54 cm and 1.7 cm in the trap. Surface trawls (3.1 m x 3.1 m mouth, 15 long, 0.2 cm mesh size) were fished in water 2 – 21 m deep. The duration of each net (effort) was recorded at the time of fish collection. For surface trawls, effort reflects the time trawling through the water. For fyke nets effort reflects the time the net spent fishing between emptying each net. Upon net retrieval, lengths of up to 50 individuals of each species were measured, all fish were counted, and most were released live. Fish that could not be identified to species were identified to family or recorded as "unknown". Length was measured in mm from the tip of the snout to the fork of the tail (fork length), or to the end of the tail for species without forked tails (total length). A subset of fish caught were saved for laboratory analyses. Unknown FIELD (FYKE NET DATA LOGGERS): A HOBO Salt Water Conductivity/Salinity Data Logger (U24-002-C, Onset Computer Corporation, Bourne, MA) was attached to each fyke net at approximately 0.5 m depth. Water temperature and electrical conductivity were recorded at 5-minute intervals. Salinity was calculated given the measured water temperature and electrical conductivity using the function gsw_SP_from_C in the gsw package in R (Kelley et al. 2021). We assumed a pressure of 10.6351 dbar to reflect the 0.5 m depth of the recorders. In summary, the PSS-78 algorithm is used when practical salinity is ≥2; practical salinity is recalculated using a modified version of the Hill et al. 1986 formula when <2. Details can be found in gsw package documentation (Kelley et al. 2021). Kelley et al. 2021 Hill et al. 1986 Unknown FIELD (SURFACE TRAWL DATA LOGGERS): A DST CTD (Star-Oddi, Gardabaer, Iceland) logger was attached the trawl net during each fishing event. Water temperature, electrical conductivity, depth, and salinity were recorded at 1 second intervals. Unknown FIELD (RECORD KEEPING): Upon retrieving data loggers and downloading the recorded data, each row was assigned a corresponding value for station and NetID, and was compiled into a single file. Values were excluded when sensor may have been exposed to air, including during net deployment and retrieval, and during storms. If a depth measurement was reported as a positive value (>0) by the Star-Oddi DST CTD, values were changed to 0 to reflect being at the surface of the water. Unknown LABORATORY (FISH PROCESSING): Fish were frozen after collection at -20 °C until processing in the laboratory. In the lab, fish were thawed, lengths measured, and wet weights were obtained. Length was measured from the tip of the snout to the fork of the tail (fork length), or to the end of the tail for species without forked tails (total length). If multiple individuals were available and <~4 g wet weight, they were combined into a single sample. Otoliths and a muscle plug no more than 5% of the fish’s wet weight were removed for archives. The remaining carcass was freeze dried until weight was stable (at least 48 h) and dry weight was recorded. Freeze dried carcasses were homogenized using a coffee grinder and scissors. Unknown LABORATORY (ENERGY DENSITY): Dry weight energy density was measured using bomb calorimetry. A subsample of each fish was pressed into ~0.16 g pellets for analysis in a Parr 6725 semimicro calorimeter (Parr Instrument Company, Moline, IL, USA) following manufacturer recommended protocols. Unknown LITERATURE CITED: Hill, K.D., Dauphinee, T.M., Woods, D.J., 1986. The extension of the Practical Salinity Scale 1978 to low salinities. IEEE Journal of Oceanic Engineering, OE-11, 1, 109 - 112. https://doi.org/10.1109/JOE.1986.1145154 Kelley, D., Richards, C., WG127 SCOR/IAPSO, 2021. gsw: Gibbs Sea Water Functions. v. 1.0-6. https://CRAN.R-project.org/package=gsw Mecklenburg C.W., Steinke D., 2015, Ichthyofaunal baselines in the Pacific Arctic region and RUSALCA study area. Oceanography 28:158-189. https://doi.org/10.5670/oceanog.2015.64 Mecklenburg C.W., Møller P.R., Steinke D., 2011, Biodiversity of arctic marine fishes: taxonomy and zoogeography. Marine Biodiversity 41:109–140. https://doi.org/10.1007/s12526-010-0070-z Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2002. Fishes of Alaska. American Fisheries Society, Bethesda, Maryland. 1116 p. Orr J.W, Wildes S., Kai Y., Raring, N., Nakabo, T., Katugin, O., Guyon, J., 2015, Systematics of North Pacific sand lances of the genus Ammodytes based on molecular and morphological evidence, with the description of a new species from Japan. Fishery Bulletin 113:129–156. https://doi.org/10.7755/FB.113.2.3 Unknown Spatial information in this data set include named locations and geographic coordinates in decimal degrees. Point 0.00001 0.00001 Decimal degrees World Geodetic System of 1984 (WGS84) World Geodetic System of 1984 (WGS84) 6378137 298.257223563 fish_lengths_beaufortSea_2021-2023.csv Table containing lengths of fish caught in the nearshore Beaufort Sea, Alaska, along with sampling date and location information. Presented in a Comma Separated Value (CSV) formatted table. Author defined NetID A unique identifier for each fishing event comprised of gear type, year, and unique sequential number. Author defined The first two letters identify the gear type (FN = fyke net and ST = surface trawl), the following four digits identify the year (YYYY), and the last two digits are assigned sequentially to each fishing set for each gear type in a year. Date Date of fish capture event. Author defined 2021-07-22 2023-08-19 Date (YYYY-MM-DD) Latitude Latitude of the location where the fish was captured. Author defined 70.1430 70.2930 Decimal degrees (WGS84) Longitude Longitude of the location where the fish was captured. Author defined -147.7989 -145.8627 Decimal degrees (WGS84) Region The general location in the Beaufort Sea where the fish was captured. Author defined Foggy Island Bay Foggy Island Bay, Alaska (approximately 70.2420N 147.4975W) Author defined Flaxman Island Lion Bay, Alaska (approximately 70.1667N 146.0000W) Author defined Station The fyke net or surface trawl station name. A cell contains "None" if a station ID was not assigned. Author defined Unique name for fishing station. Gear The type of gear used to capture fish. Author defined SurfaceTrawl Fish were captured using a surface trawl. Author defined FykeNet Fish were captured using a fyke net. Author defined CommonName Common name of the fish species captured. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Unknown The common name (species) of the captured fish is unknown. Author defined Common name of the fish species captured. ScientificName Scientific name (genus or species) of the fish captured. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Unknown The genus or species of the captured fish is unknown. Author defined Scientific name (genus or species) of the fish captured. mmLength The fork or total length of the captured fish in millimeters, measured from the tip of the fish's snout to the fork of the tail, or to the end of the tail for species without forked tails. Lengths were measured on fresh fish in the field. Total length was measured for Saffron cod, Fourhorn sculpin, Arctic flounder, Slender eelblenny, Threespine stickleback, and Ninespine stickleback. The fork length was measured for all other species. Author defined 31 640 millimeters fish_catch_beaufortSea_2021-2023.csv Table containing the species and number of fish caught and catch per unit effort (CPUE, fish per 24 hours) in the nearshore Beaufort Sea, Alaska, along with date and location information. Presented in a Comma Separated Value (CSV) formatted table. Author defined NetID A unique identifier for each fishing event comprised of gear type, year, and unique sequential number. Author defined The first two letters identify the gear type (FN = fyke net and ST = surface trawl), the following four digits identify the year (YYYY), and the last two digits are assigned sequentially to each fishing set for each gear type in a year. Date Date of the fish capture event. Author defined 2021-07-22 2023-08-19 Date (YYYY-MM-DD) Latitude Latitude of the location where the fish was captured. Author defined 70.1430 70.2930 Decimal degrees (WGS84) Longitude Longitude of the location where the fish was captured. Author defined -147.7989 -145.8627 Decimal degrees (WGS84) Region The general location in the Beaufort Sea where the fish was captured. Author defined Foggy Island Bay Foggy Island Bay, Alaska (approximately 70.2420N 147.4975W) Author defined Flaxman Island Lion Bay, Alaska (approximately 70.1667N 146.0000W) Author defined Station The fyke net or surface trawl station name. Cell contains "None" if a station ID was not assigned. Author defined Unique identifier for the fishing station. Gear The type of gear used to capture the fish. Author defined SurfaceTrawl Fish were captured using a surface trawl. Author defined FykeNet Fish were captured using a fyke net. Author defined CommonName Common name of the fish species captured. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Unknown The common name (species) of the captured fish is unknown. Author defined Common name of the fish species captured. ScientificName Scientific name (genus or species) of the fish captured. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Unknown The genus or species of the captured fish is unknown. Author defined Scientific name (genus or species) of the fish captured. Catch The number of fish per species captured for the specified 'NetID'. Author defined 0 1673 count Effort The duration of time (hours) that each net was fishing for the specified 'NetID'. Author defined 0.18 26.27 hours CPUE Number of fish caught per 24 hour period (catch per unit effort) for the specified 'NetID'. CPUE has been calculated based on 24 hours so that values are standardized between sets of different durations. Author defined 0.0 96.50 fish captured per 24 hour period fish_taxonomy_beaufortSea_2021-2023.csv Table providing species names and the taxonomic classification of all fish species included in this data release. Presented in a Comma Separated Value (CSV) formatted table. Author defined Class Taxonomic hierarchical level, Class. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Class. Order Taxonomic hierarchical level, Order. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Order. Family Taxonomic hierarchical level, Family. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Family. Genus Taxonomic hierarchical level, Genus. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Genus. Species Taxonomic hierarchical level, Species. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Species. Subspecies Taxonomic hierarchical level, Subspecies. ITIS Integrated Taxonomic Information System Taxonomic hierarchical level, Subspecies. Common_Name1 The primary common name of the fish species sampled or collected. ITIS Integrated Taxonomic Information System The primary common name of the fish species. Common_Name2 The secondary common name of the fish species sampled or collected. Blank cells indicate that there is not a secondary common name for the species. ITIS Integrated Taxonomic Information System The secondary common name of the fish species. ITIS_TSN Taxonomic serial number as assigned by ITIS. ITIS Integrated Taxonomic Information System ITIS Taxonomic serial number. Modification Modifications made to the common or scientific names that are reported in ITIS. The authors chose to modify the common and scientific names for this data release and the cross-referenced manuscript to follow those in Mecklenburg and Steinke 2015, Mecklenburg et al. 2011, and Orr et al. 2015. Author defined Description of taxonomic modifications. fish_energyDensity_beaufortSea_2021-2023.csv Table containing energy density and total energy of whole fish collected in the nearshore Beaufort Sea, Alaska, along with unique fish identifier, date and location of collection, and length measured in millimeters of each fish. Presented in a Comma Separated Value (CSV) formatted table. Author defined FishID The unique identifier for each sampled fish. The 'FishID' start with a four-letter code reflecting the common name with two letters from the first word and two letters from the second word. The second part of the 'FishID' is a unique three-digit number. Numbers may not be sequential as analyses were not conducted on all fish sampled. Example: FOSC160 refers to Fourhorn (FO) Sculpin (SC) individual 160. Note: The common name for Arctic Smelt at the initiation of this study was Rainbow Smelt, consequently the code RASM is used throughout to refer to Arctic Smelt. For similar reasons, the code PASA is used to refer to Arctic Sand Lance. Author defined The unique identifier for each sampled fish. NetID A unique identifier for each fishing event comprised of gear type, year, and unique sequential number. Author defined The first two letters identify the gear type (FN = fyke net and ST = surface trawl), the following four digits identify the year (YYYY), and the last two digits are assigned sequentially to each fishing set for each gear type in a year. Date Date of the fish capture event. Author defined 2021-07-22 2023-08-19 Date (YYYY-MM-DD) Latitude Latitude of the location where the fish was captured. Author defined 70.1430 70.2930 Decimal degrees (WGS84) Longitude Longitude of the location where the fish was captured. Author defined -147.7989 -145.9571 Decimal degrees (WGS84) Region The general location in the Beaufort Sea where the fish was captured. Author defined Foggy Island Bay Foggy Island Bay, Alaska (approximately 70.2420N 147.4975W) Author defined Flaxman Island Lion Bay, Alaska (approximately 70.1667N 146.0000W) Author defined CommonName Common name of the fish species. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Common name of the fish species sampled. ScientificName Scientific name of the fish species. Additional taxonomy information is provided in the taxonomy table included with this data release. Modifications are described in this metadata record and the associated taxonomy table. Author defined Scientific name of the fish species sampled. number The number of individual fish used to create the sample. Author defined 1 6 fish mmLength The fork or total length in millimeters, measured from the tip of the snout to the fork of the tail, or to the end of the tail for species without forked tails. Lengths were measured on thawed fish that had been previously frozen. If multiple individuals were pooled for the sample (n>1), the mean length is reported. Total length was measured for Saffron cod, Fourhorn sculpin, Arctic flounder, Slender eelblenny, Threespine stickleback, and Ninespine stickleback. The fork length was measured for all other species. Author defined 39 200 millimeters gCarcassWet Weight in grams of the fish in the laboratory after freezing and partial thawing. If multiple individuals were pooled for the sample (n>1), this is the weight of all fish combined. Cells with 'NA' indicate that the weight of the frozen and partially thawed fish was not recorded. Author defined 0.5811 104.8217 grams gCarcassDry Weight of the freeze-dried fish carcass in grams. If multiple individuals were pooled for the sample (n>1), this is weight of all fish combined. Weights were taken after otoliths and a muscle plug (not exceeding 5% of the wet weight) were removed. Author defined 0.1118 23.6206 grams GrossHeat Energy density of the fish sample in calories per gram as reported by the semimicro bomb calorimeter. Cells with an ‘NA’ indicate that the energy density was not measured. Author defined 3862.89 6581.72 calories per gram kJEnergyDensity_dry Dry weight energy density of the fish sample in kilojoules per gram, calculated from GrossHeat using the conversion of 1 calorie = 0.004184 kilojoules. Cells with an ‘NA’ indicate that the energy density was not measured. Author defined 16.16 27.54 kilojoules per gram kJWholeBody Whole-body energy of the individual fish sampled, calculated by multiplying the energy density in kilojoules per gram by the dry weight in grams. If multiple individuals were pooled for the sample (n>1), the mean dry weight per individual fish was used. Cells with an ‘NA’ indicate that the energy density was not measured. Author defined 1.81 536.08 kilojoules kJEnergyDensity_wet Wet weight energy density of the fish sample in kilojoules per gram, calculated by multiplying the dry weight energy density by 1-percent water content for each sample. Cells with an ‘NA’ indicate that the energy density was not measured. Author defined 3.11 9.68 kilojoule per gram fish_dataLoggers_beaufortSea_2021-2023.csv Table with temperature, raw electrical conductivity, salinity, and depth (if applicable) recorded by data loggers at several Beaufort Sea sites in July and August 2021-2023. Location of measurements during surface trawls can be found in the accompanying table, "fish_trawlSets_beaufortSea_2021-2023.csv". Presented in a Comma Separated Value (CSV) formatted table). Author defined NetID A unique identifier for each fishing event comprised of gear type, year, and unique sequential number. Author defined The first two letters identify the gear type (FN = fyke net and ST = surface trawl), the following four digits identify the year (YYYY), and the last two digits are assigned sequentially to each fishing set for each gear type in each year. DateTime Date and time of water measurement (local Alaska daylight time). Author defined 2021-07-21 15:45:00 2023-08-19 13:10:00 YYYY-MM-DD hh:mm:ss Station The fyke net or surface trawl station name. A cell contains "None" if a station ID was not assigned. Author defined Unique name for fishing station. LoggerSN Serial number for the data logger deployed. Author defined Data logger serial number. microScmConductivity Electrical conductivity measurement in microsiemens per centimeter. Note that electrical conductivity measurements are raw and have not been adjusted for temperature. Cells with ‘NA’ indicate that the data logger did not record a value. Author defined 0.0 29933.5 microsiemens per centemeter TempC Water temperature measurement (Celsius) collected by the data logger. Author defined -0.4 15.77 degrees Celsius psuSalinity Salinity, as reported by StarOddi loggers (Star-Oddi, Gardabaer, Iceland), or calculated for Hobo loggers (U24-002-C, Onset Computer Corporation, Bourne, MA) in practical salinity units. Cells with ‘NA’ indicate that a salinity value was not recorded. Author defined 0.0 30.83 practical salinity units (psu) Logger Name of the data logger manufacturer. Author defined Hobo Logger was a HOBO Salt Water Conductivity/Salinity Data Logger (U24-002-C) Author defined StarOddi Logger was a Star-Oddi DST CTD. Author defined mDepth Depth as reported by the Star-Oddi loggers. Cells with ‘NA’ indicate that a Hobo logger was used and this brand of logger does not collect a depth recording. Author defined -3.71 0.00 meters fish_trawlSets_beaufortSea_2021-2023.csv Table with location and duration information for surface trawls conducted in the nearshore Beaufort Sea, Alaska, July and August 2021-2022. Presented in a Comma Separated Value (CSV) formatted table. Author defined NetID A unique identifier for each fishing event comprised of gear type, year, and unique sequential number. Author defined The first two letters identify the gear type (ST = surface trawl), the following four digits identify the year (YYYY), and the last two digits are assigned sequentially to each fishing set for each gear type. Region The general location in the Beaufort Sea where each net was deployed. Author defined Foggy Island Bay Foggy Island Bay, Alaska (approximately 70.2420N 147.4975W) Author defined Flaxman Island Lion Bay, Alaska (approximately 70.1667N 146.0000W) Author defined Station The surface trawl station name. "None" is used if a station ID was not assigned. Author defined Unique identifier for fishing station. LoggerSN Serial number of the data logger deployed during the trawl set. Cells containing "None" indicate that a logger was not deployed. Author defined Data logger serial number. Start Start date and time of the trawl (local Alaska daylight time). Author defined 2021-07-21 17:08:00 2022-08-13 16:29:00 YYYY-MM-DD hh:mm:ss Stop End date and time of the trawl (local Alaska daylight time). Author defined 2021-07-21 17:18:00 2023-08-13 16:44:00 YYYY-MM-DD hh:mm:ss StartLat Latitude of the starting location of the trawl. Author defined 70.1663 70.4160 Decimal degrees (WGS84) StartLong Longitude of the starting location of the trawl. Author defined -147.7922 -145.8481 Decimal degrees (WGS84) StopLat Latitude of the ending location of the trawl. Author defined 70.1676 70.4101 Decimal degrees (WGS84) StopLong Longitude of the ending location of the trawl. Author defined -147.7665 -145.8489 Decimal degrees (WGS84) U.S. Geological Survey USGS ScienceBase Team Mailing and Physical

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Denver Colorado 80225 USA 1-888-275-8747 sciencebase@usgs.gov The U.S. Geological Survey, Alaska Science Center is the authoritative source of these data, distributed by ScienceBase (a USGS Trusted Digital Repository). Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data for other purposes or on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. CSV Tabular data in CSV format; FGDC metadata in XML and HTML formats. https://doi.org/10.5066/P13ELTUB None 20250919 U.S. Geological Survey, Alaska Science Center Mailing and Physical

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Anchorage Alaska 99508 USA 907-786-7000 gs-ak_asc_datamanagers@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata (CSDGM) FGDC-STD-001.1-1999