biologia - Studia
biologia - Studia
biologia - Studia
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PLATFORM INITIATION, CLUTCH INITIATION AND CLUTCH SIZE IN COLONIAL GREAT CRESTED GREBES<br />
Table 2.<br />
Average full clutch size of grebe nests in the Reeds in relation to the date of platform<br />
initiation (in parentheses number of clutches).<br />
Date of In March 1-10 April 11-20 April After 20 April One-way ANOVA Tukey test<br />
platform<br />
start<br />
Mean ± SD Mean ± SD Mean ± SD Mean ± SD F-<br />
value<br />
df P Periods that<br />
differ (P)<br />
2003 Reed I 3.72 ± 0.75 (18) 3.88 ± 1.25 (8) 3.75 ± 0.50 (4) 3.60 ± 0.55 (5) 0.1 3,31 0.95<br />
2004<br />
2005<br />
2006<br />
All<br />
years<br />
Reed II 4.00 ± 0.75 (26) 3.91 ± 0.83 (11) 3.38 ± 1.06 (8) 3.29 ± 0.76 (7) 2.2 3,48 0.10<br />
Total 3.89 ± 0.75 (44) 3.89 ± 0.99 (19) 3.50 ± 0.90 (12) 3.42 ± 0.67 (12) 1.6 3,83 0.19<br />
Reed I 4.38 ± 0.74 (8) 4.20 ± 0.42 (10) 4.00 ± 0 (6) 4.00 ± 0.81 (4) 0.7 3, 24 0.57<br />
Reed II 4.17 ± 0.58 (12) 3.86 ± 0.38 (7) 3.70 ± 0.67 (10) 3.75 ± 0.50 (4) 1.4 3, 29 0.26<br />
Total 4.25 ± 0.64 (20) 4.06 ± 0.43 (17) 3.81 ± 0.54 (16) 3.88 ± 0.64 (8) 2.0 3, 57 0.12<br />
Reed I 4.23 ± 1.01 (13) 4.00 ± 0.58 (7) 3.40 ± 1.34 (5) 3.67 ± 0.58 (3) 1.0 3, 24 0.41<br />
Reed II 4.90 ± 1.34 (21) 4.33 ± 0.89 (12) 3.67 ± 0.87 (9) 3.75 ± 0.46 (8) 4.0 3, 46 0.013 1-3 (