Cracking nuts with tools is a behavior documented in small number of populations tufted capuchins, mainly semi‐arid Caatinga and Caatinga–Cerrado transitional environments northeastern Brazil. Only one these inhabits the less arid Cerrado Central Brazil, where are composed heterogeneous mosaic fields, savannas forest formations. We conducted surveys 10 20 localities nutcracking by capuchins was reported local inhabitants Cerrrado Northern Goiás Tocantins. Our purpose to evaluate sites...

Perceived vocal attractiveness and measured sex-dimorphic parameters are both associated with underlying individual qualities. Research tends to focus on speech but singing is another highly evolved communication system that has distinct universal features analogues in other species, it relevant mating. Both speaking voice provides information about its producer. We tested whether function as 'backup signals' indicate similar Using a sample of 81 men 86 women from Brazil the Czech Republic,...

Abstract The progressive growth of urban environments has increasingly forced populations nonhuman primates to coexist with humans in many cities, which resulted problems such as behavioral alterations, conflicts humans, and threats the health monkeys, due their consumption anthropogenic foodstuffs. These foods, are rich calories, principal driver proximity between primates, even though acquisition these foods tends be risky for monkeys involve a variety challenges derived from specific...

O fenômeno conhecido como school shooting vem chamando a atenção do mundo, principalmente após tragédia na Columbine High School, cidade de Littleton, Colorado, nos Estados Unidos, em 1999. Posteriormente, abril 2007, o estudante Cho Seung-Hui protagonizou um massacre proporções ainda maiores ao atirar contra estudantes Virginia Polytechnic Institute and State University, matando 32 pessoas e se suicidando final. presente artigo reflete sobre para sua expansão pelo mundo traz uma reflexão,...

We investigated whether sex differences in spatial dynamics correlate with rates of staccato and neigh vocalizations northern muriquis (Brachyteles hypoxanthus) at the Reserva Particular do Patrimônio Natural-Feliciano Miguel Abdala, Minas Gerais, Brazil. A total 2,727 10 min focal subject samples were collected on 32 adult females 31 males between April 2007 March 2008. Compared males, spent a significantly lower proportion their time proximity to other group members gave staccatos higher...

Investigamos a relação entre fatores de aprendizagem social, acessados via questionários, e os comportamentos agressivos lúdicos meninos pré-escolares, através observação direta durante o recreio. Os participantes foram 15 com idades quatro seis anos, da cidade Goiânia, GO, Brasil. Uma análise multivariada variância indicou efeitos significativos modelos agressividade em casa nas taxas agressão brincar. Crianças expostas punições físicas abusivas, brigas adultos programas violentos TV...

Sequential exchanges of vocalizations (staccatos and neighs) emitted by Northern Muriquis Brachyteles arachnoides hypoxanthus were recorded at the Biological Station Caratinga, Minas Gerais State, Brazil. Staccatos neighs containing larger proportion short elements preferentially produced during short-range exchanges; neighs, a number participants, typical long-range exchanges. animals feeding in dispersed manner contained tonal than those muriquis cohesive manner. seem thus to be...

The objective of the present study consisted describing dam and calf suckling behaviour Curraleiro Pé Duro cattle. In this study, 38 mother-offspring pairs one mother-offspring-orphan trio were observed for 10 hours daily during three consecutive days spaced every four months over a period year. After identification, animals under field conditions where posture number episodes (NS), mean duration (MSD), total per day (TSD) as well natural weaning these recorded. model assessed effects sex...

Vocal communication is an essential aspect of primate social behaviour. The bearded capuchin Sapajus libidinosus endemic to Brazil, and some studies have described specific vocalisation types for this species; however, there still no complete description its vocal repertoire. Thus, study aimed describe the repertoire a group S. living in Parque Nacional de Brasília, protected area Cerrado Central Brazil. We carried out focal samplings recording vocalisations members troop different...

Intergroup conflicts are energetically more costly than intra-group disputes, and thus typically occur in contexts which the energetic returns relatively high. In anthropogenic environments, provisioned resources tend to be rich energy highly agglomerated. While females expected defend resources, adult males, turn, females. Based on this premise, present study focused an urban forest city of Goiânia (Goiás, Brazil), is inhabited by two groups bearded capuchins. Behavioral data were collected...

RESUMO Testamos o efeito de um aparato que pudesse induzir uso ferramentas no comportamento seis macacos-prego cativos. Utilizamos “animal focal” para tempo gasto em estados comportamentais gerais e indicativos estresse, concomitantemente com “todas as ocorrências” eventos agonísticos comportamentos estereotipados. O grupo mostrou perfis orçamento atividades diversificados, respostas variadas aos fatores estressantes a estavam expostos. Alguns indivíduos reduziram alguns porém não houve...

ABSTRACT The availability of manmade foodstuffs in the environment may significantly alter diets, behavior and health wild animals ecosystems ecology. One principal problems faced by urban populations capuchin monkeys is their contact with household refuse, which provoke a number impacts on these animals. present study tested use feeding platforms as strategy to reduce consumption unhealthy analyzed influence this measure activity patterns social interactions groups. For this, we verified...

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