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, X 2 = 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, X 2 = 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.
RESUMOObjetivo: Descrever e correlacionar os aspectos envolvidos com a percepção de fadiga e estresse laboral e percebido em trabalhadores de ambos os sexos, em função do setor de trabalho e traço de ansiedade.
ABSTRACTObjective: To describe and to correlate aspects involved in the perception of both fatigue and stress (perceived and job stress), in footwear industry workers, in function of subjects' anxiety trait, gender and class of work. Methods: Forty six footwear industry workers were evaluated by instruments as follows: Inventory State-Trait Anxiety (STAI), Yoshitake Fatigue Questionnaire, Work Stress Scale. Visual Analogue Scale (VAS) was used to register the subjects' perceived stress. The data were analyzed by Student's t test and Pearson's correlation test, being considered, p ≤ 0,05 for all tests. Results: No significant differences in fatigue perception, anxiety trait, perceived and job stress were observed between sexes or work
No significant change in mean values (n = 5; 5 males/5 females) (GLM: F = 2.17, p = 0.12) Unconfirmed No male-female response to mate b.2. Social aggression/rank dispute/mate competition-New group formation No significant change in mean values (Groups: n = 2; 4 males/4 females) (Student's t-test, p > 0.05) Unconfirmed No male-female response to mating access (at low levels of competition) M.B.C.d. Sousa et al. General and Comparative Endocrinology xxx (xxxx) xxx-xxx
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