IADIZA   20886
INSTITUTO ARGENTINO DE INVESTIGACIONES DE LAS ZONAS ARIDAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Local adaptation of Triatoma infestans response to thermal variability: implications of climate change over Chagas diseases incidence.
Autor/es:
CAVIERES, GRISEL; BASMADJIÁN, YESTER; GONZALEZ, AVIA; CATTAN, PEDRO; CLAVIJO-BAQUET, SABRINA; LEON, DIEGO; BOZINOVIC, FRANCISCO
Lugar:
Ottawa
Reunión:
Congreso; 10th International Congress of Comparative Physiology and Biochemistry; 2019
Institución organizadora:
IACPB
Resumen:
Vector-borne diseases (VBDs) are susceptible to climate change since most of its vectors are ectotherms. Understanding the relationship between vector?s performance and temperature is necessary to successfully predict the consequences of climate change on the incidence of VBDs. Most of the studies considering climate change?s effects assume that vector populations do not show geographic variation and project changes in vector?s distribution based on a single population. Here, we studied the impact of thermal variability on locomotion performance in Triatoma infestans (Chagas disease?s vector). We acclimated individuals from two colonies with different geographic origin (Chile and Uruguay). Colonies were maintained at the same conditions for several generations (e.g., common garden experiment). We quantified the effect of temperature on walking speed on individuals exposed at eight temperatures (from 8 to 42ºC) after four thermal acclimations. We fit GAM models to analyze the effects of acclimation and geographic origin over performance curves. We found that individuals from Uruguay perform better under variability at low temperatures while individuals from Chile responded better at higher temperatures. These genetic differences of T. infestans populations to thermal responses demonstrate that predictions of climate change effects over vector?s distribution using a single population could be flawed FONDECYT-11160839