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<p><i>Aedeomyia squamipennis</i> is the only Neotropical representative of a genus recognized for its ornithophilic behavior and potential involvement in the transmission of avian malaria and arboviruses. Despite its broad distribution in South America, ecological information on its habitat preferences and seasonal patterns remains scarce. This study investigated the spatial distribution and climatic factors associated with <i>Ad. squamipennis</i> in three habitat types within the Coastal Plain of southern Brazil, an ecologically relevant region for migratory and overwintering birds. Mosquitoes were sampled monthly from August 2014 to May 2015 in urban, rural, and forested environments across three municipalities. Abundance patterns were compared using nonparametric tests, and correlations with mean temperature, precipitation, and relative humidity were assessed. A total of 1,156 specimens were collected, with higher abundances in rural (79.1%) and forested areas (20.7%), whereas urban environments contributed only 0.2% of captures. <i>Ad. squamipennis</i> abundance was significantly higher in rural habitats compared with other areas (<i>p</i> &lt; 0.05). Population peaks showed a strong positive correlation with temperature (r = 0.84; <i>p</i> = 0.0026) and a negative correlation with relative humidity (r = –0.86; <i>p</i> = 0.0020), indicating that warmer and less humid conditions favored adult activity. Precipitation showed a negative correlation with mosquito abundance in Rio Grande (r = -0.441; <i>p</i> = 0.202) and in São Lourenço do Sul (r = -0.590; <i>p</i> = 0.056), with no statistically significant association during the study period. <i>Ad. squamipennis</i> was primarily associated with rural flooded areas and adjacent forested habitats. Temperature and humidity were the main drivers of its population dynamics, highlighting seasonal fluctuations in abundance and implications for parasite transmission. These findings support integrated monitoring of ornithophilic mosquitoes and advance the understanding of ecological interfaces relevant to avian parasite circulation within a One Health framework.</p> Graphical Abstract <p></p>

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Distribution and Seasonality of Aedeomyia (Aedeomyia) squamipennis (Lynch Arribálzaga, 1878) in the Coastal Plain of Rio Grande do Sul, Brazil: Ecological and Epidemiological Implications

  • 期刊论文

  • 发表日期：

    2026年4月24日

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  • Paulino Siqueira Ribeiro,
  • Cássio Lázaro da Silva-Inacio,
  • Francielly Felchicher,
  • Shayenne Olsson Freitas da Silva,
  • Marcial Corrêa Cárcamo,
  • Élvia Elena Silveira Vianna,
  • Patricia Jacqueline Thyssen

摘要

Aedeomyia squamipennis is the only Neotropical representative of a genus recognized for its ornithophilic behavior and potential involvement in the transmission of avian malaria and arboviruses. Despite its broad distribution in South America, ecological information on its habitat preferences and seasonal patterns remains scarce. This study investigated the spatial distribution and climatic factors associated with Ad. squamipennis in three habitat types within the Coastal Plain of southern Brazil, an ecologically relevant region for migratory and overwintering birds. Mosquitoes were sampled monthly from August 2014 to May 2015 in urban, rural, and forested environments across three municipalities. Abundance patterns were compared using nonparametric tests, and correlations with mean temperature, precipitation, and relative humidity were assessed. A total of 1,156 specimens were collected, with higher abundances in rural (79.1%) and forested areas (20.7%), whereas urban environments contributed only 0.2% of captures. Ad. squamipennis abundance was significantly higher in rural habitats compared with other areas (p < 0.05). Population peaks showed a strong positive correlation with temperature (r = 0.84; p = 0.0026) and a negative correlation with relative humidity (r = –0.86; p = 0.0020), indicating that warmer and less humid conditions favored adult activity. Precipitation showed a negative correlation with mosquito abundance in Rio Grande (r = -0.441; p = 0.202) and in São Lourenço do Sul (r = -0.590; p = 0.056), with no statistically significant association during the study period. Ad. squamipennis was primarily associated with rural flooded areas and adjacent forested habitats. Temperature and humidity were the main drivers of its population dynamics, highlighting seasonal fluctuations in abundance and implications for parasite transmission. These findings support integrated monitoring of ornithophilic mosquitoes and advance the understanding of ecological interfaces relevant to avian parasite circulation within a One Health framework.

Graphical Abstract