[Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) requires long matings for successful reproduction].
The occurrence of multiple and long matings seem to play an important role in the reproduction of the predatory stinkbugs such as Podisus nigrispinus (Dallas). However, the mechanisms underlying these behaviors remain unclear. In this study, the reproduction of P. nigrispinus was investigated as function of females' choice for their mating pair based on male body size and previous mating status, risk of predation and duration of mating. The female mating behavior was studied with female having multiple, partial or no partner choice based on male body size. Time to initiate a mating and its duration was observed after pairing males and females under risk of predation imposed by the presence of the predatory wasp Polistes versicolor Oliver. In addition, aiming to determine the reasons for long lasting matings, female had their mating interrupted at different intervals. Our data indicated that P. nigrispinus females do not select male partners as function of their body size and mating status. Duration of mating, mating partners' choice, and female fecundity and fertility were not influenced by the male size and risk of predation imposed by the predatory wasps. Mating interrupted after 30, 60, 120 and 240 min resulted in only 0, 3.1, 7.7 and 34% of egg hatching compared to 74.2% under uninterrupted mating (338 to 671 min long). Therefore, the reproductive success of P. nigrispinus females does not depend on male size and male mating status, but requires long-lasting mating as a condition for adequate spermatozoa transference to females instead.
Rodrigues
Agna R S
AR
Depto. de Agronomia - Entomologia, Univ. Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros s/n, Dois Irmaos, 52171-900 Recife, PE. agnarodrigues@yahoo.com.br
Torres
Jorge B
JB
Siqueira
Herbert A A
HA
Teixeira
Valéria W
VW
D000818:Animals; D003307:Copulation; D005260:Female; D006430:Hemiptera / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D012098:Reproduction; D013997:Time Factors