Sound the stressor: how Hoatzins (Opisthocomus hoazin) react to ecotourist conversation
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Exposure to ecotourists often disrupts animal behavior, which is known to contribute to heightened mortality rates. In the Amazon, the emblematic, communal nesting Hoatzin (Opisthocomus hoazin) is frequently pursued by tourists eager for close views. Such encounters may cause heightened stress levels, and egg or nestling predation due to decreased parental attendance to nests and nestlings. The effect of reducing conversational tourist noise near wildlife is poorly understood, but represents one potential mechanism of mitigating the impacts of ecotourists on wildlife. In this study, we approached Hoatzins by canoe, playing recorded tourist conversations at different volumes. Both the distances from which we observed Hoatzins becoming agitated (e.g., clucking, defecation, etc.) and flush (e.g., flight or climbing away) were positively correlated with volume. Within 10 weeks Hoatzins began to habituate to silent approaches. Tourist conversations, however, continued to elicit the same heightened disturbance responses throughout data collection. Therefore, to have the best chance of seeing Hoatzins at a short distance and minimizing potentially negative disturbances, ecotourists should cease all conversation. Although not tested, silence is probably the best strategy when looking for many wildlife species.
KeywordsEcotourism Noise Hoatzin Bird Conversation Tropical Flight initiation distance
Agitation initiation distance
Flight initiation distance
We would like to extend our gratitude to Rodolfo Dirzo, Bill Durham, and Rainforest Expeditions for their support and guidance throughout the creation and execution of this study. Additionally, this project would not have been possible without the financial support from the Undergraduate Research Programs and the Latin American Studies departments at Stanford University. For assistance with statistical analysis, we would like to thank Dr. Eduardo Mendoza and Dr. Roger Guevara. Finally, we thank Alexander Markham, Matthew Champoux, Cristin Weekley, and Katy McCown for help in data collection.
- Cairns D (1980) Nesting density, habitat structure and human disturbance as factors in Black Guillemot reproduction. Wilson Bull 92:352–361Google Scholar
- Domínguez-Bello MG et al (1994) Ecology of the folivorous Hoatzin (Opisthocomus hoazin) on the Venezuelan plains. Auk 111:643–651Google Scholar
- Eckhardt G (2000) The effects of ecotourism on Polar Bear behavior. MS Thesis, University of Central FloridaGoogle Scholar
- Ellison LN, Cleary L (1978) Effects of human disturbance on breeding of double-crested cormorants. Auk 95:510–517Google Scholar
- Geist C et al (2005) Does intruder group size and orientation affect flight initiation distance in birds? Anim Biodivers Conserv 28:69–73Google Scholar
- Hidinger L (1996) Measuring the impacts of ecotourism on animal populations: a case study of Tikal National Park, Guatemala. MA Thesis, Duke UniversityGoogle Scholar
- Klein ML (1993) Waterbird behavioral responses to human disturbances. Wildl Soc Bull 21:31–39Google Scholar
- Müllner A (2004) Breeding ecology and related life-history traits of the Hoatzin, Opisthocomus hoazin, in a primary rainforest habitat. Dissertation, Universität WürzburgGoogle Scholar
- Müllner A, Linsenmair E (2007) Nesting behavior and breeding success of Hoatzins. J Field Ornithol 78:352–361Google Scholar