Climatic zoning of conditions for the development of the larva of the mosquito that transmits the dengue fever virus in the State of Rio Grande do Sul

Buriol, Galileo Adeli; Estefanel, Valduino; Gracioli, Michelle da Silva Araújo; Fantineli, Dreisse Gabbi; Chagas, Álvaro Chagas de

doi:10.3395/reciis.v3i2.146en

Cited by 2 publications

(3 citation statements)

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“…The region has high levels of rainfall in all months, with average monthly precipitation of more than 200 mm for all months of the year (Buriol et al . 2009) and average annual precipitation of more than 2200 mm (Backes et al . 2005).…”

Section: Methodsmentioning

confidence: 99%

“…(Bonatti et al 2006). Temperatures range from −3-18 • C in the cold season and 18.3-27 • C in the warm season, and an annual average of 14.5 • C. The region has high levels of rainfall in all months, with average monthly precipitation of more than 200 mm for all months of the year (Buriol et al 2009) and average annual precipitation of more than 2200 mm (Backes et al 2005).…”

Section: Study Sitementioning

confidence: 99%

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Directional orientation of migration in an aseasonal explosive-breeding toad from Brazil

et al. 2010

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Abstract:The directional orientation of pre- and post-reproductive migration was studied in the Brazilian red-bellied toad Melanophryniscus cambaraensis, a species that forms explosive-breeding aggregations at irregular intervals throughout the entire year. Migrating toads were captured by enclosing the breeding site in dual drift fences with inward- and outward-facing funnel traps. Data were collected over 5 mo and totalled 333 captures. The observed directional orientation was significantly different from expected under a uniform distribution for both pre- and post-reproductive migration, regardless of gender. Males and females did not differ significantly from each other in the orientation of entry or exit, and the directional orientation of pre-reproductive migration was not significantly different from post-reproductive migration. It is suggested that the observed directional bias may be due to a dirt road next to the breeding site that could restrict juvenile dispersal to the adjacent forest.

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Section: Methodsmentioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

Directional orientation of migration in an aseasonal explosive-breeding toad from Brazil

et al. 2010

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“…The climate is classified as Temperate Superhumid (Maluf 2000), with temperatures ranging from -3 to 18°C in winter months and 18.3-27°C in the summer months, and an annual average of 14.5°C. The region has high levels of rainfall in all months, with average monthly precipitation of more than 200 mm for all months of the year (Buriol et al 2009) and average annual precipitation of more than 2,200 mm (Backes et al 2005). We collected field data from October 2008 to February 2009 (127 nights) at a temporary stream that forms following heavy rainfall (29°25 0 41.3 00 S 50°23 0 44.5 00 W, 866 m above sea level) and the adjacent forest.…”

Section: Study Site and Data Collectionmentioning

confidence: 99%

Diel pattern of migration in a poisonous toad from Brazil and the evolution of chemical defenses in diurnal amphibians

Santos

Grant

2010

Evol Ecol

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Most amphibians with biphasic life cycles have aquatic eggs and larvae and terrestrial adults that migrate between terrestrial habitats and aquatic breeding sites. Migration usually occurs at night in order to avoid desiccation and predation. However, some amphibians also migrate during the day, and it has been proposed that this may have evolved as a result of poisonous skin secretions and aposematic coloration that release individuals from visually oriented diurnal predators. Based on this hypothesis and recent observations of 24 h breeding activity in the poisonous, aposematic toad Melanophryniscus cambaraensis, we predicted that migration in this species would occur equally during the day and night. To test our prediction we documented the diel pattern of migratory activity over multiple explosive breeding events from October 2008 to February 2009 (127 nights) at a temporary stream in Rio Grande do Sul state, southern Brazil. We also obtained environmental data to determine if diel activity could be attributed to variation in rainfall, barometric pressure, temperature, and/or relative air humidity. Contrary to our prediction, migratory activity in M. cambaraensis is strongly diurnal. Although temperature and humidity varied significantly between day and night intervals, this variation does not account for the diurnal-only migratory activity of M. cambaraensis. We suggest that the diurnal-only migratory activity of M. cambaraensis is best explained by phylogeny, not contemporary functions or selective pressures. Diurnal activity is primitive for this species and evolved in the common ancestor of Agastorophrynia, prior to the chemical defenses found in toads (Bufonidae) and poison frogs (Dendrobatidae). This suggests that chemical defenses in these groups may have evolved as a result of the diurnal activity that brought them into contact with visually oriented diurnal predators, and not the other way around.

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Climatic zoning of conditions for the development of the larva of the mosquito that transmits the dengue fever virus in the State of Rio Grande do Sul

Cited by 2 publications

References 4 publications

Directional orientation of migration in an aseasonal explosive-breeding toad from Brazil

Directional orientation of migration in an aseasonal explosive-breeding toad from Brazil

Diel pattern of migration in a poisonous toad from Brazil and the evolution of chemical defenses in diurnal amphibians

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