Prevalence of blood parasites in seabirds - a review

Table 2 Parameter estimates of phylogenetically informed GLS models and GEE models for Plasmodium

Variables in best-fit model	Prevalence (GLS) N = 60 spp. (PCR data included, method included in model)	Presence/absence (GEE) N = 60 spp. (PCR data included)
Ecological parameters
Nesting (burrow = 1, others = 0)	0.063 ± 0.026, P = 0.018	3.408 ± 0.977, P = 0.004
Foraging (0 = nearshore, 2 = offshore)	- 0.014 ± 0.014, P = 0.301
Life-history parameters
Mean fledging period (days)	0.042 ± 0.060, P = 0.490	5.949 ± 2.045, P = 0.011
Method (smears or PCR)	0.051 ± 0.018, P = 0.006

Means ± s.e. are given. Only variables retained in the best-fit models are presented in the table. Excluded variables: body mass, chick development, maximum clutch size, mean incubation period, distribution

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