Variations in the epithelial cords of the ovaries of a microchiropteran bat, Hipposideros speoris (Schneider) during reproductive cycle: An enzymic approach

Sastry, M. S.; Pillai, Subbi

doi:10.5897/jcab07.013

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…However, approaches on the reproductive biology of females are limited and their reproductive pattern are defined based only on investigations of the external morphological characteristics of their body (dilated abdomen, visible nipples with secretion and the absence of hair around it) (Racey 1988, Gannon & Willig 1992, Esbérard 2002. In other countries, there is some recent research on female gonadal histophysiology focusing on folliculogenesis and ovulation of different species of bats located in Colombia (Komar et al 2007), China (Wang et al 2008), Canada (Rintoul & Brigham 2014), Mexico (Antonio-Rubio Porras-Gómez & Moreno-Mendoza 2013) and India (Sastry & Pillai 2013, Singh et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the reproductive stage and ovarian histomorphometry of Dermanura cinerea (Chiroptera: Phyllostomidae) in an Atlantic Forest fragment of Pernambuco, northeastern Brazil

et al. 2018

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This study aimed to analyze the reproductive stage, histology and morphometry of the ovary of Dermanura cinerea in an Atlantic Forest fragments in the Biological Reserve of Saltinho, Pernambuco, Brazil. Adult females were captured monthly by mist net, during two consecutive nights from June/2014 to November/2015. The meteorological data were provided by the National Institute of Meteorology and grouped together with the reproductive data, in six periods: period I (June to August/2014), period II (September to November/2014), period III (December/2014 to February/2015), period IV (March to May/2015), period V (June to August/2015) and period VI (September to November/2015). The females were classified according to their reproductive stages in: Inactive, pregnant, lactating and postlactating. Among the 25 females caught, 10 inactive females were selected for the histomorphometric analysis of the ovaries and then they were euthanized. After that, the specimens had their ovaries removed, fixed, processed and included in Paraplast. The organs were cut and stained by Hematoxylin - Eosin and the histological slides produced were submitted to the appropriate optical microscope analysis. Each type of ovarian follicle was estimated according to the histological characteristics evidenced for other mammals. In the morphometric analysis, it was considered: The area of the ovary (measured in square millimeter), Quantification of different types of ovarian follicles (unilaminar and multilaminar primary follicles, antral and matures) and corpus luteum, as well as the area of each by those different follicles (measured in square micrometer) The results indicated that 16 females were inactive, 5 were lactating, 4 were pregnant and no post-lactating. The histological analysis revealed that the ovaries of D. cinerea exhibit characteristics, structures and cellular types similar to other mammals. The morphometric data of the study area were statistically evaluated using the Student’s t-test. Therefore, ovarian histomorphometric analysis are very important to infer with greater certainty about the reproduction of a species. Thus, it was observed that females of D. cinerea exhibit two reproductive peaks, that is, they can give birth either at the end of dry periods or from the beginning to the middle of the rainy season. The main feature observed in the ovary of this species, found in the Atlantic Forest area of the state of Pernambuco, is the preparation of the ovarian cortex to ovulate in months of high rainfall throughout the year. Therefore, this species tries to adjust its reproductive period with the variations of the environmental conditions, so that the reproduction might occur during the period more favorable for the maintenance of their offspring.

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Section: Introductionmentioning

confidence: 99%

Analysis of the reproductive stage and ovarian histomorphometry of Dermanura cinerea (Chiroptera: Phyllostomidae) in an Atlantic Forest fragment of Pernambuco, northeastern Brazil

et al. 2018

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Coypu (Myocastor coypus bonaeriensis) Ovarian Morphology During the Oestrous Cycle

Felipe,

Herrera,

Killian

et al. 2024

Anat Histol Embryol

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The coypu (Myocastor coypus bonariensis) is an annual polyestrous hystricomorph rodent with variable‐length oestrous cycles, which ovarian histoarchitecture during this period is not fully described. This study analyses variations in ovarian morphology during the oestrous cycle, focusing on follicular development and atresia. Eighteen sexually mature virgin females aged 7–9 months, weighing 4.795 ± 0.3996 kg, were used. Daily colpocytological analyses were performed to establish the cycle duration, followed by euthanasia at different phases—prooestrus, estrus, meteostrus, and on days 5, 10, and 20 of dioestrus. Morphology and superficial appearance of the ovaries, weight, and volume at each stage were recorded, and volume increase over time was analysed. A morphological classification and size ranges every 100 μm for follicular development analysis were used. Relative area analysis determined the proportions of different ovarian components and the absolute and relative frequencies of atretic and/or luteinized structures. Our study revealed differences between prooestrus, meteostrus, and all dioestrus phases, as well as between oestrus and metoestrus, and dioestrus at 10 and 20 days. Ovarian surface exhibited variations across different oestrous cycle stages, and atretic follicles were observed in all analysed stages. These findings provide new data and contribute to the understanding of the reproductive cycle in this species.

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Morphology and endocrinology of interstitial cells of bat ovary Hipposiderous speoris

Bisen¹

2019

IJPP

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Variations in the epithelial cords of the ovaries of a microchiropteran bat, Hipposideros speoris (Schneider) during reproductive cycle: An enzymic approach

Cited by 3 publications

References 22 publications

Analysis of the reproductive stage and ovarian histomorphometry of Dermanura cinerea (Chiroptera: Phyllostomidae) in an Atlantic Forest fragment of Pernambuco, northeastern Brazil

Analysis of the reproductive stage and ovarian histomorphometry of Dermanura cinerea (Chiroptera: Phyllostomidae) in an Atlantic Forest fragment of Pernambuco, northeastern Brazil

Coypu (Myocastor coypus bonaeriensis) Ovarian Morphology During the Oestrous Cycle

Morphology and endocrinology of interstitial cells of bat ovary Hipposiderous speoris

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