Table 3 Measurements of B. altianalis oocytes for fish obtained from Upper Victoria Nile; Data are shown as mean ± SD
River Nile | ||||||
|---|---|---|---|---|---|---|
No | Oocyte type | Average cell size (μm) recorded for diameter | Nucleus size (μm) recorded for diameter | Estimated number of nucleoli for each egg | Ratio between oocyte and nuclei sizes | Total number of oocytes measured |
1 | Primary growth oocyte | |||||
Oogonia | 13.95 ± 2.97 | 9.40 ± 1.82 | – | 0.64 ± 0.10 | 168 | |
Chromatin nucleolar | 48.85 ± 10.47 | 21.23 ± 4.36 | 1.81 ± 1.17 | 0.44 ± 0.10 | 175 | |
Perinucleolar oocytes | 162 ± 64.82 | 67.40 ± 36.90 | 16.84 ± 7.94 | 0.32 ± 0.13 | 364 | |
2 | Cortical alveolar | 330.63 ± 62.75 | 121.93 ± 28.23 | 31.40 ± 9.43 | 0.37 ± 0.76 | 134 |
3 | Vtg1 oocytes | 502.88 ± 114.97 | 124.04 ± 0.34 | 28.82 ± 9.23 | 0.27 ± 0.07 | 102 |
4 | Vtg2 oocytes | 767.40 ± 124.08 | 154.02 ± 46.16 | 29.67 ± 12.06 | 0.21 ± 0.07 | 96 |
5 | Vtg3 oocytes | 1036.60 ± 286.93 | 160.56 ± 0.042 | 21.90 ± 9.37 | 0.15 ± 0.044 | 82 |
6 | Mature oocytes | 1540.05 ± 184.68 | 204.31 ± 76.34 | 22.32 ± 15.30 | 0.135 ± 0.04 | 80 |