Navegando por Autor "Ferreira, Vitor Hugo Bessa"

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Enfrentando o estresse: um estudo comportamental e fisiológico em macacos-prego (Sapajus libidinosus) cativos
(2017-03-24) Ferreira, Vitor Hugo Bessa; Ferreira, Renata Gonçalves; ; http://lattes.cnpq.br/6566269393468726; ; http://lattes.cnpq.br/8937441497110208; Coelho, Nicole Leite Galvão; ; http://lattes.cnpq.br/9256395169042054; Pimenta, Olívia de Mendonça Furtado;
Considerar o bem-estar de animais em cativeiro é primordial para cuidar da saúde física e psicológica dos indivíduos. No entanto, apesar de vários indicadores disponíveis (ex. comportamentais, bioquímicos e fisiológicos), a integração de resultados ainda gera dúvidas sobre o real estado de bemestar de um indivíduo. Neste trabalho testamos a hipótese de que a incongruência entre os indicadores de bem-estar ocorre porque os animais, dentro da mesma população, diferem na maneira como se comportam e reagem face aos estímulos. Usamos como modelo macacos-pregos cativos aos cuidados do CETAS de Natal/RN e Cabedelo/PB e do zoológico de João Pessoa/PB. No primeiro capitulo, revisamos diversos conceitos e metodologias do estudo da personalidade animal. No segundo capitulo, definimos os eixos do perfil comportamental (GNB - Comportamento Normativo de Gênero) e de enfrentamento ao estresse (BPIS - Comportamentos Potencialmente Indicativos de Estresse), e o perfil fisiológico (Metabólitos Fecais de Glicocorticóides - MFG) dos animais em condição de estresse crônico de cativeiro. No terceiro capitulo, analisamos se os diferentes tipos comportamentais reagem a um estresse agudo de mudança de recinto. Nossos resultados principais foram: Individuos que locomovem mais exibem BPIS mais rápidos (ex. giro de cabeça), enquanto indivíduos mais inativos exibem BPIS mais estacionarias (ex. autoenganchar). Em ambos os extremos do eixo atividadeinatividade, os animais mostram sinais fisiológicos de baixo grau de bem-estar. Animais mais sociáveis são mais resilientes, tanto a nível fisiológico quanto a nível comportamental aos estresses do cativeiro. Após um estresse agudo, os indivíduos que pontuam positivamente nos eixos Sociabilidade e Exploraçao exibem melhor adaptação ao ambiente novo. Nossos resultados corroboram modelos indicando a existência de diferentes perfis comportamentais que reagem de forma diferente ao estresse e que apresentam perfis fisiológicos. O padrão encontrado assemelha-se ao descrito em outros trabalhos para outras espécies e podem lançar luz sobre a evolução e plasticidade comportamental no reino animal.
Hormonal correlates of behavioural profiles and coping strategies in captive capuchin monkeys (Sapajus libidinosus)
(2018-10) Ferreira, Vitor Hugo Bessa; Silva, Carolina Pereira Cadório da; Fonseca, Elanne de Paiva; Chagas, Ana Cecilia Correia Santos das; Almeida, Raissa Nobrega de; Sousa, Maria Bernardete Cordeiro de; Silva, Hélderes Peregrino Alves da; Galvão-Coelho, Nicole Leite; Ferreira, Renata Gonçalves
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 indicated the existence of four components that characterize the individuals´ Genus Normative Behaviour (GNB) (KMO = 0.531, X2 = 127.672, p < 0.001): ‘Feeding’, ‘Sociability’, ‘Exploration’, and ‘Activity’. Other four components are related to stress coping styles (based on Behaviour Potentially Indicative of Stress – BPIS) (KMO = 0.550, X2 = 329.303, p < 0.001): ‘Self-directed’; ‘Restless’, ‘Ingestion/Self-Scratching’, and ‘Stereotyped’. More active individuals exhibit rapid stress-related behaviours (r = 0.443; p = 0.044) while less active individuals exhibit more stationary stress-related behaviours (r = -0.519; p = 0.013). Akaike information criteria indicated that the best linear regression model to predict the physiological profile (Faecal Glucocorticoid Metabolites - FGM) included three GNB and three BPIS components. ‘Sociability’ (p < 0.05), ‘Exploration’ (p < 0.05), and ‘Ingestion/Self-scratching’ (p < 0.05) predicted lower FGM levels. ‘Activity’ (p < 0.05), ‘Self-directed’ (p < 0.05), and ‘Stereotyped’ (p < 0.05) predicted higher FGM levels. ‘Feeding’ and ‘Restless’ factors were not included in the models. Our results support previous studies indicating that animals within the same population differ in the way they behave and react to stressful conditions, and these are correlated to different physiological profiles. Mapping inter-individual differences in stress coping strategies may help clarify the long-term reported incongruity between behavioural and physiological indicators of welfare in captive animals, supporting better management practices and assisting translational models of the development of psychopathologies.
Personality traits modulate stress responses after enclosure change of captive capuchin monkeys (Sapajus libidinosus)
(Elsevier BV, 2020-09-22) Ferreira, Vitor Hugo Bessa; Fonseca, Elanne De Paiva; Chagas, Ana Cecilia Correia Santos das; Pinheiro, Luiz Guilherme Mesquita; Sousa, Maria Bernardete Cordeiro de; Silva, Hélderes Peregrino Alves da; Galvão-Coelho, Nicole Leite; Ferreira, Renata Gonçalves
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’, ‘Sociability’, ‘Exploration’, and ‘Activity’) differed in their stress responses to an enclosure change. Behavioral data and fecal samples of the individuals were collected for two months before (97 h and 246 fecal samples) and 14 days after the enclosure change (52 h and 666 fecal samples). We used Akaike Information Criteria to select the best linear regression models having personality axes and the period after enclosure change as predictive factors and behaviors potentially indicative of stress (BPIS) and levels of fecal glucocorticoid metabolites (FGM) as the response variables. Best models indicate that specific personality axes acted as a buffer and improved individual stress coping, mainly at the physiological level. More sociable and more active individuals did not show the peak of FGM levels as that exhibited by their less sociable and less active counterparts on the first day of the enclosure change. The link between exploration and resilience to acute stress was less clear: more exploratory individuals showed an increase in FGM levels during the first week of enclosure change, while the less exploratory ones showed a later increase, during the second-week post-enclosure change, suggesting a lesser capacity to recover from stressful stimuli in these individuals. The results presented in this study build on growing literature showing that animals differ in their behavioral profiles and that these differences relate to resilience to environmental disturbances, which may impact individual survival and reproduction, resulting in less genetic diversity of captive colonies and increased issues related to research replicability. We argue that these interindividual differences must be considered in husbandry decisions and during research data collection for the sake of animal welfare and reliable science

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Navegando por Autor "Ferreira, Vitor Hugo Bessa"