Results 11 to 20 of about 3,049 (188)

Molecular sexing of tucuxi dolphins (Sotalia guianensis and Sotalia fluviatilis) using samples from biopsy darting and decomposed carcasses [PDF]

Genetics and Molecular Biology, 2007
We tested the zinc-finger sex chromosome-linked genes Zfx/Zfy and the sex-determining region Y (Sry) genes for gender determination of biopsy samples from marine and riverine tucuxi dolphins (Sotalia guianensis and S. fluviatilis).
Haydée A. Cunha, Antonio M. Solé-Cava
doaj   +4 more sources

Reproductive morphology of female Guiana dolphins (Sotalia guianensis) [PDF]

Anais da Academia Brasileira de Ciências, 2015
The reproductive morphology of cetaceans is poorly studied and, despite the large number of strandings, reports on this subject are scarce due to access to carcasses mostly in an advanced state of decomposition.
ESTELLA Z. BECEGATO, JANAINA P. ANDRADE, JULIANA P. GUIMARÃES, JOCIERY E. VERGARA-PARENTE, MARIA ANGELICA MIGLINO, FERNANDA M. DE OLIVEIRA E SILVA   +5 more
doaj   +4 more sources

Osteological alterations in the tucuxi Sotalia fluviatilis (cetacea, delphinidae) [PDF]

Iheringia: Série Zoologia, 2013
We present a description of osteological alterations observed in the tucuxi, Sotalia fluviatilis (Gervais, 1853) from a sample of 43 specimens. Fractures were the most frequent alterations in the sample (16%), occurring in various regions of the skeleton
Daniela de C. Fettuccia, Vera M. F. da Silva, Paulo C. Simões-Lopes   +2 more
doaj   +3 more sources

Feeding habits of Sotalia fluviatilis in the Amazonian Estuary = Hábitos alimentares de Sotalia fluviatilis no estuário amazônico

Acta Scientiarum: Biological Sciences, 2006
In this paper we present an analysis of the fifty S. fluviatilis feeding habits in the Amazonian Estuary. Animals were bycaught by the artisanal fishing fleet between 1996 and 2001.
Sandra Beltrán-Pedreros, Tatyanna Mariucha de Araújo Pantoja   +1 more
doaj   +1 more source

Morfologia da coluna vertebral do botocinza, Sotalia guianensis (Cetacea, Delphinidae)

Biotemas, 2004
Apresenta-se uma descrição da morfologia da coluna do boto-cinza (Sotalia guianenis) (n=34), bem como variações da fórmula vertebral (n=32) (UFSC - Universidade Federal de Santa catarina): Ce 7 , T12 , 1-10_12, Ca23_25 -= 52-56.
Daniela de Castro Fettuccia, Paulo César Simões-Lopes   +1 more
doaj   +1 more source

TAXONOMIC STATUS OF THE GENUSSOTALIA: SPECIES LEVEL RANKING FOR “TUCUXI” (SOTALIA FLUVIATILIS) AND “COSTERO” (SOTALIA GUIANENSIS) DOLPHINS [PDF]

Marine Mammal Science, 2007
AbstractDolphins of the genusSotaliaare found along the Caribbean and Atlantic coasts of Central and South America and in the Amazon River and most of its tributaries. At present, the taxonomy of these dolphins remains unresolved. Although five species were described in the late 1800s, only one species is recognized currently (Sotalia fluviatilis) with
Caballero, S., Trujillo, F., Vianna, J. A., Barrios-Garrido, H., Montiel, M. G., Beltran-Pedreros, S., Marmontel, M., Santos, M. C., Rossi-Santos, M., Santos, F. R., Baker, C. S.   +10 more
openaire   +2 more sources

Electroreception in the Guiana dolphin (Sotalia guianensis) [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2011
Passive electroreception is a widespread sense in fishes and amphibians, but in mammals this sensory ability has previously only been shown in monotremes. While the electroreceptors in fish and amphibians evolved from mechanosensory lateral line organs, those of monotremes are based on cutaneous glands innervated by trigeminal nerves.
Nicole U, Czech-Damal, Alexander, Liebschner, Lars, Miersch, Gertrud, Klauer, Frederike D, Hanke, Christopher, Marshall, Guido, Dehnhardt, Wolf, Hanke   +7 more
openaire   +2 more sources

High-frequency social communication in Sotalia guianensis [PDF]

The Journal of the Acoustical Society of America, 2019
This study aimed to investigate the use of high ultrasonic frequencies (above 40 kHz) in the Sotalia guianensis whistle repertoire. The whistles were classified as high-frequency (HF) whistles and very high-frequency (VHF) whistles. Seven parameters were extracted and a general linear mixed effects model was performed between the total number of ...
Mariana, Barbosa, Lis, Bittencourt, Luciana, G Andrade, Tatiana, L Bisi, José, Lailson-Brito, Alexandre, F Azevedo   +5 more
openaire   +2 more sources

Feeding Strategies of the Guiana Dolphin Sotalia guianensis [PDF]

The Open Marine Biology Journal, 2009
The aim of this study was to characterize the feeding behavior of the Guiana dolphin, S. guianensis, through description and quantification of the strategies used by the dolphins, and possibly to apply this patterns to other areas in its distribution. Data were collected during systematic boat surveys, between November/1996 and May/1997, with 120 hours
Marcos R. Rossi-Santos, Paulo A.C. Flores   +1 more
openaire   +1 more source

Revisão das Informações do Boto-Cinza (Sotalia guinensis) na Costa Brasileira

Metodologias e Aprendizado, 2019
Os cetáceos, como o golfinho Sotalia guianensis (boto-cinza), são animais marinhos cujas populações vem diminuindo devido aos impactos antrópicos em seus ambientes.
Karina Farina, Marcelo Rennó Braga
doaj   +1 more source