Population dynamics of oribatid mites in an endemic zone of sheep cestodosis in Argentina

Resumo

The dynamics in the occurrence of mites intermediate hosts of anoplocephalid cestodes causing mortalities in lambs, was studied in the southwest of Buenos Aires Province (Argentina). Three farms that breed Corriedale and Lincoln sheep, at Puan District, Buenos Aires Province, were visited monthly
(from June to January) to take soil samples from 0 to 6 cm depth. A total of 22 oribatid species
were found. Oribatid males, which are most susceptible to infection with larval stages
of anoplocephalids, were dominant by the end of spring. Zygoribatula lata was the most frequent
and abundant species, representing 70-90% of oribatids found. Further understanding
of the dynamics of oribatid populations in sheep breeding farms, as well as prophylaxis and
treatment alternatives are discussed.