Reproduction of Dichelops furcatus (Hemiptera: Pentatomidae): single or multiple mating consequences

LILJESTHRÖM, G.G.; CINGOLANI, M.F.; ROGGIERO, M.

Gramado (RS, Brasil)

Congreso; XXVII Congresso Brasileiro y X Latinoamericano de Entomologia; 2018

Sociedad Entomologica Brasileira

A trade-off is a negative relationship between two life history traits in which increases in one areassociated with decreases in the other, as a result of a compromise allocation of the limitedresources that are available to it. Trade-offs are fundamental in predicting the optimal life historyin any given environment, and commonly traits considered are reproduction and adult longevity.We analyzed by ANOVA the effect of no matings (VF), only one mating (1C), versus multiplematings (MC) on the reproductive performance of Dichelops furcatus. The duration of thereproductive period was similar in all treatments, but the pre-ovipositional period was shorter forMC and 1C than for VF. Females MC oviposited more eggs than VF and 1C, respectively, 192.60eggs/female (15.15 egg masses), 166.89 eggs/female (12.50 egg masses), and 40.85 eggs/females(4.15 egg masses). Additionaly, the fertility of eggs were higher for MC than for 1C (the differenceoccurred in the second half of the ovipositional period), while VF were able to oviposit but eggswere unfertile. Females of the group MC had a much shorter longevity when compared to 1C andVF. Longevity of MC females was positively correlated to the duration of the reproductive periodand to fecundity. However, longevity of 1C females was positively correlated only to the durationof the reproductive period, but fecundity was not correlated to longevity.