Productivity and fledging rate decreased slightly through time, and both values
decreased before policy changes, although the differences were not statistically
significant (Productivity: 0.37 vs. 0.29; Fledging rate: 0.54 vs. 0.46, Fig. 15.11).
Between 1994 and 2011 we documented a total of 65 cases of mortality.
Survival decreased with time in all age classes (adults, >6 years old: r s = −0.60,
P = 0.0091; subadults, 4–5 years old: r s = −0.56, P = 0.0147; juveniles, 1–3 years
old: r s = −0.48, P = 0.042, n = 18). Annual survival differences did not coincide
Fig. 15.9 Inter-annual variation in laying dates in the bearded vulture. 0 = 1st December
(Margalida et al. 2014a)
Fig. 15.10 Variation in the clutch size in the bearded vulture in the Pyrenees. Orange columns
double (2-egg clutches); blue columns simple (1-egg clutches) (Margalida et al. 2014a)
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decreased before policy changes, although the differences were not statistically
significant (Productivity: 0.37 vs. 0.29; Fledging rate: 0.54 vs. 0.46, Fig. 15.11).
Between 1994 and 2011 we documented a total of 65 cases of mortality.
Survival decreased with time in all age classes (adults, >6 years old: r s = −0.60,
P = 0.0091; subadults, 4–5 years old: r s = −0.56, P = 0.0147; juveniles, 1–3 years
old: r s = −0.48, P = 0.042, n = 18). Annual survival differences did not coincide
Fig. 15.9 Inter-annual variation in laying dates in the bearded vulture. 0 = 1st December
(Margalida et al. 2014a)
Fig. 15.10 Variation in the clutch size in the bearded vulture in the Pyrenees. Orange columns
double (2-egg clutches); blue columns simple (1-egg clutches) (Margalida et al. 2014a)
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369