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Distribution and Abundance of the Mariana Common Moorhen

Waterbirds

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Abstract

Island-wide surveys for the endangered Mariana subspecies of the Common Moorhen (Gallinula chloropus guami) were conducted on Guam and the Commonwealth of the Northern Mariana Islands from May through September 2001. Based on these counts, the total adult moorhen population is estimated to be 287, with 154, 41, 2, and 90 adult moorhens on Saipan, Tinian, Rota, and Guam, respectively. Results suggest an overall increase in birds on Saipan and Tinian, although moorhen numbers on Guam may be declining. High counts of moorhens on Lake Hagoi, Tinian, during the wet season suggested movement from Saipan to Tinian occurs at the onset of the wet season each year. Conservation efforts need to consider Saipan and Tinian moorhens as a single demographic unit. Further, monitoring of moorhens, invasive vegetation management, and predator and ungulate control on wetlands are critical for this small population.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Distribution and Abundance of the Mariana Common Moorhen
Series title:
Waterbirds
Volume
27
Issue:
2
Year Published:
2004
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 245-250
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Waterbirds
First page:
245
Last page:
250
Number of Pages:
6