Age and growth of franciscana, Pontoporia blainvillei , and Guiana, Sotalia guianensis , dolphins from southeastern Brazil

2020 ◽  
Author(s):  
Valéria R. M. Conversani ◽  
Débora F. Silva ◽  
Rodrigo A. Barbosa ◽  
Aleta A. Hohn ◽  
Marcos C. de O. Santos
Keyword(s):  
Age And Growth ◽  
Southeastern Brazil ◽  
Sotalia Guianensis ◽  
Pontoporia Blainvillei

Abundance Estimates of Guiana Dolphins (Sotalia guianensis; Van Bénéden, 1864) Inhabiting an Estuarine System in Southeastern Brazil

2019 ◽  
Vol 45 (1) ◽  
pp. 56-65 ◽  
Author(s):  
Aline B. de Mello ◽  
Julia M. B. Molina ◽  
Maja Kajin ◽  
Marcos C. de O. Santos
Keyword(s):  
Southeastern Brazil ◽  
Estuarine System ◽  
Sotalia Guianensis ◽  
Abundance Estimates

scholarly journals Age and growth of franciscana dolphins, Pontoporia blainvillei (Cetacea: Pontoporiidae) incidentally caught off southern Brazil and northern Argentina

2010 ◽  
Vol 90 (8) ◽  
pp. 1493-1500 ◽  
Author(s):  
Silvina Botta ◽  
Eduardo R. Secchi ◽  
Mônica M.C. Muelbert ◽  
Daniel Danilewicz ◽  
Maria Fernanda Negri ◽  
...  
Keyword(s):  
Growth Models ◽  
Growth Curves ◽  
Small Sample ◽  
Age And Growth ◽  
Buenos Aires Province ◽  
Von Bertalanffy ◽  
Southern Brazil ◽  
Data Set ◽  
Males And Females ◽  
Pontoporia Blainvillei

Age and length data of 291 franciscana dolphins (Pontoporia blainvillei) incidentally captured on the coast of Rio Grande do Sul State (RS), southern Brazil, were used to fit growth curves using Gompertz and Von Bertalanffy growth models. A small sample of franciscanas (N = 35) from Buenos Aires Province (BA), Argentina, were used to see if there are apparent growth differences between the populations. Male and female franciscana samples from both areas were primarily (78–85%) <4 years of age. The Von Bertalanffy growth model with a data set that excluded animals <1 year of age provided the best fit to data. Based on this model, dolphins from the RS population reached asymptotic length at 136.0 cm and 158.4 cm, for males and females, respectively. No remarkable differences were observed in the growth trajectories of males and females between the RS and BA populations.

scholarly journals Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil

2012 ◽  
Vol 102 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Marta J. Cremer ◽  
Pedro C. Pinheiro ◽  
Paulo C. Simões-Lopes
Keyword(s):  
Prey Species ◽  
Stomach Contents ◽  
Frequency Of Occurrence ◽  
Teleost Fishes ◽  
Southern Brazil ◽  
Sympatric Populations ◽  
Sotalia Guianensis ◽  
Important Prey ◽  
Pontoporia Blainvillei ◽  
Lolliguncula Brevis

The present study provides information about the diet of sympatric populations of small cetaceans in the Babitonga Bay estuary. This is the first study on the diet of these species in direct sympatry. The stomach contents of seven Guiana dolphins Sotalia guianensis and eight franciscanas Pontoporia blainvillei were analyzed. The prey of both cetaceans was mostly teleost fishes, followed by cephalopods. We identified 13 teleost fishes as part of the diet of the franciscanas, and 20 as part of the diet of Guiana dolphins. Lolliguncula brevis was the only cephalopod recorded, and was the most important prey for both cetaceans. Stellifer rastrifer and Gobionellus oceanicus were also important for franciscana, so as Mugil curema and Micropogonias furnieri were important for Guiana dolphins. Stellifer rastrifer and Cetengraulis edentulus were the fishes with the highest frequency of occurrence for franciscana (50%), while Achirus lineatus, C. edentulus, S. brasiliensis, Cynoscion leiarchus, M. furnieri, M. curema, Diapterus rhombeus, Eugerres brasilianus and G. oceanicus showed 28.6% of frequency of occurrence for Guiana dolphins. Franciscanas captured greater cephalopods than the Guiana dolphins in both total length (z= -3.38; n= 40; p< 0.05) and biomass (z = -2.46; n = 40; p<0.05). All of the prey species identified occur inside the estuary, which represents a safe habitat against predators and food availability, reinforcing the importance of the Babitonga Bay for these cetacean populations.

scholarly journals Morphology of the franciscana (Pontoporia blainvillei) off southeastern Brazil: sexual dimorphism, growth and geographic variation

2002 ◽  
Vol 1 (1) ◽  
Author(s):  
R. M. A. Ramos ◽  
A. P. M. Di Beneditto ◽  
S. Siciliano ◽  
M. C. O. Santos ◽  
A. N. Zerbini ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Geographic Variation ◽  
Southeastern Brazil ◽  
Pontoporia Blainvillei

Total and subcellular Ti distribution and detoxification processes in Pontoporia blainvillei and Steno bredanensis dolphins from Southeastern Brazil

2020 ◽  
Vol 153 ◽  
pp. 110975 ◽  
Author(s):  
Fernanda Monteiro ◽  
Leila S. Lemos ◽  
Jailson Fulgêncio de Moura ◽  
Rafael Christian Chávez Rocha ◽  
Isabel Moreira ◽  
...  
Keyword(s):  
Southeastern Brazil ◽  
Steno Bredanensis ◽  
Pontoporia Blainvillei

EVALUATING THE EFFECTS OF ANTHROPOGENIC NOISE ON ESTUARINE DOLPHINS (SOTALIA GUIANENSIS) FROM CANANEIA, SOUTHEASTERN BRAZIL

Bioacoustics ◽  
2008 ◽  
Vol 17 (1-3) ◽  
pp. 181-182
Author(s):  
MARIO M. ROLLO ◽  
FABIANE SAYURI IWAI ◽  
JULIA MAZININI ROSA
Keyword(s):  
Anthropogenic Noise ◽  
Southeastern Brazil ◽  
Sotalia Guianensis

scholarly journals INTESTINAL HELMINTHS OF FRANCISCANA (Pontoporia blainvillei) AND GUIANA DOLPHINS (Sotalia guianensis) FROM THE NORTH COAST OF SANTA CATARINA STATE, BRAZIL

2017 ◽  
Vol 21 (01) ◽  
pp. 83-87 ◽  
Author(s):  
Ana Kassia de Moraes Alves ◽  
Elizabeth Annie Lourdes Souza ◽  
Juliana Marigo ◽  
Marta Jussara Cremer
Keyword(s):  
North Coast ◽  
Intestinal Helminths ◽  
Santa Catarina ◽  
Sotalia Guianensis ◽  
The North ◽  
Pontoporia Blainvillei ◽  
Santa Catarina State
Sign in / Sign up

Export Citation Format

Share Document