이 데이터셋의 설명이 없습니다

이 데이터셋의 설명이 없습니다

이 데이터셋의 설명이 없습니다

이 데이터셋의 설명이 없습니다

이 데이터셋의 설명이 없습니다

Cruise NF-12-04-SERA (Sanctuary Regional Development and Assessment) (Reson7125). 1)Ship based mapping and characterization of benthic habitats in the waters around Gray’s Reef National Marine Sanctuary. Collected data will need to include backscatter.2)Continuation of invertebrate recruitment investigation in Gray’s Reef. This project will include diving to assess the colonization and succession of invertebrates to a natural substrate. 3)Continue investigations to quantify variation in space and time of the abundance ofschooling prey and mid-water predators at mid-shelf reefs: this involves conducting survey lines using the EK-60 survey system. 4)Continue collecting data on the abundance,diversity and distribution of both fishes and invertebrates both in side and outside the proposed Research Area in Gray’s Reef.This will require divers to conduct visual fis hcensuses along transects and take pictures of quadrats to assess invertebrate fauna. 5)Gray’s Reef would like to explore the possibility of conducting night dives aboard its own diving vessels provided that this does not present theNancy Fostercrew with unduestaffing/overtime issues and would be worked out in advance of conducting operations.

이 데이터셋의 설명이 없습니다

2018 Summer California Current Ecosystem CPS Survey (RL1807). In the California Current Ecosystem (CCE), multiple coastal pelagic fish species (CPS), including Pacific sardine (Sardinops sagax), Northern anchovy (Engraulis mordax), jack mackerel (Trachurus symmetricus), Pacific mackerel (Scomber japonicus), and Pacific herring (Clupea pallasii), comprise the bulk of the forage fish assemblage. These populations of these species can change by an order of magnitude within a couple years, represent important prey for marine mammals, birds, and larger migratory fishes and are targets of commercial fisheries. Between 26 June and 23 September 2018, an Acoustic-trawl method (ATM) survey was performed to sample the west coast of North America, from the northern tip of Vancouver Island, British Columbia to San Diego, CA to estimate the biomass distributions and abundances of CPS, krill, and their abiotic environments in the CCE. The ATM survey was part of a larger joint survey with the Southwest Fisheries Science Center Marine Mammal and Turtle Division that used line-transect sampling to estimate the abundances, distributions, and demographics of marine mammals and seabirds within the sampling domain. Acoustic sampling and visual observations of marine mammals and seabirds were conducted along 127 east-west acoustic transects totaling 6104 nmi. To estimate the proportions of coastal pelagic species and their lengths, catches were analyzed from 169 trawls. On the NOAA Ship Reuben Lasker, multi-frequency (18, 38, 70, 120, 200, and 333 kHz) EK60 General Purpose Transceivers (GPT, Simrad) and EK80 Wideband Transceivers (WBT, Simrad) were configured with split-beam transducers (Models ES18-11, ES38B, ES70-7C, ES120-7C, ES200-7C, and ES333-7C; Simrad) mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (transducers ~5-m depth) during calibration, and extended to the intermediate position (transducers ~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted; or during times of heavy weather, when the keel was extended (transducers ~9-m depth) to provide extra stability and reduce the effect of weather-generated noise. In addition, acoustic data were also collected using an ME70 multibeam echosounder (Simrad), MS70 multibeam sonar (Simrad), and SX90 omni-directional sonar (Simrad). Transducer position and motion were measured at 5 Hz using an inertial motion unit (POS-MV, Trimble/Applanix). Final 2018 Report: https://repository.library.noaa.gov/view/noaa/19759 Final 2018 Biomass Report: https://repository.library.noaa.gov/view/noaa/19853

During summer 2017, the west coasts of the United States and Vancouver Island, Canada, were surveyed using Lasker during the feeding seasons of sardine and anchovy. The survey departed from San Diego, transited to the northern end of Vancouver Island and sampled southward. Compulsory transects were nearly perpendicular to the coast with nominal separations of 20 nmi in most areas and with nominal separations of 10 nmi in areas where CPS were observed acoustically, in trawl catches, or both. The transect positions also covered much of the potential habitat of sardine at the time of the survey. The survey spanned an area from approximately Cape Scott, British Columbia (northern end of Vancouver Island) to Point Conception, with 105 east-west transects totaling 3540 nmi, and 83 Nordic trawls. Multi-frequency (18, 38, 70, 120, 200, and 333 kHz) General Purpose Transceivers (Simrad EK60 GPTs) and Wideband Transceivers (Simrad EK80 WBTs) were configured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, ES200-7C, and ES333-7C, respectively). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (transducers ~5-m depth) during calibration, and extended to the intermediate position (transducers ~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted; or during times of heavy weather, when the keel was extended (transducers ~9-m depth) to provide extra stability and reduce the effect of weather-generated noise.In addition, acoustic data were also collected using an ME70 multibeam echosounder (Simrad) and MS70 multibeam sonar (Simrad). Final Summer 2017 Survey Report: https://repository.library.noaa.gov/view/noaa/17367 Final Summer 2017 Biomass Report: https://repository.library.noaa.gov/view/noaa/19808

Multi-frequency (18, 38, 70, 120, 200, and 333 kHz) General Purpose Transceivers (Simrad EK60 GPTs) and Wideband Transceivers (Simrad EK80 WBTs) were configured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, ES200-7C, and ES333-7C, respectively). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (~ 5-m depth) during calibration, and extended to the intermediate position (~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted to ~ 5-m depth; or during times of heavy weather, when the keel was extended to ~9-m depth to provide extra stability and reduce the effect of weather-generated noise. In addition, acoustic data were also collected using an ME70 multibeam echosounder (Simrad), MS70 multibeam sonar (Simrad), and SX90 Omnidirectional echosounder (Simrad). Final Summer 2016 Survey Report: https://repository.library.noaa.gov/view/noaa/18376