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