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Table 1 Breeding parameters of the Maghreb Magpie (Pica mauritanica) recorded during 2017 and 2018 breeding seasons in Tunisia (Sbikha)

From: Breeding biology of a relictual Maghreb Magpie (Pica mauritanica) population in Tunisia

Breeding parameter 2017 2018 Years combined Test for difference between years
Active nests 13 20 33
Replacement clutches 1 0 1
Range of clutch size 4–7 3–6 3–7
Modal clutch 6 4 6
Total number of eggs laid in the colony 75 90 165
Mean clutch size ± SE 5.77 ± 0.69 4.50 ± 0.18 5.00 ± 0.19 Z = 3.56, P = 0.000
Egg hatching rate (%) 55% 57% 56% χ21 = 0.066, P = 0.796
Hatching success ± SE 3.15 ± 0.54 2.55 ± 0.44 2.78 ± 0.34 Z = 0.99, P = 0.321
Fledging success ± SE 2.07 ± 0.48 1.45 ± 0.38 1.69 ± 0.30 Z = 0.89, P = 0.369
Nestling survival rate (%) 66% 57% 61% χ21 = 0.771, P = 0.379
Breeding success (%) 36% 32% 34% χ21 = 0.260, P = 0.609
Nest survival (%) 85% 75% 79% χ21 = 0.435, P = 0.509
Fledging survival (%) 82% 73% 77% χ21 = 0.257, P = 0.611
Rate of successful nest (%) 69% 55% 61% χ21 = 0.668, P = 0.413
  1. SE standard error