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This report describes a new experimental method for measuring fear and anxiety in Cerrado marmosets (Callithrix penicillata). In order to test the sensitivity of the behavioral parameters to an anxiolytic substance, the effects of the benzodiazepine diazepam on the anxiety measures were examined. The strategy was to use a naturally occurring stimulus known(More)
Evolutionary theory and observation predict wider phenotypic variation in hybrids than parental species. Emergent phenotypic novelty in hybrids may in turn drive new adaptations or speciation by breaking parental phenotypic constraints. Primate hybridization is often documented through genetic evidence, but knowledge about the primate hybrid phenotype(More)
Transport in containers and an unfamiliar environment are potent stress-inducing factors in domestic cats. This stress can be evaluated using cortisol concentration in serum and through other related physiological responses, such as increased glycaemia and body temperature. There is evidence that in some animal species, while subjected to psychological(More)
Recent studies have employed tympanic thermometry to assess lateralization of cognitive and emotional functions in primates. However, no studies using this technique have investigated the possibility of hemispheric specialization in New World monkeys. Therefore, the aim of the present study was to investigate tympanic membrane (TM) temperature asymmetries(More)
In the fourth paragraph of the Discussion section, reference #37 and #5 are switched. The paragraph should read as follows: "Although this study did not identify any IS6110 positives, previous studies have identified the presence of this locus in New World primates [5]. However, the IS6110 mobile element has been found to be homologous in some related soil(More)
Animal hybridization is well documented, but evolutionary outcomes and conservation priorities often differ for natural and anthropogenic hybrids. Among primates, an order with many endangered species, the two contexts can be hard to disentangle from one another, which carries important conservation implications. Callithrix marmosets give us a unique(More)
Zoonotic pathogens that cause leprosy (Mycobacterium leprae) and tuberculosis (Mycobacterium tuberculosis complex, MTBC) continue to impact modern human populations. Therefore, methods able to survey mycobacterial infection in potential animal hosts are necessary for proper evaluation of human exposure threats. Here we tested for mycobacterial-specific(More)
Marmosets of the genus Callithrix are specialized in the consumption of tree exudates to obtain essential nutritional resource by boring holes into bark with teeth. However, marmoset preferences for particular tree species, location, type, and other suitable factors that aid in exudate acquisition need further research. In the current study, the intensity(More)
Há equivalência entre a temperatura da membrana timpânica e a temperatura retal em ovinos Santa Inês normotérmicos? RESUMO A utilização do termômetro de raios infravermelhos para a aferição da temperatura timpânica em animais tem se tornado uma alternativa prática na clínica veterinária. Em ovinos, a mensuração da temperatura timpânica não foi(More)
[Comparação entre a temperatura timpânica e a temperatura anal usando um termômetro clínico de raio infravermelho em cães] ABSTRACT A clinical thermometer of infrared rays was used twice to record consecutively the temperature of the tympanic membrane in each ear and in the anus of 53 dogs. Temperatures did not differ significantly between organs, and were(More)
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