Cannibalism: Do risks of fighting and reprisal reduce predatory rates?
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Fernández Maldonado, Francisco Javier; Gallego Granados, Juan Ramón; Valencia, Alicia; Gámez Cámara, Manuel Angel; Varga, Zoltan; [et al.]Fecha
2017-05-20Resumen
Cannibalism is a common phenomenon among insects. It has raised considerable interest both from a theoretical
perspective and because of its importance in population dynamics in natural ecosystems. It could also play an important role
from an applied perspective, especially when using predatory species in biological control programmes. The present paper aims
to study the cannibalistic behaviour of Nabis pseudoferus Remane and the functional response of adult females. In a non-choice
experiment, adult females showed clear acceptance of immature conspecifics as prey, with relatively high mortality values
(51.89 ± 2.69%). These values were lower than those occurring for heterospecific prey, Spodoptera exigua Hübner, under the
same conditions (80.00 ± 2.82%). However, the main result was that the rate of predation on heterospecific prey was reduced
to 59.09 ± 7.08% in the presence of conspecific prey. The prey-capture behaviour of adult females differed when they hunted
conspecific...
Palabra/s clave
Ecology
Insects
Predatory species
Nabis pseudoferus
Spodoptera exigua