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TwitterOpen Government Licence 3.0http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
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The Environment Agency undertakes fisheries monitoring work on rivers, lakes and transitional and coastal waters (TraC).
This dataset contains site and survey information, the numbers and species of fish caught, fish lengths, weights and ages (where available), for all the freshwater fish surveys carried out across England from 1975 onwards.
Notes: - These survey data are stored in an archive more commonly known as the NFPD (National Fish Populations Database). - This dataset contains Freshwater fish surveys only. - Third party data held on the NFPD are excluded from the dataset. - Some historic surveys (particularly in Anglian Central) have incorrect survey lengths and survey widths. These can be identified by a survey length of 1 and a survey width that is equal to the area. The survey areas are correct. This is due to the migration of old historic data from previous databases into the NFPD. - Approved for Access under AfA347.
Please see the Dataset Documentation for further detail.
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TwitterThese data include goals, objectives, and performance measures from management plans and monitoring surveys related to fisheries management in the St. Clair-Detroit River System and the Western Basin of Lake Erie. Researchers extracted these data from existing management plans identified from on-line grey literature searches and discussions with collaborators and regional fisheries management personnel
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In the spring of 2003, California Department of Fish and Game (CDFG) personnel began quarterly sampling of Salton Sea fish at fourteen stations around the sea, as the basis of a long term monitoring program. To allow comparison of current and future monitoring efforts by CDFG to past results, the protocol was adapted from those previously used by researchers at the Salton Sea. Each quarter, if conditions allow, this protocol will produce about 816 net-hours of sampling. To date data collection was started in the spring of 2003, continuing quarterly. Data collection is ongoing as of 2008. Two seasons were missed due to unavailability of launch sites: Fall 2007 and Winter 2007. *Note: This dataset should be viewed with the Quarterly Water Quality Surveys - Salton Sea [ds429] dataset. Methods: The 11 sampling sites comprise three broad habitat types: pelagic (3 sites), near-shore (8 sites), and estuarine (3 sites). The pelagic sites are in the approximate middles of the north basin, south basin and inter-basin areas of the Sea. The near-shore sites are spaced widely apart, four each, near the west and east shores, to capture as much breadth of habitat as possible. The estuarine sites are in the body of the Sea, close enough to the mouths of the New, Alamo, and Whitewater Rivers, to be under the influence of their outflows. Sampling takes place during each of the putative seasons, as follows: spring- April and May; summer- July and August; fall- October and November; winter- January and February. We attempt to compress the total sampling period into as few days as possible, to the extent that the weather, equipment maintenance, and personnel scheduling constraints allow. Nets are typically set at one or two sites in the morning, and hauled in after approximately 24 hours. The exact number of hours set is recorded for each net, to the nearest quarter-hour. Fish are sampled by deploying multi-panel monofilament gill nets with 6 X 30 foot panels of 0.5, 1, 2, 3, and 4 inch mesh. Two nets are set at all sites at the waters surface. The nets are set far enough apart to allow room for maneuvering a boat during setting and retrieval, usually 100-200 meters. The nets at near-shore and estuarine sites are set in 2.5 to 4.5 meters of water, typically 200-300 meters from the shore. Two additional nets are set at the bottom of water column at the three pelagic sites. The conditions fish experience at the bottom in deep water is different enough from the surface water, in dissolved oxygen, light, food availability and temperature, that this can be considered a discrete habitat, and thus we sample it as though it were a separate site. At the time of each set and retrieval, water depth, water temperature, conductivity, salinity, and dissolved oxygen are measured and recorded. When nets are pulled in the following day, all fish are removed and immediately stored on ice. Data are collected from these fish as soon as possible, almost always the same day they are hauled in. All fish are identified to species level and counted. For the four sport fish in the Salton Sea, (tilapia, Gulf croaker, orangemouth corvina and sargo) weights, lengths (fork length), sex, physical condition, and reproductive status are recorded. Fish above five pounds are weighed to the nearest ounce. Fish below five pounds are weighed to the nearest half ounce. Lengths of fish under 50 centimeters are recorded to the nearest millimeter. Lengths of fish over 50 centimeters are recorded to the nearest centimeter. The sex of adult fish is determined by dissection. A sample of at least ten fish of each species is also dissected to determine physical condition and breeding status. Changes to Protocol after Year One: For previous researchers, deep water habitats provided some low level of productivity for the fisheries, and were important habitat components to sample. During the first year of sampling, however, the three deep water sites (north basin, south basin and inter-basin) were completely unproductive, a costly element of our efforts, and the least probable site for fish use, given the severe reduction in population size which was discovered in 2003. We therefore eliminated sampling at the three deep water sites, which reduced our efforts by 288 net-hours, to a quarterly total effort of 528 net-hours. These sites were left in the protocol, since they will likely provide useful information about population trends and habitat use, should the fisheries rebound to levels which allow robust comparisons among these and the other sampling sites. Footnote: There was a marked change in the weather immediately after our first sampling run on October 13, 2004 resulting in a 6º C drop in water temperature. After seeing how far the number of fish sampled on October 13, 2004 was out of the range of results at subsequent sites, we felt this drop in water temperatures justified resampling the two October 13, 2004 sites. The results were added to the total to compute a CPUE. We originally selected the months of October and November to enclose a putative Fall season, following the convention of Costa-Pierce and Riedel''s study at the Salton Sea in 1999-2000. This approach assumes a biologically significant change in water temperatures between sampling seasons. We have become more hesitant about assuming that the seasons at the Salton Sea fall within their assigned calendar months, and are so clearly discrete. As we saw during this Fall 2004 sampling period, water temperature changes within a sampling period may be as great or greater than those between sampling periods.
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TwitterOpen Government Licence 3.0http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
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This dataset has been extracted as part of an exercise to assemble "all" Cefas Temperature Data and publish it in a Data paper. It is one of 17 Cefas data sources assembled.
The Fishing Survey System (FSS) is a purpose–built database used to hold and maintain Cefas fish survey data, primarily from government mandated surveys. This SQL database holds the main research and charter vessel fishing surveys data from 1901 to present. It includes station, catch, length, and biological data. Easy to access user front end for storing and editing most forms of survey vessel data. Individual surveys grouped by their parent cruise series. Three current sections are shellfish, Fisheries Science Partnership and standard fisheries surveys.
Fish stock monitoring survey stations, provide the main source of temperature data. This dataset also stretches the UK Shelf Waters designation, including a single coastal Greenland survey in 1959 and Arctic surveys in 1930 and 1949–1959.
Various quality control checks ensure high quality storage of data and allow users to edit and extract data as required. Allows uploading from Electronic Data Capture System or X-Files.
Temperature data were extracted from the FSS database using:
SELECT fldCruiseName AS Cruise, fldcruiseStationNumber as StationNumber, fldShotEorW AS EorW, fldShotLonMinutes AS LonMin, fldShotLonDegrees AS LonDeg, fldShotLatMinutes AS LatMin, fldShotLatDegrees AS LatDeg, fldDateTimeShot AS DateTime, fldBottomSalinity AS BottomSalinity, fldSurfaceSalinity AS SurfaceSalinity, fldSurfaceTemp AS SurfaceTemp, fldBottomTemp AS BottomTemp, fldShotDepth AS WaterDepth, fldShotLonDecimalDegrees AS ShotLonDecimal, fldShotNorS AS NorS,fldShotLatDecimalDegrees AS ShotLatDecimal FROM FSS.dbo.tblDataStationLogs where fldBottomTemp is not null or fldSurfaceTemp is not null with values entered as ~36 C removed as suspect; nulls removed.
The multiple sources are described in 17 separate metadata entries under the same Title, e.g. Seawater temperature records for the UK Shelf - 15 - RV Cefas Endeavour FerryBox Monitoring System. These data have been described in detail via the following publication. Morris, D. J., Pinnegar, J. K., Maxwell, D. L., Dye, S. R., Fernand, L. J., Flatman, S., Williams, O. J., and Rogers, S. I.: Over 10 million seawater temperature records for the United Kingdom Continental Shelf between 1880 and 2014 from 17 Cefas (United Kingdom government) marine data systems, Earth Syst. Sci. Data, 10, 27–51, https://doi.org/10.5194/essd-10-27-2018, 2018.
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TwitterThe Southeast Fisheries Science Center Mississippi Laboratories conducts standardized fisheries independent resource surveys in the Gulf of Mexico, South Atlantic, and U.S. Caribbean to provide abundance and distribution information to support regional and international stock assessments. A standardized reef fish survey is conducted in the U.S. Caribbean every 2nd or 3rd year with the objecti...
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Total numbers of individual fish identified during the Cefas Young Fish Survey (YFS) which ran from 1981 to 2010. The survey deployed a light 2-meter beam trawl to survey inshore locations for small / young fish around the British Isles, predominantly along the south and east coasts. Total numbers of fish (identified to species or if not to the highest taxonomic level) were recorded at each station, and were measured in the majority of cases. The surveys were primarily undertaken to evaluate the abundance of juvenile sole and plaice, as well as providing further information on the abundance of other species of fish. Alongside the main 'Young Fish Survey Data 1981 to 2010' data table are three further data tables marked as 'YFS_DWC' which give the same data in EventCore format and a readme file which describes historic versions of metadata which this record has replaced.
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This dataset contains the accumulated stream survey data collected to identify climate impacts to fish communities and assess stream restoration as a potential climate-change mitigation action across the Great Plains and High Desert of Wyoming and Montana (2021-2024). We also provide data of incidental observations of amphibians, reptiles, crayfishes, and mussels seen while conducting fisheries work, as well as structured surveys for amphibians and crayfishes. Habitat data for many sites is also provided.
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TwitterThe Southeast Fisheries Science Center Mississippi Laboratories conducts standardized reef fish video surveys in the Gulf of Mexico since 1992. The survey primarily occurs on the outer continental shelf along topographic features (e.g. reefs, banks and ledges) between Brownsville, TX to the Dry Tortugas, FL, and provides fisheries independent indices of reef fish abundance for use in stock ass...
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TwitterData provided in this collection were gathered around Puerto Rico as part of NCCOS-led missions in collaboration with partners at U.S. Fish and Wildlife Service, University of Puerto Rico Department of Marine Sciences, HJR Reefscaping, and University of the Virgin Islands. In 2014 the Belt Transect method was used to conduct fish surveys in Puerto Rico as part of the ongoing National Coral Reef Monitoring Program (NCRMP). The Belt Transect method collects and reports information on fish species composition, density, size, abundance and derived metrics (e.g., species richness, diversity). Surveys were concurrent with and along the same transect as the Line Point-Intercept (LPI) benthic survey. Starting in 2016 fish data were collected using the stationary point count method. This method collects and reports information on fish species composition, density, size structure, abundance and derived metrics (e.g., species richness, diversity).
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The data is reported in Catch Per Unit Angler (CPUA) which is a simple calculation of the number of fish caught divided by the number of anglers targeting the fishery type within a particular 1' block in a given period. CRFS Catch records for all caught species were aggregated into 5-year bins from 2004-2024 as well as the entire period. All catch of these species were summed and attributed to the blocks (1' x 1' area) which were recorded during the survey interview. If multiple blocks were recorded, then the catch data was divided across all blocks indicated. Catch data is further divided into 'kept' and 'released' fish which is used to calculate a CPUA for only kept fish and a CPUA for both kept and released fish. The total number of anglers targeting any species in each block was calculated for each time frame. An angler represents a single person fishing in a block on a single day. The data is limited to blocks that had 3 or more reported fishing trips over the entire time period.
Effort under the 'All' trip type is an aggregation of all anglers surveyed. This includes anglers from specific trip types such as highly migratory, salmon, bottomfish, coastal migratory, inshore, other anadromous, invertebrates and anything.
Raw data from 2004 - 2015 was extracted from the Pacific States Marine Fisheries Commission (PSMFC) legacy RecFIN database. Data from 2016 - 2024 was extracted from the CDFW's CRFS data system. The data is divided into reported catch (includes reported kept, reported released alive, and reported released dead), observed kept catch, effort and location tables.
Attributes:
Block Box: 1' grid where the data was reported.
Catch: The species or the name of the species group whose individual catch records were aggregated.
Trip Type: Trip type category that includes the primary target species for the angler that was aggregated. This layer is an aggregation of all angler effort.
All_04_09: CPUA for both kept and released catch for 2004-2009.
All_10_15: CPUA for both kept and released catch for 2010-2015.
All_16_20: CPUA for both kept and released catch for 2016-2020.
All_21_24: CPUA for both kept and released catch for 2021-2024.
Kept_04_09: CPUA for only kept catch for 2004-2009.
Kept_10_15: CPUA for only kept catch for 2010-2015.
Kept_16_20: CPUA for only kept catch for 2016-2020.
Kept_21_24: CPUA for only kept catch for 2021-2024.
CPUA_All: CPUA for both kept and released catch for the entire 2004-2024 period.
CPUA_Kept: CPUA for only kept catch for the entire 2004-2024 period. This field is used as the source of the symbology for this layer. Gray blocks represent where effort occurred, but no catch was reported.
Samples: The number of individual survey samples that reported fishing in block for the entire period.
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TwitterAccurate and precise stock assessments are predicated on accurate and precise estimates of life history parameters, abundance, and catch across the range of the stock. In its continued efforts to improve the data used in stock assessments, the NOAA Pacific islands Fisheries Science Center (PIFSC) implemented a Bottomfish Fishery-Independent Survey in Hawaii (BFISH) in 2016. The BFISH survey utilizes two gear types, Cooperative Research hook-and-line fishing operations (CRF) and the Modular Optical Underwater Survey System (MOUSS). Survey sampling is conducted annually, typically in the fall, surrounding the Main Hawaiian Islands (MHI), in accordance with a stratified-random sampling design. Under this design, the waters surrounding the MHI are gridded at 500 meter resolution. Each grid is given attributes of depth, slope, and seafloor hardness. Depth categories are Shallow (75-200 meters), Medium (200-300 meters) and Deep (300-400 meters). Slope categories are Low slope (0-10 degrees) and High (10-90 degrees). Seafloor categories are Hardbottom and Softbottom. Annual survey data are processed to produce relative and absolute abundance and biomass estimates for the Stock Assessment for the Main Hawaiian Islands Deep 7 Bottomfish Complex. CRF Activities have been conducted under contract with the Pacific Islands Fisheries Group (PIFG). Fishing methods are standardized among vessels. Each vessel conducts fishing operations with assigned grid cells for 30 minutes per cell. Each vessel deploys two fishing lines. Each line contains four standard size hooks. Half of the hooks are baited with squid, half with fish. Caught individuals are recorded to the lowest possible taxon on standardized paper datasheets. Each individual is measured (fork-length) in centimeters. Deep7 species are retained by PIFSC for biological analysis.
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TwitterAccurate and precise stock assessments are predicated on accurate and precise estimates of life history parameters, abundance, and catch across the range of the stock. In its continued efforts to improve the data used in stock assessments, the NOAA Pacific islands Fisheries Science Center (PIFSC) implemented a Bottomfish Fishery-Independent Survey in Hawaii (BFISH) in 2016. The BFISH survey utilizes two gear types, Cooperative Research hook-and-line fishing operations (CRF) and the Modular Optical Underwater Survey System (MOUSS). Survey sampling is conducted annually, typically in the fall, surrounding the Main Hawaiian Islands (MHI), in accordance with a stratified-random sampling design. Under this design, the waters surrounding the MHI are gridded at 500 meter resolution. Each grid is given attributes of depth, slope, and seafloor hardness. Depth categories are Shallow (75-200 meters), Medium (200-300 meters) and Deep (300-400 meters). Slope categories are Low slope (0-10 degrees) and High (10-90 degrees). Seafloor categories are Hardbottom and Softbottom. Annual survey data are processed to produce relative and absolute abundance and biomass estimates for the Stock Assessment for the Main Hawaiian Islands Deep 7 Bottomfish Complex. MOUSS operations are conducted by researchers at the NOAA PIFSC. Two MOUSS units are deployed within each survey grid. Each MOUSS is left on the seafloor for a minimum of 15 minutes. Once recovered and returned to the lab, MOUSS videos are analysed using the MaxN method to produce species-specific, size-structured abundance estimates for Deep7 species.
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TwitterThe stationary point count (SPC) method is used to conduct reef fish surveys in the Hawaiian and Mariana Archipelagos, American Samoa, and the Pacific Remote Island Areas as part of the NOAA National Coral Reef Monitoring Program (NCRMP). The SPC method catalogs the diversity (species richness), abundance (numeric density) and biomass (fish mass per unit area) of diurnally active reef fish asse...
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the cgfs campaign is part of a historical series of fishing surveys that began in 1988 (cgfs eastern part, conducted on the r/v gwen drez) and was extended to cover the entire english channel regularly from 2018 (on r/v thalassa). oinly data for the eastern channel is presented. for data from the western channel please see "wcgfs".for both surveys, the main objective is to collect basic data for estimating the state of resources through direct assessment of stock abundance and distribution, along with biological sampling of the catches. taking place every year between mid-september and mid-october, it contributes to the european project for the contractualization of basic fishery data collection (dcf). the campaign also allows for sampling and a better understanding of the entire ecosystem, aligning with the implementation of an ecosystem-based approach to fisheries at the community level. the cgfs also provides data for numerous national and international research projects. the collected and validated data are transmitted at the end of each campaign to national databases (sih, harmonie, coriolis) and the european database (datras), enabling their use by different working groups and ensuring public access to this data. finally, the cgfs data contributes to the baseline assessment of the impact of numerous marine aggregates extraction projects (through a multi-year convention signed between the ministry of ecology, sustainable development and spatial planning, ifremer, and brgm) planned or underway in the eastern english channel.
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Marine Institute Herring Acousic Survey: The northwest and west coast herring acoustic survey programme was first implemented in 1994. Prior to this a larval survey programme was carried out between 1981 and 1986. The stock in this area is composed of 2 spawning components (autum and winter), covering a large geographical area. Spawning may extend over a 4 month period from late September through to late March (Molloy et al, 2000). Traditionally fishing activity has targeted spawning and pre-spawning aggrefations, no summer matjie fishery exists in this area, as is the case in the Celtic Sea. A project is currently underway to describe stock structure and discrimination of herring around Ireland. The results of this project may have implications for the design of this survey and for the stock assessment. This is the second survey of this stock carried out by the Celtic Explorer. Standard oceanographic research data collection to ascertain the condition of the ocean. MSFD characteristics. MSP scientific research. ICES CTD reporting. Fisheries ecosystem metocean analysis.
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TwitterTo characterize the fish communities associated with nearshore rocky reef habitat, we collaborated with commercial passenger fishing vessel (CPFV) captains and volunteer anglers to conduct hook-and-line surveys in four pairs of MPA and reference sites. Sampling was conducted with scientific crews of six: four anglers, a sampler who handled, measured, and tagged fish, and a data recorder. Each of the four anglers used a different combination of baited or un-baited lures that represented gear frequently used by recreational anglers to catch the target species. Sites were sampled by fishing for 45 minutes in each of four 500 meter by 500 meter sampling cells, which were randomly selected from a set of cells that covered bottom areas containing at least 20 percent rocky reef habitat, by area. Captains were directed to drift within the cells over areas of rocky habitat for a maximum of 15 minutes per drift, so that at least three areas of habitat within each cell would be sampled. Captured fish were identified to species, measured to the nearest millimeter in fork length, tagged with an external t-bar anchor tag, and returned to the water, using a descending device if needed. Each site was sampled five times, three from June-October 2014, and twice from May-August 2015.
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Archival data from fishing surveys conducted during cruises by the Marine Fisheries Institute.
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TwitterGeneral Fish Surveys compare trends among the fishery species in Lake Perris utilizing data that calculates catch per unit of effort (CPUE), relative abundance of each species and several population indices including length distribution, weight-length relationships, relative weight (Wr), and proportional size distributions (PSD) This data and metadata were submitted by California Department of Fish and Wildlife (CDFW) Staff though the Data Management Plan (DMP) framework with the id: DMP000450. For more information, please visit https://wildlife.ca.gov/Data/Sci-Data.
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TwitterThe fish dataset presents results from High Mountain Lakes (HML), SLIP (Sierra Lakes Inventory), and Redwood Sciences Laboratory (RSL) project fishery surveys. Both projects collected data on high elevation waters in the Sierra Nevada and mountains of Northern California using a standard protocol. Surveys of fish, amphibians, habitat, and stream barriers were done at each site between late-May and October. Fish surveys were mainly done using standardized 6 panel monofilament gill nets, set for 8-12 hours. Fish species, length, weight, and sex are recorded for each individual. As many sites were only visited once, the data presented represent a "snapshot" view of the fish population in a particular lake. SLIP surveys were done in the John Muir Wilderness by Roland Knapp's crews in 1995-1996. HML surveys were done in Regions 2, 4 and 6 by CA DFW crews between 2001 and 2010. CDFW crews did not survey within National Park boundaries and no SLIP data from National Parks is included here. RSL surveys were conducted between 2001 and 2006, and additional surveys in Northern California ranges were conducted by HML crews in 2008 and 2010. As of May 2010, approximately 85% of the total mapped waters in the High Mountain Lakes range have been surveyed. It should be noted that the High Mountain Lakes expanded in 2007 to include water bodies in cascades frog range. "Baseline" survey types indicate a full survey was done at the site, including amphibian, fish, habitat characteristics, tributary characteristics, and photos. Generally this survey type occurs during the initial visit to a particular site. "Monitoring" surveys are repeat surveys of fish or amphibian populations at a site, and generally do not include habitat or stream barrier data. WHAT EACH RECORD REPRESENTS: This dataset represents field data collected in high elevation Sierra Nevada and Northern California lakes, meadows, streams, and springs. If no fish were observed, each record represents a single fish survey. If fish are present, a record exists for each species observed during a single survey. According to protocol, lakes with fish are surveyed with gill nets and re-surveyed every fifteen years. Lakes with gill net surveys have average, maximum, and minimum fish length and weight for each species caught at each lake. Visual surveys took place in meadows and streams; if fish were present in these waters a record exists which identifies the species. Lakes are identified by a unique "CA Lakes" identifying number corresponding to CDFW's CA_Lakes.shp GIS dataset. Some sites may not yet exist on CA_Lakes.shp: the GIS dataset is updated annually with data obtained by HML crews and digitized by CDFW Staff. Stream sites do not exist on CA_Lakes, but HML is surveying and monitoring streams with known yellow-legged frog populations, and these surveys are part of the amphibian dataset. All sites presented in this dataset are represented on the High_mountain_lakes.shp GIS dataset. Contact Sarah Mussulman (916) 358-2838 for additional information about High_mountain_lakes.shp.
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The data is reported in Catch Per Unit Angler (CPUA) which is a simple calculation of the number of fish caught divided by the number of anglers targeting the fishery type within a particular 1' block in a given period. CRFS Catch records for all caught species were aggregated into 5-year bins from 2004-2024 as well as the entire period. All catch of these species were summed and attributed to the blocks (1' x 1' area) which were recorded during the survey interview. If multiple blocks were recorded, then the catch data was divided across all blocks indicated. Catch data is further divided into 'kept' and 'released' fish which is used to calculate a CPUA for only kept fish and a CPUA for both kept and released fish. The total number of anglers targeting any species in each block was calculated for each time frame. An angler represents a single person fishing in a block on a single day. The data is limited to blocks that had 3 or more reported fishing trips over the entire time period.
Effort under the 'All' trip type is an aggregation of all anglers surveyed. This includes anglers from specific trip types such as highly migratory, salmon, bottomfish, coastal migratory, inshore, other anadromous, invertebrates and anything.
Raw data from 2004 - 2015 was extracted from the Pacific States Marine Fisheries Commission (PSMFC) legacy RecFIN database. Data from 2016 - 2024 was extracted from the CDFW's CRFS data system. The data is divided into reported catch (includes reported kept, reported released alive, and reported released dead), observed kept catch, effort and location tables.
Attributes:
Block Box: 1' grid where the data was reported.
Catch: The species or the name of the species group whose individual catch records were aggregated.
Trip Type: Trip type category that includes the primary target species for the angler that was aggregated. This layer is an aggregation of all angler effort.
All_04_09: CPUA for both kept and released catch for 2004-2009.
All_10_15: CPUA for both kept and released catch for 2010-2015.
All_16_20: CPUA for both kept and released catch for 2016-2020.
All_21_24: CPUA for both kept and released catch for 2021-2024.
Kept_04_09: CPUA for only kept catch for 2004-2009.
Kept_10_15: CPUA for only kept catch for 2010-2015.
Kept_16_20: CPUA for only kept catch for 2016-2020.
Kept_21_24: CPUA for only kept catch for 2021-2024.
CPUA_All: CPUA for both kept and released catch for the entire 2004-2024 period.
CPUA_Kept: CPUA for only kept catch for the entire 2004-2024 period. This field is used as the source of the symbology for this layer. Gray blocks represent where effort occurred, but no catch was reported.
Samples: The number of individual survey samples that reported fishing in block for the entire period.
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The Environment Agency undertakes fisheries monitoring work on rivers, lakes and transitional and coastal waters (TraC).
This dataset contains site and survey information, the numbers and species of fish caught, fish lengths, weights and ages (where available), for all the freshwater fish surveys carried out across England from 1975 onwards.
Notes: - These survey data are stored in an archive more commonly known as the NFPD (National Fish Populations Database). - This dataset contains Freshwater fish surveys only. - Third party data held on the NFPD are excluded from the dataset. - Some historic surveys (particularly in Anglian Central) have incorrect survey lengths and survey widths. These can be identified by a survey length of 1 and a survey width that is equal to the area. The survey areas are correct. This is due to the migration of old historic data from previous databases into the NFPD. - Approved for Access under AfA347.
Please see the Dataset Documentation for further detail.