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sible to observe that dolphins use the area irregularly and some individuals may use
more frequently one sector. Knowledge such as this may indicate different degree of
fidelity for the area as a whole as well as for different sectors, besides assisting in
the creation of management plans for conservation units according to local need of
a better understanding of the area use of the Guiana dolphin.
Further, recent studies seek to understand what factors influence the occurrence
and habitat use of Guiana dolphins in Cananéia region. Godoy et al. (2015) observed
that dolphins concentrate mainly in the region close to the adjacent ocean. The
Fig. 2.10 Individuals of photo-identification catalogue of Instituto de Pesquisas Cananéia, used in
studies of population dynamics, special patterns and social organization of Guiana dolphin’s population of Cananéia estuary, State of São Paulo, Brazil
Fig. 2.11 Individual photo-identification in two close, but geomorphologically distinct sites; Site
“T”, known as “Ponta da Trincheira”, and Site “P”, known as “Praia do Pereirinha”. Light shaded
circle and dark shaded diads represents single individual captured exclusively in one or in both
sites, respectively. Circle size refers to the number of months individuals were seen in each site,
regardless the capture frequency within each month
2 Long-Term Monitoring of Dolphins in a Large Estuarine System of Southeastern…
sible to observe that dolphins use the area irregularly and some individuals may use
more frequently one sector. Knowledge such as this may indicate different degree of
fidelity for the area as a whole as well as for different sectors, besides assisting in
the creation of management plans for conservation units according to local need of
a better understanding of the area use of the Guiana dolphin.
Further, recent studies seek to understand what factors influence the occurrence
and habitat use of Guiana dolphins in Cananéia region. Godoy et al. (2015) observed
that dolphins concentrate mainly in the region close to the adjacent ocean. The
Fig. 2.10 Individuals of photo-identification catalogue of Instituto de Pesquisas Cananéia, used in
studies of population dynamics, special patterns and social organization of Guiana dolphin’s population of Cananéia estuary, State of São Paulo, Brazil
Fig. 2.11 Individual photo-identification in two close, but geomorphologically distinct sites; Site
“T”, known as “Ponta da Trincheira”, and Site “P”, known as “Praia do Pereirinha”. Light shaded
circle and dark shaded diads represents single individual captured exclusively in one or in both
sites, respectively. Circle size refers to the number of months individuals were seen in each site,
regardless the capture frequency within each month
2 Long-Term Monitoring of Dolphins in a Large Estuarine System of Southeastern…