Mariana common moorhen telemetry data - 2001

Frequently-anticipated questions:

What does this data set describe?

Title: Mariana common moorhen telemetry data - 2001
Abstract:
This data set consists of spreadsheets containing gps locations and bearings to common moorhen sightings. Data were collected in the wet and dry seasons in 2001.
  1. How should this data set be cited?

    Takano, L. L. , Unpublished Material, Mariana common moorhen telemetry data - 2001.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 144.65164
    East_Bounding_Coordinate: 144.75522
    North_Bounding_Coordinate: 13.44406
    South_Bounding_Coordinate: 13.29928
    Description_of_Geographic_Extent: Guam and Marianas Islands

  3. What does it look like?

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

    Beginning_Date: 18-Apr-2001
    Ending_Date: 13-Jul-2001
    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?

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

  7. How does the data set describe geographic features?

    2001data_v3.xls
    Microsoft Excel spreadsheet containing raw telemetry data (Source: Microsoft)

    Azimuth
    bearing to bird (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:360
    Units:degrees
    Resolution:1

    Comments
    descriptive notes (Source: dataset developer)

    Notes field

    Date
    date of survey (Source: dataset developer)

    Microsoft date format (dd/mm/yyy)

    Freq
    radio frequency used to identify and track individual birds (Source: dataset developer)

    Range of values
    Minimum:165.026
    Maximum:165.915
    Units:kilohertz
    Resolution:0.001

    Lat
    Latitude measurment of GPS unit. (Source: dataset developer)

    Range of values
    Minimum:0000000
    Maximum:9000000
    Units:Concatenated degrees minutes and decimal seconds
    Resolution:0.1

    Lat(dd)
    Latitude of GPS unit (calculated from lat) (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:90
    Units:decimal degrees
    Resolution:0.0001

    Long
    Longitude measurment of GPS unit (Source: dataset developer)

    Range of values
    Minimum:00000000
    Maximum:36000000
    Units:Concatenated degrees minutes and decimal seconds
    Resolution:0.1

    Long(dd)
    Longitude of GPS unit (calculated from long) (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:360
    Units:decimal degees
    Resolution:0.0001

    SignalS
    Signal strength (Source: dataset developer)

    Range of values
    Minimum:1
    Maximum:5

    Station
    Descriptive notes about station location (Source: Dataset developer)

    Notes field

    Time
    Time of GPS measurement (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:2400
    Units:Concatenated hours minutes
    Resolution:1

    utm_x
    UTM Easting coordinate location of GPS unit - calculated from long(dd) (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:1,000,000
    Units:meters
    Resolution:0.001

    utm_y
    UTM Northing coordinate location of GPS unit - calculated from lat(dd) (Source: dataset developer)

    Range of values
    Minimum:0
    Maximum:unknown
    Units:meters
    Resolution:0.001

  8. What biological taxa does this data set concern?

    Taxonomy:
    Keywords/Taxon:
    Taxonomic_Keyword_Thesaurus: none
    Taxonomic_Keywords: birds
    Taxonomic_Classification:
    Taxon_Rank_Name: Kingdom
    Taxon_Rank_Value: Animalia
    Taxonomic_Classification:
    Taxon_Rank_Name: Phylum
    Taxon_Rank_Value: Chordata
    Taxonomic_Classification:
    Taxon_Rank_Name: Sub Phylum
    Taxon_Rank_Value: Vertebrata
    Taxonomic_Classification:
    Taxon_Rank_Name: Class
    Taxon_Rank_Value: Aves
    Taxonomic_Classification:
    Taxon_Rank_Name: Order
    Taxon_Rank_Value: Gruiformes
    Taxonomic_Classification:
    Taxon_Rank_Name: Family
    Taxon_Rank_Value: Rallidae
    Taxonomic_Classification:
    Taxon_Rank_Name: Genus
    Taxon_Rank_Value: Gallinula
    Taxonomic_Classification:
    Taxon_Rank_Name: Species
    Taxon_Rank_Value: Gallinula chloropus
    Taxonomic_Classification:
    Taxon_Rank_Name: Sub Species
    Taxon_Rank_Value: Gallinula chloropus guami
    Applicable_Common_Name: mariana common moorhen

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?

    This study was funded by the US Navy.

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

    Haig, Susan M.
    US Geological Survey Forest and Rangeland Ecosystem Science Center
    3200 SW Jefferson Way
    Corvallis, OR 97331

    (541) 750-7482 (voice)
    (541) 758-8806 (FAX)
    susan_haig@usgs.gov

Why was the data set created?

The Mariana Common Moorhen is federally listed as an endangered species and among the recovery goals for this subspecies is to attain more information on moorhen movement pattern and home range during the dry and wet season. In addition, an updated moorhen estimate is needed.

How was the data set created?

  1. What methods were used to collect the data?

    Method 0 of 1
    Type: Field

    Radio-telemetry (home range and movement data) Capture and Marking We tracked Guam moorhens daily from March to August 2000 and March to June 2001. Individuals not located on Guam were searched for on the other three islands (Rota, Tinian, Saipan) during routine surveys. Guam birds were tracked once every two weeks from September 2000 to February 2001. Saipan-captured moorhens were tracked bi-weekly from June to September 2000 and weekly from June to September 2001. Missing individuals were searched for on the other islands (Tinian, Rota, Guam) during routine surveys. Most tracking was conducted during daylight hours (approx. 0600 - 1800 hrs); however, we also sampled after dark to identify nocturnal roost sites.

    Multi-island tracking consisted of routine searches on Guam and Saipan (as described above) and periodic surveys on Rota and Tinian when missing individuals were not found on Guam or Saipan. On Rota, surveys consisted of visual observations for banded moorhens and radio telemetry on golf course wetlands and water treatment ponds. On Tinian, ground telemetry surveys were used to detect missing radio-tagged moorhens on Lake Hagoi. Aerial telemetry was conducted when ground surveys failed to locate missing individuals. Missing individuals that were not detected by ground or aerial surveys were assumed to have lost their radios or had their radios fail prematurely.

    Exact positions of radio-marked birds were determined on the ground via triangulation of at least three bearings. A 2-element ‘H’ hand-held antenna and receiver (Model R2100, Advanced Telemetry Systems, Inc.) was used to detect transmitter signals. Each bearing was recorded with a global positioning system unit (GPS II+; Garmin Ltd. Olathe, KS). Individual locations were recorded once daily. During aerial telemetry, locations of individuals were marked on a map and sites were revisited by foot to determine exact locations. Location data was analyzed by LOAS (Ecological Software Solutions 2001), which produced estimates of individual locations.

  2. From what previous works were the data drawn?

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

    Date: Unknown (process 1 of 1)
    Original data collection; no processing

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

    Takano, L. L. , Unpublished Material, Mariana common moorhen home range data.

    Takano, L. L. , Unpublished Material, Mariana common moorhen - wetland summary data.

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

  1. How well have the observations been checked?

    No tests for attribute accuracy were conducted.

  2. How accurate are the geographic locations?

    Exact positions of radio-marked birds were determined on the ground via triangulation of at least three bearings. A 2-element ‘H’ hand-held antenna and receiver (Model R2100, Advanced Telemetry Systems, Inc.) was used to detect transmitter signals. Each bearing was recorded with a global positioning system unit (GPS II+; Garmin Ltd. Olathe, KS).

  3. How accurate are the heights or depths?

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

    See Methodology

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

    Bird locations were displayed with digital raster graphic images of Guam to determine outliers. Erroneous points were corrected or removed from the data set.

How can someone get a copy of the data set?

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

Access_Constraints: Data are available after research results are published.
Use_Constraints: None

Who wrote the metadata?

Dates:
Last modified: 03-Feb-2004
Last Reviewed: 10-Feb-2004
Metadata author:
U.S. Geological Survey (USGS), Forest and Rangeland Ecosystems Science Center (FRESC)
c/o Metadata Coordinator
777 NW 9th St
Suite 400
Corvallis, Oregon 97330

541-750-1030 (voice)
541-750-1069 (FAX)

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

Generated by mp version 2.8.10 on Wed Aug 16 09:43:26 2006