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Mangrove Terrapin Mark Recapture Study data

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Frequently-anticipated questions:

What does this data set describe?

Title: Mangrove Terrapin Mark Recapture Study data
In 2001 a mark-recapture study on mangrove terrapins (Malaclemys terrapin) in the Big Sable Creek (BSC) complex within Everglades National Park was initiated. The summary data for terrapins in BSC were collected over 5 sampling trips in a two-year period (November 2001 - October 2003) and from analysis of individual terrapin capture histories.
  1. How should this data set be cited?

    Hart, Kristen, 2007, Mangrove Terrapin Mark Recapture Study data.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.16
    East_Bounding_Coordinate: -81.14
    North_Bounding_Coordinate: 25.28
    South_Bounding_Coordinate: 25.26
    Description_of_Geographic_Extent: Big Sable Creek complex

  3. What does it look like?

    <https://sofia.usgs.gov/publications/posters/terrapin_pop/images/collmapx.jpg> (JPEG)
    map of collection sites for M. terrapin genetic analysis
    <https://sofia.usgs.gov/publications/posters/terrapin_pop/images/locmapnx.jpg> (JPEG)
    map showing location of study site in Everglades National Park on the Cape Sable Peninsula

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: Nov-2001
    Ending_Date: Oct-2003
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: spreadsheet

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: SW Florida coast

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

    Data available in an Excel spreadsheet include: turtle id #; capture date; gender; sch (cm) straight carapace height; scl (cm) straight carapace length; scw (cm) straight carapace width; mass (g); ccl (cm) curved carapace length; ccw (cm) curved carapace width; spl (cm) straight plastron length; and spw (cm) straight plastron width. An * denotes carapace anomoly.
    Entity_and_Attribute_Detail_Citation: USGS personnel

  8. What biological taxa does this data set concern?

    Taxonomic_Keyword_Thesaurus: none
    Taxonomic_Keywords: animals
    U.S. Department of Agriculture - Agricultural Research Service (ARS)

    U.S. Department of Agriculture - Natural Resources Conservation Service (NRCS) Department of the Interior - U.S. Geological Survey Department of Commerce - National Oceanic and Atmospheric Administration (NOAA) Environmental Protection Agency (EPA) Smithsonian Institution - National Museum of Natural History (NMNH)

    Publication_Date: 2000
    Title: Integrated Taxonomic Information System (ITIS)
    Geospatial_Data_Presentation_Form: Database
    Retrieved from the Integrated Taxonomic Information System on-line database, <http://www.itis.gov>.
    Online_Linkage: <http://www.itis.gov>
    We worked throughout navigable, mangrove-lined tidal creeks within the BSC complex and conducted all sampling trips around new moons to take advantage of spring tides (i.e., highest high and lowest low tides). Dip netting was most successful during a 2-hour window around both day and evening low tides.
    Taxonomic_Completeness: unknown
    General_Taxonomic_Coverage: Diamondback terrapins are identified to the subspecies level
    Taxon_Rank_Name: Empire
    Taxon_Rank_Value: Biovitae
    Taxon_Rank_Name: Kingdom
    Taxon_Rank_Value: Animalia
    Taxon_Rank_Name: Phylum
    Taxon_Rank_Value: Chordata
    Taxon_Rank_Name: Subphylum
    Taxon_Rank_Value: Vertebrata
    Taxon_Rank_Name: Class
    Taxon_Rank_Value: Reptilia
    Taxon_Rank_Name: Order
    Taxon_Rank_Value: Testudines
    Taxon_Rank_Name: Family
    Taxon_Rank_Value: Emydidae
    Taxon_Rank_Name: Genus
    Taxon_Rank_Value: Malaclemys
    Applicable_Common_Name: Diamondback Terrapins
    Taxon_Rank_Name: Species
    Taxon_Rank_Value: Malackemys terrapin
    Applicable_Common_Name: Diamondback Terrapin
    Taxon_Rank_Name: Subspecies
    Taxon_Rank_Value: Malaclemys terrapin rhizophorarum
    Applicable_Common_Name: Mangrove Diamondback Terrapin

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • Kristen Hart

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Kristen Hart
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, FL 33701

    727 803-8747 ext 3035 (voice)
    727 803-2032 (FAX)

Why was the data set created?

Study objectives were to estimate adult survival probablility, capture probablilty, and abundance of terrapins at this study site. This allowed the establishment of the first baseline assessment for mangrove terrapins in the coastal Everglades.

How was the data set created?

  1. What methods were used to collect the data?

    Method 0 of 3
    Type: Field

    Mark-recapture techniques were used for Diamondback terrapins. Three weeklong sampling trips were made to the Big Sable Creek system to capture, mark, and recapture terrapins. Captures were concentrated in the upper reaches of creeks in the system. On each sampling trip, named creeks and their navigable branches were surveyed systematically for terrapins at AM and PM low tides. Dip nets were used to capture turtles, with the new moon tides providing the best conditions for capture success.

    Method 0 of 3
    Type: Field

    In addition to taking standard morphometric measurements on each turtle and recording a GPS location for each capture and recapture location, we marked each newly captured terrapin in four ways: (1) by notching the marginal scutes in a systematic pattern, (2) by inserting an individually numbered 9-or 10-digit alpha-numeric passively induced transponder (PIT) tag, (3) by taking head-on, dorsal, ventral, and side view photographs for photo-id (with particular emphasis on capturing the unique pattern of each turtle’s plastron), and (4) by taking blood samples to be screened for microsatellite DNA markers which resulted in locus-specific scores for each individual. For consistency, K. Hart performed all the notching, PIT tagging, photographing, and blood sampling throughout the study. We used the redundant marking system to ensure no tag loss or errors in identification. We also used strict, consistent protocols to catalog animals so that the possibility of misidentification would be essentially zero. We re-weighed and re-measured recaptured turtles, and released all new turtles after workup at their original capture site and all recaptured turtles at their recapture location. Additionally, we attached radiotransmitters to a subset of females to conduct short-term tracking in the study site. For analyses, we constructed a unique 5-capture history for each of the 300 terrapins from the capture and recapture data collected on each trip. Each capture history consisted of the seen (1) or not seen (0) record of the individual during each of the five sampling periods.

    We marked a total of 300 terrapins. We captured 24 animals in crab pots on the first sampling trip (November 2001), but thereafter captured terrapins only with dip nets.

    Method 0 of 3
    Type: Lab

    We used Program MARK and AIC model selection procedures to derive estimates of survival and capture probability. We used JOLLY Model B to estimate population size.

  2. From what previous works were the data drawn?

  3. How were the data generated, processed, and modified?

    Date: 2001 (process 1 of 4)
    Significant progress has been made on quantitatively establishing baseline patterns of the distribution and abundance of diamondback terrapins in the Big Sable Creek complex.

    Date: 2003 (process 2 of 4)
    Terrapin sampling using dip nets in the Big Sable Creek complex was initiated in November 2001. Samples were also taken in July 2002 and December 2002. Over 250 animals are marked, 10 females have been radio-tagged and samples have been collected for genetic analysis.

    Date: 2004 (process 3 of 4)
    Work completed in FY 2004 included:

    We continued to define population structure and genetics of Diamondback terrapins at Big Sable Creek complex immediately south of Shark River. A total of 300 unique individuals with a male: female sex ratio of 1.2:1.0 have been captured, measured, weighed, PIT tagged and had blood drawn for genetic samples. Initial population size estimate is about 1,415 individuals based on the Schnabel method. We estimated downed log cover in 6 headwater creeks to correlate with terrapin capture locations. Final objectives are to refine this population estimate, better characterize habitat use, and finish analysis of blood samples previously collected for DNA characterization.

    Date: Not complete (process 4 of 4)
    Ongoing work:

    Future analysis of mark-recapture data will allow for determination of effects of hurricanes (i. E., Hurricane Wilma, October 24, 2005) on terrapin survival and capture probabilities.

    Genetic analysis is continuing for this population to determine hurricane effects on allele frequencies over time.

    Person who carried out this activity:

    Kristen Hart
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, FL 33701

    727 803-8747 ext 3035 (voice)
    727 803-2032 (FAX)

  4. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    not available

  5. How consistent are the relationships among the observations, including topology?

    not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints: none

  1. Who distributes the data set? (Distributor 1 of 1)

    Heather S.Henkel
    U.S. Geological Survey
    600 Fourth St. South
    St. Petersburg, FL 33701

    727 803-8747 ext 3028 (voice)
    727 803-2030 (FAX)

  2. What's the catalog number I need to order this data set?

    Terrapin Mark-Recapture Study

  3. What legal disclaimers am I supposed to read?

    The data have no implied or explicit guarantees

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 01-Oct-2007
Metadata author:
Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)

Metadata standard:
Content Standard for Digital Geospatial Metadata Part 1:Biological Data Profile (FGDC-STD-001.1-1999)

This page is <https://sofia.usgs.gov/metadata/sflwww/terrapin_mark-recap_data.faq.html>

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Tue Oct 09 15:36:27 2007