Neotropical Entomology (2010) 39, 289-298

Rachel B. dos Santos, José Lopes and Karen B. dos Santos (2010)
Distribuição espacial e variação temporal da composição de espécies de borrachudos (Diptera: Simuliidae) em uma microbacia situada no norte do Paraná
[Spatial distribution and temporal variation in composition of black fly species (Diptera: Simuliidae) in a small watershed located in the northern region of Paraná State, Brazil]
Neotropical Entomology 39 (2), 289-298
Abstract: In this work, the survey of simuliid species and the study of their spatial distribution in four streams of a small watershed situated in Londrina, Paraná State, were carried out from January to October 2007. Changes in the species composition of the breeding sites were also checked along the sampling months. Seventeen black fly species were found, being Simulium botulibranchium Lutz, Simulium travassosi d'Andretta and d'Andretta, Simulium anamariae Vulcano, Simulium brachycladum Lutz and Pinto and Simulium metallicum s. l. Bellardi new records for Paraná State. The Canonical Correspondence Analysis showed that the environmental variables most correlated to the species distribution among sample sites were water conductivity and those linked to physical dimensions of the breeding sites, like width, depth and water velocity. The matrix of faunistic similarity among collecting dates was negatively correlated to the time interval of sampling matrix for three of the water bodies studied, showing the existence of temporal changes in the species composition. According to Multiple Regression Analysis, temporal abundance variation of Simulium perflavum Roubaud, Simulium inaequale Paterson and Shannon and Simulium lutzianum s. l. Pinto was not linked to air temperature, photoperiod and rainfall, suggesting the influence of other factors, probably those directly associated to specific breeding site conditions. The results indicate that differences in physical and chemical characteristics among water bodies may affect the taxonomic composition of simuliids in this watershed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Simulium metallicum		Brazil (south)
	Simulium pertinax		Brazil (south)
	Simulium incrustatum		Brazil (south)
	Simulium nigrimanum		Brazil (south)
	Simulium orbitale		Brazil (south)
	Simulium inaequale		Brazil (south)
	Simulium perflavum		Brazil (south)
	Simulium spinibranchium		Brazil (south)