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Neotrop Entomol. 2006 Jan-Feb;35(1):41-8.

Trap-nest occupation by solitary wasps and bees (Hymenoptera: Aculeata) in a forest urban remanent.

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Lab. Ecologia e Comportamento de Insetos. Instituto de Ciências Biológicas, Depto. Biologia Geral Univ. Federal de Minas Gerais. Av. Antônio Carlos, 6627, 30161-970, C. postal 486, Belo Horizonte, MG.


Temporal variation of solitary wasps and bees, nesting frequency, mortality, and parasitism were recorded from a remanent forest in Belo Horizonte, MG, Brazil. Wasps and bees were collected in trap-nests placed in areas with 25, 100, and 400 m2, from February to November 2004. The 137 trap-nests collected contained 11 species of wasps and bees. Wasps occupied most nests (75%). Occupation peaks occurred in March (25%) and September (26%); in June, the lowest occupation (2%) was observed. Except for Trypoxylon (Trypargilum) lactitarse Saussure, no significant correlation was found between number of occupied nests, and temperature and rainfall means. In the nests, 48% of the immature specimens died; 13% of the nests were parasitized. Total death and parasitism rates of wasps and bees differed significantly.

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