Abstract
The number of reports of tick parasitism in amphibians and reptiles has increased over the past few years, including new host and location records for Amblyomma rotundatum and Amblyomma dissimile. However, knowledge of the geographical distribution remains incomplete, and in many regions of Brazil, the presence of these vectors has not been investigated. Several candidate models were built using a correlative maximum entropy approach, and best-fitting models were selected based on statistical significance, predictive ability, and complexity based on current climatic trends and future projected climate changes. Final models showed a good ability to discriminate A. rotundatum and A. dissimile current and future potential distributions. The entire country had higher predicted suitability for A. rotundatum while A. dissimile was mainly restricted to the Amazon and Pantanal biomes. A. rotundatum is a species with enormous potential for dissemination in the next decades, potentially through the legal and illegal transport of reptiles and amphibians. The proposed model is useful for targeting surveillance efforts increasing the efficiency and accuracy of future ecological research and tick management efforts.


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Acknowledgments
We thank the curators of the tick collection “Coleção Nacional de Carrapatos Danilo Gonçalves Saraiva” (CNC) of the FMVZ-USP and “Coleção Acarológica do Instituto Butantan” (IBSP)—Butantan Institute of São Paulo. Special thanks to Prof. Townsend Peterson for his meaningful remarks to improve this work.
Funding
This study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). ALR has a doctoral scholarship (CNPq #153423/2016-1 and CAPES PDSE #88881.362065/2019-01).
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Figure 1S (Supplementary Material) - Geographic summary of the results of the analyses performed for A. rotundatum and A. dissimile under the Model for Interdisciplinary Research on Climate (MIROC5). Logistic output of the final models that met the selection criteria, transferred to future scnesarios. Area in gray represent strict model extrapolation based on mobility-oriented pathway analysis; and, other values indicate how similar areas or scenarios are to environmental conditions in the calibration area . (PNG 19708 kb)
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Polo, G., Luz, H.R., Regolin, A.L. et al. Distribution modeling of Amblyomma rotundatum and Amblyomma dissimile in Brazil: estimates of environmental suitability. Parasitol Res 120, 797–806 (2021). https://doi.org/10.1007/s00436-020-06924-9
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DOI: https://doi.org/10.1007/s00436-020-06924-9


