2711 Data Set Published / External 7131 EOP In Situ Observational Data Project In Work 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. 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 Theme Deep-7 Theme EOP Theme ESD Theme PIFSC Theme SSL Theme bioacoustics Theme biomass estimation Theme bottomfish Theme ensonified fish Theme micronekton Theme nekton Theme snappers Theme sonic scattering layer Theme tuna Temporal .2 seconds Temporal Discrete sampling periods Temporal half seconds Temporal once per seconds Spatial Hawaii Spatial North Central Pacific Spatial Pacific Ocean Spatial South Central Pacific Spatial mesoscale oceanographic features Spatial seamounts Pacific Islands Fisheries Science Center Honolulu HI USA Data Set Annually Profile (digital) Hydro-acoustic data in raw voltage Echo sounder Fishery Research Vessel N/A Data Steward 2006-08-31 Person Domokos, Reka reka.domokos@noaa.gov https://orcid.org/0000-0003-3297-4793 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5368 8:00 a.m. - 4:30 p.m. M-F Distributor 2015-12-16 Organization Pacific Islands Fisheries Science Center PIFSC pifsc.info@noaa.gov https://ror.org/02apffz65 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5360 https://www.pifsc.noaa.gov Pacific Island Fisheries Science Center homepage Online Resource 8:00 a.m. - 4:30 p.m. Metadata Contact 2006-08-31 Person Domokos, Reka reka.domokos@noaa.gov https://orcid.org/0000-0003-3297-4793 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5368 8:00 a.m. - 4:30 p.m. M-F Email Point of Contact 2006-08-31 Person Domokos, Reka reka.domokos@noaa.gov https://orcid.org/0000-0003-3297-4793 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5368 8:00 a.m. - 4:30 p.m. M-F 130 -140 36 -20 Pacific Ocean, South Central Pacific, North Central Pacific, North Western Pacific, Hawaii, American Samoa, Hawaiian Islands seamounts Continuing 2004-03 Unclassified Contact Reka Domokos (reka.domokos@noaa.gov) None None None https://doi.org/doi:10.7289/V53776PJ SE1102 https://doi.org/doi:10.7289/V57S7KQ9 SE0902 https://doi.org/doi:10.7289/V5W093WG SE1501 https://maps.ngdc.noaa.gov/viewers/water_column_sonar/index.html N/A Yes Unknown Yes Yes 1 year NCEI-CO 1 year Data are archived at NCEI-CO Data are collected in the field by PIFSC staff. gov.noaa.nmfs.inport:2711 Brent Miyamoto 2006-08-31T11:17:18 SysAdmin InPortAdmin 2026-03-04T19:17:27 2015-12-22 Pacific Islands Fisheries Science Center PIFSC 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5300 https://www.pifsc.noaa.gov 8:00 a.m. - 4:30 p.m. 1001 Public No No 2015-12-22 1 Year 2016-12-22