Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population

Nothura maculosa is a South American Tinamidae with a marked seasonal reproductive pattern. This work describes ovarían seasonal changes in this species related to gonadotrope (GTHs) population. Ovary and pituitary samples were collected monthly from adult birds during four annual periods. They were...

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Autores principales:	Claver,Juan, Rosa,Juan M, Lombardo,Daniel M, Soñez,María C
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2008
Materias:	Birds Gonadotropes Nothura maculosa Ovary Pituitary Reproduction Tinamidae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000200017
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spelling	oai:scielo:S0717-950220080002000172008-11-25Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope PopulationClaver,JuanRosa,Juan MLombardo,Daniel MSoñez,María C Birds Gonadotropes Nothura maculosa Ovary Pituitary Reproduction Tinamidae Nothura maculosa is a South American Tinamidae with a marked seasonal reproductive pattern. This work describes ovarían seasonal changes in this species related to gonadotrope (GTHs) population. Ovary and pituitary samples were collected monthly from adult birds during four annual periods. They were fixed in Bouin's solution and processed for light microscopy. The data of post-fixation gonadal weight were analysed using STATISTIX 4.0. Histological sections of the ovaries were stained with H/E, PAS and Goldner-Masson trichrome. Single and double immunostaining were applied on pituitary sections with anti-chicken-FSH and anti-chicken-LH antibodies. The samples were analysed in quarterly periods of the year, Pl: March-May (resting stage); P2: June-August (developing stage); P3: September-November (reproductive stage); P4: December-February (involutive stage). Ovary weight (ow) significantly varied among periods (p<0.001). During Pl, only primordial and previtellogenic follicles were observed, ow 0.09±0.01 g (n=25); during P2, developing follicles with signs of vitellogenesis were detected, ow 0.13+0.01 g (n=14); during P3, máximum follicular development was found, ow 0.9±0.15 g (n=39); P4 exhibited great variability in follicular stages, ow 0.18+0.18 g (n=19). Involutive atresia was observed in all the periods, while bursting atresia and post-ovulatory follicles were only characterized at P3 and P4. The GTHs containing few LH and FSH immunoreactive (ir) granules were predominant during P1-P2. The GTHs with LH ir granules were abundant in intermedíate zone and caudal lobe in P3 and P4 while few cells contained both types of granules. The number of FSH cells was increased during P3 and P4. The histological ovarían changes were narrowly correlated with the variations in the gonadotrope population.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.26 n.2 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000200017en10.4067/S0717-95022008000200017
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Birds Gonadotropes Nothura maculosa Ovary Pituitary Reproduction Tinamidae
spellingShingle	Birds Gonadotropes Nothura maculosa Ovary Pituitary Reproduction Tinamidae Claver,Juan Rosa,Juan M Lombardo,Daniel M Soñez,María C Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
description	Nothura maculosa is a South American Tinamidae with a marked seasonal reproductive pattern. This work describes ovarían seasonal changes in this species related to gonadotrope (GTHs) population. Ovary and pituitary samples were collected monthly from adult birds during four annual periods. They were fixed in Bouin's solution and processed for light microscopy. The data of post-fixation gonadal weight were analysed using STATISTIX 4.0. Histological sections of the ovaries were stained with H/E, PAS and Goldner-Masson trichrome. Single and double immunostaining were applied on pituitary sections with anti-chicken-FSH and anti-chicken-LH antibodies. The samples were analysed in quarterly periods of the year, Pl: March-May (resting stage); P2: June-August (developing stage); P3: September-November (reproductive stage); P4: December-February (involutive stage). Ovary weight (ow) significantly varied among periods (p<0.001). During Pl, only primordial and previtellogenic follicles were observed, ow 0.09±0.01 g (n=25); during P2, developing follicles with signs of vitellogenesis were detected, ow 0.13+0.01 g (n=14); during P3, máximum follicular development was found, ow 0.9±0.15 g (n=39); P4 exhibited great variability in follicular stages, ow 0.18+0.18 g (n=19). Involutive atresia was observed in all the periods, while bursting atresia and post-ovulatory follicles were only characterized at P3 and P4. The GTHs containing few LH and FSH immunoreactive (ir) granules were predominant during P1-P2. The GTHs with LH ir granules were abundant in intermedíate zone and caudal lobe in P3 and P4 while few cells contained both types of granules. The number of FSH cells was increased during P3 and P4. The histological ovarían changes were narrowly correlated with the variations in the gonadotrope population.
author	Claver,Juan Rosa,Juan M Lombardo,Daniel M Soñez,María C
author_facet	Claver,Juan Rosa,Juan M Lombardo,Daniel M Soñez,María C
author_sort	Claver,Juan
title	Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
title_short	Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
title_full	Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
title_fullStr	Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
title_full_unstemmed	Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population
title_sort	histological seasonal changes in ovaries of spotted tinamous (nothura maculosa tinamidae, temminck, 1815) related to gonadotrope population
publisher	Sociedad Chilena de Anatomía
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000200017
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Histological Seasonal Changes in Ovaries of Spotted Tinamous (Nothura maculosa Tinamidae, Temminck, 1815) Related to Gonadotrope Population

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