The Annual Testicular Cycle of the Domestic Quail (Coturnix coturnix japonica)

Artoni, Silvana Martinez Baraldi; Orsi, Antônio Marcos; Carvalho, Teresa Lúcia Lamano; Lopes, R A

doi:10.1111/j.1439-0264.1997.tb00145.x

Cited by 18 publications

(11 citation statements)

References 13 publications

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“…Statistical analysis revealed a significant (P<0.01) rise in the seminiferous tubule diameters, germinative epithelium and lumen diameter of seminiferous tubules during the peak breeding season as compared with the low and the non-breeding season, while there exist a reverse pattern of percentage area of interstitial tissue adjacent to seminiferous tubules in testicular parenchyma. These results are comparable with Baraldi-Artoni et al (1997 who studied these parameters in domestic quail. Serum testosterone concentrations were found significantly (P<0.01) higher during the peak breeding season which decreased during the low breeding season and declined to the baseline during the non-breeding season.…”

Section: Discussionsupporting

confidence: 81%

Seasonal Variations in Spermatogenic Activity and Serum Testosterone Concentration in Japanese Quails

Qureshi¹

2017

PAKJAS

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The present study investigates the influence of seasonal variations on testicular histomorphometric parameters of 15 adult male Japanese quails (Coturnix japonica) and testosterone concentrations over a year. The gross anatomical and histomorphometric study of both left and right testes was conducted. Serum testosterone concentration was measured by RIA technique. Statistical analysis revealed that the testicular weight and morphological parameters of testes including volume, length, width, thickness, and circumference were significantly (P<0.01) higher during peak breeding season (June-July). In contrast, all morphologic and histomorphometric parameters were significantly (P<0.01) lower during low breeding (Sept.-Oct.) and non-breeding season (Jan.-Feb). A significantly (P<0.01) higher serum testosterone concentration was recorded during peak breeding season which showed a gradual decline during regressive breeding season and finally reached to minimum during non-breeding season. Serum testosterone concentration showed a strongly significant positive correlation (r=0.855) with all studied testicular parameters, however a strongly negative correlation (r=-0.819) was ascertained between the relative humidity and serum testosterone concentration throughout the study period. It is concluded that Japanese quails demonstrate an annular reproductive cycle. The testosterone secretion clearly elevates and stimulates gonadal function to its peak in Japanese quails during summer season which gradually declines to bottom during harsh season of winter. It is conceivable that the pineal gland (melatonin hormone) responds to environmental influences, particularly changes in length of the daily photoperiod, and in turn exerts regulatory effects on the activity of the testis.

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Section: Discussionsupporting

confidence: 81%

Seasonal Variations in Spermatogenic Activity and Serum Testosterone Concentration in Japanese Quails

Qureshi¹

2017

PAKJAS

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“…Comparing the histology of the testicular parenchyma between the three samples, drastic changes are noticed, regarding seminiferous tubule volume and lumen diameter, these changes have also been reported in the Quail by BaraldI Artoni et al (1997), Baraldi Artoni et al (1999 and Aire (2003), and in the Ostrich by Madekurozwa et al (2002).…”

Section: Resultsmentioning

confidence: 70%

“…These species have already been studied, as well as the turkey and the garganey (Soley 1993, Soley & Roberts 1994, Soley 1997. The contribution was not made for the study of microscopic tissues alone, but also for the study of reproduction of these species (Baraldi Artoni et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Aspects of spermatogenesis and microscopic testicular morphology in Greater Rhea, Rhea americana (Linnaeus, 1758)

2016

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ABSTRACT.-Freneau G.E., Carvalho S.F.M., Saboia-Morais S.M. T. & Freneau B.N. 2016 The purpose of this study was to study the microscopic morphology of the testicular parenchyma of Rhea americana birds. Fifty-four 2.5±0.5 year-old male adults bred in captivity. were used. During commercial slaughter, samples of testis were collected in November respectively. Microscopic measures of seminiferous tubules, spermatic cells and diameter of the nuclei were presented. These data confirm reproductive seasonality, with breeding season in spring-summer with sperm production. A great variation n parenchyma, when compared breeding was noticeable.

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“…Thus, we can observe that certain phases of the testicular phase of the rooster (De Reviers, 1971), the swan (Breucker, 1982) and the quail (Baraldi-Artoni et al, 1997) are similar to the testicular cycle of the partridge Rynchotus rufescens.…”

Section: Seminiferous Tubules Diametermentioning

confidence: 79%

Morphometric study of Rynchotus rufescens testis throughout the year

et al. 2007

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The research aimed to study the morphologic variation of the testis, seeking to promote the selection and genetic control of those that present appreciable spermatic production throughout the year. Testis morphology of the Rynchotus rufescens partridge was investigated, analyzing the testis weight, the seminiferous tubules diameter, the thickness of the seminiferous epithelium, the amount of meiotic figures and the thickness of the tunica albuginea. Sixty male partridges were used, divided in 12 groups, and one group per month had the testis collected for the histological routine and the sections were stained using the Hematoxilin-Eosin technique. For the histological sections analysis, morphometric measures were taken, with the aid of an Image Analyzer and the resulting data were submitted to analysis of variance and to Tukey's test. Based on the histological modifications of the seminiferous epithelium and the morphometric analysis, the partridge testis morphology could be divided in four successive phases throughout the year. The reproductive phase occurred in the spring, characterized by the complete spermatogenesis process. The regression phase occurred in the summer, with the involution of the seminiferous epithelium. The rest phase took place in the fall, with spermatogonias presence and some spermatocytes beginning the meiosis. The phase of recrudescence occurred in the winter, with the recovery of the seminiferous epithelium and absence of spermatozoa. In conclusion, the characteristics analyzed revealed a variation over the year, with greater production of spermatozoa in the spring and less in the winter.Keywords: spermatogenesis, partridge, cycle. Estudo morfométrico do testículo de perdiz Rynchotus rufescens durante o anoResumo O trabalho teve como objetivo estudar a variação morfológica do testículo, visando promover a seleção e o controle genético de exemplares que apresentem produção espermática apreciável ao longo do ano. A morfologia testicular de perdiz Rynchotus rufescens foi avaliada, analisando o peso do testículo, o diâmetro dos túbulos seminíferos, a espessura do epitélio seminífero, o número de figuras de meiose e a espessura da túnica albugínea. Foram utilizados 60 machos de perdizes, divididos em 12 grupos, sendo que um grupo por mês teve os testículos coletados para a rotina histológica e foram corados pela técnica de Hematoxilina-Eosina. Para a análise dos cortes histológicos, foram realizadas medidas morfométricas, com o auxílio de um Analisador de Imagem e os dados encontrados foram submetidos à análise de variância e teste de Tukey. Baseado nas modificações histológicas do epitélio seminífero e na análise morfométrica, a morfologia testicular da perdiz pôde ser dividida em quatro fases sucessivas ao longo do ano. A fase reprodutiva ocorreu na primavera, caracterizando-se pelo completo processo de espermatogênese. A fase de regressão aconteceu no verão, ocorrendo involução do epitélio seminífero. No outono ocorreu a fase de repouso, com a presença de espermatogônias e alguns...

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The Annual Testicular Cycle of the Domestic Quail (Coturnix coturnix japonica)

Cited by 18 publications

References 13 publications

Seasonal Variations in Spermatogenic Activity and Serum Testosterone Concentration in Japanese Quails

Seasonal Variations in Spermatogenic Activity and Serum Testosterone Concentration in Japanese Quails

Aspects of spermatogenesis and microscopic testicular morphology in Greater Rhea, Rhea americana (Linnaeus, 1758)

Morphometric study of Rynchotus rufescens testis throughout the year

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