Table 1.
Frequency matrices for predictability, constancy and contingency across the photo-induced change in GnRH1 cell numbers and peripheral physiology across the reproductive cycle in European starlings. (OD, optical density; SD, short day; LD, long day. Data taken from Stevenson et al. [35].)
| SD (8 L : 16 D) | LD 3 weeks | LD 4 weeks | LD 5 weeks | LD 7 weeks | LD 9 weeks | |
|---|---|---|---|---|---|---|
| GnRH OD | ||||||
| 0–2 | 2 | 1 | 0 | 0 | 2 | 6 |
| 2.1–4 | 2 | 1 | 2 | 2 | 1 | 2 |
| 4.1–6 | 2 | 1 | 3 | 2 | 2 | 0 |
| 6.1–8 | 2 | 3 | 1 | 0 | 1 | 0 |
| 8.1–10 | 0 | 0 | 0 | 2 | 1 | 0 |
| 10.1–12 | 0 | 2 | 2 | 2 | 1 | 0 |
| P = 0.26; C = 0.03; M = 0.23; C/P = 14%; M/P = 86%; Ie = 7.66; GM = 39.5; p < 0.05; GC = 10.2; p > 0.05; GP = 49.8; p < 0.001 | ||||||
| gonad volume | ||||||
| 0–200 | 8 | 0 | 0 | 1 | 3 | 8 |
| 201–400 | 0 | 2 | 3 | 1 | 3 | 0 |
| 401–600 | 0 | 3 | 1 | 3 | 1 | 0 |
| 601–800 | 0 | 1 | 2 | 3 | 0 | 0 |
| 801–1000 | 0 | 2 | 1 | 0 | 1 | 0 |
| 1001–1200 | 0 | 0 | 1 | 0 | 0 | 0 |
| P = 0.62; C = 0.14; M = 0.47; C/P = 23%; M/P = 76%; Ie = 3.35; GM = 61.7; p < 0.001; GC = 29.5; p < 0.001; GP = 90.7; p < 0.001 | ||||||