Mariana common moorhen home range data

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
  8. What biological taxa does this data set concern?
  9. What special analytical tools are available to help me understand this data set?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. What methods were used to collect the data?
  2. From what previous works were the data drawn?
  3. How were the data generated, processed, and modified?
  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?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Takano, L. L. , Unpublished Material, Mariana common moorhen home range data.

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: Mar-2000

   Ending_Date: Sep-2001

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: vector digital data

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?

      Grid_Coordinate_System_Name: Universal Transverse Mercator

      Universal_Transverse_Mercator:

      UTM_Zone_Number: 55

      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.9996

      Longitude_of_Central_Meridian: 147

      Latitude_of_Projection_Origin: 0

      False_Easting: 500000

      False_Northing: 0

      Planar coordinates are encoded using Coordinate Pair
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in m

      The horizontal datum used is WGS84.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.
      

7. How does the data set describe geographic features?

   various - See Supplemental Information

   ArcGIS database file (Source: ESRI)

   DATE

   date of observation (Source: dataset developer)

   date format (dd/mm/yyyy)

   FREQ

   radio frequency - the digits to the right of the decimal determine a unique bird identifier (Source: dataset developer)

   Range of values
   Minimum:	165.000
   Maximum:	165.999
   Units:	kilohertz

   X_ESTIMATE

   estimated UTM x coordinate (easting) of bird location (Source: Defense Mapping Agency Technical Manual 8358.1)

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

   Y_ESTIMATE

   UTM y coordinate (northing) of bird location (Source: Defense Mapping Agency Technical Manual 8358.1)

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

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

9. What special analytical tools are available to help me understand this data set?

   Tool 0 of 1

   LOAS software analyzes the GPS locations of the observer and the bearings to the observation to estimate the position of the bird through a process of triangulation.

   How to obtain this tool:

   >

   >

   How to access the tool:

   Tool_Access_Instructions: Available at website

   Computer and operating system needed:

   Tool_Computer_and_Operating_System: Windows operating system

Who produced the data set?

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

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.

   From what previous works were the data drawn?

   How were the data generated, processed, and modified?

   Date: Unknown (process 1 of 1)

   Original data collection; no processing

   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?

   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?

   Location data was analyzed by LOAS (Ecological Software Solutions 2001), which produced estimates of individual locations. 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: 29-Jan-2004
Last Reviewed: 05-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)