Phenology of Cornops aquaticum (Orthoptera: Acrididae) associated with Eichhornia crassipes (Pontederiaceae) in a Floodplain Lake in Central Amazonia, Brazil

The Neotropical grasshopper Cornops aquaticum (Bruner) lives associated with the macrophytes of the family Pontederiaceae from which it feeds. In the lakes of Central Amazon, Eichhornia crassipes (Mart.) Solms (water hyacinth or Murure) is considered the most important host plant for this grasshoppe...

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Bibliographic Details
Published in:Revista de la Sociedad Entomológica Argentina 2011-12, Vol.70 (3-4), p.185-196
Main Authors: Braga, CE, Nunes-Gutjahr, AL, de Morais, JW, Adis, J
Format: Article
Language:Spanish
Subjects:
Acrididae
Eichhornia crassipes
Orthoptera
Pontederiaceae
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Summary:The Neotropical grasshopper Cornops aquaticum (Bruner) lives associated with the macrophytes of the family Pontederiaceae from which it feeds. In the lakes of Central Amazon, Eichhornia crassipes (Mart.) Solms (water hyacinth or Murure) is considered the most important host plant for this grasshopper. This study aimed to perform a phenological study of adults and nymphs of grasshopper in association with its host plant, compared to the hydrological regime of the Central Amazon. This study was undertaken between April 2006 and August 2007 at the Chameleon Lake (03 17'05"S, 60 11'11"W) in the Central Amazon floodplain. An entomological net adapted for catching grasshoppers was used. 850 individuals (296 adults and 554 nymphs) were captured. It was observed that the abundance and biomass of adults and nymphs of C. aquaticum, as well as their macrophyte host are related to the "flood pulse", ie. to the seasonal oscillations of the Amazonian rivers.Original Abstract: La tucura Neotropical, Cornops aquaticum (Bruner), vive asociada a las macrofitas de la familia Pontederiaceae, de las cuales se alimenta. En los lagos de la Amazonia Central, Eichhornia crassipes (Mart.) Solms (camalote o aguape) constituye la planta huesped mas importante de esta tucura. El objetivo de este trabajo fue estudiar la fenologia de los adultos y las ninfas de C. aquaticum en los camalotales de E. crassipes, en relacion al regimen hidrologico de la Amazonia Central. Los muestreos se realizaron entre los meses de abril de 2006 a agosto de 2007, en el Lago Camaleon (03 degree 17'05"S 60 degree 11'11"O) en la Varzea de la Amazonia Central. Los individuos fueron capturados desde una embarcacion a motor, utilizando una red entomologica de 70 cm de diametro. Durante este estudio, se capturaron un total de 850 ejemplares (296 adultos y 554 ninfas). Se observo que la abundancia y la biomasa de los adultos y de las ninfas de C. aquaticum, asi como la planta huesped, estan estrechamente relacionados con la oscilacion estacional del nivel del rio (pulso de inundacion).
ISSN:0373-5680