Table 4.
Results from ANCOVAs examining variation in fecundity, egg volume, clutch volume, and ovary weight of female Rastrineobola argentea in the Napoleon Gulf of Lake Victoria from 1966 to 2008–2010; as well as variation in fecundity of R. argentea in Lake Kyoga from 1991 to 2008–2010. SL refers to standard length (mm)
| Lake | Trait | Effect | df | F | P | R2 |
|---|---|---|---|---|---|---|
| Victoria | Log(Fecundity) | Year | 2,27 | 3.19 | 0.057 | 0.44 |
| SL | 1,27 | 0.99 | 0.330 | |||
| Year × SL | 2,27 | 3.91 | 0.032 | |||
| Victoria | Log(Egg volume) | Year | 1,33 | 15.80 | < 0.001 | 0.29 |
| Somatic weight | 1,33 | 5.83 | 0.022 | |||
| Victoria | Log(Clutch volume) | Year | 1,33 | 6.70 | 0.014 | 0.19 |
| Somatic weight | 1,33 | 10.09 | 0.003 | |||
| Victoria | Log(Ovary weight) | Year | 1,34 | 2.27 | 0.141 | 0.44 |
| Somatic weight | 1,34 | 23.34 | <0.001 | |||
| Kyoga | Log(Fecundity) | Year | 1,76 | 0.006 | 0.939 | 0.86 |
| Log(SL) | 1,76 | 154.25 | <0.001 |