Biological parameters forRhipicephalus microplusin the field and laboratory and estimation of its annual number of generations in a tropical region

Author(s):Show less -

Cruz, Breno Cayeiro ^[1] ; de Lima Mendes, Ana Flavia ^[2] ; Maciel, Willian Giquelin ^{[1, 3]} ; dos Santos, Isabella Barbosa ^{[1, 3]} ; Gomes, Lucas Vinicius Costa ^{[1, 3]} ; Felippelli, Gustavo ^{[1, 3]} ; Teixeira, Weslen Fabricio Pires ^[4] ; Ferreira, Lorena Lopes ^[5] ; Soares, Vando Edesio ^[6] ; Lopes, Welber Daniel Zanetti ^{[4, 7]} ; da Costa, Alvimar Jose ^{[1, 3]} ; de Oliveira, Gilson Pereira ^{[1, 3]}

Affiliation

^[1] Sao Paulo State Univ Unesp, Sch Agr & Vet Sci, Jaboticabal, SP - Brazil

^[2] Univ Ctr Barao de Maua, Ribeirao Preto, SP - Brazil

^[3] Lopes, Welber Daniel Zanetti, Univ Fed Goias, Dept Biosci \& Technol, Inst Trop Pathol \& Publ Hlth, Goiania, Go, Brazil.Cruz, Breno Cayeiro, Sao Paulo State Univ UNESP, Sch Agr & Vet Sci, Jaboticabal, SP - Brazil

^[4] Univ Fed Goias, Sch Vet & Zootech, Goiania, Go - Brazil

^[5] Univ Fed Minas Gerais, Dept Vet Prevent Med, Sch Vet, Belo Horizonte, MG - Brazil

^[6] Brasil Univ, Descalvado, SP - Brazil

^[7] Univ Fed Goias, Dept Biosci & Technol, Inst Trop Pathol & Publ Hlth, Goiania, Go - Brazil

• Document type: Journal article
• Source: Parasitology Research; v. 119, n. 8 JUN 2020.
• Web of Science Citations: 0

Abstract

The present study aimed to evaluate biological parameters ofRhipicephalus microplusin the non-parasitic phase in both field and laboratory conditions. It also aimed to assess correlations between duration (in days) of these parameters and climatic variables (humidity, rainfall, and soil temperature) and to estimate the annual number of generations ofR. microplusin a tropical region. The non-parasitic phase ofR. microplusin field and laboratory conditions was evaluated throughout the course of two years. A pasture was infested with engorged female ofR. microplus, and biological parameters, including female pre-oviposition, female oviposition, egg mass incubation, larval pre-hatching phase, larval maturation, and larval longevity, were evaluated concomitantly with the collection of data on climatic conditions. The same parameters were also evaluated in a climatized chamber in the laboratory. The total duration of the non-parasitic phase in the field was longer in the dry season (1st and 4th life-cycle repetitions) than in the rainy season (2nd, 3rd, and 5th repetitions). Tick biological parameters for the non-parasitic phase in the laboratory were similar to those obtained in the field during the rainy season. The evaluated biological parameters were influenced mainly by environmental and ground-level temperatures, which modified egg mass incubation, larval pre-hatching, and larval longevity periods and, consequently, the total duration of the non-parasitic phase of the tick. The annual number of generations for the tick was estimated at five per year, which is alarming because it represents an increase, and so new studies into strategic control are needed. (AU)

• FAPESP's process: 14/14820-2 - Ecological, biological and resistance aspects of Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) at the region of Jaboticabal, State of São Paulo, Brazil
• Grantee: Breno Cayeiro Cruz
• Support Opportunities: Scholarships in Brazil - Doctorate