NOAA Point Shapefile - 100m2 Fish Density for Dry Tortugas, United States, Project NF-08-06-SACS, 2008, WGS84
National Centers for Coastal Ocean Science
Data Set
(DS)
| ID: 38751
| Published / External
Created: 2017-04-05
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Last Modified: 2023-05-30
Project (PRJ) | ID: 37289
ID: 38751
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | NOAA Point Shapefile - 100m2 Fish Density for Dry Tortugas, United States, Project NF-08-06-SACS, 2008, WGS84 |
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Short Name | Fish_Acoustics |
* Status | Completed |
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* » Abstract |
The research mission was conducted in the Dry Tortugas, FL by National Ocean Service scientists from the Center for Coastal Habitat and Fisheries Research (CCFHR) during 2008 aboard the NOAA Ship Nancy Foster. The overall objective of CCFHR's research in the Tortugas is to examine the effects of implementation of the Tortugas North Ecological Reserve (TNER). The establishment of the TNER, a no-take reserve, in 2001 provided the opportunity to examine the response of the fish and benthic communities to the creation of a refuge for exploited reef fishes. Historically, exploitation of reef fishes in the Tortugas has focused on large predatory reef fishes, primarily snappers and groupers and, to a lesser extent, grunts. Trends in populations of these targeted species are expected to vary relative to geographic variation in fishing mortality (F). Increasing trends in targeted species abundance are expected in the TNER where all fishing was prohibited in 2001. Within adjacent areas managed as the Exclusive Economic Zone (EEZ), where both federally sanctioned commercial and recreational fisheries are permitted, exploited populations are expected to be depressed relative to those in the TNER. Within the Dry Tortugas National Park (DTNP) where fishing effort is limited to recreational hook and line fishing, trends in exploited species are expected to be intermediate to those observed in the TNER and EEZ. Cascading effects due to change in abundance of exploited species is expected to indirectly impact corals and other sessile benthic communities. Sampling to detect reserve implementation effects was conducted at the ecotone between the reef habitat of the banks and the surrounding soft-bottom shelf where the structure and composition of communities should provide sensitive indicators of a reserve effect. Energy flow across reef-sand boundaries is critical to reef communities. Energy and nutrients are imported to the reef by nocturnally foraging reef fish that feed in sand, algae, and seagrass flats adjacent to the reef. The majority of the TNER (approximately 70%) consists of soft-bottom shelf habitat, and previous work on the west Florida shelf suggests that benthic primary production is the major energy source supporting fish biomass. In addition to providing ecologically sensitive sampling locations, the interface between bank and shelf provided a distinct landscape feature suited to a comparative analysis of management impact. Observations were made using 1) a stratified-random survey design for scuba divers visual observations, 2) a systematic survey of fish and fauna using scientific splitbeam echosounders (fisheries sonar) to map fish densities and biomass on the shelf, coral and softbottom habitats. |
* Purpose |
1. To design and implement a mobile fisheries sonar survey in concert with multibeam echosounder hydrographic surveys to assess and map fish densities and biomass within and outside management zones. 2. To assess distribution of fish densities relative to management and ecological reserve boundaries and other differences that may be associated with management zones and habitat types, particularly as fish distributions relate to movements between habitat types. 3. To assess the extent of fish density distributions in comparison with diver visual surveys and fish community assessments. |
Notes |
228 |
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Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category | environment |
ISO 19115 Topic Category | oceans |
None | 120kHz |
None | Coral |
None | ES60 |
None | Fish Survey |
None | Fisheries Acoustics |
None | Hydrographic Acoustics |
None | NOAA |
None | Reef |
None | Simard |
None | Splitbeam Sonar |
Temporal Keywords
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* Spatial Keywords
Thesaurus | Keyword |
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None | Dry Tortugas |
None | Florida Keys |
None | Florida Keys National Marine Sancturay |
None | Gulf of Mexico |
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Physical Location
• » Organization | National Centers for Coastal Ocean Science |
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• » City | Silver Spring |
• » State/Province | MD |
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Data Set Information
* Data Set Scope Code | Data Set |
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• Maintenance Frequency | As Needed |
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Distribution Liability |
These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2011-12-05 |
Date Effective To | |
Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Distributor |
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* » Date Effective From | 2011-12-05 |
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Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Metadata Contact |
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* » Date Effective From | 2011-12-05 |
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Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Point of Contact |
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* » Date Effective From | 2011-12-05 |
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Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Principal Investigator |
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* » Date Effective From | 2011-12-05 |
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Person | Taylor, Chris |
Email Address | chris.taylor@noaa.gov |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
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Extent Group 1 / Geographic Area 1
* » W° Bound | -83.113441 |
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* » E° Bound | -82.92173 |
* » N° Bound | 24.880377 |
* » S° Bound | 24.583962 |
* » Description |
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* » Time Frame Type | Range |
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* » Start | 2008-07-25 |
End | 2008-08-04 |
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Vector Representation Used? | Yes |
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Access Information
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* » Security Class | Unclassified |
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» Data Access Procedure |
Contact Chris Taylor @ chris.taylor@noaa.gov; |
• » Data Access Constraints |
Please cite any use of this data. |
• Data Use Constraints |
Not for Navigation |
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URLs
URL | http://www.ccfhr.noaa.gov/ |
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Activity Log
Activity Time | 2011-12-05 |
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Date that the source FGDC record was last modified. |
Activity Time | 2017-04-05 |
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Description |
Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Time | 2017-09-13 |
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Partial upload of Spatial Info section only. |
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Technical Environment
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ESRI ArcGIS 9.3 |
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These data consist of fish densitys in the Dry Tortugas Florida Keys National Marine Sanctuary. The data was collected during corresponding multibeam operations. |
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Not applicable |
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» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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Process Steps
Process Step Number | 1 |
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» Description |
Acoustic data was collected aboard the NOAA Ship Nancy Foster using ES120-7C splitbeam transducer. The Kongsberg ES120-7C tansducer was deployed using a moon pool. Kongsberg ES transceiver and Simard ES60 software was used in the data acquisition. Data was collected during all shifts of multibeam survey. |
Process Date/Time | 2008-01-01 00:00:00 |
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Process Step Number | 2 |
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» Description |
Echoview 4 was used in this step of the data processing. The .raw file formate was edited for erroneous ping returns and acoustic noise. Fish were track using a tracking algorithm and the fish tracks were export in a .csv formate. |
Process Date/Time | 2010-01-01 00:00:00 |
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Process Step Number | 3 |
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» Description |
Microsoft Office Excel 2007 was used to calculate the density and size of fish through out the water column. Divided fish into 100 meter square area and created a new workbook with the calculated fish sizes and densities. |
Process Date/Time | 2010-01-01 00:00:00 |
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Process Step Number | 4 |
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» Description |
Arc Catalog was used to convert the .xlsx file formate to shapefiles. Set the geographic coordinate system to WGS 84. Then merged the all the .shp file into one .shp file with all the trip data. |
Process Date/Time | 2010-01-01 00:00:00 |
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Related Items
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Catalog Details
Catalog Item ID | 38751 |
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Metadata Record Created By | Tyler Christensen |
Metadata Record Created | 2017-04-05 12:48+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-05-30 18:09+0000 |
Metadata Record Published | 2017-09-13 |
Owner Org | NCCOS |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2017-09-13 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2018-09-13 |
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