gov.noaa.nmfs.inport:2711 eng UTF8 dataset Pacific Islands Fisheries Science Center 808-725-5300 1845 Wasp Blvd. Honolulu HI 96818 USA https://www.pifsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 8:00 a.m. - 4:30 p.m. resourceProvider Domokos, Reka (808)725-5368 1845 Wasp Blvd. Honolulu HI 96818 USA reka.domokos@noaa.gov 8:00 a.m. - 4:30 p.m. M-F Email pointOfContact 2026-03-04T19:17:27 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EOP active acoustics publication NOAA/NMFS/EDM 2711 https://www.fisheries.noaa.gov/inport/item/2711 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information profileDigital These data contain shipboard active acoustics data collected in the Pacific, both pelagic and near shore environments. Data is collected using Simrad EK60 splitbeam multifrequency systems with the transducers pointing vertically down in the water column. The echosounders operate up to four frequencies at 38 kHz, 70 kHz, 120 kHz, and 200 kHz. Active acoustic data obtained during shipboard surveys are used to study the distribution, movement patterns, composition, and biomass of economically important nekton (such as tunas, snappers, etc), as well as their prey species, which comprise the sonic scattering layer, SSL. Once developed, hydro-acoustic techniques can become a primary method for stock assessment. Besides being free of biases associated with fishery dependent stock assessment methods, hydro-acoustic tools have the advantages of yielding large amounts of data on a controlled grid with a relatively low demand for resources. Further, active acoustic surveys provide simultaneous information on both nekton and micronekton, allowing to better our understanding on the effects of micronekton distribution, movement patterns, and biomass on its predators. With the combination of simultaneously collected data on the environment (such as currents, temperature, salinity,sea surface height, chloropigments), the effects of the physical environment on both nekton and micronekton can be investigated. underDevelopment Domokos, Reka (808)725-5368 1845 Wasp Blvd. Honolulu HI 96818 USA reka.domokos@noaa.gov 8:00 a.m. - 4:30 p.m. M-F pointOfContact Domokos, Reka (808)725-5368 1845 Wasp Blvd. Honolulu HI 96818 USA reka.domokos@noaa.gov 8:00 a.m. - 4:30 p.m. M-F custodian annually Deep-7 EOP ESD PIFSC SSL bioacoustics biomass estimation bottomfish ensonified fish micronekton nekton snappers sonic scattering layer tuna theme .2 seconds Discrete sampling periods half seconds once per seconds temporal Hawaii North Central Pacific Pacific Ocean South Central Pacific mesoscale oceanographic features seamounts place DOC/NOAA/NMFS/PIFSC > Pacific Islands 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 EOP In Situ Observational Data project InPort otherRestrictions Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: EOP active acoustics [Data Date Range], https://www.fisheries.noaa.gov/inport/item/2711. 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 unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 2711 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/2711.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 130 -140 -20 36 Pacific Ocean, South Central Pacific, North Central Pacific, North Western Pacific, Hawaii, American Samoa, Hawaiian Islands seamounts 2004-03-01 Ownership: PIFSC Study Area: Western and Central North Pacific Spatial Resolution: approximately 20-80 cm vertical, 1-100m horizontal, along predetermined survey tracks Temporal Resolution: .2 - 1 second Frequency of Collection: 24 hours / day during survey Time of Collection: Discrete data sets, typically 2-3 weeks per year; cruise, usually once per year Types of Data Collected: Hydro-acoustic data in raw voltage Collection Method: SIMRAD split-beam, vertically pointed transducers Recording Media: Hard drives (internal Collection Standards of the Data or Creation Standards of the Data Product: Available Data Collection Documentation: Field Manual Storage Media: External and internal drives, Simrad EK60 raw data format Security and Integrity Plans: Available Backups: Available Update Schedule: Per cruise, usually once per year dataset Data are collected in the field by PIFSC staff. otherRestrictions otherRestrictions Access Constraints: None | Use Constraints: None