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Dugong relative density and distribution
James Cook University
Dataset credit
Alana Grech and Helene Marsh, School of Earth and Environmental Sciences, James Cook University
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Contacts
| Role | Name | Organization | |
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| Primary contact |
Alana Grech |
James Cook University |
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| Data entry |
Ei Fujioka |
Duke University |
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Citation
Grech, A. 2008. Dugong relative density and distribution. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/892e4662. Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
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Abstract
Information collected from dugong aerial surveys in Australian waters conducted since the mid 1980's provide empirical data on patterns of dugong distribution and abundance. In conjunction with geostatistical techniques, including universal kriging, aerial survey information was used to develop a spatially-explict model of dugong relative density and distribution calculated at a grid size of 2km × 2km.
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Purpose
Spatially-explicit population models are an important component of species conservation management. The dugongs range is large, complex and dynamic and extends over multiple jurisdictions. Models of dugong relative density and distribution in Australian waters were developed to inform government agencies and other interested parties on the suitability of various managment regimes, including the design of area closures.
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Supplemental information
Per request by the data provider, point observations are not included. Please contact the data provider if you wish to obtain them. Due to the lack of point observations, some features on the Dataset Detail are not available.
The model outputs (dugong density and conservation values) are downloadable. Switch to [Download] tab and click "Get this data as ESRI shapefile." They are in fact rasters. Refer to the reference for more detail.
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Change History
The dataset has been updated over time as outlined below. Each entry includes the version number, release date, type of change, and a short description.
- 1.0.0 (2008-11-21) - Initial
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References
Grech, A. and M. Helene. 2007. Prioritising areas for dugong conservation in a marine protected area using a spatially explicit population model. Applied GIS. Volume 3, Number 2.
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Attributes
Overview
Per request by the data provider, point observations are not included. Please contact the data provider if you wish to obtain them.
The following column entries do not reflect the actual data structure.
Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.
Attributes in dataset
| Attribute (table column) | Description |
|---|
| obs_date | definition not provided |
| obs_time | definition not provided |
| latitude | definition not provided |
| longitude | definition not provided |
| species | definition not provided |
| sp_tsn | ITIS Taxonomic Serial Number added by OBIS-SEAMAP |
| obs_count | definition not provided |
| geom | definition not provided |
| oid | definition not provided |
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| OBIS-SEAMAP ID | 481 |
| DOI | 10.82144/892e4662 |
| Version | 1.0.0 |
| Seabirds | 0 |
| Marine mammals | 1 |
| Sea turtles | 0 |
| Rays and sharks | 0 |
| Other species | 0 |
| Non spatial | 0 |
| Non species | 0 |
| Total | 1 |
| Date, Begin | 2008-11-11 |
| Date, End | 2008-11-11 |
| Temporal prec. | 111000 |
| Latitude | -28.50 - -8.10 |
| Longitude | 134.50 - 153.10 |
| Coord. prec. | 6 decimal digits |
| Platform | Plane |
| Data type | |
| Effort | N/A |
| Registered | 2008-11-21 |
| Updated | 2008-11-21 |
| Status | Published |
Sharing policy |
CC-BY-NC (Minimum) |
| Shared with |
None |
| Metadata in static HTML / FGDC / EML |
| See download history / statistics |
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