Results 1 to 10 of about 2,076 (145)

Dental crown morphological variation and heterodonty in carcharhiniform sharks. [PDF]

Anat Rec (Hoboken)
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Zanini F, Soares KDA.
europepmc   +2 more sources

Do Boat Traffic and Habitat Features Shape Habitat Use by Guiana Dolphins (<i>Sotalia guianensis</i>) in a Brazilian Estuary? [PDF]

Ecol Evol
This study investigates how boat traffic and environmental factors shape the spatial distribution and habitat selection of Guiana dolphins in a northeastern Brazilian estuary. Although dolphins and boats overlapped broadly—particularly in deeper waters—dolphins showed a preference for areas with lower boat traffic, greater depths, and proximity to ...
Lima A, Giné GAF, Cruz KTS, Teixeira NN, Strenzel GMR, Le Pendu Y.   +5 more
europepmc   +2 more sources

A new catfish species of Microcambeva Costa & Bockmann, 1994 (Siluriformes: Trichomycteridae) from southern Brazil, with a redescription of M. ribeirae Costa, Lima & Bizerril, 2004. [PDF]

J Fish Biol
Abstract Among the few species of Microcambeva reported as occurring in more than one hydrographic basin, M. ribeirae has been previously listed from both the Ribeira de Iguape and the Guaraqueçaba basins. However, morphological and molecular analyses revealed that the specimens from Guaraqueçaba represent a new species, which is described in this ...
de Medeiros LS, Souto-Santos ICA, Buckup PA, Ferrer J, Reis VJC, de Pinna M, Lima SMQ.   +6 more
europepmc   +2 more sources

Mammal defaunation leads to biotic homogenization of plant communities in tropical rainforests. [PDF]

Ecology
Abstract Biotic homogenization is the process in which species communities become increasingly similar across different regions over time. This phenomenon has substantial ecological, evolutionary, and economic implications, primarily driven by human activities such as habitat destruction, invasive species introduction, and climate change.
Ribas LGDS, Villar N, Zipparro V, Nazareth S, Souza Y, Brocardo CR, Schmaedecke G, Hortenci L, Alves RSC, Galetti M.   +9 more
europepmc   +2 more sources

Distribution and taxonomic identity of the species of Narcine (Toperdiniformes: Narcinidae) in the southwestern Atlantic Ocean. [PDF]

J Fish Biol
Abstract The genus Narcine is the most diverse among electric rays of the order Torpediniformes and is also the only electric ray genus with more than one species occurring in South American waters: Narcine brasiliensis and Narcine bancroftii. The first species has been historically described as distributed from Brazil's southeast coast down to ...
Gonçalves Araújo MV, Rosa RS, Capretz Batista da Silva JP.   +2 more
europepmc   +2 more sources

Present but not detected: new records increase the jaguar's area of occupancy in the coastal Atlantic Forest

Oryx, 2023
The jaguar Panthera onca has lost 85% of its habitat in the Atlantic Forest, where it persists in small and isolated populations in the largest fragments.
Roberto Fusco-Costa, Bianca Ingberman, Gabriel Shimokawa Magezi, Emygdio Leite de Araujo Monteiro-Filho   +3 more
doaj   +1 more source

First documented records of Lugensa brevirostris (Lesson, 1831) and Phoebetria palpebrata (Forster, 1785) for the state of S&atilde;o Paulo, southeastern Brazil (Aves, Procellariiformes) [PDF]

Check List, 2018
The order Procellariiformes comprises mainly oceanic species that are occasionally recorded from along the Brazilian coast. We presents the first records of Lugensa brevirostris (Lesson, 1831) (Kerguelen Petrel) and Phoebetria palpebrata (Forster, 1785) (
Henrique Chupil, Bruna Maldaner, Verônica Marques   +2 more
doaj   +3 more sources

Dating of Sediments by physics methods Electron Paramagnetic Resonance (EPR) in the region of Iguape – Cananéia, Brazil.

Brazilian Journal of Radiation Sciences, 2021
Dating of sediments was used by physics method in this work, in the physics methods the radioactivity is present, but usually it is method based on the storage of energy of radiation in the solid, in which will be employed.
Bruna Cortez
doaj   +1 more source

A new population of the endangered Brachyteles arachnoides (É. Geoffroy, 1806) (Primates: Atelidae) in the state of Paraná, southern Brazil [PDF]

Check List, 2016
The endangered southern muriqui or mono [Brachyteles arachnoides (É. Geoffroy, 1806)], is a primate endemic to the Atlantic Forest of Brazil. One known extant population is found at the southern limit of its distribution, in the state of Paraná, where it
Bianca Ingberman, Nicholas Kaminski, Roberto Fusco-Costa, Emygdio Monteiro-Filho   +3 more
doaj   +3 more sources

New records of Nasitrema atenuatta and Nasitrema globicephalae (Trematoda: Brachycladiidae) Neiland, Rice and Holden, 1970 in delphinids from South Atlantic [PDF]

Check List, 2013
Twenty-one Sotalia guianensis (van Bénéden, 1864) and one Steno bredanensis (Lesson, 1828) stranded on Brazilian coast were necropsied. Two species of Nasitrema (Trematoda: Brachycladiidae) Ozaki, 1935, were identified in the respiratory tract of the ...
Mariana Ebert, Ana Valentere
doaj   +3 more sources