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Table 2 Measurements of B. altianalis oocytes for fish obtained from Lake Edward. Data are shown as mean ± SD

From: Optimizing selection of sexually mature Barbus altianalis for induced spawning: determination of size at sexual maturity of populations from Lake Edward and Upper Victoria Nile in Uganda

Lake Edward
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 oocytes      
Oogonia 14.14 ± 2.97 9.21 ± 1.76 0.65 ± 0.83 194
Chromatin nucleolar oocytes 51.10 ± 12.11 22.14 ± 5.10 3.89 ± 2.867 0.44 ± 0.10 159
Perinucleolar oocytes 162 ± 52.98 72.76 ± 27.13 17.66 ± 5.39 0.42 ± 0.13 259
2 Cortical alveolar 325.30 ± 45.34 122.75 ± 29.11 34.04 ± 13.16 0.38 ± 0.08 100
3 Vtg1 oocytes 530.64 ± 91.83 125.47 ± 37.35 46.97 ± 28.28 0.24 ± 08 80
4 Vtg2 oocytes 724.12 ± 120.56 166.81 ± 51.00 38.61 ± 14.25 0.22 ± 0.06 92
5 Vtg3 oocytes 1046.21 ± 397.41 155.26 ± 68.46 38.6 ± 13.35 0.14 ± 0.04 111
6 Mature oocytes 1510.67 ± 182 196.34 ± 42.70 26.14 ± 13.40 0.143 ± 0.04 85