Parameters
|
Collared Peccary
|
Domestic Boara
|
Wild Boarb
|
| Gonadosomatic index, % |
0.2 |
0.4 |
0.3 |
| Seminiferous tubule, % |
77 |
83-85 |
87 |
| Sertoli cells per gram of testis, millions |
28 |
20 |
42 |
| Sertoli cell efficiency, spermatids per Sertoli cell |
11.1 |
12.4 |
6.6 |
| Meiotic index (%)c |
3.2 (20) |
3.2 (20) |
2.7 (33) |
| Leydig cells, % |
13 |
10 |
6 |
| Leydig cell individual size, µm3 |
1200 |
1100-2200 |
400 |
| Leydig cells per gram of testis, millions |
120 |
60-120 |
157 |
| Spermatogenic cycle length, d |
12.3 |
8.6-9 |
9 |
| Total duration of spermatogenesis, d |
55.1 |
38.7-40.5 |
40.5 |
Spermatogenic efficiency, DSP per gram of testis
|
23.4
|
24-27
|
29
|
|
| Abbreviation: DSP, daily sperm production. |
| a França (1992). |
| b Almeida et al (2006). |
| c Ratio of spermatids per primary spermatocytes (presumptive germ cell loss in
parentheses). |
|
