LBLL_Snowy

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: MARMAP, SCDNR
Title:
LBLL_Snowy
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Marine Spatial Data: This dataset came from the Marine Resources Monitoring, Assessment and Prediction (MARMAP) program which has conducted fisheries-independent research for the last 40 years off the southeastern United States. This dataset was based on a five year time frame (2006-2010). The data were summarized into 1 x 1 minute latitude/longitude grids which provide the number of collections, percent occurrence, mean catch per unit effort (CPUE), and the coefficient of variance for the CPUE. General MARMAP overview: Annual MARMAP cruises to assess relative abundance of reef fishes in the sponge-coral and shelf edge (live bottom) habitats of the South Atlantic Bight (SAB) have been conducted since 1978. MARMAP currently samples natural live bottom habitat from Cape Lookout, NC to the Ft. Pierce area, FL. The current main MARMAP objectives are to: 1.) sample reef fishes in the snapper-grouper complex at using a variety of gears in live bottom, rocky outcrop, high relief, and mud bottom habitats, 2.) collect detailed data for time series description of species for annual composition and relative abundance, 3.) obtain population characteristics on fish species of interest through life history information analysis, including age and growth, sex ratio, size and age of sexual maturation and transition, spawning season, fecundity, and diet. Priorities are dictated by the SEDAR schedule and other management considerations, 4.) collect hydrographic data (e.g. depth, temperature, salinity, etc.) for comparison to fish abundance and composition indices, and 5.) collect DNA samples from selected fish species for stock identification. For forty years, the Marine Resources Research Institute (MRRI) at the South Carolina Department of Natural Resources (SCDNR), through the Marine Resources Monitoring, Assessment and Prediction (MARMAP) program, has conducted fisheries-independent research on groundfish, reef fish, ichthyoplankton, and coastal pelagic fishes within the region between Cape Lookout, North Carolina, and Ft Pierce, Florida. The overall mission of the program has been to determine distribution, relative abundance, and critical habitat of economically and ecologically important fishes of the South Atlantic Bight (SAB), and to relate these features to environmental factors and exploitation activities. Research toward fulfilling these goals has included trawl surveys (from 6-350 m depth); ichthyoplankton surveys; location and mapping of reef habitat; sampling of reefs throughout the SAB; life history and population studies of priority species; tagging studies of commercially important species and special studies directed at specific management problems in the region. Survey work has also provided a monitoring program that has allowed the standardized sampling of fish populations over time and development of an historical base for future comparisons of long-term trends. MARMAP has developed a long-term database for reef fish that has proven valuable in interpreting fisheries landings data and developing regulations for protecting reef fish resources. Restrictions on minimum sizes of most commercially important species make it difficult to monitor life history parameters and abundance data from samples collected from the fishery landings. MARMAP has been the only existing long-term program off the Atlantic coast of the southeastern United States that monitors reef fish 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 snapper/grouper complex of the South Atlantic Bight. The abundance and biomass of fish species collected during the day from 2006 to 2010 off the coast of the southeastern United States (Cape Fear, NC to Cape Canaveral, FL) were collected using long bottom long lines. Long bottom long lines were set on the ?tilefish grounds?, generally smooth mud or clay bottoms. Long bottom long lines were constructed of 3.2 mm galvanized cable (1,525 m long), deployed from along-line reel with 1,220 m of cable used as ground line and the remaining 305 m buoyed to the surface. A 10-11 kg weight was attached to the ground line, dropped into the water, and 100 gangions (comprised of an AKsnap, approximately 0.5 m of 90 kg monofilament and a tuna circle hook) were subsequently attached at 12 m intervals to the ground line. Another 10-11 kg weight was then attached at the terminal end of the ground line (buoy end) and the remaining 305 m of cable was buoyed to the surface with 1 or 2 polyball buoys attached to a10 m trailer line. Each set was soaked between 45 and 150 minutes. Sampling was conducted between 31° 14.1' N and 32° 9.2' N and -78° 59.8' W and -79° 44.1' W at depths between 176 and 261 m.
Purpose:
This dataset was created for the purpose of describing the distribution and relative abundance of the numerically dominant and economically important deep-water finfish species in southeastern coastal waters so that these biological resources can be considered for any planned energy development or other coastal use activities.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060101
Ending_Date: 20100101
Currentness_Reference:
Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -79.750220
East_Bounding_Coordinate: -78.399520
North_Bounding_Coordinate: 32.570501
South_Bounding_Coordinate: 31.213855
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Epinephelus niveatus
Theme_Keyword: Fishery-independent
Theme_Keyword: Snapper-grouper complex
Theme_Keyword: Long bottom long line
Theme_Keyword: Snowy grouper
Theme_Keyword: Fisheries
Theme_Keyword: SCDNR
Theme_Keyword: MARMAP
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: South Atlantic Bight
Place_Keyword: Southeast
Place_Keyword: South Carolina
Access_Constraints: None
Use_Constraints:
1.) The use of the summary data provided in this database for any analysis or report must acknowledge the MARMAP program as the original data source. For information purposes, email 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 MARMAP databases and recognize the limitations of data. 2.) 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 should be acknowledged as the data source in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR
Contact_Person: Dr. Marcel Reichert
Contact_Position: Associate Scientist; 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_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
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Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
Field Data Collection: From 1996 to present, the long bottom long lines were constructed of 3.2-mm galvanized cable (1525 m long), deployed from a long line reel with 1220 m of cable used as ground line and the remaining 305 m buoyed to the surface. The ground line consisted of an 10 kg weight attached to the terminal end, 100 gangions (comprising of an AK snap, approximately 0.5 m of 90 kg monofilament and a tuna circle hook at 12-m intervals) attached to the ground line, and another weight at the ground line?s buoy end and the remaining 305 m of cable was buoyed to the surface with 1 or 2 polyball buoys attached to a10 m trailer line. From 1982 through 1987 hook sizes were either #5, #7 or #9; after 1996 the hook sizes were either #5 or #7. Hooks were baited (double hooked) with whole squid (Illex sp. or Loligo sp.). Bottom long lines were deployed by adding an 11 kg weight to the terminal end, dropping the weight into the water, and then attaching 100 gangions with a spacing of 12 m between gangions as the ground line came off the reel. After all gangions were attached, an 11 kg weight was attached to the ground line and the remaining 305 m of cable was buoyed to the surface with 1 or 2 polyball buoys and a Hi-Flyer buoy attached to a 10 m trailer line. Long bottom long lines were deployed while running with the current at a speed of 4-5 knots in areas of smooth bottom with mud substrate (e.g. tilefish grounds). Each line soaked between 45 and 90 minutes and was retrieved using a hydraulic pot hauler. Sampling was between 31° 14.1' N and 32° 9.2' N and -78° 59.8' W and -79° 44.1' W at depths between 176 and 261 m. All individuals in each catch are sorted and identified to species level. All individuals of each species are weighed together, while length is individually measured for all fish. All Individuals of selected species are kept for life history work-up. All other fish are returned to the ocean. For any given species, a catch per unit effort (CPUE) is calculated for any 1 x 1 minute grid cell that was sampled by the MARMAP program within the 5 year time frame (2006-2010). All catches used in the calculations were from long lines that were soaked between 45 and 150 minutes. CPUE was calculated as the number of a selected species caught per 100 hooks per hour of soak time. The number of sets, the percent occurrence (the number of positive sets divided by the number of available sets, and coefficient of variance for CPUE was calculated for each 1 x 1 minute grid cell.
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: MARMAP, SCDNR
Contact_Person: Dr. Marcel Reichert
Contact_Position: Associate Scientist, Coastal Finfish Section Manager
Contact_Address:
Address_Type: mailing
Address:
217 Fort Johnson Rd.
City: Charleston
State_or_Province: SC
Postal_Code: 29412
Country: US
Contact_Voice_Telephone: 843-953-6778
Contact_Facsimile_Telephone: 843-953-9820
Contact_Electronic_Mail_Address: reichertm@dnr.sc.gov
Process_Step:
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 MARMAP sampling between 2006-2010. 2.) 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 MARMAP 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 grid layer per species.
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR
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
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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: 48
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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
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: LBLL_Snowy
Attribute:
Attribute_Label: OBJECTID
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 sets within a 1x1 minute grid cell.
Attribute:
Attribute_Label: Pct_Occ
Attribute_Definition:
The percent occurrence of a species in a set within a 1 x 1 minute grid cell was determined by calculating the number of sets with a positive occurrence divided by the total number of sets 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 cell was determined by calculating the number of fish of a specific species caught per set hour, divided by the total number of sets deployed.
Attribute:
Attribute_Label: CV_CPUE
Attribute_Definition_Source:
Coefficient of variance for the mean catch per unit effort (MeanCPUE) was determined by dividing the standard deviation of the mean 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 cell.
Attribute:
Attribute_Label: Mid_Lon
Attribute_Definition:
This is the longitude for the center point for each 1 x 1 min. grid cell.
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 cell.
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.
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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: mailing
Address:
Rembert C. Dennis Building P.O. Box 167
City: Columbia
State_or_Province: SC
Postal_Code: 29202
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:
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Metadata_Reference_Information:
Metadata_Date: 20130218
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: SCDNR
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
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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