Effect of photoperiod length on body mass and testicular growth in the house sparrow 
(<i>Passer domesticus</i>) and brahminy myna 
(<i>Sturnus pagodarum</i>)

Bhardwaj, Sanjay Kumar; Anushi,

doi:10.1051/rnd:2005065

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…In the animals of the present study, a positive correlation was observed between the degree of spermatogenic development and the diameter of the seminiferous tubules (Table ). Thus, in accordance with all the findings that indicated a higher reproductive activity in A. leucophthalma and in other species of birds studied (Wikelski et al., ; Kim and Yang, ; Madekurozwa et al., ; Bhardwaj and Anushi, ), the diameter of the seminiferous tubules and the degree of spermatogenic development were significantly higher in the spring than in the fall (Table ).…”

Section: Discussionsupporting

confidence: 90%

“…The seasonal reproductive activity observed in male birds describes a cyclical activity involving phases of quiescence during the period of reproduction rest and of spermatogenic recrudescence during the mating periods (Lofts and Murton, ). Then, similarly to what happens to other seasonal birds throughout the year, different degrees of spermatogenic development were observed in A. leucophthalma , directly related to the testicular size, volumetric proportion and the diameter of the seminiferous tubules (Wikelski et al., ; Kim and Yang, ; Madekurozwa et al., ; Bhardwaj and Anushi, ). In the animals of the present study, a positive correlation was observed between the degree of spermatogenic development and the diameter of the seminiferous tubules (Table ).…”

Section: Discussionmentioning

confidence: 69%

“…() indicate a strong correlation between the duration of the daily luminosity and the degree of testicular development in tropical passeriforme. In the study of Bhardwaj and Anushi (), this influence is also strongly observed in the control of the reproductive cycle in birds of temperate regions.…”

Section: Discussionmentioning

confidence: 83%

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Morphofunctional Evaluation of the Testicle and the Spermatogenic Process of Adult White‐Eyed Parakeets (Aratinga leucophthalma MULLER, 1776) During the Different Seasons of the Year

Peixoto

Paula

Balarini

et al. 2012

Anat Histol Embryol

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In this experiment, testicle fragments of 14 adult White-eyed Parakeets (Aratinga leucophthalma) were evaluated as for their seasonal reproductive activities using the following quantitative parameters: average thickness of the testicular tunica albuginea, volumetric proportion of tubular and extratubular compartments, average diameter of the seminiferous tubules and corporal weight. Parameters were created for qualitative evaluations of the degree of spermatogenic development. In this experiment, all the animals were distributed into four groups, and their testicular fragments were collected during the middle of summer, fall, winter and spring. The animals were submitted to volatile general anaesthesia, and a biopsy was made by celioscopy. The fragments collected were processed histologically. The slides were prepared and later evaluated by using an optical microscope. The average seasonal values of the corporal weight increased, starting in the winter and reaching the peak during the spring. A seasonal testicle cycle was observed, because, in the spring, the testicles showed values for the quantitative and qualitative parameters of spermatic production compatible with the period of greater activity, while the opposite thing happened during the fall. Our data indicate that the parameters of sperm production may be correlated with daily light rather than with air humidity.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 69%

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Morphofunctional Evaluation of the Testicle and the Spermatogenic Process of Adult White‐Eyed Parakeets (Aratinga leucophthalma MULLER, 1776) During the Different Seasons of the Year

Peixoto

Paula

Balarini

et al. 2012

Anat Histol Embryol

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“…These measures also tended to change in tandem with changes in age and body weight. A similar relationship was reported by Bhardwaj and Anushi (2006) in house sparrows ( Passer domesticus ) and by Deviche et al . (2001) in dark-eyed junco ( Junco hyernalis) under the altered photoperiod regimens.…”

Section: Discussionsupporting

confidence: 90%

Allometric Growth of Testes in Relation to Age, Body Weight and Selected Blood Parameters in Male Japanese Quail (Coturnix japonica)

Vatsalya

Arora

2012

International J. of Poultry Science

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The Japanese quail is a very valuable animal model for research in a variety of biological disciplines. The purpose of this study was to characterize and interrelate age-dependent testicular parameters with various blood constituents: blood glucose, plasma proteins and packed cell volume that are developing concurrently in the growing bird. Another objective of the study was to identify selective physioanatomical markers for predicting the testicular growth and the onset of sexual maturity. Male Japanese quail hatchlings were raised in temperature controlled brooders for up to 3 weeks of age under a constant light and then shifted to hanging cages in an air conditioned room set at ~73° F under a 14L: 10D lighting system and ad libitum access to feed and water. Starting d8, a group of 8–10 birds of uniform size and weight were selected randomly at 4-day intervals up to d52 of age for the project. The birds were weighed and blood sampled using the brachial vein and Blood Glucose (BGL), Total Plasma Proteins (PP) and Packed Cell Volume (PCV) levels were measured prior to euthanization. The testes were removed and measured for weight, length, width and Volume (VOL). All the testicular measurements were then correlated with age and body weight. The left testes were larger than the right testes and their differences were evident at d36 of age. Testicular measurements also reflected two distinct growth surges at d28, d32 and d36 of age. Combined Testes Weight (CTW) and Combined Testes Volume (CTV) revealed a strong positive correlation with PCV and PP and a negative correlation with Blood Glucose Level (BGL). Accordingly, these measurements could serve as reliable markers of growth rate and sexual maturation in male Japanese quail.

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“…these data tend to increase in increased body weight and age. A similar pattern of relationship was reported in sparrows (Passer domesticus) [19] . A positive relationship among various physiological traits was also published in male Japanese quail [15] .…”

Section: Discussionsupporting

confidence: 82%

Growth of Japanese Quail Testes in Relation to Age: Morphological and Immunohistochemical Observation

Alam

Rahman

Islam

et al. 2021

Egyptian Journal of Histology

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Objective: The purpose of this research was to observe the age-related growth and histomorphological changes in Japanese quail testes from post-hatching to sexual maturity as well as spermatogenesis. Materials and Methods: After collection, the testes weight, length, width, and index analysis were performed, and histomorphological, histological and immunohistochemical observations were conducted using hematoxylin-eosin, PAShematoxylin, and anti-Hsc70t staining, respectively at different ages. Results:The weight of the testes increased gradually with age and reached a peak at 70 days. The length and width of the testes were maximal at 70 days. The testis index was positively correlated with age and body weight (BW) toward sexual maturity. Histologically, at 15 days of age, the seminiferous tubules (STs) remained in immature state with undifferentiated spermatogenic cells of only one to two layers of epithelial cells. At 28 days, the spermatogenic cells were differentiated from spermatogonia to spermatocytes. At 42 days, remarkable enlargement of STs with a series of spermatogenic cell development up to the round spermatids and Leydig cells in the interstitial region. Finally, at 70 days, extremely enlarged STs containing all stages of spermatogenic cells. The diameter and height of STs were maximal at 70 days than that of 42 days of age. A strong Hsc 70t immunoreaction was found in the round to elongated spermatids/spermatozoa near to the lumen of STs, clearly indicating well-characterized spermatogenesis in quail testis at 70 days of age. Conclusion:The findings may contribute to our understanding of quail's spermatology and provide basic knowledge for reproductive toxicology, physiology and pathology studies.

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Effect of photoperiod length on body mass and testicular growth in the house sparrow (Passer domesticus) and brahminy myna (Sturnus pagodarum)

Abstract: -Two experiments studied the relative effects on body mass and testicular growth of stimulatory photoperiods applied simultaneously to two photosensitive species, the house sparrow (Passer domesticus) and brahminy myna (Sturnus pagodarum).

Cited by 8 publications

References 33 publications

Morphofunctional Evaluation of the Testicle and the Spermatogenic Process of Adult White‐Eyed Parakeets (Aratinga leucophthalma MULLER, 1776) During the Different Seasons of the Year

Morphofunctional Evaluation of the Testicle and the Spermatogenic Process of Adult White‐Eyed Parakeets (Aratinga leucophthalma MULLER, 1776) During the Different Seasons of the Year

Allometric Growth of Testes in Relation to Age, Body Weight and Selected Blood Parameters in Male Japanese Quail (Coturnix japonica)

Growth of Japanese Quail Testes in Relation to Age: Morphological and Immunohistochemical Observation

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