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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Oocyte maturation in the sloth's giant tick Amblyomma varium (Acari: Ixodidae) in an ecological context

Texto completo
Sanches, Gustavo S. [1] ; Andre, Marcos R. [2] ; do Prado, Angelo P. [3] ; Allegretti, Silmara M. [3] ; Remedio, Rafael N. [1] ; Nunes, Pablo H. [1] ; Machado, Rosangela Z. [2] ; Bechara, Gervasio H. [2] ; Camargo-Mathias, Maria I. [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] UNESP, Inst Biociencias, Dept Biol, BR-13506900 Rio Claro, SP - Brazil
[2] UNESP, Lab Imunopatol, Dept Patol Vet, BR-14884900 Jaboticabal, SP - Brazil
[3] Univ Estadual Campinas UNICAMP, Dept Biol Anim, Inst Biol, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Experimental and Applied Acarology; v. 64, n. 4, p. 519-531, DEC 2014.
Citações Web of Science: 2

The sloth's giant tick Amblyomma varium Koch, which is a neotropical species that inhabits tropical rainforests, is the largest tick reported to date. The adult stage of this tick parasitizes mammals from the families Bradypodidae and Magalonychidae (Xenarthra) nearly exclusively. This study aimed to describe morphological and histological features of the reproductive system and the oocyte maturation process of this tick species. The ovary of A. varium is a long single tubular organ that is horseshoe-shaped, winding and arranged in the posterior part of the body. Two oviducts are connected to the ovary on each side; these thicken at certain region forming the uterus (common oviduct), followed by a muscular connecting tube, vagina and genital aperture. A large number of oocytes at different stages of development are attached to the ovary wall by the pedicel, as they reach maturity they are released into the ovary lumen and from there to the genital aperture. These oocytes develop simultaneously and asynchronically along the ovary. Amblyomma varium oocytes were classified into five development stages (i.e., I-V), and specific characteristics were observed; the processes of yolk and chorion deposition begin early in oocytes stage II, and oocytes V exhibit a very thick chorion and eggs of a large size. These characteristics are likely adaptations that enhance the survival and the reproductive success of this extremely host-specific tick, which is limited to a particular environment. (AU)

Processo FAPESP: 10/00415-8 - Comparação da biologia e da morfologia (externa e do sistema reprodutor de machos) de Rhipicephalus sanguineus (Latreille, 1806) do Brasil e Rhipicephalus turanicus Pomerantsev, 1936 (Acari: Ixodidae) da Espanha
Beneficiário:Gustavo Seron Sanches
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 13/10394-6 - Potencial Imunogênico da Proteína Ribossomal P0 Contra o Carrapato Rhipicephalus sanguineus (Acari:Ixodidae)em Cães
Beneficiário:Gustavo Seron Sanches
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado