Results 71 to 80 of about 7,244 (234)

Melon‐Headed Whale (Peponocephala electra) Occurrence in the Equatorial Mid‐Atlantic Ocean With Descriptions of Their Whistles

Marine Mammal Science, Volume 42, Issue 1, January 2026.
ABSTRACT Acoustic studies for any cetacean species in tropical Atlantic Ocean waters are scarce, especially for oceanic dolphins, such as the melon‐headed whale, Peponocephala electra. Here we describe a unique visual and acoustic record for this species, filling an information gap about the acoustic patterns of these delphinids in this part of the ...
Diana C. Freitas, Manuela Bassoi, Isis V. B. Da Silva, Luane S. Ferreira, Izabela C. Laurentino, Juliana R. Moron, Renata S. Sousa‐Lima   +6 more
wiley   +1 more source

Coordinated feeding behavior of the Guiana dolphin, Sotalia guianensis (Cetacea: Delphinidae), in southeastern Brazil: a comparison between populations

Zoologia (Curitiba), 2013
The coordinated feeding tactics used by delphinids are influenced by differences in the distribution of prey species, season, and opportunities for social learning.
Elaine C. da S. Oliveira, Rodrigo H. Tardin, Fabiana R. Poletto, Sheila M. Simão   +3 more
doaj   +1 more source

A Detailed Characterization of the Whistle Repertoire of Fraser's Dolphins (Lagenodelphis hosei) From the Lesser Antilles

Marine Mammal Science, Volume 42, Issue 1, January 2026.
ABSTRACT Fraser's dolphin (Lagenodelphis hosei) remains poorly studied due to its elusive behavior, rarity, and preference for deep offshore habitats. While dolphins use frequency‐modulated whistles for communication, detailed acoustic descriptions exist for only a few species.
Laura J. May‐Collado, Maia Austin, Lucas Bernier, Jeffrey Bernus, Beth Brady, Lauren Viegas, Eric A. Ramos   +6 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  

Variation of age and total length in Sotalia guianensis (Van Bénéden, 1864) (Cetacea, Delphinidae), on the coast of Espírito Santo state, Brazil

Brazilian Journal of Biology
Variations of age and total length of Sotalia guianensis from the state of Espírito Santo, Brazil, were evaluated. Specimens were found stranded. Age and total length of 44 Guiana dolphins were assessed based on tooth analysis.
J. Y. Lima, A. P. M. Carvalho, C. T. Azevedo, L. A. Barbosa, L. S. Silveira   +4 more
doaj   +1 more source

Lacaziose (doença de Jorge Lobo): revisão e atualização Lacaziosis (Jorge Lobo’s disease): review and update

Anais Brasileiros de Dermatologia, 2007
Lacaziose ou doença de Jorge Lobo é micose crônica, granulomatosa, causada por implantação traumática do fungo Lacazia loboi - patógeno não cultivável até o presente - nos tecidos cutâneo e subcutâneo, manifestando-se clinicamente por lesões nodulares ...
Arival Cardoso de Brito, Juarez Antonio Simões Quaresma   +1 more
doaj   +1 more source

Emerging and recurring diseases in cetaceans worldwide and the role of environmental stressors. Scientific Committee Document SC/60/DW5, International Whaling Commission, June 2008, Santiago, Chile [PDF]

, 2008
Emerging and recurring infectious diseases known or suspected to have the potential to significantly impact cetacean populations, and possible synergistic effects of environmental factors are reviewed.
Aguilar, A., Barrett, T., de Oliveira Santos, M.C., Di Guardo, G., Duignan, P., Jepson, P., Moreno, I., Raga, J.A., Siciliano, S., Siebert, U., Van Bressem, M.-F., Van Waerebeek, K.   +11 more
core  

Whales, dolphins or fishes? The ethnotaxonomy of cetaceans in São Sebastião, Brazil [PDF]

, 2007
The local knowledge of human populations about the natural world has been addressed through ethnobiological studies, especially concerning resources uses and their management. Several criteria, such as morphology, ecology, behavior, utility and salience,
A Begossi, A Begossi, A Begossi, A Begossi, A Begossi, Alpina Begossi, AP Di Beneditto, B Berlin, B Berlin, B Mishler, C Darwin, CB Przbylski, CH Brown, CH Brown, CS Seixas, D Peterson, DT Alarcon, E Hunn, E Hunn, EN Anderson Jr, ER Pianka, F Berkes, F Oliveira, GG Simpson, HC Conklin, Instituto Brasileiro de Geografia Econômica – IBGE, Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais e Renováveis – IBAMA, J Dupré, JA Drew, JGW Marques, JGW Marques, JM Acheson, JS Mourão, JWD Dougherty, K Ruddle, KD Bailey, L Pinheiro, M Ereshefsky, MR Souza, P Martuscelli, R Freitas Netto, RAM Silvano, RAM Silvano, RAM Silvano, RE Johannes, RE Murphy, RG Busnel, RR Reeves, S Atran, S Atran, S Foale, S Siciliano, Shirley P Souza, SP Souza, SP Souza, SP Souza, T Dobzhansky, TA Jefferson, TE Hays, VA Paz, WF Perrin   +60 more
core   +3 more sources

Subcellular Cadmium, Lead and Mercury Compartmentalization in Guiana Dolphins (Sotalia guianensis) From Southeastern Brazil

Frontiers in Marine Science, 2020
Marine mammals are considered excellent ocean health sentinels and are ubiquitously exposed to chemical contaminants worldwide. The Guiana dolphin (Sotalia guianensis) is a near-threatened dolphin species from Brazil with unknown population size data ...
R. Hauser‐Davis, L. Figueiredo, L. Lemos, J. F. de Moura, R. Rocha, T. Saint’Pierre, R. L. Ziolli, S. Siciliano   +7 more
semanticscholar   +1 more source

Herpesviral infection in a Guiana dolphin (Sotalia guianensis) from the northern coast of Brazil

Journal of Veterinary Diagnostic Investigation, 2017
We describe herein herpesvirus-associated genital lesions in a Guiana dolphin ( Sotalia guianensis) from the northern Brazilian coast. Papillary lesions on the vulva, with epithelial hyperplasia, swollen keratinocytes, and intranuclear inclusions, were positive for a herpesvirus ( Gammaherpesvirinae subfamily).
G. C. Seade, V. D. Cerqueira, E. Sierra, J. F. Chaves, M. O. Moura, Daniele P. Montão, G. Riet-Correa, C. A. Oliveira, S. Siciliano, Renata Emin‐Lima, A. Costa, Antonio Fernández, Pedro S. Bezerra Júnior   +12 more
semanticscholar   +4 more sources