Exploratory clam survey of Florida nearshore and estuarine waters with commercial hydraulic dredging gear.

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Frequently-anticipated questions:

What does this data set describe?

Title:
Exploratory clam survey of Florida nearshore and estuarine waters with commercial hydraulic dredging gear.
Abstract:
Distribution and abundance of commercial clams were investigated, using a hydraulic Nantucket clam dredge and a Maryland soft-shell escalator clam dredge at 846 stations along the west and southeast coasts of Florida, during 1970 and 1971. Sunray venus clams, Macrocallista nimbosa, occurred along the entire west coast but were more abundant north of Tampa Bay and were found in commercial quantities only on the existing commercial Bell Shoal bed. Southern quahogs, Mercenaria carnpechiensis, were most abundant near passes along central and southwest Florida. In bays, both species were usually associated with seagrasses, but this was not noted in open Gulf collections. Both species were seldom collected beyond 9.2 m depths. The most abundant bivalve was the marsh clam, Rangla cuneata, confined to brackish areas of the Peace and Myakka Rivers. At lower salinities R. cuneata were larger and had more size classes.
  1. How should this data set be cited?

    Godcharles, Mark. F. , Jaap, Walter C. , and Florida Department of Natural Resources, 1973, Exploratory clam survey of Florida nearshore and estuarine waters with commercial hydraulic dredging gear.: Professional Paper 21.

    Online Links:

    Other_Citation_Details:
    Florida Department of Natural Resources, Marine Research Laboratory, St. Petersburg, Florida

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -85.56389
    East_Bounding_Coordinate: -81.13333
    North_Bounding_Coordinate: 30.00556
    South_Bounding_Coordinate: 24.675

  3. What does it look like?

    FlaDNR21.jpg
    Image showing geographic extent of data layer coverage

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

    Calendar_Date: 1973
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: document

  6. How does the data set represent geographic features?

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Entity point (752)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.12345. Longitudes are given to the nearest 0.12345. Latitude and longitude values are specified in Decimal degrees.

  7. How does the data set describe geographic features?

Who produced the data set?

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

  2. Who also contributed to the data set?

    Please review the cross reference information for the original data set credit to Godcharles and Jaap (1973), and Jim Flocks and Brian Buczkowski for digitizing samples locations and entering the data from the source report.

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

    Brian J. Buczkowski
    U.S. Geological Survey
    Core Curator and Data Management Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    (508) 458-8700 x2361 (voice)
    (508) 457-2310 (FAX)
    bbuczkowski@usgs.gov

Why was the data set created?

The purpose of this data layer is to create a digital version of the sedimentary characteristics published by Godcharles and Jaap (1973) for inclusion in the usSEABED data collection.

How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 1)
    Digital data were hand formatted into dbSEABED data entry structure, then filtered and data-mined through dbSEABED software (version: db9_MNEx.bas)

    Person who carried out this activity:

    Brian J. Buczkowski
    U.S. Geological Survey
    Core Curator and Data Management Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    (508) 458-8700 x2361 (voice)
    (508) 457-2310 (FAX)

  3. 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?

    All attributes were entered and checked in a consistent manner.

  2. How accurate are the geographic locations?

    Navigational accuracy is unknown.

  3. How accurate are the heights or depths?

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

    Sedimentary descriptions and locations are provided for 752 samples.

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

    No additional check for topological consistency were performed on this data.

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 except that acknowledgement must be made in publications and reports of (i) the original data source, and (ii) the data integration by USGS and dbSEABED project at the University of Colorado.

  1. Who distributes the data set?[Distributor contact information not provided.]

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

    Godcharles and Jaap, 1973

  3. What legal disclaimers am I supposed to read?

    Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS 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 the USGS in the use of these data or related materials. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 27-Mar-2006
Metadata author:
U.S. Geological Survey
c/o Brian J. Buczkowski
Core Curator and Data Management Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2361 (voice)
(508) 457-2310 (FAX)
bbuczkowski@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.24 on Mon Mar 27 19:54:33 2006