Results 61 to 70 of about 1,287 (160)

On the feeding habit of the Guiana Dolphin Sotalia guianensis (van Bénedèn, 1864) (Mammalia: Cetartiodactyla: Delphinidae) in southeastern Brazil (~220S): has there been any change in more than two decades?

Journal of Threatened Taxa, 2017
Along the north and central coast of Rio de Janeiro State (22025’S–23000’S), southeastern Brazil, the Guiana Dolphin Sotalia guianensis forages on neritic prey, mainly fish.
Ana Paula Madeira Di Beneditto, Clara da Cruz Vidart Badia, Salvatore Siciliano   +2 more
doaj   +1 more source

Do Boat Traffic and Habitat Features Shape Habitat Use by Guiana Dolphins (Sotalia guianensis) in a Brazilian Estuary?

Ecology and Evolution, Volume 16, Issue 7, July 2026.
This study investigates how boat traffic and environmental factors shape the spatial distribution and habitat selection of Guiana dolphins in a northeastern Brazilian estuary. Although dolphins and boats overlapped broadly—particularly in deeper waters—dolphins showed a preference for areas with lower boat traffic, greater depths, and proximity to ...
Alice Lima, Gastón Andrés Fernandez Giné, Khamila Tondinelli Souza Cruz, Niel Nascimento Teixeira, Gil Marcelo Reuss Strenzel, Yvonnick Le Pendu   +5 more
wiley   +1 more source

Etnoecologia e captura acidental de golfinhos (Cetacea: Pontoporidae e Delphinidae) na Baía da Babitonga, Santa Catarina

Desenvolvimento e Meio Ambiente, 2003
Este trabalho faz uma análise etnoecológica da captura acidental de golfinhos das espécies Pontoporiablainvillei e Sotalia guianensis pela pesca artesanal na Baía da Babitonga (Santa Catarina).
Luciana Pinheiro, Marta Cremer
doaj   +1 more source

Diversidad Genética y cambios demográficos históricos en la población del delfín Costero Sotalia guianensis (Cetacea: Delphinidae) de la desembocadura del Río Amazonas, en la ciudad de Belém, Brasil [PDF]

, 2010
Los delfines del género Sotalia se encuentran distribuidos por todas las costas del océano Atlántico en América Central y del Sur, así mismo como en el Río Amazonas y algunos de sus afluyentes. Actualmente se reconocen dos especies dentro de este género:
Mejía-Rego, David
core   +1 more source

Radiographic Assessment of Bone Maturation: A Tool to Estimate Sexual Maturity in Common Dolphins (Delphinus delphis)?

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT Accurate inference of sexual maturity is fundamental to interpreting marine mammal life histories and population structure. Using Bayesian logistic regression models with a hierarchical ordinal (HOF‐style) parameterisation and canonical analysis of principal coordinates (CAP), we evaluate skeletal metrics in the pectoral flippers of common ...
Eva‐Maria F. Hanninger, Ashley Barratclough, Emma L. Betty, Marti J. Anderson, Matthew R. Perrott, Joy Bowler, Emily I. Palmer, Katharina J. Peters, Karen A. Stockin   +8 more
wiley   +1 more source

Alterações senil-degenerativas e variações anatômicas na coluna vertebral de pequenos cetáceos

Biotemas, 1999
Apresenta-se uma visão comparativa das alterações senil-degenerativas e anomalias anatômicas da coluna vertebral de oito espécies de pequenos cetáceos: Tursiops truncatus (Montagu, 1821); Steno bredanensis (Lesson, 1823); Sotalia fluviatilis guianensis ...
Maria Heloísa B. C. Furtado, Paulo César Simões-Lopes   +1 more
doaj  

Toxoplasmosis in a Guiana dolphin (Sotalia guianensis) from Paraná, Brazil

Veterinary Parasitology, 2013
This study describes toxoplasmosis in a by caught Guiana dolphin (Sotalia guinensis) from Paranaguá Bay, Paraná, Brazil. Interstitial pneumonia, multisystemic arteritis, multifocal adrenalitis and hepatitis were the primary lesions observed. These tissues had moderate to severe necrosis and mononuclear cells infiltration usually surrounded by ...
Gonzáles-Viera, Omar Antonio, Marigo, Juliana, Ruoppolo, Valéria, Weber Rosas, Fernando Cesar, Kanamura, Cristina Takami, Takakura, Cleusa Fumica Hirata, Fernandez, A., Catão-Dias, José Luiz   +7 more
openaire   +4 more sources

Tucuxi and Guiana Dolphin: Sotalia fluviatilis and S. guianensis

, 2009
This chapter explores the two species of the genus Sotalia, riverine Sotalia fluviatilis and marine S. guianensis. The two Sotalia species are very similar in coloration, differing mainly in body size and number of teeth, and somewhat resembling a small ...
Silva, Vera Maria Ferreira da, Vera M.F. Da Silva, Flores, Paulo A.C., Paulo A.C. Flores   +3 more
core   +1 more source

The Franciscana (Pontoporia blainvillei) in the Northern Limit of the FMA II: Strandings and Habitat Use in Ilha Grande Bay

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT The presence of the franciscana (Pontoporia blainvillei) at the northern limit of the FMA II was investigated using a range of methods, including monitoring of strandings, boat surveys, and passive acoustic monitoring (PAM). Franciscana strandings were recorded within the distributional gap between Macaé (22°55′ S) and Ilha Grande (23°09′ S ...
Alexandre F. Azevedo, Rafael R. Carvalho, Karina S. Pereira, Lis Bittencourt, Elitieri B. Santos‐Neto, Lara V. Pereira, Beatriz A. Santos, Gian Berardinelli, Haydée A. Cunha, Tatiana L. Bisi, José Lailson‐Brito Jr.   +10 more
wiley   +1 more source

Etho-ecological study of the Amazon River dolphin, Inia geoffrensis (Cetacea: Iniidae), and the dolphins of the genus Sotalia (Cetacea: Delphinidae) in Guamá River, Amazonia

, 2012
The occurrence of dolphins in the Belém area, northern Brazil, has been poorly surveyed. In addition, there has been much speculation on the identity of cetaceans inhabiting these brackish waters.
Renata Emin-Lima, Martins, Bruna M.L., Gabriel M.A. Dos Santos, Rafael R. Barata, Bruna M.L. Martins, Salvatore Siciliano, Quaresma, Adriano C., Siciliano, Salvatore, Barata, Rafael R., Dos Santos, Gabriel M.A., Adriano C. Quaresma, José de Sousa e Silva, De Sousa E Silva, José, Emin-Lima, Renata, Dos Santos, Gabriel M.A.; id_orcid, Martins, Bruna M. L., Dos Santos, Gabriel M. A.   +16 more
core   +1 more source