Impacts of food-based enrichment on behaviour and physiology of male greater rheas (Rhea Americana, Rheidae, Aves)

  • Márcia Fontes Figueiredo Lima, Miss Universidade Federal de Ouro Preto (UFOP), Instituto de Ciências Exatas e Biológicas (ICEB), Departamento de Biodiversidade, Evolução e Meio Ambiente (DEBIO), Laboratório de Zoologia dos Vertebrados - Ouro Preto, MG, Brasil. http://orcid.org/0000-0003-1205-3735
  • Cristiano Schetini de Azevedo Universidade Federal de Ouro Preto (UFOP), Instituto de Ciências Exatas e Biológicas (ICEB), Departamento de Biodiversidade, Evolução e Meio Ambiente (DEBIO), Laboratório de Zoologia dos Vertebrados - Ouro Preto, MG, Brasil. http://orcid.org/0000-0003-0256-9017
  • Robert John Young University of Salford, Manchester - Manchester, United Kingdom. http://orcid.org/0000-0002-8407-2348
  • Priscila Viau Universidade de São Paulo (USP), Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Hospital Veterinário (HOVET), Laboratório de Dosagens Hormonais (LDH) - São Paulo, SP, Brasil. http://orcid.org/0000-0002-5138-3676
Keywords: Abnormal behaviours, Environmental enrichment, Rhea, Stress, Zoo animal welfare

Abstract

Distress can be defined as a biological response of an individual to long-term threats to its homeostasis and it should be avoided from an animal welfare perspective. High levels of stress hormones and the expression of abnormal behaviours are responses normally observed in distressed animals. Captive environments can provoke distress, especially when inappropriate stimuli are provided to the animals. The concomitant use of behavioural and non-invasive hormonal measures is a means to evaluate captive animal welfare. Environmental enrichment is a tool that can reduce distress and minimize the expression of abnormal behaviour in captive animals. The aim of this study was to evaluate greater rheas’ responses (behavioral and hormonal) to food-based enrichment. Three birds from the Belo Horizonte Zoo, Brazil were studied. The study was divided into three phases (baseline, enrichment and post-enrichment): fruits scattered around the birds’ enclosure were used as enrichment. Behaviour and faecal sampling were undertaken in all phases of the study. Abnormal behaviours and faecal glucocorticoid metabolites (GCM) levels showed significant reduction during the environmental enrichment phase, and a significative positive correlation between GCM production and abnormal pacing was observed. From the results of this study, we conclude that the use of food as environmental enrichment should be encouraged because of its positive effects on animal welfare. Besides, studies with larger groups of greater rheas, with individuals of both sexes, should also be encouraged to evaluate if the results found in this pilot study are consistent and can be generalized to the species.

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Author Biographies

Márcia Fontes Figueiredo Lima, Miss, Universidade Federal de Ouro Preto (UFOP), Instituto de Ciências Exatas e Biológicas (ICEB), Departamento de Biodiversidade, Evolução e Meio Ambiente (DEBIO), Laboratório de Zoologia dos Vertebrados - Ouro Preto, MG, Brasil.

Rua Diogo de Vasconcelos, 122, Pilar, CEP 35400-000, Ouro Preto, MG, Brasil.

Cristiano Schetini de Azevedo, Universidade Federal de Ouro Preto (UFOP), Instituto de Ciências Exatas e Biológicas (ICEB), Departamento de Biodiversidade, Evolução e Meio Ambiente (DEBIO), Laboratório de Zoologia dos Vertebrados - Ouro Preto, MG, Brasil.

Rua Diogo de Vasconcelos, 122, Pilar, CEP 35400-000, Ouro Preto, MG, Brasil.

Robert John Young, University of Salford, Manchester - Manchester, United Kingdom.

Peel Building, Room G21, Salford, M5 4WT, Manchester, United Kingdom.

Priscila Viau, Universidade de São Paulo (USP), Faculdade de Medicina Veterinária e Zootecnia (FMVZ), Hospital Veterinário (HOVET), Laboratório de Dosagens Hormonais (LDH) - São Paulo, SP, Brasil.

Rua Professor Orlando Marques Paiva, 87, Butantã, CEP 05508-270, São Paulo, SP, Brasil.

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Published
2019-04-03
How to Cite
Lima, M., Azevedo, C., Young, R., & Viau, P. (2019). Impacts of food-based enrichment on behaviour and physiology of male greater rheas (Rhea Americana, Rheidae, Aves). Papéis Avulsos De Zoologia, 59, e20195911. https://doi.org/10.11606/1807-0205/2019.59.11
Section
Original Article