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.

Drone-Assisted Reef Fish Population Survey Market Outlook

According to our latest research, the global drone-assisted reef fish population survey market size reached USD 412.7 million in 2024, driven by increasing demand for non-invasive, real-time, and accurate marine ecosystem monitoring. The market is exhibiting a robust growth trajectory with a CAGR of 12.6% during the forecast period, and is projected to attain USD 1,205.4 million by 2033. This growth is primarily propelled by technological advancements in drone capabilities, rising environmental concerns, and the need for efficient marine biodiversity management.

The primary growth factor in the drone-assisted reef fish population survey market is the escalating global awareness regarding the critical role of coral reefs and associated fish populations in maintaining marine biodiversity. Coral reefs are under unprecedented threat due to climate change, overfishing, and pollution, making precise and timely data collection essential for conservation efforts. Drones have revolutionized the way researchers and conservationists monitor marine life by enabling high-resolution, large-scale surveys at a fraction of the traditional cost and effort. Their ability to access remote or hazardous areas, combined with advanced imaging and AI-driven analytics, has significantly improved the accuracy and efficiency of population assessments, habitat mapping, and behavioral studies in reef ecosystems.

Another significant growth driver is the rapid technological innovation in drone hardware and software. The integration of advanced imaging systems, such as multispectral and hyperspectral cameras, coupled with AI-based analytics, has enabled the identification of fish species, assessment of population densities, and monitoring of behavioral patterns with unprecedented precision. These technological advancements are not only enhancing data quality but also reducing the need for human divers, thereby minimizing the disturbance to sensitive reef habitats and ensuring the safety of research personnel. The expanding applications of drone technology in marine research, including species identification, habitat mapping, and behavioral studies, are further fueling market growth.

The increasing involvement of government agencies, research institutes, and environmental organizations in marine conservation initiatives is also a key factor driving market expansion. Governments worldwide are implementing stricter regulations and investing in advanced technologies to monitor and protect marine biodiversity. Collaborative projects involving fisheries, academic institutions, and non-governmental organizations are leveraging drones for large-scale reef monitoring and data collection. These efforts are supported by international funding and policy frameworks aimed at achieving sustainable development goals related to ocean health. The growing emphasis on data-driven decision-making in marine management is expected to sustain the upward momentum of the drone-assisted reef fish population survey market in the coming years.

From a regional perspective, the Asia Pacific region dominates the market, accounting for the largest share in 2024, followed by North America and Europe. This trend is attributed to the extensive coral reef systems in Southeast Asia and Australia, coupled with significant investments in marine research and conservation. The Middle East & Africa and Latin America are also witnessing increasing adoption of drone technologies for reef monitoring, driven by growing environmental awareness and international collaborations. Regional disparities in technological infrastructure and regulatory frameworks, however, continue to influence market penetration and growth rates across different geographies.

Drone Type Analysis

The drone-assisted reef fish population survey market is segmented by drone type into fixed-wing, rotary-wing, and hybrid drones, each offering distinct advantages for specific applications. Fixed-wing drones are favored for their ex

The Northern Shrimp Survey was initiated in 1983 by the Atlantic States Marine Fisheries Commission (ASMFC) and monitors the relative abundance (number of shrimp), biomass (weight of shrimp), and composition of the northern shrimp stock throughout the Gulf of Maine. The data give an understanding of year class strength and sex stage and maturity of shrimp in the population. The survey focuses...

The power of fishery-independent surveys for stock assessments and management decisions is in their consistency over time and space. Although the preference is to limit change to survey execution, such changes may be necessary. In multi-species surveys, changes that improve metrics for one species may be a detriment to survey performance for others. In 2010, the Southeast Reef Fish Survey (SERFS) was formed to better address sampling needs off the U.S. Southeast Atlantic coast by intensifying a historical chevron trap survey (MARMAP), especially at the northern and southern extent of the sampling range. We used several performance metrics (encounter rate, annual coefficient of variability, standard error, and relative abundance index values) to determine the impact of this change in survey coverage on trend estimates for three commonly encountered species with varying centers of distribution in the survey region. Gray Triggerfish (Balistes capriscus) is found throughout the range of both surveys (i.e. centrally-distributed), while White Grunt (Haemulon plumierii) and Red Snapper (Lutjanus campechanus) are centered near the northern and southern extent of the sampling range, respectively. For Gray Triggerfish, the survey intensification had no effect on encounter rate, but reduced the coefficient of variation and indicated that the historical index of relative abundance may have been overestimated. For White Grunt, the survey intensification slightly improved CV but did not affect the index of relative abundance value or encounter rate. For Red Snapper, SERFS increased encounter rates, reduced CV overall, and detected a population increase 5 years earlier than MARMAP. Overall, the intensification of the survey improved at least one performance metric for each species and showed few deleterious effects on performance, suggesting that intensification of the survey was a net-positive for the accurate estimation of population trends in several species of interest.

Community composition data from multi-pass electrofishing surveys for assessing fish populations in headwater streams of the Adirondack Mountains, New York, USA. Each row represents one individual fish. This spreadsheet contains 11 columns. The first 7 columns describe the data (year collected, local site ID, stream name, latitude, longitude, USGS site number, and electrofishing pass number) and the remaining 4 columns describe each individual fish (common name, scientific name, total length (mm) and weight (g)). These data support the following publication: Baldigo, B.P., Sporn, L.A., George, S.D., and Ball, Jacob, in press. Efficacy of environmental DNA to detect and quantify Brook Trout Salvelinus fontinalis, populations in streams of the Adirondack Mountains, New York. Trans. Amer. Fish. Soc. na, na; http://dx.doi.org/10.1577/.

This dataset includes: 1) microhabitat use data for fish 100 mm or larger; 2) reach fish data; and 3) reach habitat data for the Santa Ana Sucker (Catostomus santaanae) and the Arroyo Chub (Gila orcutti) in the Santa Ana River, California. Habitat availability data was not collected in 2017.

The 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 Knapps 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

Lake Erie Biological Station (LEBS), located in Sandusky, Ohio, is a field station of the USGS Great Lakes Science Center (GLSC). LEBS is the primary federal agency for applied fisheries science excellence in Lake Erie. Since 2004, LEBS has participated in a collaborative, multiagency effort to assess forage fish populations in the western basin of Lake Erie. Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based based fishery management, and supports decision making that considers food-web interactions. The objectives of this survey were to provide estimates of densities of key forage and predator species in the western basin of Lake Erie, to assess seasonal and spatial distributions of fishes, and to assess year class strength. In 2012, the original vessel used since 2004, the R/V Musky II, was retired and replaced with the R/V Muskie. The change in vessel necessitated changing the gear used to capture fish. Previous surveys used a different catch processing protocol that did not include measurements of biomass or lengths of all species; thus, those historical data are not compatible with the current data format. Under the new protocol, 41 stations were sampled during June (Spring) and September (Autumn). The 2013 western basin survey season marked the first year in which the grid sampling design was employed in both spring and autumn. Thus, we present data starting from 2013. The data sets will automatically update with new data as surveys are completed in future years.

The 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.

This dataset includes 2023 reach fish data and reach habitat data collected to support development of the upper Santa Ana River Habitat Conservation Plan for the Santa Ana Sucker (Catostomus santaanae) and the Arroyo Chub (Gila orcuttii) in the Santa Ana River, California.

The Environment Agency undertakes fisheries monitoring work on rivers, lakes and transitional and coastal waters (TraC).

This dataset includes site and survey information, together with a detailed breakdown of the salmonid age data into numbers of 0+, >0+, 1+, >1+ age bands (where available), for 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. - The dataset 'Freshwater fish surveys (NFPD)' may also be relevant, it contains fish lengths, weights, and the raw age data (where available).

Please see the Dataset Documentation for further detail. Attribution statement: © Environment Agency copyright and/or database right 2017. All rights reserved.

The dataset includes age- and length-based catch per unit effort data for commercial fish species collected during the Irish Ground Fish trawl survey. AccConstrDescription=This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials. AccConstrDisplay=This dataset is licensed under a Creative Commons Attribution 4.0 International License. AccConstrEN=Attribution (CC BY) AccessConstraint=Attribution (CC BY) AccessConstraints=ICES Data Policy: https://www.ices.dk/data/guidelines-and-policy/Pages/ICES-data-policy.aspx Acronym=IE-IGFS BrackishFlag=0 CDate=2010-12-22 cdm_data_type=Other CheckedFlag=0 Citation=Fish trawl survey: Irish Ground Fish Survey for commercial fish species. ICES Database of trawl surveys (DATRAS). The International Council for the Exploration of the Sea, Copenhagen. 2010. Online source: http://ecosystemdata.ices.dk.. Comments=None ContactEmail=None Conventions=COARDS, CF-1.6, ACDD-1.3 CurrencyDate=None DasID=2762 DasOrigin=Monitoring: field survey DasType=Data DasTypeID=1 DescrCompFlag=0 DescrTransFlag=0 Easternmost_Easting=-3.459 EmbargoDate=None EngAbstract=The dataset includes age- and length-based catch per unit effort data for commercial fish species collected during the Irish Ground Fish trawl survey. EngDescr=Fisheries Science Services (FSS) carries out the annual Irish Groundfish Survey (IGFS) in the fourth quarter of each year as part of a larger coordinated survey effort with our EU neighbours (France to the south; and the UK to the north).

A broad spectrum of data is collected during the survey, but the overriding objective is to provide information on commercially exploited fish stocks. In particular the survey provides an index of the proportion of juveniles in the stock, which in turn gives an indication of its spawning success. This is an important source of information not available from commercial landings due to the necessary minimum fish length restrictions on commercial catches.

In addition, the survey provides data on species and environmental parameters in areas of both high and low commercial activity. This gives a better context to data for the entire survey area as opposed to focusing entirely on traditional fishing hot-spots that can remain stable while significant changes in surrounding background abundance and distribution go un-noticed.

The primary goal of the groundfish survey is to develop estimates of juvenile abundance for important species. Measurements of the abundance of juvenile fish are a critical measure of the health of a stock, serving as an annual indication of recruitment (the number of newly spawned fish which enter the population each year) success or failure. Most importantly, they allow forecasting of future commercial abundance.

Survey provides data on the distribution and biology of commercial and non-commercial species of ecological interest, as well as hydrographic and environmental observations. When these data are combined with annual recruitment indices they can help identify the possible causes driving year-class success or failure, and allow us to see long-term changes in populations that may have been caused by fishing, pollution, or climate change. This spatial dataset comprises the haul station location from the trawl survey. The Irish Groundfish Survey feeds into the International Bottom Trawl Survey [ie. IBTS] for international reporting.

The Irish West Coast Groundfish Survey started in 1990 and for the first two years consisted of circa 25 stations concentrated around the Irish coast in ICES Areas Via South and VIIb. Adverse weather in 1992 limited station coverage to only 4 stations which effectively broke the time series.

The survey was re-established in 1993 and has consisted of circa 70 stations, for Parts A and B combined, since then. Spatial coverage was extended west out to the 200m contour, but remains as Via South and VIIb.

Due to the restrictions of the current and previous research vessel commercial trawlers have been contracted to carry out the survey work. Wherever possible continuity of vessel and gear has been maintained and standard IBTS methodology applied. However, due to reduced staffing on commercial vessels it has rarely been possible to completely sort the catch.

Until 2000 all cod were sorted from the catch and then a sub-sample of two baskets was taken and completely sorted. From 2001 onwards, in response to an overall review of survey sampling undertaken during the IPROSTS Project (Anon 2001), the catch is completely sorted for all target species and a qualitative assessment made of the residual catch as a minimum.

The Irish surveys use an ICES rectangle based sampling strategy. The sampling design attempts to allocate at least two stations per rectangle (where the sea area is appropriate). Stations are selected randomly within each rectangle from known clear tow positions.

On the WCGS and ISCGS circa 70 fishing stations are planned on each survey every year. The number of hauls is adjusted according to the ship time available at sea.

The Irish West Coast Groundfish Survey is carried out in two parts: Part A covers ICES Division Via (south) and VIIb (north); Part B covers ICES Division VIIb and VIIj. The survey is conducted from 15 to 300 m depths during the fourth quarter (October - November). The Irish West Coast Groundfish Survey is carried out on chartered commercial fishing vessels. Whilst the same vessel (MFV Marliona, 224 gross tonnage and 30 m LOA) has normally been used each year for Part A and Sionann for Part B, in 2001 Part B was conducted from the MFV Regina Ponti (34.5 m LOA). Both vessels use a Rockhopper net with 12 inch discs and 11 inch Thyboron doors. The nets are fitted with a 20 mm codend liner. Gear performance throughout the survey is monitored using Furuno Ch24 (Headline Monitor).

The Irish Sea Celtic Ground Survey commenced in 1997 and evolved from an earlier Irish Sea Juvenile Fish Survey. As a consequence early survey stations concentrated largely, though not exclusively, around a number of shallow spawning areas along the Irish east coast in VIIa. These positions were expanded in combination with clear tows provided by the industry and CEFAS as well as some exploratory tows.

Spatial coverage therefore extended into the western Irish Sea from 2001 into the area around the Isle of Man, Liverpool and Cardigan Bays and the Welsh coast. The survey is carried out on the Irish research vessel the R.V. Celtic Voyager.

The sampling procedure on board conforms to the IBTS standard protocols and as such all cod are sampled and aged, the entire catch is sorted and then sub-sampled as and where appropriate.

The Irish survey in the Irish Sea and Celtic Sea covers ICES Division VIIa and VIIg. The survey is conducted from 10 to 150 m depths during the fourth quarter (November-December) by the RV Celtic Voyager. This vessel is 32 m in length with gross tonnage of 340 t. The fishing gear used is a GOV 28.9/37.1 Trawl with Morgere Kite (0.85 by 0.85m). Mean vertical opening is 6 m and door spread 48 m. Morgere Polyvalent doors (Type AA4.5) are used and gear performance is monitored throughout the survey using the SCANMAR (RX400) net monitoring system (Headline height, Door spread).

Trials on the new 65m research vessel, the R.V. Celtic Explorer, are due to commence in late 2002. Therefore, from 2003 onwards all Irish Surveys will be conducted on this new vessel, starting around mid October through to late November. FreshFlag=0 geospatial_lat_max=56.5 geospatial_lat_min=50.12 geospatial_lat_units=degrees_north geospatial_lon_max=-3.459 geospatial_lon_min=-14.555 geospatial_lon_units=degrees_east infoUrl=None InputNotes=None institution=MI, ICES License=https://creativecommons.org/licenses/by/4.0/ Lineage=None MarineFlag=1 Northernmost_Northing=56.5 OrigAbstract=None OrigDescr=None OrigDescrLang=English OrigDescrLangNL=Engels OrigLangCode=en OrigTitle=None OrigTitleLang=None OrigTitleLangCode=None OrigTitleLangNL=None Progress=Completed PublicFlag=1 ReleaseDate=None ReleaseDate0=None RevisionDate=None SizeReference=More than 170,153 records sourceUrl=(local files) Southernmost_Northing=50.12 standard_name_vocabulary=CF Standard Name Table v70 StandardTitle=Irish Ground Fish Survey for commercial fish species subsetVariables=ScientificName,BasisOfRecord,YearCollected,MonthCollected,DayCollected,sex,aphia_id TerrestrialFlag=0 time_coverage_end=2008-11-28T11:33:00Z time_coverage_start=2003-10-22T09:16:00Z UDate=2022-08-09 VersionDate=None VersionDay=None VersionMonth=None VersionName=None VersionYear=None VlizCoreFlag=1 Westernmost_Easting=-14.555

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.

These products are Approved for Access under AfA347.

The National Fish Populations Database (NFPD) holds information collected from fisheries monitoring work on rivers, lakes and transitional and coastal waters (TraC). This monitoring work is undertaken by the Environment Agency and by third parties. All the relevant data associated with NFPD freshwater fish surveys, such as survey information, site information, the numbers and species of fish caught, fish lengths, weights and ages (where available), can be obtained from these relational datasets. The data is provided as a set of relational data tables because there is just too much data to include all relevant information in all tables. A basic understanding of fisheries science and relational databases is assumed. Available datasets/tables: • Freshwater Fish Counts for all species for all Areas and all Years • Freshwater Salmonid Age Band (0+, >0+, age unknown) Counts for all Areas and Years • Freshwater Salmonid Age Band (0+, 1+, >1+, age unknown) Counts for all Areas and Years • Breakdown of freshwater fish count data types (individually measured, banded measured and bulk counted fish) • Individually measured freshwater fish records • Banded measured freshwater fish records • Bulk counted freshwater fish records The tables can be related to each other using any one of the unique identifiers - survey_id, survey_species_id, species_id and species_run_id. However, the Freshwater Fish Counts and the Salmonid Age Band datasets have no dependence on the other tables and can therefore also be used in isolation. Third party data and surveys not flagged as ‘Completed’ are excluded. For more information about the available datasets/tables, please see the Dataset Documentation. Attribution statement: © Environment Agency copyright and/or database right 2017. All rights reserved.

These data represent fish census surveys in Great Smoky Mountains National Park conducted using the Delury Method of Three-Pass Depletion electrofishing. In 2024, fish were collected, sorted by species, and weighed at 34 unique sites from a total of 22 streams ranging in size from first to third-order waterways. These streams are surveyed on an annual basis to monitor population trends over time.

National Fish Populations Database (NFPD): Freshwater Fish Counts for all Species for all Areas and all years. This is for Approval for Access product AfA347. NFPD consists of information collected from fisheries monitoring work on rivers, lakes and transitional and coastal waters (TraC). This monitoring work is undertaken by the Environment Agency.

This particular dataset reports fish counts per run, total fish counts, Carle and Strub population estimates for quantitative surveys and log abundance data (where applicable) for ALL Species (including hybrids) caught on each freshwater survey for all areas and years. Site and survey information and surveys where zero fish were recorded are also included.

Note: The initial version of this dataset (published February 2016) did not contain Carle and Strub population estimates for quantitative surveys or surveys where zero fish were recorded. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.

Results of annual fish population surveys on Delaware's publicly-accessible freshwater ponds and lakes. Surveys can be affected by weather, access, and other factors and may not directly reflect fish populations. For interpretation and further research, please see reports from the Division of Fish and Wildlife.

United States Employment: Farming, Fishing & Forestry data was reported at 1,079.000 Person th in Jun 2018. This records an increase from the previous number of 1,056.000 Person th for May 2018. United States Employment: Farming, Fishing & Forestry data is updated monthly, averaging 1,051.500 Person th from Jan 1983 (Median) to Jun 2018, with 426 observations. The data reached an all-time high of 1,410.000 Person th in Jul 1983 and a record low of 782.000 Person th in Jan 2010. United States Employment: Farming, Fishing & Forestry data remains active status in CEIC and is reported by Bureau of Labor Statistics. The data is categorized under Global Database’s USA – Table US.G013: Current Population Survey: Employment.

NOAA Fisheries and its partners conduct bottom-trawl surveys in 7 regions in the US (Northeast, Southeast, Gulf of Mexico, West Coast, Gulf of Alaska, Bering Sea, Aleutian Islands). These surveys are designed to collect information on the seasonal distribution, relative abundance, and biodiversity of fish and invertebrate species found on the US continental shelves. Over 900 species of fish and...

This layer contains data accessed from the EA Ecology and Fish Data Explorer, in particular, from the NFPD (National Fish Population Database). Sampling sites are categorised by the date of the most recent sample (as of the last update). Each site has been attributed to its local CaBA Catchment Partnership.Data last updated 1st December 2023. We are working on updating this dataset more regularly.More details are available on the Data Services Platform.