Morphological Analysis of Testis of the Guinea Fowl ( Numida meleagris ) Under Tropical Savannah Climate of India

Abstract

The present study aimed to document the seasonal variations in the testicular morphology of the adult guinea fowl (Numida meleagris) under tropical savannah climate of India. The study was conducted in 24 adult healthy guinea cocks. The testes were ovoid in shape throughout the year. The consistency of the testes was moderately firm with great resilience and creamy white in colour during summer and monsoon-I whereas soft in consistency and dull white to yellowish tinge in colour during monsoon-II and winter seasons. The testicular weight, length, width, thickness, volume and circumference were higher during summer and monsoon I than the winter and monsoon II seasons. The mean body weight of the birds did not show significant difference among the seasons. The testicular weight, length, width, thickness, volume and circumference were higher during the summer and monsoon I than the winter and least during monsoon II in the current study. The gonadosomatic index (GSI) and paired testicular weight were high and showed no significant difference during the summer and monsoon-I whereas during winter and monsoon-II, the values were low and showed significant difference between them. The diameter of the seminiferous tubules and its lumen, the diameter of the sustentacular cells (Sertoli cells) were much higher during summer and Monsoon I than winter and monsoon II seasons. The percentage area of interstitial cells and the thickness of the testicular capsule appeared less during the summer and monsoon I seasons. The decreased size of seminiferous tubules, increased amount of cellular debris in the tubular lumen, degenerating germ cells and collapse of seminiferous tubules observed during monsoon II and winter in the present study.

Morphoanatomy and Gonadosomatic Index (GSI) of Testis of Turkey (Melagris gallopavo) at Different Ages

“…As shown in the Table 1, the GSI of 8, 16, and 24 turkeys were 0.96 ± 0.32%, 1.32 ± 0.42%, and 9.53 ± 8.26%, respectively. According to Dharani et al [17], the GSI relates to the efficiency of spermatozoa production in males. In this study, it was found that the GSI of the 24-week old turkeys largely increased compared to the previous age groups, RT LT reflecting that at the age of 24 weeks, sperm reproduction in turkeys was already very efficient.…”

Multivariate characterisation of morpho-biometric traits of indigenous helmeted Guinea fowl (Numida meleagris) in Nigeria

“…Additionally, the bird is used for different cultural purposes, and plays a role in poverty reduction among rural dwellers [ 11 ]. The bird also breeds seasonally and reaches its peak breeding activity during the summer period [ 12 ].…”

Morphometric and gross anatomy studies of gonads in day-old Arabic chick (Gallus turcicus) lead to gonadal asymmetry

“…Bright yellow in juveniles and grey-white in adults of the quails and ostrich. The bright yellow colour in juveniles is due to the accumulation of lipids in the interstitial cells and the grey-white colour in adults due to the spread of interstitial cells by enlarging seminiferous tubules after sexual maturity [20]. The results of this study, most of the testicle's colour in DOC Arab chickens is yellow-white (creamy), the findings of the other colours besides bright yellow, still have to be confirmed histologically to support the determination of its quality.…”