39218 Tortugas_2011 Data Set Published / External 37291 Tortugas_2011 Project Completed 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 2011 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. 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. 230 Theme ISO 19115 Topic Category environment Theme ISO 19115 Topic Category oceans Spatial Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA Theme NOS Data Explorer Topic Category Environmental Monitoring Theme 120kHz Theme Coral Theme ES60 Theme Fish Survey Theme Fisheries Acoustics Theme Hydrographic Acoustics Theme NOAA Theme Reef Theme Simard Theme Splitbeam Sonar Spatial Dry Tortugas Spatial Florida Keys Spatial Florida Keys National Marine Sancturay Spatial Gulf of Mexico Spatial Riley's Hump National Centers for Coastal Ocean Science Silver Spring MD Data Set As Needed 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. 41214 2011_Tortugas_Merged Published / External Completed Fish Distribution in the Dry Tortugas and Riley's Hump in 2011. Fish are divided into 100 meter squared resolution and grouped into Small Fish(<11cm), Medium Fish(between 11cm to 29cm), and Large Fish(>29cm). | Description Source: NOAA/NOS/NCCOS/CCRHR/AERR Branch Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script. 1 FID NUMBER No No Active Unique Feature Identifier | Description Source: ERSI 0 - 7568 2 Shape Unknown No No Active Geometric Shape | Description Source: ERSI Type of Shapefile in ArcGIS 3 IntNum NUMBER No No Active 100 meter square sections from survey area | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 1 - 1358 4 Latitude NUMBER No No Active The angular distance north or south of the earth's equator, measured in degrees. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 24.462463 - 24.641489 5 Longitude NUMBER No No Active The angular distance East or West from the Prime Meridian, measured in deqrees. | Description Source: Center for Coastal Fisheries and Habitat Research(CCFHR) -83.022490 - -82.155202 6 Sm_Fish NUMBER No No Active Average Size of Small Fish <11cm in a given IntNum. A zero(0) in this column repersents no fish in sample area. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) centimeter 0 - 10.998927 7 Sm_Density NUMBER No No Active Density of Small Fish(<11cm) in a given IntNum | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) Fish/100m2 0 - 9.699747 8 Md_Fish NUMBER No No Active Average Size of Medium Fish between 11cm and 29cm in a given IntNum. A zero(0) in this column repersents no fish in sample area. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) centimeter 0 - 28.970159 9 Md_Density NUMBER No No Active Density of Medium Size Fish between 11cm and 29cm in a given IntNum | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) Fish/100m2 0 - 20.252131 10 Lg_Fish NUMBER No No Active Average Size of Large Fish >29cm in a given IntNum. A zero(0) in this column repersents no fish in the sample area. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) centimeter 0 - 331.48804 11 Lg_Density NUMBER No No Active Density of Large Fish >29cm in a given IntNum | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) Fish/100m2 0 - 7.351289 12 Density NUMBER No No Active Density of all Fish in a given IntNum | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) Fish/100m2 0 - 24.988207 13 Dist_above NUMBER No No Active Mean distance off the seafloor for fish in the IntNum | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) Meter 0 - 27.408423 14 DateLocal NUMBER No No Active Average Date of the data during collection for a given IntNum. EST | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 2011-07-31 - 2011-08-03 15 TimeLocal NUMBER No No Active Average Eastern Standard Time of the data during collection for a given IntNum. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 00:00:24 - 23:59:57 16 DateGMT NUMBER No No Active Average Date of the data during collection for a given IntNum. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 2011-07-31 - 2011-08-03 17 TimeGMT NUMBER No No Active Average Greenwich mean time of the data during collection for a given IntNum. | Description Source: Center for Coastal Fisheries and Habitat Research (CCFHR) 00:00:12 - 23:59:49 Data Steward 2016-03-23 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Distributor 2016-03-23 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Metadata Contact 2016-03-23 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Point of Contact 2016-03-23 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Principal Investigator 2016-03-23 Person Taylor, Chris chris.taylor@noaa.gov Ground Condition -83.155202 -82.02249 24.641489 24.462463 Range 2011-07-31 2011-08-03 Yes Unclassified Please cite any use of this data. Not for Navigation https://coastalscience.noaa.gov/ Online Resource https://www.ccfhr.noaa.gov/ Online Resource 2016-03-23 Date that the source FGDC record was last modified. 2017-04-05 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. 2017-09-13 Partial upload of Spatial Info section only. ESRI ArcGIS 10.1 These data consist of fish densitys in the Dry Tortugas Florida Keys National Marine Sanctuary. The data was collected during corresponding multibeam operations. Not applicable 1 Acoustic data was collected aboard the NOAA Ship Nancy Foster using ES120-7C splitbeam transducer. The Kongsberg ES120-7C is a hull mounted transducer and the dataset was collected with a corresponding Kongsberg ES general purpose transceiver(GPT) and Simard EK60 software was used in the data acquisition. Data was collected during all shifts of multibeam survey. 2012-01-01T00:00:00 2 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. 2011-01-01T00:00:00 3 Fisheries Acoustic Processing Program Version 5.1 and R Scripting were used to calculate the density and size of fish through out the water column. Divided fish into 100 meter square area and size classes. Projection set to WGS84. 2011-01-01T00:00:00 41214 Entity gov.noaa.nmfs.inport:39218 Tyler Christensen 2017-04-05T12:51:16 SysAdmin InPortAdmin 2025-05-15T19:16:11 2017-09-13 National Centers for Coastal Ocean Science NCCOS 1002 Public No No 2017-09-13 1 Year 2018-09-13