Sex ratio and parental investment in Trypoxylon (Trypargilum) agamemnon Richards (Hymenoptera, Crabronidae)

Author:

Buschini MLT1,Bergamaschi ACB2

Affiliation:

1. Universidade Estadual do Centro-Oeste, Brasil

2. Universidade Federal de São Carlos, Brasil

Abstract

The life history and sex ratio data of the solitary wasp Trypoxylon agamemnon nesting in trap-nests in southern Brazil was recorded from January 2002 to December 2007. Its sex ratio is strongly female-biased, being bivoltine or multivoltine with until three generations per year. It has two alternative life histories (diapause and direct development) and overlapping generations. In addition to the conflict of interest between the sexes, it is possible that local mate competition occurs between males and may cause a greater investment in the production of females.

Publisher

FapUNIFESP (SciELO)

Subject

General Agricultural and Biological Sciences

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