Population Size and Sex Ratio of Wintering Scaly-Sided Merganser Mergus squamatus in the Poyang Lake Water System, Jiangxi Province, China
Zhi Yijin and Shao Mingqin*
College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
Fig. 1.
Distribution of surveyed areas in four rivers of Poyang Lake water system in Jiangxi Province. Number in the map means sex ratio in that river; different-sized points mean different population size in the corresponding proportion. — means transect lines where we investigated the mergansers.
Fig. 2.
Sex ratio of scaly-sided mergansers in seven river sections of Poyang Lake water system.
Fig. 3.
Relationship between sex ratios and group size of scaly-sided merganser in Poyang Lake water system.