SharkAtSharp

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: SCDNR, Marine Resources Division, SEAMAP-SA program
Publication_Date: 20130101
Title:
SharkAtSharp
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Marine Spatial Data: This dataset came from the Southeast Area Monitoring and Assessment Program (SEAMAP) which has conducted shallow water trawl surveys of the South Atlantic Bight coastal zone since 1986. This dataset was based on a recent five year time frame (2006-2010). The data were summarized into 1 x 1 minute latitude/longitude grid cells (blocks), which provide the number of collections, percent occurrence, mean catch per unit effort (CPUE), and the coefficient of variance for the CPUE. General SEAMAP Overview: The SEAMAP - South Atlantic Coastal Survey, funded by the National Marine Fisheries Service (NMFS) and conducted by the South Carolina Department of Natural Resources - Marine Resources Division (SCDNR-MRD), began in 1986. This survey provides long-term, fishery-independent data on the distribution and relative abundance of resident and transient fishes, elasmobranchs, decapod and stomatopod crustaceans, sea turtles, horseshoe crabs, and cephalopods that are accessible by high-rise trawls. Twenty-three finfish species (Archosargus probatocephalus, Brevoortia smithi, Brevoortia tyrannus, Centropristis striata, Chaetodipterus faber, Cynoscion nebulosus, Cynoscion regalis, Leiostomus xanthurus, Menticirrhus americanus, M. littoralis, M. saxatilis, Micropogonias undulatus, Mycteroperca microlepis, Paralichthys albigutta, P. dentatus, P. lethostigma, Peprilus paru, P. triacanthus, Pogonias cromis, Pomatomus saltatrix, Sciaenops ocellata, Scomberomorus cavalla, S. maculatus), four decapod species (Callinectes sapidus, Farfantepenaeus aztecus, F. duorarum, and Litopenaeus setiferus), all marine turtles, all coastal shark species, and horseshoe crabs were selected as priority species by the SEAMAP-SA Committee. Additional data recorded for priority species include measurements of length or width for all priority species, sex and individual weights for blue crab, sharks, sea turtles, and horseshoe crabs, and reproductive information on commercially important penaeid shrimp and blue crabs. SEAMAP has the only existing long-term program in coastal waters (30 to 60 ft depth) waters off the Atlantic coast of the southeastern United States that monitors species composition, length frequency, abundance, and life history based on fishery-independent data. These data provide critical input for the assessments of stock status conducted by NOAA Fisheries, and greatly assist stock assessment scientists and the Council in the management of species of the South Atlantic Bight. From 2006 to 2010, the abundance and biomass of species off the coast of the southeastern United States (Cape Hatteras, NC to Cape Canaveral, FL) were collected using paired 75-ft (22.9-m) mongoose-type Falcon trawl nets without TED's during seasonal cruises (spring, summer fall). Sampling cruises were conducted in established strata between Cape Hatteras, North Carolina (35o 13.2'N) and Cape Canaveral, Florida (28o 30.0'N). Stations were randomly selected from a pool of stations within each stratum. The number of stations assigned to each of twenty four shallow water strata varied annually. Using optimal allocation, stations in each stratum were allocated from total number of stations sampled each season. A total of 102 stations were sampled in 2006-2008 (306 stations/year) and 112 stations sampled in 2009-2010 (336 total). Sampling was conducted during daylight hours.
Purpose:
This GIS data set was created for the purpose of describing the distribution and relative abundance of the numerically dominant and economically important coastal shallow water species in the southeastern coastal waters so that these biological resources can be considered for any planned energy development or other coastal use activities. General SEAMAP purpose: SEAMAP cruises provide long-term, fishery-independent data on the distribution and relative abundance of resident and transient fishes, elasmobranchs, decapod and stomatopod crustaceans, sea turtles, horseshoe crabs, and cephalopods that are accessible by high-rise trawls. The current SEAMAP objectives are: 1.) To monitor the distribution and abundance of coastal species in the South Atlantic Bight with emphasis on critical life stages of commercially or recreationally important Atlantic species including, but not limited to penaeid shrimps, king and Spanish mackerel, and several select sciaenid species for the purpose of compiling a long-term data base of biological, ecological and associated environmental parameters of coastal waters; 2.) Obtain reproductive data and monitor (grossly) for signs of disease for commercial shrimp species and blue crabs; 3.) Obtain length, sex, and individual mass data for coastal shark species; 4.) Tag marine turtles to contribute to knowledge of their abundance and movement patterns; 5.) Obtain age-growth and reproductive stage data on selected species (weakfish, Atlantic croaker, southern kingfish, Spanish mackerel, king mackerel, bluefish); 6.) Provide biological specimens to cooperating agencies and other investigators upon request; subject to federal and state permitting requirements, time, and space limitations.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 4/11/2006
Ending_Date: 11/12/2010
Currentness_Reference:
publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -81.474057
East_Bounding_Coordinate: -75.582223
North_Bounding_Coordinate: 35.354798
South_Bounding_Coordinate: 28.656171
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: High-rise trawl
Theme_Keyword: Fisheries
Theme_Keyword: Fishery-independent
Theme_Keyword: SCDNR
Theme_Keyword: SEAMAP
Theme_Keyword: Atlantic sharpnose shark
Theme_Keyword: Trawl survey
Theme_Keyword: South Atlantic Bight
Theme_Keyword: Rhizoprionodon terraenovae
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North Carolina
Place_Keyword: South Carolina
Place_Keyword: Florida
Place_Keyword: Georgia
Place_Keyword: Southeast
Access_Constraints: None
Use_Constraints:
Neither the State of South Carolina, the Department of Natural Resources, nor any of its employees, is responsible for any improper or incorrect use of the information described and/or contained herein, and assume no responsibility for the use of the information. The South Carolina Department of Natural Resources and SEAMAP should be acknowledged as the data source in products derived from these data. For information purposes, email to SEAMAP the full citation of any publication made (printed or electronic) that cites this data source or any constituent part. Acknowledge the use of specific records from contributing SEAMAP databases and recognize the limitations of data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR; MARMAP and SEAMAP-SA programs
Contact_Person: Dr. Marcel Reichert
Contact_Position: Coastal Finfish Section Manager
Contact_Address:
Address_Type: physical
Address:
217 Fort Johnson Rd.
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29412
Country: US
Contact_Voice_Telephone: 843-953-5778
Contact_Facsimile_Telephone: 843-953-9820
Contact_Electronic_Mail_Address: reichertm@dnr.sc.gov
Native_Data_Set_Environment:
Version 6.2 (Build 9200) ; Esri ArcGIS 10.1.0.3035
Back to Top
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
Sampling cruises are conducted seasonally: spring (April-May), summer (July-August), and fall (October-November) in established strata between Cape Hatteras, North Carolina (35o 13.2'N) and Cape Canaveral, Florida (28o 30.0'N). One hundred and twelve stations in a band delineated by 4.6 and 9.1 meter contours (previously the inner strata) are sampled each season. Stations are allocated to strata according to results of an Optimal Allocation Analysis. Sampling is conducted during daylight hours. Operations at each site include collections with paired 22.9 m mongoose-type Falcon trawls (designed and constructed by Beaufort Marine Supply) with tickler chains which are towed for 20 minutes bottom time from the R/V Lady Lisa, a 22.9 m St. Augustine shrimp trawler. Nets do not contain TED's or BRD's so that density estimates for all sizes of each species can be calculated, and to maintain comparability with previous survey data. Contents of each net are sorted separately to species, and total biomass and number of individuals are recorded for all species of finfish, elasmobranchs, decapod and stomatopod crustaceans, cephalopods, sea turtles, xiphosurans, and cannonball jellies. Only total biomass is recorded for all other miscellaneous invertebrates (excluding cannonball jellies) and algae, which are treated as two separate taxonomic groups. Marine turtles are released in good condition according to NMFS permitting guidelines. Where large numbers of individuals of a species occur in a collection, the entire catch is sorted and all individuals of that species are weighed, but only a randomly selected subsample are processed and total number is calculated. For large trawl catches, the contents of each net are weighed prior to sorting and a randomly chosen subsample of the total catch is then sorted and processed. In every collection, each of the priority species is weighed collectively and individuals are measured. For large collections of the priority species, a random subsample consisting of thirty to fifty individuals is weighed and measured. Depending on the species, measurements of finfish are recorded as total length or fork length, measured to the nearest centimeter. Additional data are collected on individual specimens of penaeid shrimp (total length in mm, sex, female ovarian development, male spermatophore development, occurrence of mated females), blue crabs (carapace width in mm, individual weight, sex, presence and developmental stage of eggs), sharks (total and fork lengths in cm, individual weight, sex), horseshoe crabs (prosoma width and length in mm, individual weight, sex), and sea turtles (curved and straight lengths and widths in cm, individual weight, PIT and flipper tag numbers). The start latitude and longitude of each trawl was used to assign it to a 1' x 1' SEAMAP grid cell (block). Mean CPUE and CV were then computed from all samples in a grid cell and the data values were reassigned to the mid-point of the grid cell with respect to latitude and longitude as described in the attributes section.
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR, SEAMAP
Contact_Person: Marcel Reichert
Contact_Position: Coastal Finfish Section Manager
Contact_Address:
Address_Type: physical
Address:
217 Fort Johnson Rd.
City: Charleston
State_or_Province: SC
Postal_Code: 29412
Country: US
Contact_Voice_Telephone: 843-953-5778
Contact_Electronic_Mail_Address: reichertm@dnr.sc.gov
Process_Step:
Process_Description:
GIS: Process description: GIS processing: 1.) One point layer per species was created where each point was the mid-point of a 1 x 1 minute grid cell where there was SEAMAP trawl data collected between 2006 and 2010. A 1 x 1 min. grid of the whole offshore study area was created. 3.) A spatial selection was performed to select those 1 x 1 min. grid cells that contained the SEAMAP trawl data that was assigned to the grid cell mid-points. A new layer was created with just the selected grid cells. 4.) The mid-points from the species layer were spatially joined to the 1 x 1 min. grid layer to create a final gridded layer with one value/grid (e.g. MeanCPUE). For the join, the point layer was joined to the grid polygon layer. 5.) Deleted unnecessary attribute columns. 6.) Exported the joined layer to the final geodatabase.
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR, MRRI
Contact_Person: Jessica Boynton
Contact_Position: GIS Manager I
Contact_Address:
Address_Type: physical
Address:
217 Fort Johnson Rd.
City: Charleston
State_or_Province: SC
Postal_Code: 29412
Country: US
Contact_Voice_Telephone: 843-953-9163
Contact_Facsimile_Telephone: 843-953-9820
Contact_Electronic_Mail_Address: boyntonj@dnr.sc.gov
Process_Step:
Process_Description:
Dataset moved.
Source_Used_Citation_Abbreviation:
\\Mrdnas\GIS\Boynton\GISProjects\2011\Other\Research\SCWindProject\Metadata\MetadataTemplate
Process_Date: 20110615
Process_Time: 102721
Back to Top
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 291
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Transverse Mercator
Transverse_Mercator:
Transverse Mercator
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -81.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001
Planar_Distance_Units:
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Back to Top
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: SharkAtSharp
Attribute:
Attribute_Label: OBJECTID_1
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: N_Coll
Attribute_Definition:
The total number of traps set within a 1 x 1 minute grid
Attribute:
Attribute_Label: Pct_Occ
Attribute_Definition:
Pct_Occ: The percent occurrence of a species in traps within a 1 x 1 minute grid was determined by calculating the number of nets deployed with a positive occurrence divided by the total number of nets deployed and converted to a percentage by multiplying by 100.
Attribute:
Attribute_Label: MeanCPUE
Attribute_Definition:
Mean catch per unit effort within a 1 x 1 minute grid was determined by calculating the number of fish of a specific species caught per net, divided by the total number of nets deployed.
Attribute:
Attribute_Label: CV_CPUE
Attribute_Definition:
Coefficient of variance for the catch per unit effort was determined by dividing the standard deviation of the catch per unit effort by the total catch per unit effort.
Attribute:
Attribute_Label: Mid_Lat
Attribute_Definition:
This is the latitude for the center point for each 1 x 1 min grid.
Attribute:
Attribute_Label: Mid_Lon
Attribute:
Attribute_Label: BLOCK
Attribute_Definition:
The BLOCK number is the lat and long (lat degree lat min long degree long min) for the lower right corner of each 1 x 1 min grid.
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition:
Length of feature in internal units.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition:
Area of feature in internal units squared.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: South Carolina Department of Natural Resources
Contact_Position: Spatial Data Manager
Contact_Address:
Address_Type: physical
Address:
1000 Assembly St.
City: Columbia
State_or_Province: SC
Postal_Code: 29201
Country: US
Contact_Voice_Telephone: 803-734-9100
Contact_Facsimile_Telephone: 803-734-7001
Contact_Electronic_Mail_Address: gisman@dnr.sc.gov
Distribution_Liability:
See access and use constraints information.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: File Geodatabase Feature Class
Digital_Transfer_Option:
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20130218
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR, Marine Resources Division, MRRI
Contact_Person: Jessica Boynton
Contact_Position: GIS Manager I
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 12559
City: Charleston
State_or_Province: SC
Postal_Code: 29422
Country: US
Contact_Voice_Telephone: 843-953-9163
Contact_Facsimile_Telephone: 843-953-9820
Contact_Electronic_Mail_Address: boyntonj@dnr.sc.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Back to Top