BACKGROUND
Several bird species involved in commercial trade of pets in Brazil, have presented occurrences outside their natural habitat, which may indicate possible introductions due to this activity. In this context we sought to evaluate the factors that influence the public’s interest in wild birds sold as pets in Brazil, and the relationship of those factors with new occurrences of birds outside their natural distribution area, discussing the relationship of commercial trade with possible introductions in new environments.
METHODS
We compiled the richness of bird species traded in Brazil and obtained comparative data of public interest directed to these species through the Google Trend tool. In addition, we gathered data on biological attributes and data on the sale price of the species in the trade, to analyze which factors would be related to public interest. New occurrences of birds outside their natural range were considered only if they were at a minimum distance of 800 km. Thus, factors related to public interest were then used to assess whether there was a relationship with these new occurrences. Data analysis was performed using Mixed Generalized Linear Models (GLMMs).
RESULTS
The results indicated that the public’s interest in certain species varies according to the region of the country, suggesting that the profile of interest in wild birds by people on the internet can be guided by sociocultural factors of each location. In addition, we found that the public interest is greater for songbirds, with generalist diet, which live in more open environments, have a greater distribution area and are sold at lower prices. All those factors, except for the distribution area, also showed to be related to the birds that presented new occurrences.
CONCLUSIONS
The public's preference for birds from more open and more generalist environments is probably the most important data, as such factors generally indicate greater environmental tolerance, which may favor the establishment of these birds in new environments. Thus, actions aimed at the conservation of commercialized species are essential to reduce the interregional trade of species, and consequently reduce the impact on natural populations and reduce the potential for new biological introductions.