Results 91 to 100 of about 6,369 (225)

Cognitive consequences of cooperative breeding in primates? [PDF]

open access: yes, 2018
Several hypotheses propose that cooperative breeding leads to increased cognitive performance, in both nonhuman and human primates, but systematic evidence for such a relationship is missing.
Burkart, Judith, van Schaik, Carel
core  

Polymorphism in Trypomastigotes of Trypanosoma (Megatrypanum) minasense in the blood of experimentally infected squirrel monkey and marmosets

open access: yesMemorias do Instituto Oswaldo Cruz, 1999
Experimental infections by Trypanosoma (Megatrypanum) minasense were performed in primates - Saimiri sciureus and Callithrix penicillata - with the objective of searching for morphological variations of the blood trypomastigotes with respect to hosts and
Mariangela Ziccardi   +1 more
doaj   +1 more source

A rhoptry antigen of Plasmodium falciparum is protective in Saimiri monkeys [PDF]

open access: yes, 2017
A non-polymorphic antigen associated with the rhoptry organelles of Plasmodium falciparum has been purified by immuno-affinity chromatography. The antigen, RAP-1 (rhoptry associated protein-1).
Etlinger, H.   +3 more
core  

Mamirauá:

open access: yesSustentabilidade em Debate, 2014
A presente galeria de fotos e o texto que a acompanha são o resultado da viagem à Reserva de Desenvolvimento Sustentável Mamirauá, realizada pelo fotógrafo e professor da Universidade de Brasília (Veterinária) Marcelo Ismar Santana e pelo professor da ...
José Luiz de Andrade Franco   +1 more
doaj  

Sexual dimorphism in the squirrel monkey, Saimiri sciureus (Linnaeus, 1758) and Saimiri ustus (I. Geoffroy, 1844) (Primates, Cebidae)

open access: yesBrazilian Journal of Biology
Causes and implications of sexual dimorphism have been studied in several different primates using a variety of morphological characters such as body weight, canine length, coat color and ornamentation.
B. Goldschmidt   +8 more
doaj   +1 more source

Comparative histological study of the reinforced area of the saccular membrane in mammals [PDF]

open access: yes
Comparative histological study of reinforced area of saccular membrane in ...
Igarashi, M.
core   +1 more source

Hyperostotic tympanic bone spicules in domestic and wild animal species [PDF]

open access: yes, 2016
Hyperostotic tympanic bone spicules (HTBS), or "mucoperiosteal exostoses" (ME, syn.) are small, globular (>= 1 mm in diameter), mostly stalked and drumstick-like, bony structures, which arise from the inner wall of the tympanic bulla and project into the
Blutke, A   +5 more
core   +2 more sources

The prevalence of Microfilaria spp. in primates of colombian zoos

open access: yesRevista de Medicina Veterinaria, 2007
The prevalence of Microfilaria spp in 266 human and non human primates of Colombian zoos located between 5 and 2850 meters over sea level (mosl) was of 6.39% (17/266).
Rosmery Ladino De La Hortúa   +1 more
doaj   +1 more source

Visible spatial contiguity of social information and reward affects social learning in brown capuchins (Sapajus apella) and children (Homo sapiens) [PDF]

open access: yes, 2017
Animal social learning is typically studied experimentally by the presentation of artificial foraging tasks. Although productive, results are often variable even for the same species. We present and test the hypothesis that one cause of variation is that
Whiten, Andrew, Wood, Lara A.
core   +3 more sources

Geometrical shape discrimination by “Saimiri sciureus” [PDF]

open access: yesPsychonomic Science, 1965
Squirrel monkeys, saimiri sciureus, which had been previously trained on visual acuity determination, were presented with six different pairs of geometric shapes. One of each pair was slightly different from the other member. Four animals in two apparatuses and tested by two different experimenters differentiated the two members of each pair 90 ...
openaire   +2 more sources

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