Affiliation: | 1. School of Life Sciences, Sun Yat-sen University, Guangzhou, P. R. China.; 2. School of Marine Sciences, Sun Yat-sen University, Guangzhou, P. R. China.; 3. Guang Dong Pearl River Estuary Chinese White Dolphin National Nature Reserve, Zhuhai, P. R. China.; Auburn University, United States of America, |