FRDPelagicLength

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California Current Pelagic Fish Surveys, 1950-1989, Length Frequencies

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FRDPelagicLength

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	cdm_data_type	String	Point
attribute	NC_GLOBAL	Conventions	String	CF-1.6, ACDD-1.3, COARDS, NCCSV-1.1
attribute	NC_GLOBAL	creator_email	String	someone@something
attribute	NC_GLOBAL	defaultGraphQuery	String	longitude,latitude,stationNo&.draw=markers
attribute	NC_GLOBAL	Easternmost_Easting	double	-109.8833
attribute	NC_GLOBAL	featureType	String	Point
attribute	NC_GLOBAL	geospatial_lat_max	double	41.9617
attribute	NC_GLOBAL	geospatial_lat_min	double	22.8833
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-109.8833
attribute	NC_GLOBAL	geospatial_lon_min	double	-125.0
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	http:something.com
attribute	NC_GLOBAL	institution	String	NMFS/SWFSC/FRD, CDFG, SIO
attribute	NC_GLOBAL	license	String	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.
attribute	NC_GLOBAL	Northernmost_Northing	double	41.9617
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	22.8833
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v70
attribute	NC_GLOBAL	subsetVariables	String	cruiseNo,stationNo,stationType,commonName,scientificName,stn_area,vesselName,lengthUnit,stn_methodCapture,stn_methodCapture2,methodLocating,schoolType,idMethod
attribute	NC_GLOBAL	summary	String	32,408 length frequencies and a total 177,775 fish measured for the following seven species caught during cruises from 1950 - 1989: northern anchovies, jack mackerel, Pacific hake, Pacific saury and Pacific sardines. About 60% of the fish were northern anchovy. 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.
attribute	NC_GLOBAL	time_coverage_end	String	1989-10-08T12:36:00Z
attribute	NC_GLOBAL	time_coverage_start	String	1950-01-11T04:15:00Z
attribute	NC_GLOBAL	title	String	California Current Pelagic Fish Surveys, 1950-1989, Length Frequencies
attribute	NC_GLOBAL	Westernmost_Easting	double	-125.0
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	-6.302727E8, 6.2385336E8
attribute	time	axis	String	T
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	latitude		float
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	float	22.8833, 41.9617
attribute	latitude	axis	String	Y
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		float
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	actual_range	float	-125.0, -109.8833
attribute	longitude	axis	String	X
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	cruiseNo		String
attribute	cruiseNo	description	String	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.
attribute	cruiseNo	ioos_category	String	Other
variable	stationNo		float
attribute	stationNo	actual_range	float	1.0, 176.0
attribute	stationNo	description	String	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.
attribute	stationNo	ioos_category	String	Other
variable	stationType		String
attribute	stationType	description	String	The principle activity performed on the station: Acoustic, Bottom Trawl, Hook and Line, Midwater, Night Light, Other, Troll, or Unspecified.
attribute	stationType	ioos_category	String	Other
variable	speCode		int
attribute	speCode	_FillValue	int	2147483647
attribute	speCode	actual_range	int	380, 5140
attribute	speCode	description	String	A maximum of 5-digit numeric species codes used by the Sea Survey data system throughout the years.
attribute	speCode	ioos_category	String	Other
variable	ITIScode		int
attribute	ITIScode	_FillValue	int	2147483647
attribute	ITIScode	actual_range	int	82371, 172412
attribute	ITIScode	description	String	Species code used in the Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN). Each TSN number/code used is unique, persistent, non-intelligent identifier for a scientific name in the context of the ITIS. There are a couple of duplicate ITIS numbers for one Sea Survey species code, sardine or sardine larvae are listed under different SeaSurvey Data base speCodes but they have the same ITIS code.
attribute	ITIScode	ioos_category	String	Other
variable	commonName		String
attribute	commonName	description	String	Common name for the species, e.g., Market Squid.
attribute	commonName	ioos_category	String	Other
variable	scientificName		String
attribute	scientificName	description	String	Scientific name for the species, e.g., Loligo opalescens.
attribute	scientificName	ioos_category	String	Other
variable	lengthUnit		String
attribute	lengthUnit	description	String	Measurement units: Millimeter Standard length (MM-SL), Millimeter Fork Length (MM-FL), Millimeter Dorsal Mantle length (squid measurement).
attribute	lengthUnit	ioos_category	String	Other
variable	length		float
attribute	length	actual_range	float	5.5, 630.0
attribute	length	description	String	Actual length of the animal in unit specified in the lengthUnit field.
attribute	length	ioos_category	String	Other
variable	frequency		int
attribute	frequency	_FillValue	int	2147483647
attribute	frequency	actual_range	int	1, 86
attribute	frequency	description	String	The number of fish measured at this length.
attribute	frequency	ioos_category	String	Other
variable	vesselName		String
attribute	vesselName	description	String	The name of the vessel used for the survey: Alaska, Chartered Vessels, N.B. Scofield, Paolina T., Yellowfin.
attribute	vesselName	ioos_category	String	Other
variable	stn_area		String
attribute	stn_area	description	String	The general area where a station was located (from Station table). Fifteen designated areas were used only for years from 1950 - 1965.
attribute	stn_area	ioos_category	String	Other
variable	has2ndLocation		String
attribute	has2ndLocation	description	String	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.
attribute	has2ndLocation	ioos_category	String	Other
variable	latitude2		float
attribute	latitude2	actual_range	float	22.8833, 41.9617
attribute	latitude2	description	String	2nd north latitude in degrees for stations with activities covering distances.
attribute	latitude2	ioos_category	String	Other
attribute	latitude2	units	String	degrees_north
variable	longitude2		float
attribute	longitude2	actual_range	float	-125.0, -109.8833
attribute	longitude2	description	String	2nd west longitude in degrees for stations with activities covering distances.
attribute	longitude2	ioos_category	String	Other
attribute	longitude2	units	String	degrees_east
variable	durationMin		int
attribute	durationMin	_FillValue	int	2147483647
attribute	durationMin	actual_range	int	0, 590
attribute	durationMin	description	String	Duration of each station
attribute	durationMin	ioos_category	String	Other
attribute	durationMin	units	String	minutes
variable	offDistNauticMiles		float
attribute	offDistNauticMiles	actual_range	float	0.0, 119.5
attribute	offDistNauticMiles	description	String	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.
attribute	offDistNauticMiles	ioos_category	String	Other
attribute	offDistNauticMiles	units	String	nm
variable	offdistNauticMiles2		float
attribute	offdistNauticMiles2	actual_range	float	0.0, 19.9
attribute	offdistNauticMiles2	description	String	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.
attribute	offdistNauticMiles2	ioos_category	String	Other
attribute	offdistNauticMiles2	units	String	nm
variable	depthFathoms		int
attribute	depthFathoms	_FillValue	int	2147483647
attribute	depthFathoms	actual_range	int	0, 2280
attribute	depthFathoms	description	String	Depth of water to the bottom in fathoms. It is a minimum when second depth of range is present.
attribute	depthFathoms	ioos_category	String	Other
attribute	depthFathoms	units	String	fathoms
variable	depthFathoms2		int
attribute	depthFathoms2	_FillValue	int	2147483647
attribute	depthFathoms2	actual_range	int	0, 1030
attribute	depthFathoms2	description	String	Maximum depth of water to the bottom in fathoms.
attribute	depthFathoms2	ioos_category	String	Other
attribute	depthFathoms2	units	String	fathoms
variable	ssTempCel		float
attribute	ssTempCel	actual_range	float	0.0, 28.9
attribute	ssTempCel	description	String	Sea Surface Temperature from bucket thermometer to the nearest one-tenth of a degree Celsius.
attribute	ssTempCel	ioos_category	String	Other
attribute	ssTempCel	units	String	degree_C
variable	btDataTaken		String
attribute	btDataTaken	description	String	A Yes or No indication of whether a Bathythermograph cast was made for this station and data recorded.
attribute	btDataTaken	ioos_category	String	Other
variable	methodLocating		String
attribute	methodLocating	description	String	Method used to locate or attract fish whether successful or not. These methods are Visual, Light, Fathometer, and Sonar.
attribute	methodLocating	ioos_category	String	Other
variable	stn_methodCapture		String
attribute	stn_methodCapture	description	String	The general area where a station was located (from Station table). Fifteen designated areas were used only for years from 1950 - 1965.
attribute	stn_methodCapture	ioos_category	String	Other
variable	stn_methodCapture2		String
attribute	stn_methodCapture2	description	String	The second gear used to capture animal (from Station table).
attribute	stn_methodCapture2	ioos_category	String	Other
variable	milesSounded		float
attribute	milesSounded	actual_range	float	0.0, 0.0
attribute	milesSounded	description	String	Miles sounded to the nearest nautical miles. (Value for this field equals to Miles Scouted for Visual Scouting event).
attribute	milesSounded	ioos_category	String	Other
attribute	milesSounded	units	String	nm
variable	stn_milesScouted		float
attribute	stn_milesScouted	actual_range	float	0.0, 764.0
attribute	stn_milesScouted	description	String	Miles scouted in nautical miles (from Station table). The distance during which a visual watch was maintained for surface schools.
attribute	stn_milesScouted	ioos_category	String	Other
attribute	stn_milesScouted	units	String	nm
variable	depthCaptureFathoms		int
attribute	depthCaptureFathoms	_FillValue	int	2147483647
attribute	depthCaptureFathoms	actual_range	int	0, 215
attribute	depthCaptureFathoms	description	String	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.
attribute	depthCaptureFathoms	ioos_category	String	Other
attribute	depthCaptureFathoms	units	String	fathoms
variable	schoolType		String
attribute	schoolType	description	String	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.
attribute	schoolType	ioos_category	String	Other
variable	surfaceAreaM2		int
attribute	surfaceAreaM2	_FillValue	int	2147483647
attribute	surfaceAreaM2	actual_range	int	0, 0
attribute	surfaceAreaM2	description	String	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.
attribute	surfaceAreaM2	ioos_category	String	Other
attribute	surfaceAreaM2	units	String	sq mi
variable	lenEgmm		int
attribute	lenEgmm	_FillValue	int	2147483647
attribute	lenEgmm	actual_range	int	0, 0
attribute	lenEgmm	description	String	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.
attribute	lenEgmm	ioos_category	String	Other
attribute	lenEgmm	units	String	mm
variable	idMethod		String
attribute	idMethod	description	String	Species identification method: Echo characteristic, Trawl catches nearby, Hook and Line, Visible from Surface.
attribute	idMethod	ioos_category	String	Other
variable	visSchoolPresent		String
attribute	visSchoolPresent	description	String	A "Yes" or "No" designation if schools of fish sighted at or near surface during a station.
attribute	visSchoolPresent	ioos_category	String	Other
variable	visSignPresent		String
attribute	visSignPresent	description	String	A 'Yes' or 'No' designation indicating fish present during a station. Signs include birds, porpoises, sea lions and predator fishes
attribute	visSignPresent	ioos_category	String	Other
variable	sonarRangeMeters		int
attribute	sonarRangeMeters	_FillValue	int	2147483647
attribute	sonarRangeMeters	actual_range	int	0, 0
attribute	sonarRangeMeters	description	String	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.
attribute	sonarRangeMeters	ioos_category	String	Other
attribute	sonarRangeMeters	units	String	m
variable	noOfSpec		int
attribute	noOfSpec	_FillValue	int	2147483647
attribute	noOfSpec	actual_range	int	1, 33
attribute	noOfSpec	description	String	Number of species caught, observed or detected at the station.
attribute	noOfSpec	ioos_category	String	Other
variable	code50_65		int
attribute	code50_65	_FillValue	int	2147483647
attribute	code50_65	actual_range	int	112, 720
attribute	code50_65	description	String	5 digit numeric codes used for 1950-1965 in the hard copy Data Reports.
attribute	code50_65	ioos_category	String	Other
variable	code66_89		int
attribute	code66_89	_FillValue	int	2147483647
attribute	code66_89	actual_range	int	380, 5140
attribute	code66_89	description	String	A 5 digit numeric codes used from 1966-1989 in the hard copy Data Reports.
attribute	code66_89	ioos_category	String	Other

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.