Table 2 Correlation between egg-spot matching (between cuckoo and warbler eggs) in parasitized nests and availability of host nests synchronized with cuckoo egg-laying
Assessment method | Egg section | Variables | Linear regression equation | R | F | p |
|---|---|---|---|---|---|---|
One-egg assessment | Side | Spot size (mm2) | Spot size = 0.198 − (0.00189 × nest availability) | 0.137 | 0.704 | 0.407 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.418 − (0.00575 × nest availability) | 0.409 | 7.436 | 0.01 |
|  |  | Spot coverage (%) | Spot coverage = 10.412 − (0.0918 × nest availability) | 0.229 | 2.048 | 0.161 |
|  | Sharp | Spot size (mm2) | Spot size = 0.168 + (0.00150 × nest availability) | 0.128 | 0.618 | 0.437 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.679 − (0.0108 × nest availability) | 0.353 | 5.255 | 0.028 |
|  |  | Spot coverage (%) | Spot coverage = 18.364 − (0.0349 × nest availability) | 0.0475 | 0.0837 | 0.774 |
|  | Blunt | Spot size (mm2) | Spot size = 0.0955 + (0.000157 × nest availability) | 0.0171 | 0.0109 | 0.918 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.721 − (0.0124 × nest availability) | 0.446 | 9.207 | 0.004 |
|  |  | Spot coverage (%) | Spot coverage = 12.079 − (0.127 × nest availability) | 0.227 | 2.004 | 0.165 |
|  |  | Spot distribution | Spot distribution = 11.586 − (0.124 × nest availability) | 0.219 | 1.867 | 0.18 |
The whole clutch assessment | Side | Spot size (mm2) | Spot size = 0.191 − (0.00141 × nest availability) | 0.0912 | 0.31 | 0.581 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.522 − (0.00642 × nest availability) | 0.411 | 7.534 | 0.009 |
|  |  | Spot coverage (%) | Spot coverage = 12.154 − (0.127 × nest availability) | 0.269 | 2.886 | 0.098 |
|  | Sharp | Spot size (mm2) | Spot size = 0.0700 + (0.0000734 × nest availability) | 0.015 | 0.0083 | 0.928 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.775 − (0.0114 × nest availability) | 0.268 | 2.87 | 0.099 |
|  |  | Spot coverage (%) | Spot coverage = 11.563 − (0.0948 × nest availability) | 0.115 | 0.496 | 0.486 |
|  | Blunt | Spot size (mm2) | Spot size = 0.177 + (0.00106 × nest availability) | 0.0892 | 0.297 | 0.589 |
|  |  | Spot density (No. of spots/mm2) | Spot density = 0.588 − (0.00799 × nest availability) | 0.321 | 4.261 | 0.046 |
|  |  | Spot coverage (%) | Spot coverage = 19.542 − (0.0802 × nest availability) | 0.108 | 0.441 | 0.511 |
|  |  | Spot distribution | Spot distribution = 0.412 + (0.0131 × nest availability) | 0.203 | 1.593 | 0.215 |