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Table 3 Data collected on relative abundance (RA = birds counted per hour) and capture success (CS = successful attempts relative to total attempts, in %), during 4 h of work per day in each of 4 quadrats of 100 m × 100 m (Plot 1–4), with 3 days each in Densu Delta Ramsar Site (DDRS) and Weija Lake (WL)

From: Abundance and prey capture success of Common Terns (Sterna hirundo) and Pied Kingfishers (Ceryle rudis) in relation to water clarity in south-east coastal Ghana

Study site Plot # Pied Kingfisher Common Tern
RA (birds/hour) CS (%) RA (birds/hour) CS (%)
DDRS 1 2.0 41.2 0
DDRS 2 5.5 41.2 0.5 22.2
DDRS 3 3.0 40.0 0
DDRS 4 4.3 31.8 1.5 33.3
DDRS 1 3.5 45.9 17.0 29.3
DDRS 2 2.3 55.6 3.8 43.5
DDRS 3 2.5 75.0 6.5 41.8
DDRS 4 2.5 52.9 11.5 34.8
DDRS 1 6.3 27.8 4.3 31.3
DDRS 2 3.5 23.1 1.8 55.6
DDRS 3 2.0 21.4 4.8 42.9
DDRS 4 2.5 28.6 9.3 18.2
WL 1 2.5 28.6
WL 2 2.0 27.3
WL 3 3.3 36.8
WL 4 2.8 33.3
WL 1 1.3 23.1
WL 2 1.8 38.5
WL 3 1.8 35.7
WL 4 1.8 30.0
WL 1 2.8 19.0
WL 2 2.0 16.7
WL 3 2.8 31.6
WL 4 3.0 28.6
Mean ± SD 2.8 ± 1.2 34.7 ± 13.1 5.1 ± 5.2 35.3 ± 11.0
  1. Note that Common Terns were not observed at WL, hence n = 12. RA = birds counted per hour; CS = successful attempts relative to total attempts, in %