Estudos adicionais sobre o ciclo biológico de espécies do gênero Raillietia Trouessart, 1902 (Acari: Gamasida)

Abstract

Some aspects of the life cycles of the two species of Raillietia (Acari-Gamasida), which parasitize cattle in Brazil, R. auris (Leidy) and R. flechtmanni Faccini, Leite and Costa were examined in vitro at 30°±1°C and 85-90% R.H. The life cycle from larviposition to adult in R. auris ranged from 84 to 108 hours (x=90,28±7,22) for males and from 72 to 96 hours (x=79,86±6,63) for females, whereas in R. flechtmanni the life cycle ranged from 84 to 120 hours (x=102±10,66) for males and 72 to 108 hours (x=86±9,50) for females. The life cycle was longer in R. flechtmanni than R. auris (P<0,05) probably due to longer nimphal (protoplus deutoninpha) period of the former. xiv Longevity ranged from 2 to 31 days (x=20,48±7,00) and 10 to 36 days (x=21,06±4,55) for males and females of R. auris, respectively. Longevity, in R. flechtmanni, ranged from 2 to 36 days for males (x=21,26±7,29) and 3 to 37 days (x=22,44±6,96) for females.