gov.noaa.nmfs.inport:27731 eng UTF8 dataset Oracle Database Northeast Fisheries Science Center (508)495-2000 166 Water Street Woods Hole MA 02543-1026 USA https://www.nefsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 8:00 a.m. to 4:30 p.m. Monday - Friday resourceProvider McElroy, W. David 508-495-2249 508-495-2258 166 Water Street Woods Hole MA 02543-1026 USA dave.mcelroy@noaa.gov pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Gulf of Maine Cooperative Bottom Longline Survey Database Cooperative Bottom Longline Survey Database publication NOAA/NMFS/EDM 27731 https://www.fisheries.noaa.gov/inport/item/27731 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information tableDigital This database is for a bottom longline (fixed gear) survey executed in the western and central Gulf of Maine targeting complex rocky habitats. The survey is operated from collaborating commercial fishing vessels, and deploys 1 nm sets of traditional 'tub trawl' bottom longline groundfish gear (1000 hooks). Longline gear is deployed at randomly selected stations within selected NEFSC bottom trawl survey (BTS) strata in the western and central Gulf of Maine during the spring and autumn, overlapping temporally with the NEFSC seasonal BTS in that region. Specific ‘hard’ and ‘smooth’ bottom sub-strata were chosen within the BTS strata based on predictive habitat maps that have identified complex habitat at a spatial resolution of @1.3km2 (Manderson et al. 2011). The total number of longline stations are allocated by the overall area of each stratum, as done in the NEFSC BTS, and stations randomly distributed in the ‘hard’ and ‘smooth’ sub-stratum within each stratum. Each set is made for 2 hours, with gear deployed 1 hour prior to the estimated time for slack tide at that location. The ambient current is monitored with an instrument with an accelerometer (also equipped with a compass and thermometer), which is attached to the mainline on each end of the longline (by the last hook). Temperature-depth probes are deployed on the anchor at each end of the longline. Catch weights, fish lengths, and other biological data are collected for all species following standard survey protocols. Biological sampling (for age and reproductive data) is collected for a subset of species and sizes relative to the BTS’s request protocols to fill in data on uncommon species, and less common sizes (i.e. larger individuals) of key groundfish. The objective of this survey is to provide important information for several species that are not well sampled in BTS or those that are not caught in substantive numbers (targeted) by commercial or recreational fisheries to inform management, Endangered Species Act (ESA) listing decisions, and conservation plan measures. These include cusk, which is a candidate species under the ESA and a data poor stock, as well as Atlantic Wolffish, Atlantic Halibut, and Thorny Skate, which are all NOAA Species of Concern. This survey is designed to increase sampling opportunities for all of these species. Catch and biological data from this survey provides useful supplemental data and indices for other groundfish including white hake, barndoor skate, red hake, spiny dogfish, haddock, Atlantic cod, and smooth skate. A bottom longline (fixed gear) survey executed in the western and central Gulf of Maine focused on areas of complex rocky habitat that are not readily sampled by mobile trawl gear. This survey addresses concerns about the limited data of specific species in hard bottom habitats for important groundfish stocks collected on other surveys. It particularly enhances data collection for several data poor and depleted stocks that are specifically associated with rocky habitat. completed Gervelis, Brian J 401-782-3337 401-782-3292 28 Tarzwell Drive Narragansett RI 02882 brian.gervelis@noaa.gov pointOfContact McElroy, W. David 508-495-2249 508-495-2258 166 Water Street Woods Hole MA 02543-1026 USA dave.mcelroy@noaa.gov custodian continual bottom longline cooperative research data poor species fishery independent fixed gear groundfish survey theme biannual fall spring temporal Cashes Ledge Fippennies Ledge Gulf of Maine Jeffreys Ledge Platts Bank Stellwagen Bank hard bottom ledges rocky habitat place 0126 0127 0128 0129 0136 0137 bottom trawl survey strata offshore strata stratum DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Northeast Cooperative Research Program (NCRP) project InPort otherRestrictions Cite As: Northeast Fisheries Science Center, [Date of Access]: Gulf of Maine Cooperative Bottom Longline Survey Database [Data Date Range], https://www.fisheries.noaa.gov/inport/item/27731. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: NEFSC Data Access Constraint: If data is stored on an internal NEFSC network, the requester may not have direct access to query the data unless they are also authorized for network access. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 27731 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/nefsc/dmp/pdf/27731.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US oceans Vessel locations, fishing operational data, and aggregate fish weight data are recorded using the FLDRS v3.1 software. Aggregate fish weights are initially recorded on data sheets, and subsequently summed in excel and entered into FLDRS software. Fish length data are captured from wireless measuring boards on handheld Allegro field PC's with windows mobile using CEWedge software. The length data are recorded with DataTrawler v1.0 software written in visual basic, which outputs the data in a Microsoft access database file (.accdb). Biological data are recorded by hand and entered on shore into excel before loading into the Oracle database. Star Oddi temperature-depth sensors are downloaded using the Sea Star software v7.02 and exported in a .dat file. -70.5602 -67.60223 42.09656 43.27977 Central and western Gulf of Maine in U.S. territorial waters. Bottom trawl survey offshore strata: 0126, 0127, 0128, 0129, 0136, 0137 Biannual survey (spring & fall) conducted in 2014-2015. Survey is conducted in April/May and Oct/November in conjuction with the BTS leg 4. In spring 2014 a vessel breakdown resulted in survey completetion in the first few days of June. 2014-04-01 false eng false Data Table LL_BIOSAMPLING 2016-12-13 publication LL_CATCH 2016-12-15 publication LL_LENGTH 2016-12-13 publication LL_STA_EVAL_CODES 2016-12-13 publication LL_STATION 2016-12-13 publication OTOLITH_LENGTH_PREDICTION_DATA 2016-12-13 publication LL_DAMAGED_FISH_OTOLITHS 2018-01-26 publication Northeast Fisheries Science Center (508)495-2000 166 Water Street Woods Hole MA 02543-1026 USA https://www.fisheries.noaa.gov/about/northeast-fisheries-science-center WWW:LINK-1.0-http--link Northeast Fisheries Science Center Website NEFSC Home Page information 8:00 a.m. to 4:30 p.m. Monday - Friday distributor https://console.cloud.google.com/storage/browser/nmfs_odp_nefsc/PARR/FMRD/NCRP/27731 WWW:LINK-1.0-http--link https://console.cloud.google.com/storage/browser/nmfs_odp_nefsc/PARR/FMRD/NCRP/27731 7 data files: 27731_ll_biosampling.csv 27731_ll_catch.csv 27731_ll_damaged_fish_otoliths.csv 27731_ll_length.csv 27731_ll_sta_eval_codes.csv 27731_ll_station.csv 27731_ll_otolith_length_prediction_data.csv Data extracted on 1/25/2018 download dataset Accuracy Vessel locations are taken from the vessel's GPS and recorded at ±0.0001°. Fish weights are taken using Merel motion compensated scales, and recorded ±0.1 kg for aggregate catch weights and ±0.01 kg for individual fish weights. Aggregate fish weights are for undifferentiated sexes for all species, except spiny dogfish weights are sex specific. Fish lengths are collected using Latitude 42 boards with Haglof wireless sensors, and they are recorded at ±1 cm precision. Temperature and depth data at the anchors are recorded with Star Oddi sensors with a precision of ±0.01m and ±0.01°C. Current flow is recroded at a ±0.01 m/s, direction ±0.01° true north, and temperature ±0.001°C. Fish are identified to the species level. Sex and maturity are characterized using the standard survey macroscopic schemes. Fish ages are reported to the nearest year with the same protocols and precison as in the bottom trawl survey database. Completeness Report Data collection and auditing are ongoing. The status of auditing should be checked before the use of any data. The survey data began to be collected in the field in April 2014. A dedicated database began to be designed for storing the data starting in fall 2014.