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EK60 Water Column Sonar Data Collected During OES0505
Oceanographic Survey of Cross Seamount and Control Sites (OES0505, EK60). The goal of the cruise was to collect physical and biological oceanographic data at three distinct environment in the lee of the Island of Hawaii: a relatively near-shore pelagic environment off Keahole Point, Hawaii, at Finch Seamount (17° 38.070’N, longitude 157° 41.723’W) with a 1052 m deep peak, and at Cross Seamount (18°43.285’ N, longitude 158° 15.710’ W), with an approximately 400 m deep plateau. Data collected consisted of CTD casts, trawl samples, and continuous monitoring of currents and biological acoustic backscatter. CTD cats were conducted at predetermined stations. CTDs were equipped with oxygen sensors and fluorometers and water was sampled at discrete depths during each cast for chloropigments and nutrients measurements. Trawl operations were conducted at predetermined stations using a Cobb trawl at depths of the shallow (nighttime) and deep (day and nighttime) sound scattering layers. Currents were continuously monitored using a RD Instruments Acoustic Doppler Current Profiler (ADCP) operating at 75 kHz frequency. Biological backscatter were recorded using the EK60 echosounder system (38 and 120 kHz) along predetermined transects. During the survey, a High-frequency Acoustic Recording Package (HARP) was deployed for marine mammal observation.
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EK60 Water Column Sonar Data Collected During OES0602
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Oceanographic Survey in the American Samoa Exclusive Economic Zone (EEZ) (OES0602, EK60). Oceanographic data were collected along five predetermined transects in the American Samoa EEZ and consisted of CTD casts, trawl samples, and continuous current and EK60 recordings. CTD cats were conducted at predetermined stations. CTDs were equipped with oxygen sensors and fluorometers. Trawl operations were conducted at predetermined stations along the transects using a Cobb trawl at depths of the shallow and deep sound scattering layers. Currents were continuously monitored using a RD Instruments Acoustic Doppler Current Profiler (ADCP). Biological backscatter were recorded using the EK60 echosounder system (38, and 120 kHz) along the transects.
EK60 Water Column Sonar Data Collected During OES0403
공공데이터포털
Oceanographic Survey in the American Samoa Exclusive Economic Zone (EEZ) (OES0403, EK60). Oceanographic data were collected along predetermined transects in the American Samoa EEZ. CTD cats were conducted at predetermined stations. CTDs were equipped with oxygen sensors and fluorometers, and chlorophyll and nutrients were measured at discrete depths. Biological backscatter were monitored using the EK60 echosounder system (38, and 120 kHz) along the transects. Currents were continuously recorded using an RD Instruments Acoustic Doppler Current Profiler (ADCP).
EK60 Water Column Sonar Data Collected During OES0404
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Coral reef monitoring and mapping at US Line Islands (OES0404, EK60). The goal of the cruise was to conduct ecosystem surveys in tropical waters near the islands of Jarvis, Palmyra, and Kingman. Surveys were conducted using the Rapid Ecological Assessment (REA) method and by toad divers for fish, corals, invertebrates, and algae. Oceanographic assessment of the reef ecosystem was conducted by CTD casts for temperature and salinity and Acoustic Doppler Current Profiles for currents. Surface and subsurface temperature were also collected by towed divers and surface temperature, salinity, and fluorometer readings were continuously recorded by instruments on the Sette. Long-term monitoring was accomplished by deployment and retrieval of a variety of internally recording devices. Acoustic backscatter was monitored using an EK60 system at 38 and 120 kHz frequencies. Terrestrial wildlife visual surveys were conducted at the islands/atoll for sea and shorebirds.
EK60 Water Column Sonar Data Collected During OES0703L1
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Oceanographic Survey of Cross Seamount and Control Sites (OES0703L1, EK60). The goals of the cruise were to collect acoustic backscatter and oceanographic data at Cross Seamount (18°43.285’ N, longitude 158° 15.710’ W), with an approximately 400 m deep plateau, and at control sites in the surrounding environment. Data collected consisted of CTD casts, trawl samples, and continuous monitoring of currents and biological acoustic backscatter. CTD cats were conducted at predetermined stations. CTDs were equipped with oxygen sensors and fluorometers, and water was sampled at discrete depths during each cast for chloropigment determinations. Trawl operations were conducted at predetermined stations using a Cobb trawl at depths of the shallow (nighttime) and deep (day and nighttime) sound scattering layers. Currents were continuously monitored using a RD Instruments Acoustic Doppler Current Profiler (ADCP) operating at 75 kHz frequency. Biological backscatter were recorded using the EK60 echosounder system (38, and 120 kHz) along predetermined transects.
EK60 Water Column Sonar Data Collected During OS1403
공공데이터포털
2014 Spring CalCOFI. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) are a unique partnership of the California Department of Fish and Wildlife, NOAA Fisheries Service and Scripps Institution of Oceanography. The organization was formed in 1949 to study the ecological aspects of the sardine population collapse off California. Today our focus has shifted to the study of the marine environment off the coast of California, the management of its living resources, and monitoring the indicators of El Nino and climate change. CalCOFI conducts quarterly cruises off southern and central California, collecting a suite of hydrographic and biological data on station and underway. Data collected at depths down to 500 meters include: temperature, salinity, oxygen, phosphate, silicate, nitrate and nitrite, chlorophyll, transmissometer, PAR, C14 primary productivity, phytoplankton biodiversity, zooplankton biomass, and zooplankton biodiversity.
EK60 Water Column Sonar Data Collected During OS1209
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Island Wake Hotspots. Subsurface features were sampled with multi-frequency acoustics, CTD profiles, pairovet and bongo nets sampling different components of the ichthyoplankton and zooplankton assemblages. Juvenile fishes and squid were sampled with an Isaacs-Kidd mid-water trawl (IKMT). Repeat passes of a glider upstream of the area at Point Conception provided detailed sections of temperature, salinity, fluorescence, velocity and acoustic backscatter. Surface plankton will be sampled with manta nets, the Continuous Underway Fish Egg Sampler, thermo-salinograph, and remote sensing. The wakes are expected to be relatively small, with complex sub-mesoscale structure, and strong temporal variability. The primary species focus of this study was small pelagic fish, rockfishes, and squids. However, the full ichthyoplankton community was counted according to usual protocols, and all species from the IKMT were identified, counted and preserved. Calibrated acoustic backscatter data were interpreted using catches from bongo nets and IKMT and predicted frequency-dependent scattering. CUFES data were enumerated and samples preserved according to normal protocols.
EK60 Water Column Sonar Data Collected During OS1207
공공데이터포털
Summer 2012 CalCOFI. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) are a unique partnership of the California Department of Fish and Wildlife, NOAA Fisheries Service and Scripps Institution of Oceanography. The organization was formed in 1949 to study the ecological aspects of the sardine population collapse off California. Today our focus has shifted to the study of the marine environment off the coast of California, the management of its living resources, and monitoring the indicators of El Nino and climate change. CalCOFI conducts quarterly cruises off southern and central California, collecting a suite of hydrographic and biological data on station and underway. Data collected at depths down to 500 meters include: temperature, salinity, oxygen, phosphate, silicate, nitrate and nitrite, chlorophyll, transmissometer, PAR, C14 primary productivity, phytoplankton biodiversity, zooplankton biomass, and zooplankton biodiversity.
EK60 Water Column Sonar Data Collected During OS1607
공공데이터포털
2016 Summer CalCOFI. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) are a unique partnership of the California Department of Fish and Wildlife, NOAA Fisheries Service and Scripps Institution of Oceanography. The organization was formed in 1949 to study the ecological aspects of the sardine population collapse off California. Today our focus has shifted to the study of the marine environment off the coast of California, the management of its living resources, and monitoring the indicators of El Nino and climate change. CalCOFI conducts quarterly cruises off southern and central California, collecting a suite of hydrographic and biological data on station and underway. Data collected at depths down to 500 meters include: temperature, salinity, oxygen, phosphate, silicate, nitrate and nitrite, chlorophyll, transmissometer, PAR, C14 primary productivity, phytoplankton biodiversity, zooplankton biomass, and zooplankton biodiversity.
EK60 Water Column Sonar Data Collected During OL1109
공공데이터포털
2011 COAST. A total of 37 strip transects were conducted across both banks between the depths of 90-390m. Abundance and biomass estimates were calculated for all rockfishes (genus Sebastes), lingcod (Ophiodon elongatus), and Pacific hake (Merluccius productus), however, the primary focus of the analysis was on the following recreationally or commercially important ‘target’ species: greenspotted rockfish (S. chlorostictus), sunset rockfish (S. crocotulus), cowcod (S. levis), bocaccio (S. paucispinis), and bank rockfish (S. rufus). In addition, we described the geological characteristics of the seabed along each transect, examined some aspects of groundfish behavior that may affect abundance and biomass estimates (e.g., height of each fish above the seabed, reaction of fishes to the ROV), and a cursory analysis of the time required to conduct and analyze the results from this survey.
EK500 Water Column Sonar Data Collected During DE0615
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NEFSC 2006 Atlantic Herring Acoustic/Midwater Trawl Survey (DE0615, EK500). The NEFSC Atlantic herring acoustic survey is a fisheries independent survey that provides scientific data for Atlantic herring assessments in the U.S. mid-Atlantic and New England regions. The survey is conducted in the fall on pre-spawning and spawning herring primarily in the Georges Bank region, but with other historical sites in the Gulf of Maine surveyed. The survey is a systematic design with parallel transects oriented perpendicular to bathymetric features. Midwater trawl sites are selected on an ad hoc basis to sample acoustic backscatter attributed to Atlantic herring as well as backscatter by other organisms. The primary gear is multifrequency Simrad echosounders, but midwater trawl, CTD, and a host of other scientific sensor data are collected ancillary to the acoustic data.
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