Predatory capacity and prey selectivity of nymphs of the dragonfly Pantala hymenaea (Odonata: Libellulidae) were evaluated on larvae of the mosquito Culex quinquefasciatus (Diptera: Culicidae) and larvae of the midge Chironomus plumosus (Diptera: Chironomidae) as prey. With functional response methodology, 7 larval densities were exposed to predator individuals in a glass jar under laboratory conditions. The study was performed in 2 experiments. The 1st was a test system with each prey species alone. The 2nd tested a mixture of both prey species in a 1:1 ratio. Prey selectivity and prey capacity were significantly greater on midge larvae than on mosquito larvae.
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1 September 2005
PREDATORY CAPACITY AND PREY SELECTIVITY OF NYMPHS OF THE DRAGONFLY PANTALA HYMENAEA
Humberto Quiroz-Martínez,
Violeta Ariadna Rodríguez-Castro,
Carlos Solís-Rojas,
María Guadalupe Maldonado-Blanco
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biological control
Chironomus plumosus
Culex quinquefasciatus
dragonflies
Pantala hymenaea
predation