gov.noaa.nmfs.inport:24912 eng UTF8 gov.noaa.nmfs.inport:67308 dataset CSV Files Southeast Fisheries Science Center (305)361-5761 75 Virginia Beach Drive Miami FL 33149 USA www.sefsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 8:00 a.m. - 4:30 p.m. EST resourceProvider Carlson, John 850-234-6541 x221 850-235-3559 3500 Delwood Beach Road Panama City FL 32408 John.Carlson@noaa.gov pointOfContact 2026-03-04T19:17:20 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Diet of bonnethead shark in eastern Gulf of Mexico Stomach contents of bonnethead sharks in eastern Gulf of Mexico 2017 publication NOAA/NMFS/EDM 24912 https://www.fisheries.noaa.gov/inport/item/24912 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information tableDigital To examine variation in diet and daily ration of the bonnethead, Sphyrna tiburo (Linnaeus, 1758), sharks were collected from three areas in the eastern Gulf of Mexico: northwest Florida (29o40N, 85o13W), Anclote Key near Tampa Bay (28o10N, 82o42.5W), and Florida Bay (24o50N, 80o48W) from March through September, 1998-2000. In each area, diet was assessed by life stage (young-of-the year, juveniles, and adults) and quantified using five indices: percent by number (N), percent by weight (W), frequency of occurrence (O), index of relative importance expressed on a percent basis (IRI), and IRI based on diet category (IRIDC). Diet could not be assessed for young-of-the-year in Tampa Bay or Florida Bay owing to low sample size. Diet analysis showed an ontogenetic shift in northwest Florida. Young-of-the-year stomachs from northwest Florida (n68, 1 empty) contained a mix of seagrass and crustaceans while juvenile stomachs (n82, 0 empty) contained a mix of crabs and seagrass and adult stomachs (n39, 1 empty) contained almost exclusively crabs. Crabs made up the majority of both juvenile and adult diet in Tampa Bay (n79, 2 empty, and n88, 1 empty, respectively). Juvenile stomachs from Florida Bay (n72, 0 empty) contained seagrass and a mix of crustaceans while adult stomachs contained more shrimp and cephalopods (n82, 3 empty). Diets in northwest Florida and Tampa Bay were similar. The diet in Florida Bay was different from those in the other two areas, consisting of fewer crabs and more cephalopods and lobsters. Plant material was found in large quantities in all stomachs examined from all locations (15 IRIDC in 6 of the 7 life stage-area combinations, 30 IRIDC in 4 of the 7 combinations, and 62 IRIDC in young-of-the-year diet in northwest Florida). Using species- and area-specific inputs, a bioenergetic model was constructed to estimate daily ration. Models were constructed under two scenarios: assuming plant material was and was not part of the diet. Overall, daily ration was significantly different by sex, life stage, and region. The bioenergetic model predicted increasing daily ration with decreasing latitude and decreasing daily ration with ontogeny regardless of the inclusion or exclusion of plant material. These results provide evidence that bonnetheads continuously exposed to warmer temperatures have elevated metabolism and require additional energy consumption to maintain growth and reproduction. To (1) describe and quantify the diet and feeding ecology of bonnetheads by life stage and area (following Lombardi-Carlson et al. 2003), and (2) model consumption using a bioenergetic approach for life stages and sexes from each area, examining the sensitivity of the model to input parameters. completed Carlson, John 850-234-6541 x221 850-235-3559 3500 Delwood Beach Road Panama City FL 32408 John.Carlson@noaa.gov custodian notPlanned EARTH SCIENCE > BIOLOGICAL CLASSIFICATION EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE theme Global Change Master Directory (GCMD) Science Keywords 17.0 0163192 163192 theme NCEI ACCESSION NUMBER US DOC; NOAA; NMFS; Southeast Fisheries Science Center; Panama City, FL Laboratory theme NODC COLLECTING INSTITUTION NAMES ANIMALS - INDIVIDUAL - Stomach Contents BIOLOGICAL DATA STOMACH CONTENTS STOMACH CONTENTS - CONTENT WEIGHT STOMACH CONTENTS - PREY COUNT STOMACH CONTENTS - PREY TAXONOMY WATER TEMPERATURE water depth theme NODC DATA TYPES biological laboratory analyses theme NODC OBSERVATION TYPES US DOC; NOAA; NMFS; Southeast Fisheries Science Center theme NODC SUBMITTING INSTITUTION NAMES oceanography theme WMO_CategoryCode Coastal Waters of Florida Gulf of Mexico North Atlantic Ocean place NODC SEA AREA NAMES YSI - handheld multi-parameter instrumentYSI - handheld multi-parameter instrument scale instrument NODC INSTRUMENT TYPES bonnethead diet fishery-dependent young-of-the-year theme 1998-2005 temporal Anclote Key Florida Bay Gulf of Mexico Tampa Bay place depth sounder measuring board ruler instrument DOC/NOAA/NMFS/SEFSC > Southeast Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian A Comparison of the foraging ecology and bioenergetics of the early life-stages of two sympatric hammerhead sharks from 1998-07-12 to 2005-07-27 (NCEI Accession 0163192) project InPort otherRestrictions Cite As: Southeast Fisheries Science Center, [Date of Access]: Diet of bonnethead shark in eastern Gulf of Mexico [Data Date Range], https://www.fisheries.noaa.gov/inport/item/24912. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: Not for use in litigation. unclassified No security classification system is applicable This document is available to all government employees and the public. Diet of scalloped hammerhead shark in eastern Gulf of Mexico NOAA/NMFS/EDM 24913 largerWorkCitation NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 24912 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/sefsc/dmp/pdf/24912.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US oceans -85.292 -82.063 25.056 29.978 Localized Sampling Area | Currentness: Ground Condition 2001 2002 Please note that the data provided to the archive consists of two data tables joined together. The "Header" table information can be recreated by just taking the columns from this one before the second shark number column, and then eliminating all blank records. To Get just the stomach contents information chop of all columns before this in the table. false eng false Data Table location_areas.csv 2022-05-31 publication bthd_diet.csv 2022-05-31 publication dataset Data was entered by hand into the database and saved on a local computer. otherRestrictions otherRestrictions Access Constraints: No access constraints are applicable. | Use Constraints: Please cite as appropriate