Bioecologia de Boophilus microplus (Canestrini,1887) (Acarina:Ixodidae) no Estado do Rio de Janeiro: oviposi??o e sazonalidade. Considera??es preliminares

• Autor(a) principal: Costa, Arlindo Luiz da
• Data de Publicação: 1982
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
• Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/3975
• topic: Medicina Veterin?ria; Medicina Veterin?ria

Studies on oviposition of B. microplus in laboratorial conditions (27?C of temeperature, 80-95% of relative humidity, in darkness), and on the seasonal activity and the role of this tick in mixed infestations on Holstein-Friesan and Holstein-Friesan x Guzera crossbreed cattle in field conditions were carried out in Rio de Janeiro State, Brazil. The studied population showed the following values: the preoviposition period ranged from 4 to 5 days with an average of 4.14 days; the oviposition period ranged from 5 to 9 days with an average of 7.36 days; the weight of masses of eggs ranged from 44 to 169 mg with an average of 100.4mg; the weight of each egg was 0.047mg; the longevity of females ranged from 11 to 18 days with an average of 14.3 days; the loss of organic mass with the oviposition, dryness and death was 69.51%; the number of eggs laid ranged from 966 to 3.718 with an average of 2,215; the estimation of hatch ranged from 25% to 100% with an average of 80.9%; the incubation period ranged from 23 to 27 days with an average of 24.9 days; the maximum longevity of lar- 32 vae was 122 days; the reproductive efficiency index (REI) ranged from 4,587.6 to 13,369.2 with an average of 10,053.4; the conversion efficiency index (CEI) ranged of 0.458. The seasonal distribution, based on only one year of estudy, was trimodal, with a smaller peark of infestation in March, a middling peak in June and a maximum peak in September-October showing a possible existence of three generations per year. In mixed infestations, A. cajennense was found in a little quantity yet in all stages of its life cicle. It was the only species of genus Amblyomma found on cattle.