Results 41 to 50 of about 2,683 (203)

Humans are not unique: difficult birth is common in placental mammals

Biological Reviews, EarlyView.
ABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Nicole D. S. Grunstra
wiley   +1 more source

Molecular data highlight hybridization in squirrel monkeys (Saimiri, Cebidae)

Genetics and Molecular Biology
Hybridization has been reported increasingly frequently in recent years, fueling the debate on its role in the evolutionary history of species. Some studies have shown that hybridization is very common in captive New World primates, and hybrid offspring ...
Jeferson Carneiro, Luis Fernando da Silva Rodrigues-Filho, Horacio Schneider, Iracilda Sampaio   +3 more
doaj   +3 more sources

Study of humoral immune response in mammals immunized with Plasmodium falciparum antigenic preparations

Memorias do Instituto Oswaldo Cruz, 1992
Six Plasmodium falciparum protein fractions, isolated under reducing conditions, were used to immunize mice, rabbits and the squirrel monkey Saimiri sciureus. Five or seven subcutaneous injections of each antigenic preparation, in conjunction with Freund'
Antonio B. Cruz Cubas, Flavia Cunha, Isére Kuiatse Nitcheu, Laurence Rolland, Liliane Ciceron, Alexandre B. Carvalho, André F. Furtado, Loic Monjour   +7 more
doaj   +1 more source

Interspecific interactions and welfare implications in mixed species communities of capuchin (sapajus apella) and squirrel monkeys (saimiri sciureus) over 3 years [PDF]

, 2013
Species have complex relationships with others in the wild, and some such as capuchin (Sapajus apella) and squirrel monkeys (Saimiri sciureus) naturally choose to associate with each other.
Griciute, Joana, Buchanan-Smith, Hannah M., Daoudi, Sophia, Hannah M. Buchanan-Smith, Sophia Daoudi, Buchanan-Smith, Hannah M, Whiten, Andrew, Joana Griciute, Rebecca Leonardi, Leonardi, Rebecca, Andrew Whiten   +10 more
core   +1 more source

From armadillos to sloths: Patterns and variations in xenarthran coronary anatomy

The Anatomical Record, Volume 309, Issue 8, Page 2199-2220, August 2026.
Abstract Species of the superorder Xenarthra play a vital ecological role in the Neotropics. Despite their evolutionary significance, anatomical studies on their coronary circulation remain scarce. This study investigated the coronary anatomy of 82 hearts from nine Xenarthra species across the Dasypodidae, Myrmecophagidae, and Bradypodidae.
Wilson Viotto‐Souza, André Luiz Quagliatto Santos, Marcelo Abidu‐Figueiredo, Thaís Aparecida Silva, Rodrigo Ananias Barreiros Silva, Paulo de Souza‐Junior   +5 more
wiley   +1 more source

Primatas do Parque Nacional do Viruá, Roraima, Brasil

Biodiversidade Brasileira, 2018
Este trabalho apresenta o inventário consolidado de primatas do Parque Nacional do Viruá, Roraima, feito a partir da revisão da literatura e consulta ao material tombado nas coleções do Instituto Nacional de Pesquisas da Amazônia e do Museu Paraense ...
Renata Bocorny de Azevedo, Marcos de Souza Fialho, Marcelo Derzi Vidal, Rafael Suertegaray Rossato, Ricardo Sampaio, Fábio Röhe   +5 more
doaj   +3 more sources

Outbreak of Toxoplasmosis Caused by the Brazilian Lineage Type BrII in Black Lion Tamarins (Leontopithecus chrysopygus) Co‐Infected With Leishmania sp.

Journal of Medical Primatology, Volume 55, Issue 3, June 2026.
ABSTRACT Background Toxoplasmosis and leishmaniosis are zoonotic diseases that affect several species of neotropical primates. Methods Three black lion tamarins (Leontopithecus chrysopygus) kept at a Brazilian zoo died due to a superacute disease.
Acauane Sehnem Lima, Daniel Oliveira dos Santos, Clarissa Helena Santana, Lucas dos Reis de Souza, Laice Alves da Silva, Nayara Ferreira de Paula, André Duarte Vieira, Herlandes Penha Tinoco, Carlyle Mendes Coelho, Ayisa Rodrigues de Oliveira, Hilda Fátima Jesus Pena, Renato Lima Santos   +11 more
wiley   +1 more source

Paracoccidioidomycosis (South American Blastomycosis) in a Squirrel Monkey (Saimiri sciureus)

, 1977
A female squirrel monkey (Saimiri sciureus) had granulomatous lesions in the liver and colon. There were many fungal organisms in sections of liver and many of these organisms had multiple buds on their surface.
C. M. Lang, W. D. Johnson
core   +1 more source

Early Detection of Neuroinflammation and White Matter Damage Following Dorsal Spinal Nerve Root Sectioning in a Nonhuman Primate Model

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 2786-2796, May 2026.
ABSTRACT Purpose Dorsal rhizotomy, or spinal dorsal nerve root lesioning, is a surgical procedure used to treat intractable nerve pain by selectively severing sensory afferent nerve roots. This study aimed to evaluate whether multiparametric MRI, including diffusion tensor imaging (DTI), quantitative magnetization transfer (qMT), chemical exchange ...
Feng Wang, John C. Gore, Li Min Chen
wiley   +1 more source

Gestural Sequences in Wild Spider Monkeys (Ateles geoffroyi)

American Journal of Primatology, Volume 88, Issue 4, April 2026.
Geoffroy's spider monkeys produce gestural sequences in the wild, mostly during aggressive, playful and sexual interactions. ABSTRACT To date, research on gestural communication in species other than great apes has been quite limited, especially in their natural habitat, although including a broader range of species in different settings is essential ...
Eva Corral, Sara Cardoso Rodriguez, Katja Liebal, Miquel Llorente, Federica Amici   +4 more
wiley   +1 more source