Scrotal Circumference and Its Relationship with Testicular Growth, Age, and Body Weight in Tho Tho (Bos indicus) Bulls

Table 1

Scrotal circumference, testicular, and seminal parameters of Tho Tho (Bos indicus) bulls at different ages (mean ± S.E.).

Scrotal and testicular characters	18–24 months ()	25–36 months ()	37–48 months ()	49 months and above ()
Age	20.83 ± 1.52^a	30.50 ± 2.12^b	42.50 ± 2.24^c	55.33 ± 2.08^d
Body weight (Kg)	219.33 ± 4.31^a	282.83 ± 4.01^b	323.17 ± 5.47^c	423.83 ± 5.56^d
Scrotal circumference (cm)	27.97 ± 1.18^a	30.00 ± 1.05^b	31.28 ± 0.98^bc	32.27 ± 1.22^c
Left testes length (cm)	8.84 ± 0.68^a	9.63 ± 0.59^b	9.63 ± 0.66^b	9.78 ± 0.60^b
Left testes width (cm)	5.72 ± 0.52^a	5.77 ± 0.54^a	6.58 ± 0.44^b	6.82 ± 0.38^b
Left testes thickness (cm)	5.88 ± 0.61^a	6.23 ± 0.38^b	6.45 ± 0.37^bc	6.87 ± 0.40^c
Left testes volume (cm^3)	146.53 ± 4.12^a	181.46 ± 4.68^b	213.80 ± 4.23^c	239.05 ± 4.64^d
Left testes estimated weight (gm)	152.09 ± 4.20^a	188.35 ± 4.74^b	221.93 ± 4.20^c	248.13 ± 4.38^d
Right testes length (cm)	9.74 ± 0.69^a	10.03 ± 0.61^ab	10.40 ± 0.77^b	10.25 ± 0.60^ab
Right testes width (cm)	6.11 ± 0.52^a	6.26 ± 0.49^a	6.99 ± 0.41^b	7.19 ± 0.37^b
Right testes thickness (cm)	6.21 ± 0.48^a	6.67 ± 0.50^b	6.85 ± 0.53^bc	7.12 ± 0.43^c
Right testes volume (cm^3)	191.66 ± 5.78^a	219.25 ± 4.56^a	260.37 ± 5.26^b	272.48 ± 4.12^b
Right testes estimated weight (gm)	198.95 ± 5.42^a	227.58 ± 4.98^a	270.26 ± 5.09^b	282.83 ± 4.20^b
Total volume (cm^3)	338.19 ± 6.59^a	400.71 ± 6.75^b	474.17 ± 6.29^c	511.53 ± 5.24^c
Total weight (gm)	351.04 ± 6.71^a	415.94 ± 6.88^b	492.19 ± 6.40^c	530.97 ± 5.32^c

Figures in parenthesis indicate number () of Tho Tho cattle bulls.
Figures with same superscript (a, b, c, and d) do not differ significantly in rows.