Population
The subpopulation was estimated to number 99 individuals (CV=51.6%) in the mid-2000s (Wang et al. 2007a). By analogy with the Pearl River Estuary subpopulation of S. chinensis, mature individuals constitute about 60% of this subpopulation (Jefferson 2000), or about 60. Using a default value of 50% percent for this species (Taylor et al. 2007), however, would suggest only about 50 mature individuals. Almost all individually recognizable dolphins were novel in 2002 but by 2004, most had been photographed in previous years (Wang et al. 2007a); the catalogue of recognizable dolphins numbered fewer than 30 at that time (J.Y. Wang pers. comm., December 2007).
Population Trend
In the latest article
Source information
© International Union for Conservation of Nature and Natural Resources
© International Union for Conservation of Nature and Natural Resources
View source
Supplier:
IUCN
Author: Reeves, R.R., Dalebout, M.L., Jefferson, T.A., Karczmarski, L., Laidre, K., O’Corry-Crowe, G., Rojas-Bracho, L., Secchi, E.R., Slooten, E., Smith, B.D., Wang, J.Y. & Zhou, K.
Compiler: Reeves, R.R., Dalebout, M.L., Jefferson, T.A., Karczmarski, L., Laidre, K., O’Corry-Crowe, G., Rojas-Bracho, L., Secchi, E.R., Slooten, E., Smith, B.D., Wang, J.Y. & Zhou, K.
Reeves, R.R., Dalebout, M.L., Jefferson, T.A., Karczmarski, L., Laidre, K., O’Corry-Crowe, G., Rojas-Bracho, L., Secchi, E.R., Slooten, E., Smith, B.D., Wang, J.Y. & Zhou, K. 2008. Sousa chinensis (eastern Taiwan Strait subpopulation). In: IUCN 2010 . IUCN Red List of Threatened Species. Version 2010.4 . <www.iucnredlist.org>
Revisions
- 2012-05-16 12:44:47 UTC
- 2011-08-25 05:56:00 UTC
- 2011-04-08 14:20:23 UTC
- 2011-02-09 20:24:36 UTC
- 2011-01-13 02:29:42 UTC
