2007
DOI: 10.1590/s1519-69842007000200024
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Abstract: 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 on… Show more

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Cited by 9 publications
(5 citation statements)
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“…The present study provides a detailed morphological description of the reproductive system of the smooth‐billed ani and reports about intense reproductive remodeling as evidence of opportunistic breeding behavior following rainfall variations in a semiarid area. The findings of this study (1) showed that the reproductive morphology of the smooth‐billed ani was similar to that observed in other birds such as domestic quail, fowl, emu, ostrich, goose, parakeet and drake (Aire, 2002; Aire & Soley, 2000; Leska, Kiezun, Kaminska, & Dusza, 2015; Parizzi et al, 2008; Peixoto et al, ; Reed, Cope, & Blackford, 2011); (2) indicated intense gonadal activity throughout the wet season that was consistently similar to what is described in other birds during the breeding season (Baraldi‐Artoni et al, ; Kim & Yang, ; Leska & Dusza, ; Peixoto et al, ; Tae et al, ); (3) and revealed remarkable signs of gonadal involution and low gametogenic activity after precipitation decreased. Birds inhabiting areas with adverse climate characteristics exhibit flexibility with regard to the timing and intensification of breeding activity whenever environmental conditions are satisfactory to ensure reproductive success and offspring survival (Cruz‐McDonnell & Wolf, ; Dybala, Eadie, Gardali, Seavy, & Herzog, ; Quintero, González‐Caro, Zalamea, & Cadena, ; Sandoval, ; Selwood et al, ).…”
Section: Discussionsupporting
confidence: 83%
See 1 more Smart Citation
“…The present study provides a detailed morphological description of the reproductive system of the smooth‐billed ani and reports about intense reproductive remodeling as evidence of opportunistic breeding behavior following rainfall variations in a semiarid area. The findings of this study (1) showed that the reproductive morphology of the smooth‐billed ani was similar to that observed in other birds such as domestic quail, fowl, emu, ostrich, goose, parakeet and drake (Aire, 2002; Aire & Soley, 2000; Leska, Kiezun, Kaminska, & Dusza, 2015; Parizzi et al, 2008; Peixoto et al, ; Reed, Cope, & Blackford, 2011); (2) indicated intense gonadal activity throughout the wet season that was consistently similar to what is described in other birds during the breeding season (Baraldi‐Artoni et al, ; Kim & Yang, ; Leska & Dusza, ; Peixoto et al, ; Tae et al, ); (3) and revealed remarkable signs of gonadal involution and low gametogenic activity after precipitation decreased. Birds inhabiting areas with adverse climate characteristics exhibit flexibility with regard to the timing and intensification of breeding activity whenever environmental conditions are satisfactory to ensure reproductive success and offspring survival (Cruz‐McDonnell & Wolf, ; Dybala, Eadie, Gardali, Seavy, & Herzog, ; Quintero, González‐Caro, Zalamea, & Cadena, ; Sandoval, ; Selwood et al, ).…”
Section: Discussionsupporting
confidence: 83%
“…After rainfall ceased, the gonads of the smooth‐billed ani as well as the reproductive accessory organs were significantly involuted compared to those in the wet season, but they did not undergo complete gonadal collapse as observed in seasonal birds (Artoni, Orsi, Carvalho, & Lopes, ; Baraldi‐Artoni et al, ). Instead, the histological findings in males showed that the testes were maintained at the early recrudescence stage with numerous proliferating spermatogonia and early meiotic spermatocytes in the seminiferous tubules, whereas spermatids and luminal spermatozoa were only occasionally observed; females presented no preovulatory follicles, but sporadic postovulatory follicles were found throughout the dry season, indicating random ovulatory activity.…”
Section: Discussionmentioning
confidence: 91%
“…The male reproductive organs of seasonal breeders grow and regress under the influence of light, temperature, rainfall, and food availability (Lake 1981; Lofts andMurton 1968, 1973;Scott and Middleton 1968). Compared with other classes of vertebrates, seasonal changes in avian gonads have been studied in far less detail and have been confined to a comparatively small number of avian species, including swans (Breucker 1982), penguins (Fuenzalida et al 1989), quails (Baraldi-Artoni et al 1999), Nothura maculosa (Burger 1949), and partridge (Baraldi-Artoni et al 2007). The usefulness of a number of histological parameters to characterize the seasonal testicular cycle in bird testes, such as the diameter of the seminiferous tubules, height of the seminiferous epithelium, thickness of the tunica albuginea, number of germinal and the interstitial cells, has been explored (Fuenzalida et al 1989; Baraldi-Artoni et al 1997).…”
Section: Introductionmentioning
confidence: 99%
“…Baraldi Artoni et al (2007) studied the morphometry of seminiferous tubules of the Red-winged Tinamou (Rynchotus rufescens) throughout the year, morphological alterations in the tubules were reported, regarding height and diameter of the epithelium, these alterations were related to seasons of year, presenting periods of sexual activity and repose, the period during which activity was at its highest corresponded to spring (September) and lowest activity happened during winter (July (2007). The seasonal alteration is clear, since during activity, the interstice is narrow and during repose, it is large, this is due to an expansion of the seminiferous tubules during sexual activity, which compresses the interstice, while during repose the retraction of the tubules allows enough space for an expansion of the interstice.…”
Section: Resultsmentioning
confidence: 99%