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Table 1 Atalaia fishermen's consensual responses about S. guianensis

From: Behaviour of Sotalia guianensis(van Bénéden, 1864) (Cetacea, Delphinidae) and ethnoecological knowledge of artisanal fishermen from Canavieiras, Bahia, Brazil

Aspect N° of distinct responses Consensual response It Ic LF
Presence of S. guianensis in the studied area 1 Yes 26 26 100
Local name for the species 2 Boto 26 25 96
Entry into /exit from the Pardo River 1 Yes 26 26 100
Reason for entering the Pardo River 3 ‘To catch fish', to drink their blood 26 20 77
Time of the year they appear 2 The whole year 26 22 85
Differentiation 1 The younger ones are lighter; they get darker as they get older 26 26 100
Use of Pardo River 1 They use the inlet most; they go further in but they prefer the inlet 26 26 100
Presence of infants 2 Yes 26 21 81
Number of infants per group 3 One or two infants, depending on the size of the group 26 14 54
Time of year that infants are present 3 Throughout the year, sometimes there are more but I'm not sure exactly 26 13 50
Time of day that the dolphins appear 2 It depends on the tide 26 19 73
Gregarious behaviour 1 They live in groups. Lone individuals are rarely seen. 26 26 100
Number of individuals per group 1 From two to eight 26 26 100
Main observed activity 2 ‘Catching fishing' and ‘passing normally' 26 16 61
Feeding strategy 1 Circling and chasing rake stardrum (Stellifer rastrifer) 26 26 100
Noticeable behaviour 5 Beating the tail on the branches of the mangrove to scare the fish 20 10 50
Surface behaviour 3 Criss-crossing each other. Lone jumps. Jumps and rotates, executing a 'pirouette' 26 18 69
Parts of the body frequently exposed 3 The 'beak', the 'wings', the tail 26 19 73
Reproductive behaviour 1 No 26 26 100
Play 1 Jumps, crosses, slaps wing, somersaults, belly jumps, back jumps, raises its head out of the water then sinks back, throws the rake stardrum (Stellifer rastrifer) into the air 26 26 100
Interaction with fishing 1 Helps the fisherman. The fish flee to shallow areas 26 26 100
Interaction with boats 1 Are used to them but scared when there is a lot of noise 26 26 100
Interaction with fishing gear 2 Rarely become entangled. They see the nets 26 23 88
  1. It = number of informants who responded; Ic = number of informants who gave the consensual response; LF = level of fidelity.