temps (durée) (1) échantillonnage (1) archipel (1) investigation (1) comparaison (1) méthode (1) nidification (1) Comparison (1) Colonies (1) Methods (1) Surveys (1) Weights and measures (1) Time (1) Surveys (1) Struggle (1) Science (1) Sampling (1) Probabilities (1) Performances (1) Gulls (1) Estimates (1) Colonies (1) Average (1) Addition (1) Methods (1) Nests (1) Utilization (1) Detection (1) Sizes (1) Sampling (1)