diurnal distribution

Fig. 1. 2c and 3c+ Dunlin on the Falsterbo peninsula, the number of birds caught and investigated per hour, June - September. The birds are ringed and investigated immediately or at most less than an hour after being caught. m = moulting, nm = non-moulting.









cumulatice percent distribution

Fig. 2. Cumulative percentage distribution of the four categories in Fig. 1 between 00h and 08h. m = moulting, nm = non-moulting.









nm 2c/3c+ weight versus time

Fig. 3. WEIGHT versus TIME (blue line) and mean weights per hour (red curve) in non-moulting 2c and 3c+ Dunlin, 00h - 10h. Only positions shown, central points will indicate more than one value.









m 2c/3c+ weight versus time

Fig. 4. WEIGHT versus TIME (blue line) and mean weights per hour (red curve) in 2c and 3c+ Dunlin with initiated moult, 00h - 10h. Only positions shown, central points will indicate more than one value.









gapsizeagainsttime

Fig. 5. Mean gap size ± 1 s.e. versus time in 2c (black line) and 3c+ (red line) Dunlin with initiated moult, 00h - 05h. Sample sizes given next to each point, 2c above 3c+.









weight versus gaps

Fig. 6. Transformed weight (wing: 118 mm, 00h) versus moult gap size in 3c+ Dunlin, linear regression: WEIGHT = 46.17 + 1.07 GAP. Radj2 = 1.0 %; F = 2.17 (p = 0.142). Gap size measured in tenths of full-grown primaries, only positions shown, central points will indicate more than one value.









weight versus gaps

Fig. 7. Transformed weight (wing: 118 mm, 00h) versus moult gap size in 2c Dunlin, quadratic regression: WEIGHT = 47.5 - 3.12 GAP + 2.49 GAP2. Radj2 = 1.1 %; F = 2.6 (p = 0.074). Gap size measured in tenths of full-grown primaries, only positions shown, central points will indicate more than one value.




3c+weightmeansversusgaps

Fig. 8. Mean values ± 1 s.e. of transformed weights (wing: 118 mm, 00h) versus moult gap size in 3c+ Dunlin, linear regression, single points (framed) not included in the calculation. Gap size measured in tenths of full-grown primaries.




2cweightmeansversusgaps

Fig. 9. Mean values ± 1 s.e. of transformed weights (wing: 118 mm, 00h) versus moult gap size in 2c Dunlin, quadratic regression, single points (framed) not included in the calculation. Gap size measured in tenths of full-grown primaries.




2cweightmeansversusgaps

Fig. 10. 3c+ Dunlin: gap sizes in tenths of full primary versus moult score, regression line (n.s.) drawn. Diagonal "bands" of data connected with the primary most involved: "1", "2" etc. There are more birds with gaps in pps. 8 - 10 in the overall material, but most late moulters cannot be aged. Only positions shown, low points will indicate more than one value. For actual frequencies cf. Fig 10 in "Migrating Dunlin Calidris alpina in the Baltic area: the moult issue".




2cweightmeansversusgaps

Fig. 11. 2c Dunlin: gap sizes in tenths of full primary versus moult score, regression line (n.s.) drawn. Diagonal "bands" of data connected with the primary most involved: "1", "2" etc. There are more birds with gaps in pps. 8 - 10 in the overall material, but most late moulters cannot be aged. Only positions shown, low points will indicate more than one value. For actual frequencies cf. Fig 10 in "Migrating Dunlin Calidris alpina in the Baltic area: the moult issue".



Last changed 16.2.06