Postnatal Development of Testis in Gaddi Goat (Capra hircus)

Abstract

SUMMARY:A study was conducted on the testicles of 30 male Gaddi goats, divided into 3 groups viz; prepubertal (0 day to 18 months), pubertal (<18 months to >5 yrs) and post-pubertal (>5 yrs) ages. The study revealed that the testis was covered by fibroserous tunica albuginia having outer fibrous layer and inner vascular layer with smooth muscle fibers at birth. The tunica albuginia continuously grew in thickness from prepubertal to postpubertal animals. The septula testis arising from the tunica albuginia, divided the parenchyma in lobules and converged at mediastinum testis. Few differentiated and undifferentiated Leydig cells were present in the intertubular spaces of neonates, which enormously increased in pubertal animals and replaced by fibroblasts in the postpubertal animals. The parenchyma comprised of solid sex cords in new born kids. These were converted into luminated tubules after 6 months of age and had clear cut tubuli contorti and tubuli recti leading to the mediastinum testis. In "0" day old kids, sex cords were filled with undifferentiated small cells located peripherally along the basement membrane and large primordial germ cells located centrally. By six months of age, latter started showing sign of degeneration and thus luminization of tubules started. Spermatogenesis startedin the seminiferous tubules of 12-18 months goat. In pubertal animals all the stages of spermatogenic cells and Sertoli cells were identified in the seminiferous tubules. The population of gonia cells and primary + secondary spermatocytes were 35% and 30% respectively. In postpubertal animals gonia cells were reduced to <30% and Primary + secondary spermatocytes were <20%. Many degenerating seminiferous tubules showed hyalinization, fibrosis and giant cells. The stroma and parenchyma ratio which was 35:65 at birth became 30:60 at 6 months, 25:75 at 12 months and 15:85 in pubertal and 20:80 in postpubertal animals. Increased stroma in last phase was associated with replacement of seminiuferous tubules by fibrous elements.

Morphological Studies on Epididymis and Vas Deferens of One - Humped Camel Bull (&lt;i&gt;Camelus dromedaries&lt;/i&gt;), Uda Ram and Red Sokoto Buck

“…The results on histomorphometry could not be adequately compared to the findings of other workers due to paucity of available relevant literature. However, some histomorphometric results obtained in this study are of much higher values than what where earlier observed in Malabari goats [30], Black Bengal bucks [31] and camel [29]. The different results may be due to sampling from different positions, different magnification or different calibrations.…”

Ex-situ Morphological and Morphometric Studies of the Testis In the West African Dwarf Buck GoatEx-situ Morphological and Morphometric Studies of the Testis In the West African Dwarf Buck Goat

“…In this study, we observed that the gross morphological characteristics of the WAD buck testis were similar to those previously reported in Indian buck goats (Nimase et al, 2008;Mohammed et al, 2011;Archana et al, 2014). This suggests that there are no distinct testicular morphological variations amongst these breeds of goats.…”

“…Data on STD, SLD and GEH in WAD buck goats are very scarce. However, the mean STD we observed for the right and left testes (578.2 ± 27.8 µm and 569.4 ± 26.1 µm respectively) were higher than those reported in pubertal and post pubertal Indian indigenous Gaddi buck goats (202.55 ± 4.49 µm and 263.52 ± 5.22 µm respectively) by Archana et al, (2014); in Lori goats (197.20 ± 1.80 µm) by Mohammadzadeh et al, (2013) and in Alpine buck goats (237 ± 3.0 µm) by Leal et al, (2004). Also, the mean GEH we observed (194.9 ± 28.8 µm and 198.6 ± 27.2 µm respectively) were higher than those reported in the Lori goat (39.2 ± 0.98 µm) by Mohammadzadeh et al, (2013) and in the Alpine bucks (78 ± 2.0 µm) by Leal et al, (2004).…”

Biometrical and histomorphometrical changes of testis in the dynamics of postnatal ontogenesis from birth to puberty of Black Bengal goat

“…To understand the postnatal growth and maturation of the genital system or organs, postnatal biometrical and histomorphometrical research until puberty is essential. Sporadic reports on the biometry and histomorphometry of the testis of Assam goats [ 6 ], Balami goats, Uda goats, Yankasa goats [ 7 ], Gaddi goats [ 8 ], and Japanese Tokara goats [ 9 ] are available. Despite being the sole breed of goat in Bangladesh, the Black Bengal, no systematic research on the testicular postnatal development of the Black Bengal goat breed has been done.…”