gov.noaa.nmfs.inport:31133 eng UTF8 dataset Mixed Southwest Fisheries Science Center (858)546-7000 8901 La Jolla Shores Dr. La Jolla CA 92037 USA https://swfsc.noaa.gov/ WWW:LINK-1.0-http--link Website Website for this organization information 8:00-16:30 resourceProvider Kinzey, Doug 858-546-5601 8901 La Jolla Shores Dr La Jolla CA 92037 USA doug.kinzey@noaa.gov pointOfContact 2026-03-04T19:17:18 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Integrated Krill Model WG-SAM-14/20 Integrated Krill Model WG-SAM-14/20 1981 creation 2014 publication NOAA/NMFS/EDM 31133 https://www.fisheries.noaa.gov/inport/item/31133 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://www.fisheries.noaa.gov/about/antarctic-ecosystem-research-division-southwest-fisheries-science-center WWW:LINK-1.0-http--link US AMLR Stock Assessments Stock assessments to estimate the status and productivity of biological populations are a central tool in the management of the harvesting of living resources. These methods are used to determine sustainable catch levels that can be demonstrated to meet long-term management criteria. download This analyses conducted are described in the CCAMLR Working Group paper WG-SAM-14/20. This paper is made available as part of the dataset and fully describes the methods, data and results. The integrated modeling framework for Antarctic krill (Euphausia superba) has been extended to include estimates of krill growth consistent with survey data and to use multi-nation survey data collected from 1981 to 2014 near the Antarctic Peninsula. Four models of the population dynamics of Antarctic krill in Subarea 48.1 based on different aggregations of the data are described to illustrate the capabilities of the framework. The eventual goal of this work is in support of CCAMLR to establish that all allowable fisheries removals for each fished stock are sustainable. AMLR scientists participate in the development of new assessment frameworks that can incorporate additional ecosystem and food web considerations and data into the formal models used to establish catch limits. US Antarctic Marine Living Resources Program, NOAA completed Kinzey, Doug 858-546-5601 8901 La Jolla Shores Dr La Jolla CA 92037 USA doug.kinzey@noaa.gov pointOfContact Woodman, Sam 858-546-7138 8901 La Jolla Shores Dr La Jolla CA 92037 USA sam.woodman@noaa.gov custodian ADMB AMLR CCAMLR IKMT MOCNESS RMT8 acoustics bathymetry benthic bioacoustic biomass ecosystem hydroacoustic krill marine population surveys trawl weather theme Admiralty Bay Antarctic Antarctica Bransfield Strait Cape Shirreff Chile Clarence Island Copacabana Deception Island Drake Passage Elephant Island King George Island Livingston Island Peninsula San Telmo Islands Seal Island South Shetlands place DOC/NOAA/NMFS/SWFSC > Southwest 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 AMLR Krill Models project InPort otherRestrictions Cite As: Southwest Fisheries Science Center, [Date of Access]: Integrated Krill Model WG-SAM-14/20 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/31133. 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: None otherRestrictions Use Constraints: None otherRestrictions Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Marine Fisheries Service, US AMLR or its partners. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 31133 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/swfsc/dmp/pdf/31133.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 -64 -43 -65 -58 FAO Area 48.1, CCAMLR Area 48.1, Antarctic Peninsula, South Shetland Islands, South Orkney Islands 1981 2014 Southwest Fisheries Science Center (858)546-7000 8901 La Jolla Shores Dr. La Jolla CA 92037 USA https://swfsc.noaa.gov/ WWW:LINK-1.0-http--link Southwest Fisheries Science Center Website Website listed for Southwest Fisheries Science Center information 8:00-16:30 distributor https://www.fisheries.noaa.gov/about/antarctic-ecosystem-research-division-southwest-fisheries-science-center WWW:LINK-1.0-http--link US AMLR Stock Assessments Stock assessments to estimate the status and productivity of biological populations are a central tool in the management of the harvesting of living resources. These methods are used to determine sustainable catch levels that can be demonstrated to meet long-term management criteria. download dataset Accuracy Echosounders are calibrated to industry standards. Raw acoustic data are collected from calibrated echosounders and archived on the vessel and later on shore-based servers. Samples from nets are processed on board the vessel, and descriptive information is entered into data logs and/or databases. All datasets are ultimately returned to the SWFSC for QA/QC, archiving and review. otherRestrictions otherRestrictions Access Constraints: None | Use Constraints: None Simrad EM3000 Multibeam Echosounder The EM 3000 multibeam echo sounder is a very high resolution seabed mapping and inspection system with respect to high accuracy and resolution. The minimum operating depth is from less than 1 m below its transducers, and in typical sea water conditions the system operates to more than 150 m depth (less in warm water and more in fresh water). Small dimensions and low weight makes the system portable and easy to install. This allows use on survey launches and subsea vehicles to 1500 m water depth. The EM 3000 system has a very high ping rate of up to 40 Hz, a large number of measurements per ping (typically about 120), 1.5 degrees beamwidth, and electronic pitch stabilization of the transmit beam. 100% coverage of the bottom is achievable at vessel speeds of about 10 knots in shallow waters with acrosstrack coverage of up to four times depth beneath the transducers with a basic system. At longer range the achievable coverage may be up to 200 m, and 100% coverage is achievable with vessel speeds up to 20 knots. The EM 3000 may be configured to use two sets of transducers (Sonar Heads). This increases the shallow water coverage to up to ten times the depth, and the number of measurements per ping to typically 220. With an angular coverage sector of nominally 200 degrees the dual system also allows surveying to the water surface along shorelines, river banks and man-made structures. The system sonar frequency is 300 kHz allowing small dimensions, good range capability and high tolerance to turbid waters. Integrated seabed acoustical imaging capability (like a sidescan sonar) is included as standard. A nearfield mode is available for increased resolution at very short ranges (less than 4 m). A combination of phase and amplitude bottom detection algorithm is used, resulting in a measurement accuracy of 5 cm RMS being achievable practically independent of beam pointing angle. The EM 3000 multibeam system was in production from 1996 to 2004 and was replaced with the EM 3002. MOCNESS Plankton Nets The Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) uses a stepping motor to sequentially control the opening and closing of individual nets to obtain discrete depth tow data. The MOCNESS uses underwater and shipboard electronics for controlling the device. The electronics system continuously monitors the functioning of the nets, frame angle, horizontal velocity, vertical velocity, volume filtered, and selected environmental parameters such as salinity and temperature. Isaac-Kidd Midwater Trawl (IKMT) Trawl Nets The Isaacs-Kidd Midwater Trawl (IKMT) is used to collect deep water biological specimens larger than those taken by standard plankton nets. The mouth of the net is attached to a wide, V-shaped, rigid diving vane that keeps the mouth of the net open and maintains the net at depth for extended periods Charter vessels-small boats various vessels ranging in size (20-40 ft length) chartered for cetacean surveys when a NOAA small boat is not available. Simrad EM3000 Multibeam Echosounder The EM 3000 multibeam echo sounder is a very high resolution seabed mapping and inspection system with respect to high accuracy and resolution. The minimum operating depth is from less than 1 m below its transducers, and in typical sea water conditions the system operates to more than 150 m depth (less in warm water and more in fresh water). Small dimensions and low weight makes the system portable and easy to install. This allows use on survey launches and subsea vehicles to 1500 m water depth. The EM 3000 system has a very high ping rate of up to 40 Hz, a large number of measurements per ping (typically about 120), 1.5 degrees beamwidth, and electronic pitch stabilization of the transmit beam. 100% coverage of the bottom is achievable at vessel speeds of about 10 knots in shallow waters with acrosstrack coverage of up to four times depth beneath the transducers with a basic system. At longer range the achievable coverage may be up to 200 m, and 100% coverage is achievable with vessel speeds up to 20 knots. The EM 3000 may be configured to use two sets of transducers (Sonar Heads). This increases the shallow water coverage to up to ten times the depth, and the number of measurements per ping to typically 220. With an angular coverage sector of nominally 200 degrees the dual system also allows surveying to the water surface along shorelines, river banks and man-made structures. The system sonar frequency is 300 kHz allowing small dimensions, good range capability and high tolerance to turbid waters. Integrated seabed acoustical imaging capability (like a sidescan sonar) is included as standard. A nearfield mode is available for increased resolution at very short ranges (less than 4 m). A combination of phase and amplitude bottom detection algorithm is used, resulting in a measurement accuracy of 5 cm RMS being achievable practically independent of beam pointing angle. The EM 3000 multibeam system was in production from 1996 to 2004 and was replaced with the EM 3002. MOCNESS Plankton Nets The Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) uses a stepping motor to sequentially control the opening and closing of individual nets to obtain discrete depth tow data. The MOCNESS uses underwater and shipboard electronics for controlling the device. The electronics system continuously monitors the functioning of the nets, frame angle, horizontal velocity, vertical velocity, volume filtered, and selected environmental parameters such as salinity and temperature. Isaac-Kidd Midwater Trawl (IKMT) Trawl Nets The Isaacs-Kidd Midwater Trawl (IKMT) is used to collect deep water biological specimens larger than those taken by standard plankton nets. The mouth of the net is attached to a wide, V-shaped, rigid diving vane that keeps the mouth of the net open and maintains the net at depth for extended periods