“…Interactions between dolphins, involving a variety of vigorous activities, including leaping out of the water, wave riding, body contact and sexual interactions, such as the 'belly-to-belly' position (Karczmarski, Cockcroft & McLachlan, 1999) Travel Continuous swimming movement in a specific direction (Karczmarski, Cockcroft & McLachlan, 1999) Rest Low activity levels, dolphins floating stationary and motionless at the surface, with some occasional slow forward movement (Karczmarski, Cockcroft & McLachlan, 1999) Forage Searching for food with random movements, generally with no specific direction, including frequent asynchronous diving, searching for prey (Karczmarski, Cockcroft & McLachlan, 1999) Feed Coordinated surface behaviour in order to prey. Usually include coordinated feeding tactics such as wall formation, perpendicular feeding, kettle and line abreast behaviour (Oliveira et al, 2013) T A B L E 2 The number of groups of Guiana dolphin sighted and the sampling effort employed during each time series in Sepetiba Bay, southeastern Brazil. F I G U R E 2 Sepetiba Bay, southeastern Brazil, showing the Guiana Dolphin MPA, areas of shipping and industrial use, and survey sampling effort in 1 km grid squares for the historical (1998, 1999, 2001, 2002, 2006 and 2007) and current (2017-2019) time series.…”