Results 81 to 90 of about 13,633 (199)

Lateralized behavior in Guiana dolphins, Sotalia guianensis, at Pipa Beach, RN, Brazil [PDF]

Brazilian Journal of Biology, 2013
T. Casagrande, VO. Lunardi, DG. Lunardi
doaj   +6 more sources

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

Ethnoecology of sotalia guianensis (gervais, 1853) in the Amazon estuar

, 2022
This chapter describes a study conducted on the ecology of Sotalia guianensis in the Amazon estuary from 1999 to 2001, using participatory research with methodology. Interviews of 150 fishermen across 11 towns as well as surveys of the estuary by boat were completed to obtain information regarding S.
Beltrán-Pedreros, Sandra, Petrere, Miguel, Filgueiras-Henriques, Ligia Amaral   +2 more
openaire   +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

Metal(loid) Concentrations in Coastal (Sotalia guianensis) and Oceanic (Pseudorca crassidens) Odontocete Cetaceans Stranded Along the Northeastern Brazilian Equatorial Margin

Biological Trace Element Research
Cetaceans face multiple threats, and pollution has become a major concern for their conservation worldwide. This study assessed metal(loid) concentrations in the tissues of two odontocete species with coastal and oceanic habits, namely Guiana dolphin ...
Rysónely Maclay de Oliveira, R. E. M. de Oliveira, R. Hauser-Davis, F. Attademo, J. Brito, Bárbara Manhães Moura Reis, Ana Bernadete Lima Fragoso, Flávio José de Lima Silva   +7 more
semanticscholar   +1 more source

ETHNOECOLOGY OF SOTALIA GUIANENSIS (GERVAIS, 1853) IN THE AMAZON ESTUARY

, 2023
This chapter describes a study conducted on the ecology of Sotalia guianensis in the Amazon estuary from 1999 to 2001, using participatory research with methodology. Interviews of 150 fishermen across 11 towns as well as surveys of the estuary by boat were completed to obtain information regarding S.
Beltran-Pedreros, Sandra, Petrere, Miguel, Filgueiras-Henriques, Ligia Amaral, RuizGarcia, M., Shostell, J. M.   +4 more
openaire   +1 more source

Shifting Seas, Changing Diets: Evidence of Temporal Dietary Shifts in Marine Megafauna in Southern Brazil (2017–2023)

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Understanding the dietary dynamics of marine megafauna is essential for interpreting ecological interactions and assessing environmental changes in marine ecosystems. We analysed temporal trends in the diets of eight megafaunal species, comprising marine mammals, seabirds, and sea turtles.
Joao Bosco Gusmao, Mario Roberto Castro Meira‐Filho, Camila Domit   +2 more
wiley   +1 more source

Behavioral alterations in the gray dolphin Sotalia guianensis (Gervais, 1953) caused by sea traffi [PDF]

Biotemas, 2006
Behavioral responses by Sotalia guianensis dolphins in the presence of touristic sea traffic in the bay of Curral, Pipa-RN, Brazil, were measured. The dolphins changed their behavior when boats were closer than 100 meters. The main behavioral alterations
Francielli Cristine Cunha Melo, Anderson Luis do Valle   +1 more
doaj  

Molecular Identification and Historic Demography of the Marine Tucuxi (Sotalia guianensis) at the Amazon River’s Mouth by Means of Mitochondrial Control Region Gene Sequences and Implications for Conservation

Diversity, 2013
In 2005, three fishermen, with artisan fishing vessels and drift gillnets, accidentally captured around 200 dolphins between Vigia and Salinópolis in the Amazon River estuary. The dolphins died and they then prepared their vaginas and penises in order to
Joseph Mark Shostell, Daniela Tejada-Martínez, Pablo Escobar-Armel, David Mejia, Manuel Ruiz-García   +4 more
doaj   +1 more source

From Natural to Human‐Dominated Seascapes: Habitat Loss for Guiana Dolphins Over Two Decades

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Changes in natural environments, such as coastal and marine zones, caused by human activities impact the quality of habitats and their inhabitants, ultimately jeopardising species conservation. As human activity is ever‐increasing, it is imperative to understand how multiple stressors, such as shipping, fisheries and pollution, affect marine ...
Mariana Leêne Santana Barros de Leal, Tomaz Cezimbra, Guilherme Maricato, Israel S. Maciel, Rodrigo H. Tardin   +4 more
wiley   +1 more source