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| Dataset Title: | California Current Pelagic Fish Surveys, 1950-1989, Anchovy Schools
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| Institution: | NMFS/SWFSC/FRD, CDFG, SIO (Dataset ID: FRDPelagicAnchovy) |
| Range: | longitude = -122.0 to -114.4°E, latitude = 28.6667 to 36.65°N, time = 1974-04-17T16:43:00Z to 1979-02-18T22:55:00Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
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Zoom: ![[The graph you specified. Please be patient.]](https://upwell.pfeg.noaa.gov/erddap/tabledap/FRDPelagicAnchovy.png?longitude,latitude,stationNo&.draw=markers&.marker=5%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff)
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Attributes {
s {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.3544898e+8, 2.882265e+8;
String axis "T";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range 28.6667, 36.65;
String axis "Y";
String ioos_category "Location";
String long_name "Latitude";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range -122.0, -114.4;
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
}
cruiseNo {
String description "A 5-character code consists of the last two digits of the year, the initial of the vessel, and the number of the cruise in that year. For example, 86X01, 66A01.";
String ioos_category "Other";
}
stationNo {
Float32 actual_range 1.01, 85.07;
String description "It consists of a whole number followed by two decimal digits. The whole number parts are numbered consecutively from the start of each cruise. The decimal digit is used to indicate a different activity at the same location. The whole number part of these stations usually remains the same for each day. The zero numbers of the decimal parts usually denote midwater trawl or other type of stations. For example, 33.00, 101.00.";
String ioos_category "Other";
}
stationType {
String description "The principle activity performed on the station: Acoustic, Bottom Trawl, Hook and Line, Midwater, Night Light, Other, Troll, or Unspecified.";
String ioos_category "Other";
}
diameterMeter {
Int32 _FillValue 2147483647;
Int32 actual_range 5, 290;
String description "The estimated diameter of the anchovy school (lower limit of each 5-meter interval)";
String ioos_category "Other";
String units "m";
}
frequencies {
Int32 _FillValue 2147483647;
Int32 actual_range 1, 332;
String description "The number of occurrences.";
String ioos_category "Other";
}
vesselName {
String description "The name of the vessel used for the survey: Alaska, Chartered Vessels, N.B. Scofield, Paolina T., Yellowfin.";
String ioos_category "Other";
}
stn_area {
String description "The general area where a station was located (from Station table). Fifteen designated areas were used only for years from 1950 - 1965.";
String ioos_category "Other";
}
has2ndLocation {
String description "A Yes or No indication of whether the station engaging activities covering distances and therefore has a second position different from the first location posted. The stations did not cover distances have the same latitude and longitude coordinates posted twice.";
String ioos_category "Other";
}
latitude2 {
Float32 actual_range 28.8167, 36.3333;
String description "2nd north latitude in degrees for stations with activities covering distances.";
String ioos_category "Other";
String units "degrees_north";
}
longitude2 {
Float32 actual_range -122.0067, -114.6667;
String description "2nd west longitude in degrees for stations with activities covering distances.";
String ioos_category "Other";
String units "degrees_east";
}
durationMin {
Int32 _FillValue 2147483647;
Int32 actual_range 6, 880;
String description "Duration of each station";
String ioos_category "Other";
String units "minutes";
}
offDistNauticMiles {
Float32 actual_range 0.2, 70.0;
String description "Offshore distance from the closest mainland or island shoreline measured to the nearest tenth of a nautical mile. (Minimum distance). Distances of 100 nautical miles or more are listed as 99.9.";
String ioos_category "Other";
String units "nm";
}
offdistNauticMiles2 {
Float32 actual_range 0.0, 280.0;
String description "Offshore distance from the closest mainland or island shoreline measured to the nearest tenth of a nautical mile. (Maximum distance for stations covering distance). Distances of 100 nautical miles or more are listed as 99.9.";
String ioos_category "Other";
String units "nm";
}
depthFathoms {
Int32 _FillValue 2147483647;
Int32 actual_range 6, 1050;
String description "Depth of water to the bottom in fathoms. It is a minimum when second depth of range is present.";
String ioos_category "Other";
String units "fathoms";
}
depthFathoms2 {
Int32 _FillValue 2147483647;
Int32 actual_range 9, 1250;
String description "Maximum depth of water to the bottom in fathoms.";
String ioos_category "Other";
String units "fathoms";
}
ssTempCel {
Float32 actual_range 0.0, 23.8;
String description "Sea Surface Temperature from bucket thermometer to the nearest one-tenth of a degree Celsius.";
String ioos_category "Other";
String units "degree_C";
}
btDataTaken {
String description "A Yes or No indication of whether a Bathythermograph cast was made for this station and data recorded.";
String ioos_category "Other";
}
methodLocating {
String description "Method used to locate or attract fish whether successful or not. These methods are Visual, Light, Fathometer, and Sonar.";
String ioos_category "Other";
}
stn_methodCapture {
String description "The general area where a station was located (from Station table). Fifteen designated areas were used only for years from 1950 - 1965.";
String ioos_category "Other";
}
stn_methodCapture2 {
String description "The second gear used to capture animal (from Station table).";
String ioos_category "Other";
}
milesSounded {
Float32 actual_range 0.0, 66.0;
String description "Miles sounded to the nearest nautical miles. (Value for this field equals to Miles Scouted for Visual Scouting event).";
String ioos_category "Other";
String units "nm";
}
stn_milesScouted {
Float32 actual_range 0.0, 62.0;
String description "Miles scouted in nautical miles (from Station table). The distance during which a visual watch was maintained for surface schools.";
String ioos_category "Other";
String units "nm";
}
depthCaptureFathoms {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 180;
String description "For trawl stations, it is the depth of capture in fathoms or depth of trawl was fished. For Echo sound stations, it is the depth of school from the surface. It is a mean depth of all schools detected during this station.";
String ioos_category "Other";
String units "fathoms";
}
schoolType {
String description "School types appearing on echo sounder during trawl tow: Comets, Shallow Layer <=40 fathoms, Deep Layer > 40 fathoms, Large Single Globular, Deep Plume >40 fathoms, Shallow Plume <=40 fathoms, Continuous Surface Scatter, Scattered Groups.";
String ioos_category "Other";
}
surfaceAreaM2 {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 791332;
String description "Calculated school surface area of all anchovy schools on station in square miles. Each school was considered to have round shaped. Diameter considered to be the horizontal range from the near to the far side of the school as measured from sonar gram recording paper.";
String ioos_category "Other";
String units "sq mi";
}
lenEgmm {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 0;
String description "Length of echogram registered by fish school in millimeters measured horizontally in a plane parallel to the sea surface. The school depth factor was minimized by measuring only schools shallower than 40 fathoms. This length varies with recorder paper speed, vessel speed, school depth, transducer beam width, exposure to sonic beam, and school size. Paper feed rate is 12.5 mm per minute during which the vessel travels approximately 1000 feet at a 10-knot speed. Fish school sizes are represented on an approximate relative scale by their echogram lengths.";
String ioos_category "Other";
String units "mm";
}
idMethod {
String description "Species identification method: Echo characteristic, Trawl catches nearby, Hook and Line, Visible from Surface.";
String ioos_category "Other";
}
visSchoolPresent {
String description "A \"Yes\" or \"No\" designation if schools of fish sighted at or near surface during a station.";
String ioos_category "Other";
}
visSignPresent {
String description "A 'Yes' or 'No' designation indicating fish present during a station. Signs include birds, porpoises, sea lions and predator fishes";
String ioos_category "Other";
}
sonarRangeMeters {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 4500;
String description "Horizontal range in meters over which sonar was most effective in detecting schools. This range may be any interval within total range of equipment and is range from which all school counts were made.";
String ioos_category "Other";
String units "m";
}
noOfSpec {
Int32 _FillValue 2147483647;
Int32 actual_range 1, 7;
String description "Number of species caught, observed or detected at the station.";
String ioos_category "Other";
}
}
NC_GLOBAL {
String cdm_data_type "Point";
String Conventions "CF-1.6, ACDD-1.3, COARDS, NCCSV-1.1";
String creator_email "someone@something";
String defaultGraphQuery "longitude,latitude,stationNo&.draw=markers";
Float64 Easternmost_Easting -114.4;
String featureType "Point";
Float64 geospatial_lat_max 36.65;
Float64 geospatial_lat_min 28.6667;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -114.4;
Float64 geospatial_lon_min -122.0;
String geospatial_lon_units "degrees_east";
String history
"2024-04-27T12:52:10Z (local files)
2024-04-27T12:52:10Z http://upwell.pfeg.noaa.gov/tabledap/FRDPelagicAnchovy.das";
String infoUrl "http:something.com";
String institution "NMFS/SWFSC/FRD, CDFG, SIO";
String license
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
Float64 Northernmost_Northing 36.65;
String sourceUrl "(local files)";
Float64 Southernmost_Northing 28.6667;
String standard_name_vocabulary "CF Standard Name Table v70";
String subsetVariables "cruiseNo,stationNo,stationType,stn_area,vesselName,stn_methodCapture,stn_methodCapture2,methodLocating,schoolType,idMethod";
String summary "The diameter and frequencies of the 7155 anchovy schools detected during acoustic survey for the years from 1974 to 1979. Listed diameter is the lower limit of each 5-meter interval Between 1950 and 1989, the California Department of Fish and Game (CDFG) conducted an extensive series of pelagic fish survey cruises. The original purpose of these surveys was to determine the total pelagic and bathypelagic fisheries resources available in the California Current System, as well as their abundance, distribution, and potential yield. The U.S. Federal Government provided a major portion of funds for this work (Mais 1974a). A midwater trawl was made at most stations and most trawling was conducted at night. Biological data (length, sex, maturity, and age) were collected from samples of sardines, anchovies, Pacific mackerel, and jack mackerel. Length frequencies were recorded and total count determined for all other species. Bathythermograph casts and turbidity measurements were made whenever possible. In addition to the trawl stations, from 1950 through 1962 the survey used light to attract fish and dynamite or a blanket net to collect samples in certain locations to provide live sardines for genetic studies and for comparison to midwater trawl results. Starting in 1963, midwater trawl was the primary sampling tool. (Kenny Mais, Report for the month of January 1964, Marine Resources Operations, CDFG.) However, in the latter half of 1966, the scope and methodology of the cruises changed and the areas covered broadened. These surveys, titled Fisheries Resources Sea Surveys, were accomplished by a line transect method using echo sounder or sonar to detect and determine fish biomass, with a primary focus on northern anchovy. Mid-water trawling, echogram characteristics, and visual sightings were used to identify fish species. The expanded 'Sea Surveys' were created under a federal aid program (Commercial Fisheries Research and Development Act of 1964, Public Law No. 88-309). Data collected during these cruises from 1950 - 1989 were compiled and presented yearly, in California Cooperative Oceanic Fisheries Investigations (CalCOFI) Data Reports, volumes 1 - 39 (volume 7 contained data for both 1956 and 1957). These hard copy reports present the basic raw data in tabular form and they were our sole source for this legacy database.";
String time_coverage_end "1979-02-18T22:55:00Z";
String time_coverage_start "1974-04-17T16:43:00Z";
String title "California Current Pelagic Fish Surveys, 1950-1989, Anchovy Schools";
Float64 Westernmost_Easting -122.0;
}
}
Data Access Protocol (DAP) and its
selection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
Tabledap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names,
followed by a collection of
constraints (e.g., variable<value),
each preceded by '&' (which is interpreted as "AND").
For details, see the tabledap Documentation.