Renata Gonçalves Ferreira

• PhD
• Federal University of Rio Grande do Norte

Husbandry procedures may cause behavioral and physiological changes to animals living in captivity. However, an individual´s reaction is not uniform and may be related to different coping strategies. In this study, we analyzed whether and how 12 adult captive capuchin monkeys (Sapajus libidinosus) varying in four personality axes (‘Feeding’, ‘Socia...

In this study, we tested the hypothesis that individual differences in behavioural profiles correlate to differences in stress-related behaviours and hormonal levels in captive brown capuchin monkeys (Sapajus libidinosus). Based on a sample of 25 animals, 143 h of behavioural data collection and 518 faecal samples, principal component analyses indi...

Mangroves have been suggested as refuges for primates that may experience habitat loss and illegal hunting in terra firme forests. The northern coast of Brazil is considered one of the largest mangrove extensions in the world and may have many primate species yet to be reported in this habitat. In this chapter we focus on surveys of capuchin monkey...

In this book (Phylogeny, Molecular Population Genetics, Evolutionary Biology and Conservation of the Neotropical Primates), the authors present new research findings from sixty of the world’s leading Neotropical primate scientists in order to bridge this information gap. Specifically, the authors provide up-to-date biological, molecular, conservati...

Studies on diverse species indicate the existence of individual differences in stress coping strategies labelled as ‘proactive’ and ‘reactive’. Identifying taxonomic distribution of such coping strategies is fundamental to evolutionary models and to management of captive animals. Capuchin monkeys (Sapajus spp.) are neotropical primates noted for th...

Page 237

page 238

The "Capuchin research community roundtable: working together towards a comparative biology of Cebus and Sapajus" was held at the International Primatological Society Congress in Cancún, Mexico, August 2012. Goals of the roundtable were to strengthen interactions among the capuchin research community, and to prioritize and coordinate research and t...

Fission-fusion dynamics seem to reflect individual decisions as well as temporal and spatial variations in the organization of groups of the same species. To understand the group dynamics of the Guiana dolphin, Sotalia guianensis, at Pipa Bay, Brazil, we investigated the three dimensions of a fission-fusion social system: (1) variation in spatial c...

Analysis of behavioral sequences displayed by different individuals can be used to infer individual decisions under diverse conditions. This study investigates whether behavioral transitions and routines differ according to the group composition of Guiana dolphins (Sotalia guianensis). We used the Z-score binomial test to detect significant behavio...

Capuchins (Cebus libidinosus) occupy areas of Caatinga in northeast Brazil. They consume the nuts of several species of difficult-to-open fruits (two species of Palmae and one species of Euphorbiacea) and are reported to use stones as hammers to crack open the nuts. This article describes the weight of hammers found on anvils and presumably used fo...

Advantages of social life relate to protection from predators and foraging efficiency. Disadvantages relate to the need to synchronise one's own activity with that of others. The analysis which activity is facilitated or detracted in social groups offers an indication of the benefits and costs of a solitary or social life, and the pressures individ...

Cebus flavius is a recently rediscovered species and a candidate for the 25 most endangered primate species list. It was hypothesized that the distribution of C. flavius was limited to the Atlantic Forest, while the occurrence of C. libidinosus in the Rio Grande do Norte (RN) Caatinga was inferred, given its occurrence in neighboring states. As a r...

Dolphin/whale watching activity represents the major source of income to many local communities, however many studies describe negative effects of this activity on animals’ normal behavior. In this paper we describe a behavioral analysis of estuarine dolphins (Sotalia guianensis), proximity pattern and breathing synchrony during the first year afte...

Intervals between sampling are a major concern in studies of behaviour. Objective choices compromise accurate definition, collection of enough data and avoidance of time dependence between samples. This paper tests whether significant differences occur in the proportion of activities of Sotalia guianensis when the protocols of observation using dif...

Abstract

The competitive regime faced by individuals is fundamental to modelling the evolution of social organization. In this paper, we assess the relative importance of contest and scramble food competition on the social dynamics of a provisioned semi-free-ranging Cebus apella group (n = 18). Individuals competed directly for provisioned and clumped foods...

RESUMO Modelos teóricos oriundos da socioecologia baseiam-se na hipótese de que a socialidade dos primatas tem como fatores causais as características ecológicas do ambiente: (a) o risco de predação que determina o tamanho e a coesão dos grupos e (b) a disponibilidade e distribuição das fontes alimentares que determina o padrão de relações entre as...

The "social intelligence" hypothesis proposes that intelligence evolved as a consequence of the need for behavioral maneuvering to deal with the complexities of social life. As a result, coalitions have received considerable attention. Here we present the patterns of coalitionary behavior observed in a semifree-ranging group of Cebus apella and exp...

Methods to describe dominance hierarchies are a key tool in primatology studies. Most current methods are appropriate for analyzing linear and near-linear hierarchies; however, more complex structures are common in primate groups. We propose a method termed "dominance-directed tree." This method is based on graph theory and set theory to analyze do...