Results 41 to 50 of about 13,633 (199)

Acoustic parameters of sounds emitted by Sotalia guianensis : dialects or acoustic plasticity [PDF]

Journal of Mammalogy, 2015
AbstractSelective pressure from the environment on species may select adaptations as a whole, including the specific context of acoustics. Some authors report that the acoustic repertoire of Sotalia guianensis presents dialects as a geographical reflection. However, others propose that the environmental characteristics are the factor that imposes these
Flávio J. L. Silva, Emygdio L. A. Monteiro-Filho, Dalila T. Leão   +2 more
openaire   +1 more source

Morfologia do aparato hióide de algumas espécies de odontocetos do sul do Brasil

Biotemas, 2009
O aparato hióide dos odontocetos serve como principal ponto de fixação de músculos e ligamentos que subsidiam a respiração, a produção de sons e a alimentação.
Dan Jacobs Pretto, Gabriela Oliveira, Maurício Eduardo Graipel, Paulo César Simões-Lopes   +3 more
doaj   +1 more source

Perspectives and limitations regarding participatory monitoring of cetaceans: Use of a Platform of Opportunities approach by the tourism industry at the Anhatomirim Environmental Protection Area

Desenvolvimento e Meio Ambiente, 2023
O crescente avanço das populações humanas sobre as áreas costeiras coloca em risco a biodiversidade associada aos ecossistemas locais. Dentre as atividades antrópicas exercidas nessas regiões, o ecoturismo, com destaque aquele associado à observação de ...
Eduardo Maciel Osorio Freitas, Heitor Schulz Macedo   +1 more
doaj   +1 more source

Anomalias ósseas congênitas em Sotalia guianensis (Mammalia, Cetacea, Delphinidae) da costa centro-norte do Estado do Rio de Janeiro Congenital bone defects in Guiana dolphin, Sotalia guianensis (Mammalia, Cetacea, Delphinidae) in the northcentral coast of Rio de Janeiro State, Brazil

Pesquisa Veterinária Brasileira, 2010
Carcaças de botos-cinza Sotalia guianensis (van Bénéden, 1864) foram recuperadas entre 20 de agosto de 2001 e 13 de fevereiro de 2006, na costa centro-norte fluminense. A maior parte delas (85%) entre Barra de São João (22º35'S 41º59'W) e Quissamã (22º06'
Maíra Laeta, Sheila M.F.M. Souza, Salvatore Siciliano   +2 more
doaj   +1 more source

Employing Local Ecological Knowledge to reveal interactions between artisanal fishers and Guiana Dolphins (Sotalia guianensis) along the Maranhão coast, northern Brazil

Ethnobiology and Conservation
The Guiana dolphin (Sotalia guianensis) is a cetacean found in tropical coastal waters of the Western Atlantic, distributed from Honduras to northern Santa Catarina, Brazil.
Carlos Henrique Marinho dos Santos Filgueira, M. D. Vidal, R. Hauser-Davis, Salvatore Siciliano   +3 more
semanticscholar   +1 more source

First record of sharksucker Echeneis naucrates (Perciformes, Echeneidae) associated with a young Guiana dolphin Sotalia guianensis (Cetartiodactyla, Delphinidae) in north-eastern Brazil

Journal of the Marine Biological Association of the United Kingdom, 2022
Suckerfish attached to dolphin species have been extensively reported worldwide, yet such association has been rarely seen in the tropical and shallow waters of South America.
L. R. A. Souto, Thais Ester Wolff Ross, C. L. Sampaio, Maria Do Socorro Santos dos Reis, G. Bortolotto   +4 more
semanticscholar   +1 more source

SOTALIA GUIANENSIS POPULATION DENSITY ESTIMATIVE IN THE BAY OF ANTONINA, BRAZIL

Revista Acadêmica Ciência Animal, 2012
The present work aimed to estimate the population density of Sotalia guianensis in the Bay of Antonina, southern Brazilian coast, by linear transects, distance method. The average group size in the total area was 2.57 individuals/group. The study area is 28.1 km2 and it was divided in two sub-areas, an outer area closer to the sea and another more ...
Anne Karoline Japp, Gislaine De Fatima Filla   +1 more
openaire   +1 more source

Occupation pattern of a harbor inlet by the estuarine dolphin, Sotalia guianensis (P. J. Van Bénéden, 1864) (Cetacea, Delphinidae)

Brazilian Archives of Biology and Technology, 2009
The occupation pattern of Sotalia guianensis in São Francisco do Sul harbor inlet, in Babitonga bay, southern Brazil, was studied between September 1996 and June 1998.
Marta Jussara Cremer, Paulo César Simões-Lopes, José Salatiel Rodrigues Pires   +2 more
doaj   +1 more source

Guiana Dolphin (Sotalia guianensis) acoustic behavior differs under different noise conditions

Journal of Mammalogy
Coastal environments are essential habitats for small dolphins but are increasingly affected by urban development, with underwater noise pollution posing significant threats.
Daiane S Marcondes, Camilla Domit, M. Cantor   +2 more
semanticscholar   +1 more source

Estimating Three‐Dimensional Posture to Correct Drone‐Based Measurements of Free‐Swimming Marine Mammals: An Application to Dugongs in Shallow Waters

Ecology and Evolution, Volume 16, Issue 10, October 2026.
Drone‐based measurements of free‐ranging aquatic wildlife are inevitably affected by posture variations, yet this issue has remained largely unaddressed. We developed a drone‐based method of estimating body measurements of dugongs using dual drones (positioned vertically and obliquely relative to the animal) whilst considering body posture.
Chiaki Yamato, Helen L. Sneath, Janet M. Lanyon   +2 more
wiley   +1 more source