Comportamento e dieta alimentar de uma espécie de Latrodectus do grupo Mactans (Araneae, Theridiidae) em cativeiro

Abstract

Latrodectus gr. mactans is responsible for 28% of ali accidents provoked by spiders in state of Bahia, Brazil (1980-1990), which makes necessary the study of its manejament. The spiders were captured in Ondina, Salvador, and in Baxio, Esplanada (Bahia, Brazil); they were mantained in captivity, with food supply weekly (Atta sp., larva of Tenebrio sp. and Drosophila melanogaster) with three hours/ offers observation time, during march/95 to april/96. In captivity, the spiders accepted two kinds of food: Atta sp., which seems to be the major item of its diet in natural conditions, and larva of Tenebrio sp., which is not available in natural conditions. Drosophila melanogaster was systematically rejected. The feeding behavior iscomposed by four distinct steps: (1) imrnobilization, (2) inoculation, (3) second immobilization and (4) ingestion. Two kinds of social alimentary behavior are descri-bed. The results indicated that larvae of Tenebrio sp. can be an alternative supply for successfull maintenance of this specie in captivity.