5Guo J. River dolphins down for the count and perhaps out [J]. Science, 2006, 314(5807): 1860.
6Jefferson T A, Wang J Y. Revision of the taxonomy of fin- less porpoises (genus Neophocaena): The existence of two species [J]. Journal of Marine Animals and Their Ecology, 2011, 4(1): 3-16.
7Wang J Y, Frasier T R, Yang S C, et al. Detecting recent speciation events: the case of the finless porpoise (genus Neophocaena) [J]. Heredity, 2008, 101(2): 145-155.
8William F P, Baker C S, Berta A, et al. List of Marine Mam- mal Species and Subspecies. [EB/OL]. [2011-12-13]. http://www.marinemarnmalscience.org/.
9Wang D, Turvey S T, Zhao, X. et al. Neophocaena asiaeori- entalis ssp. asiaeorientalis. The IUCN Red List of Threatened Species 2013: e. T43205774A45893487. http://dx.doi.org/.
10Zhao X, Barlow J, Taylor B L, et al. Abundance and conser- vation status of the Yangtze finless porpoise in the Yangtze River [J]. Biological Conservation, 2008, 141(12): 3006-3018.