Ovarian follicular cycle of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae) in a semiarid region of Brazil
The reproductive cycle of Squamata reptiles is often associated with environmental conditions, such as rainfall. In this respect, seasonal variations may affect the morphology of the ovarian follicles, which are associated with vitellogenesis. The present study describes histological alterations in the ovarian cycle of two lizard species, Tropidurus hispidus (Spix, 1825) and Tropidurus semitaeniatus (Spix, 1825), which inhabit a caatinga region in the state of Rio Grande do Norte. Our goal was to identify morphological differences in the ovarian follicles at each phase of vitelloge nesis and to ascertain if they are associated with rainfall. Three follicular phases were identified in both species: pre-vitellogenesis, vitellogenesis and follicular atresia. An additional phase, the luteal, was found only in T. hispidus. During the development of these phases, vitellus was deposited inside the oocyte and there were identifiable alterations in the granulosa and thecal layers. Rainfall was found to influence the gonadal cycle.
Main Authors: | Santos,Hellen S., Santos,Jamile M.S., Matos,Maria H.T., Silva,Naisandra B., Freire,Eliza M.X., Ribeiro,Leonardo B. |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Zoologia
2015
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000100086 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Reproductive and fat body cycles of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata, Tropiduridae) in a caatinga area of northeastern Brazil
by: RIBEIRO,LEONARDO B., et al.
Published: (2012) -
Trophic ecology and foraging behavior of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata, Tropiduridae) in a caatinga area of northeastern Brazil
by: Ribeiro,Leonardo B., et al.
Published: (2011) -
The effects of seasonality on the foraging behavior of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae) living in sympatry in the Caatinga of northeastern Brazil
by: Kolodiuk,Miguel F., et al.
Published: (2009) -
Predation on Tropidurus hispidus (Squamata: Tropiduridae) by Lasiodora klugi (Aranea: Theraphosidae) in the semiarid caatinga region of northeastern Brazil
by: Vieira,Washington Luiz Silva, et al.
Published: (2012) -
First Record of leucism in Tropidurus hispidus (Spix, 1825) (Squamata: Tropiduridae) in north Brazil, Eastern Amazon
by: Sanches,Patrick Ribeiro, et al.
Published: (2019)