Population information

Order name Anseriformes
Family name Anatidae
Scientific name Mareca strepera Common name Gadwall
Population name strepera, E Asia (non-bre)
Breeding range N E Asia Non-breeding range E Asia
Red List Category Least Concern
Ramsar regions Asia
Notes

Conservation Framework

Conservation framework Notes
EAAF Partnership
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 0 0 25,000 100,000 [R714]
WPE 2 0 0 25,000 100,000 [R714]
WPE 3 0 0 500,000 1,000,000 [R455]
WPE 4 0 0 500,000 1,000,000 [R455]
WPE 5 0 0 500,000 1,000,000 [R455]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 1977 1991 DEC [R519]
WPE 2 1977 1991 DEC [R519]
WPE 3 1977 1991 DEC [R519]
WPE 4 1977 1991 DEC [R519]
WPE 5 1977 1991 DEC [R519]

Population 1% level

Publication Yearset 1 percent Note
WPE 1 0 -1
WPE 2 0 -1
WPE 3 2002 7500
WPE 4 2006 7500
WPE 5 2012 7100

References

  • R714 - Yanagisawa, N., Fujimaki, Y. and Higuchi, H. (pers. comm.). 1993. Japanese data on waterbird population sizes, summarised for IWRB.
  • R519 - Perennou, C.P., Mundkur, T. and Scott, D.A. 1994. The Asian Waterfowl Census 1987-1991: distribution and status of Asian waterfowl. IWRB Spec. Publ. No. 24; AWB Spec. Publ. No. 86. Slimbridge, UK and Kuala Lumpur, Malaysia.
  • R455 - Miyabayashi, Y. and Mundkur, T. 1999. Atlas of Key Sites for Anatidae in the East Asian Flyway. Wetlands International ? Japan ? Tokyo, and Wetlands International ? Asia Pacific, Kuala Lumpur. 148 pp.

Notes




Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on