Predicted effects on fertilization of changes in egg target size and density
| . | . | . | Egg . | . | . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | . | . | Size . | . | Size and density . | . | |||
| Method/trial . | Experiment number . | N . | logFC50 . | Proportion change . | logFC50 . | Proportion change . | |||
| Acidification | 1 | 1.25 | 0.51 | 1.49 | 0.70 | ||||
| 2 | 1.01 | 0.37 | 1.26 | 0.51 | |||||
| 3 | 1.42 | 0.74 | 1.66 | 1.01 | |||||
| 4 | 1.19 | 0.82 | 1.44 | 1.13 | |||||
| 5 | 0.70 | 0.34 | 0.95 | 0.47 | |||||
| 6 | 1.38 | 0.57 | 1.62 | 0.79 | |||||
| 7 | 1.04 | 0.44 | 1.29 | 0.61 | |||||
| 8 | 0.64 | 0.41 | 0.89 | 0.56 | |||||
| 9 | 0.83 | 1.00 | 1.07 | 1.38 | |||||
| 10 | 0.81 | 0.33 | 1.06 | 0.46 | |||||
| Mean±S.E.M. | 10 | 1.03±0.09 | 0.55±0.07 | 1.27±0.09 | 0.76±0.10 | ||||
| Neutral/mechanical | 11 | 0.68 | 0.53 | 0.93 | 0.68 | ||||
| 12 | 1.21 | 0.61 | 1.46 | 0.83 | |||||
| 13 | 0.72 | 0.51 | 0.97 | 0.62 | |||||
| 14 | 1.29 | 0.55 | 1.53 | 0.75 | |||||
| 15 | 0.89 | 0.36 | 1.14 | 0.50 | |||||
| Mean±S.E.M. | 5 | 0.96±0.12 | 0.51±0.04 | 1.20±0.12 | 0.68±0.06 | ||||
| All trials | |||||||||
| Mean±S.E.M. | 15 | 1.00±0.07 | 0.54±0.05 | 1.25±0.07 | 0.73±0.07 | ||||
| . | . | . | Egg . | . | . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | . | . | Size . | . | Size and density . | . | |||
| Method/trial . | Experiment number . | N . | logFC50 . | Proportion change . | logFC50 . | Proportion change . | |||
| Acidification | 1 | 1.25 | 0.51 | 1.49 | 0.70 | ||||
| 2 | 1.01 | 0.37 | 1.26 | 0.51 | |||||
| 3 | 1.42 | 0.74 | 1.66 | 1.01 | |||||
| 4 | 1.19 | 0.82 | 1.44 | 1.13 | |||||
| 5 | 0.70 | 0.34 | 0.95 | 0.47 | |||||
| 6 | 1.38 | 0.57 | 1.62 | 0.79 | |||||
| 7 | 1.04 | 0.44 | 1.29 | 0.61 | |||||
| 8 | 0.64 | 0.41 | 0.89 | 0.56 | |||||
| 9 | 0.83 | 1.00 | 1.07 | 1.38 | |||||
| 10 | 0.81 | 0.33 | 1.06 | 0.46 | |||||
| Mean±S.E.M. | 10 | 1.03±0.09 | 0.55±0.07 | 1.27±0.09 | 0.76±0.10 | ||||
| Neutral/mechanical | 11 | 0.68 | 0.53 | 0.93 | 0.68 | ||||
| 12 | 1.21 | 0.61 | 1.46 | 0.83 | |||||
| 13 | 0.72 | 0.51 | 0.97 | 0.62 | |||||
| 14 | 1.29 | 0.55 | 1.53 | 0.75 | |||||
| 15 | 0.89 | 0.36 | 1.14 | 0.50 | |||||
| Mean±S.E.M. | 5 | 0.96±0.12 | 0.51±0.04 | 1.20±0.12 | 0.68±0.06 | ||||
| All trials | |||||||||
| Mean±S.E.M. | 15 | 1.00±0.07 | 0.54±0.05 | 1.25±0.07 | 0.73±0.07 | ||||
logFC50 is the sperm concentration predicted by the model to achieve 50% fertilization for eggs that have the size-independent properties of intact eggs but a size (or size and density) change equivalent to removal of the jelly coat.
`% change' gives the proportion of the total change in logFC50 from intact to coat-free eggs (data in Table 2) that is accounted for by the predicted logFC50. Mean values of % change were not significantly different between the two removal methods for size(t=0.52, P<0.61) or size and density (t=0.73, P<0.48).