Fig. 4 in Seasonal, Lunar and Tidal Influences on Habitat Use of Indo-Pacific Humpback Dolphins in Beibu Gulf, China.

Fig. 4. The profile of distance from estuary (a) and water depth (b) of humpback dolphin sightings in northern Beibu Gulf among different seasons, lunar phases and tidal phases, and significance tests (c, d). Note: "*" indicates a significance at P <0.05, "**" indicates a significance at P <0.01.