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Effects of different temperatures on the free-living phase of Dermacentor Anocentor nitens Neumann, 1897 Acari Ixodidae in the laboratory Efeitos de diferentes temperaturas sobre a fase nao parasitaria de Dermacentor Anocentor nitens Neumann, 1897 Acari Ixodidae em condicoes de laboratorio



Effects of different temperatures on the free-living phase of Dermacentor Anocentor nitens Neumann, 1897 Acari Ixodidae in the laboratory Efeitos de diferentes temperaturas sobre a fase nao parasitaria de Dermacentor Anocentor nitens Neumann, 1897 Acari Ixodidae em condicoes de laboratorio



Revista Brasileira de Parasitologia Veterinaria. fevereiro; 51: 29-32



This study was designed to determine the influence of temperature on the free-living phase of the life-cycle of Dermacentor (Anocentor) nitens in the laboratory. The experiments were carried out in three incubators (B.O.D.) at 18, 27 and 32 degree C with relative humidity higher than 80%. A number of 45 engorged females was used individually at each temperature. The preoviposition, oviposition and incubation periods were shortened as temperature increased. The period of eclosion was similar at 27 and 32 degree C and shorter at 18 degree C. Percentage of eclosion was too much reduced at 18 degree C in comparison to 27 and 32 degree C. Larval mortality started earlier at 27 degree C than 32 degree C, however, duration of larval stage was longer at 27 degree C. At 18 degree C, larval mortality occurred night after eclosion. In conclusion, the temperature of 18 degree C was deleterious for the free-living phase of this tick species.

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