Common Marmoset
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Cooperação em sagüis comuns callithrix jacchus: condições e restrições
The cooperative behavior is no longer a dilemma for the theory of evolution, since there are models that explain the evolution of this behavior by means of natural selection at the individual level. However, there have been few studies on the proximal factors that interfere with cooperative behavior. In the study of the influence of cognition on cooperation,
Publicado em: 2010
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2. Caracterização citoarquitetônica, neuroquímica e de aferência óptica do complexo parabraquial do sagui (Callithrix jacchus)
The parabrachial complex (PB) is an area of the brainstem responsible for the processing and transmission of essential physiologic information for the survival of the organisms. This region is subdivided in approximately nine subregions, considering morphology, cytoarchitectural and functional characteristic. Its neurons have an extensive network of connecti
Publicado em: 2010
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3. O complexo nuclear vestibular do sagui (callithrix jacchus): caracterização citoarquitetônica e neuroquímica
Para os vertebrados, manter o equilíbrio corporal contra o campo gravitacional e ser capaz de orientar-se no ambiente são aspectos fundamentais para a sobrevivência, nos quais é essencial a participação do sistema vestibular. Como parte deste sistema, o complexo nuclear vestibular é a primeira estação central que, ao integrar várias informações (
Publicado em: 2010
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4. Resposta comportamental e hormonal de machos não reprodutores de sagüi, callithrix jacchus, a estímulos sensoriais de filhotes não aparentados
Parental care in mammals is influenced by somatosensory stimuli from infants, such as vocalization and sight and by changes in the hormone levels of caretakers. The aim of this study was to evaluate the behavioral and hormonal responses of twelve non reproductive adult male common marmosets (Callithrix jacchus) to infant cues, vocalization recordings, sight
Publicado em: 2009
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5. Expressão de genes imediatos induzidos por vocalizações em sagüis-comuns (Callithrix jacchus)
Immediate-early genes (IEGs) expression has been widely used as a valuable tool to investigate brain areas activated by specific stimuli. Studies of natural vocalizations, specially in songbirds, have largely benefited from this tool. Here we used IEGs expression to investigate brain areas activated by the hearing of conspecific common marmoset (Callithrix j
Publicado em: 2008
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6. Centros rombencefálicos de processamento auditivo do sagui (Callithrix jacchus): uma análise citoarquitetônica e neuroquímica
The auditory system is composed by a set of relays from the outer ear to the cerebral cortex. In mammals, the central auditory system is composed by cochlear nuclei, superior olivary complex, inferior colliculus and medial geniculate body. In this study, the auditory rombencephalic centers, the cochlear nuclear complex and the superior olivary complex were e
Publicado em: 2008
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7. Caracterização do ritmo de atividade motora durante a puberdade em sagüis (Callithrix jacchus) sob condições semi-naturais
Most of ontogenetic studies on circadian timing system have been developed on infants, adults and elderly. The puberty has not been a stage of life few studied, except for researches in human adolescents, that presents phase delay in sleep-wake cycle. However, few studies have focused on the basis of this circadian change due to methodological diffic
Publicado em: 2008
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8. Colheita, análise e criopreservação de sêmen de uma espécie modelo de primata neotropical, Sagui-de-Tufo-Branco (Callithrix jacchus) / Collection, analysis and cryopreservation of semen from a model species, the common marmoset (Callithrix jacchus)
The Callithrix jacchus can be used as a model species for other Neotropical primates species, mainly Callithriquids, for reproductive studies. Semen samples were collected with the following objectives: to improve the penile vibrostimulation technique, validate sperm evaluation techniques for field work, analyse the semen characteristics from animals at 2 co
Publicado em: 2007
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9. Ãrea domiciliar e utilizaÃÃo de recursos alimentares por sagÃis Callithrix jacchus na Reserva Particular do PatrimÃnio Natural â RPPN Nossa Senhora do Outeiro de MaracaÃpe, Ipojuca, PE
Two groups of common marmoset, Callithrix jacchus (A and B), were monitored between May and November 2006 in a Restinga (a coastal ecosystem of the Atlantic Forest) private reserve in the municipality of Ipojuca, state of Pernambuco, NorthEast of Brazil (08031â48ââS 35001â05ââW, at the sea level). The main objective was to analyze the diet composition
Publicado em: 2007
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10. Density, proportion, and dendritic coverage of retinal ganglion cells of the common marmoset (Callithrix jacchus jacchus)
We performed a quantitative analysis of M and P cell mosaics of the common-marmoset retina. Ganglion cells were labeled retrogradely from optic nerve deposits of Biocytin. The labeling was visualized using horseradish peroxidase (HRP) histochemistry and 3-3'diaminobenzidine as chromogen. M and P cells were morphologically similar to those found in Old- and N
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-06
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11. Fecal androgen levels in common marmoset (Callithrix jacchus) males living in captive family groups
In captive common marmoset groups, the reproductive inhibition observed in subordinate female seems to be a result of olfactory, visual and behavioral cues from the dominant female. However, few studies have examined the relationship among adult males living in the same social group. These studies have shown that reproductive failure among peer males seems t
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-01
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12. Comunidade de mamiferos não-voadores de um fragmento de floresta Atlantica semidecidua do municipio de Campinas, SP
The population richness, composition, abundance and density of non-volant mammals of mata Ribeirão Cachoeira forest, a 230 ha semideciduous forest fragment in the outskirts of Campinas, São Paulo, were studied between 2001 and 2003. The main objective was to evaluate the importance of this forest fragment to the local and regional conservation of the nativ
Publicado em: 2005