Results 31 to 40 of about 44,798 (149)

Respiration Patterns of Southern Right Whale (Eubalaena australis) Mothers and Calves in Southern Brazil

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT Respiration is a key physiological process in cetaceans, closely linked to energy expenditure, behavior, and physiological state. Using drone‐based surveys, we quantified respiration patterns of southern right whale (Eubalaena australis) mother–calf pairs in southern Brazil across two reproductive seasons (2020–2021).
Jéssica Karasek, Daniel Danilewicz, Ticiana Fettermann, Carla Cavassani, Lucas Lima de Oliveira, Yvonnick Le Pendu   +5 more
wiley   +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

Assessing bias in aerial surveys for cetaceans: Results from experiments conducted with the franciscana dolphin

Frontiers in Marine Science, 2022
Line transect aerial surveys are widely used for estimating abundance of biological populations, including threatened species. However, estimates obtained with data collected from aircraft are often underestimated because of visibility bias and bias in ...
Federico Sucunza, Federico Sucunza, Federico Sucunza, Daniel Danilewicz, Daniel Danilewicz, Artur Andriolo, Artur Andriolo, Franciele R. de Castro, Marta Cremer, Pablo Denuncio, Emanuel Ferreira, Paulo A. C. Flores, Paulo H. Ott, Paulo H. Ott, Martin S. Perez, Dan Pretto, Camila M. Sartori, Eduardo R. Secchi, Alexandre N. Zerbini, Alexandre N. Zerbini, Alexandre N. Zerbini, Alexandre N. Zerbini, Alexandre N. Zerbini   +22 more
doaj   +1 more source

From narrow and overlapped to wide and segregated: The isotopic niche of a tropical cetacean community

Ecological Indicators, 2023
Species in sympatry can coexist due to some degree of niche partitioning. Four cetacean species, Guiana (Sotalia guianensis), franciscana (Pontoporia blainvillei), Atlantic spotted (Stenella frontalis), and rough-toothed dolphins (Steno bredanensis ...
M.C. Neves, M. Vannuci-Silva, G. Montanini, A.F. Azevedo, J. Lailson-Brito, T.L. Bisi   +5 more
doaj   +1 more source

Habitat Suitability for a Unique, Fully Marine American Manatee (Trichechus manatus) Population Primarily Depends on Presence of Submarine Freshwater Springs

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT The American manatee (Trichechus manatus) requires freshwater mainly from rivers and springs to maintain osmoregulatory balance in saline environments. However, in Brazil's semi‐arid Potiguar Basin, manatees now rely solely on submarine freshwater springs because hypersaline estuaries have become unsuitable sources of freshwater.
A. C. O. Meirelles, I. C. Normande, M. D. O. Alves, K. F. Choi, V. L. Carvalho, J. C. G. Borges, L. von Fersen, Andrew W. Trites   +7 more
wiley   +1 more source

Guiana dolphin strandings are spatially concentrated and increasing in Brazil

Frontiers in Conservation Science
Guiana dolphins (Sotalia guianensis) serve as critical environmental sentinels, yet they face escalating threats from human activities in coastal and estuarine ecosystems. Despite extensive data collection, integrated assessments of large-scale stranding
Daniel Luis Zanella Kantek, Karen Lucchini, Karen Lucchini, Laena Veloso Dias, Laena Veloso Dias, Layse Albuquerque, Layse Albuquerque, Fábia de Oliveira Luna   +7 more
doaj   +1 more source

TOPOGRAFIA DO CONE MEDULAR NA ARIRANHA (Pteronura brasiliensis Zimmermann, 1780)

Ciência Animal Brasileira, 2009
Com o propósito de disponibilizar dados anatômicos que sirvam de base para a prática das anestesias epidurais, em especial aqueles relativos à topografia do cone medular, foram dissecados três exemplares adultos de ariranha (Pteronura brasiliensis), dois
Gilberto Valente Machado, Fernando César Weber Rosas, Stela Maris Lazzarini   +2 more
doaj   +1 more source

Observações sobre a biologia do gambá (Didelphis marsupialis) na Ilha de Ratones Grande, Estado de Santa Catarina, Brasil

Biotemas, 1996
Neste estudo foram registrados aspectos da biologia de Didelphis marsupialis (Marsupialia, Mammalia) na Ilha de Ratones Grande. A área de estudo localiza-se no Estado de Santa Catarina, no sul do Brasil, sendo a vegetação predominante típica da Floresta ...
Jorge José Cherem, Mauricio Eduardo Graipel, Milton Engel Menezes, Marcio Soldateli   +3 more
doaj  

Vertebrate community composition and activity at giant otter latrines in the northern Pantanal

Ecosphere, Volume 17, Issue 4, April 2026.
Abstract Mustelids and other terrestrial carnivores use communal latrines where feces and urine serve as olfactory cues for territory demarcation and intraspecific communication. These strong scent cues may also influence the broader vertebrate community, either acting as an attractant for species in search of food or as a warning of predator presence.
Evan P. Olden, Charlotte E. Eriksson, Daniel L. Z. Kantek, Selma S. Miyazaki, Manoel dos Santos‐Filho, Claumir C. Muniz, Derick V. S. Campos, Carlos A. Peres, Taal Levi   +8 more
wiley   +1 more source

Mamíferos terrestres não voadores da Ilha de Santa Catarina, sul do Brasil

Biotemas, 2001
Neste trabalho apresenta-se uma lista com alguns comentários sobre os mamíferos terrestres não voadores da Ilha de Santa Catarina (27º10'S - 27º50'S e 48º25'W - 48º35'W, 451 km²).
Maurício E. Graipel, Jorge J. Cherem, Alfredo Ximenez   +2 more
doaj