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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Copulation is necessary for the completion of a gonotrophic cycle in the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae)

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Sanches, Gustavo S. [1] ; de Oliveira, Patricia R. [1] ; Andre, Marcos R. [2] ; Machado, Rosangela Z. [2] ; Bechara, Gervasio H. [2] ; Camargo-Mathias, Maria I. [1]
Total Authors: 6
[1] UNESP, Dept Biol, Inst Biociencias, BR-13506900 Rio Claro, SP - Brazil
[2] UNESP, Lab Imunoparasitol, Dept Patol Vet, BR-14884900 Jaboticabal, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF INSECT PHYSIOLOGY; v. 58, n. 7, p. 1020-1027, JUL 2012.
Web of Science Citations: 3

Ovarian development and egg maturation are essential stages in animal reproduction. For bisexual ixodid ticks, copulation is an important prerequisite for the completion of the gonotrophic cycle. In this study, we aimed to characterize the morpho-histological changes in the ovary and oocytes of the tick Rhipicephalus sanguineus, together with the identification of feeding and reproductive parameters associated with mating. Virgin and cross-mated females (with R. turanicus males) weighed 60% less at full engorgement than females mated conspecifically. In addition, the oocytes of these females did not develop to the same advanced stages as those of the conspecifically mated females. Sequencing of a 250-bp ITS-2 fragment in eggs that originated from a cross between an R. sanguineus female and an R. turanicus male showed a genotype similar (except by a deletion of 1 thymine) to that observed in the mother, arguing against fertilization by a trans-specific male. These findings suggest that male sex peptides are species-specific molecules that influence both full engorgement and oocyte maturation. Mechanical stimulation of the gonopore alone was insufficient for the completion of the entire process of vitellogenesis. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 10/00415-8 - Biological and morphological (external and reproductive system of males) comparison of Rhipicephalus sanguineus (Latreille, 1806) from Brazil and Rhipicephalus turanicus Pomerantsev, 1936 (Acari: Ixodidae) from Spain
Grantee:Gustavo Seron Sanches
Support Opportunities: Scholarships in Brazil - Doctorate