Table 1 Size frequency (%) of the prey consumed by trout
From: Adaptive flexibility in the feeding behaviour of brown trout: optimal prey size
Size class (mm) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
0 to 2 | 2 to 4 | 4 to 6 | 6 to 8 | 8 to 10 | 10 to 12 | 12 to 14 | 14 to 16 | 16 to 18 | 18 to 20 | >20 | |
Anllóns | |||||||||||
0+ (n = 2) | 0 | 10.8 | 27.0 | 2.7 | 13.5 | 45.9 | 0 | 0 | 0 | 0 | 0 |
1+ (n = 18) | 1.3 | 18.4 | 23.7 | 3.0 | 27.3 | 24.7 | 0 | 0.3 | 0 | 0.7 | 0.7 |
2+ (n = 9) | 0.4 | 18.9 | 56.9 | 1.3 | 4.7 | 17.0 | 0 | 0.2 | 0 | 0 | 0.6 |
3+ (n = 6) | 0 | 15.1 | 52.8 | 15.1 | 1.9 | 11.3 | 1.9 | 1.9 | 0 | 0 | 0 |
Pooled data | 0.7 | 18.2 | 43.7 | 2.8 | 12.8 | 20.6 | 0.1 | 0.3 | 0 | 0.2 | 0.6 |
Furelos | |||||||||||
0+ (n = 37) | 2.1 | 3.2 | 33.5 | 0 | 1.9 | 51.0 | 0 | 6.5 | 0 | 0 | 1.8 |
1+ (n = 19) | 1.4 | 4.8 | 81.0 | 0.1 | 0.2 | 6.0 | 0 | 3.9 | 0 | 0 | 2.6 |
2+ (n = 5) | 0.5 | 2.8 | 54.1 | 0 | 8.7 | 4.1 | 0 | 8.7 | 0 | 0 | 21.1 |
3+ (n = 3) | 3.2 | 18.5 | 15.3 | 0.8 | 0 | 33.1 | 0 | 0 | 0 | 0 | 29.0 |
Pooled data | 1.6 | 4.8 | 60.7 | 0.1 | 1.5 | 20.9 | 0 | 4.9 | 0 | 0 | 5.4 |
Lengüelle | |||||||||||
0+ (n = 6) | 0 | 2.4 | 62.9 | 0 | 13.7 | 19.4 | 0 | 0.8 | 0 | 0 | 0.8 |
1+ (n = 13) | 0 | 18.3 | 37.7 | 0.4 | 16.5 | 20.4 | 0 | 0 | 0 | 0 | 6.7 |
2+ (n = 16) | 0.8 | 7.9 | 53.1 | 0.8 | 4.3 | 24.1 | 0 | 0.2 | 0 | 0 | 8.7 |
3+ (n = 4) | 5.8 | 1.9 | 32.7 | 0 | 9.6 | 38.5 | 0 | 0 | 0 | 0 | 11.5 |
Pooled data | 0.7 | 10.0 | 48.7 | 0.5 | 9.4 | 23.2 | 0 | 0.2 | 0 | 0 | 7.2 |
Tambre | |||||||||||
1+ (n = 24) | 1.6 | 12.6 | 59.6 | 0.7 | 6.7 | 17.0 | 0 | 0.9 | 0 | 0 | 0.8 |
2+ (n = 6) | 0.3 | 5.2 | 56.0 | 0.9 | 4.0 | 28.4 | 0 | 2.4 | 0 | 0 | 2.8 |
Pooled data | 1.4 | 11.2 | 58.9 | 0.8 | 6.2 | 19.2 | 0 | 1.2 | 0 | 0 | 1.2 |
Rois | |||||||||||
1+ (n = 31) | 2.7 | 7.7 | 33.8 | 3.2 | 14.3 | 33.9 | 0 | 2.7 | 0 | 0.2 | 1.4 |
2+ (n = 2) | 2.0 | 6.0 | 28.0 | 6.0 | 4.0 | 46.0 | 0 | 2.0 | 0 | 0 | 6.0 |
Pooled data | 2.7 | 7.6 | 33.6 | 3.4 | 13.8 | 34.5 | 0 | 2.7 | 0 | 0.2 | 1.6 |
Santa Lucía | |||||||||||
1+ (n = 24) | 2.2 | 29.4 | 34.7 | 7.0 | 5.0 | 7.9 | 0 | 8.0 | 0.3 | 2.3 | 3.4 |
2+ (n = 5) | 3.2 | 20.6 | 40.2 | 10.6 | 4.2 | 15.3 | 0 | 4.8 | 0 | 0.5 | 0.5 |
Pooled data | 2.4 | 27.7 | 35.8 | 7.7 | 4.8 | 9.3 | 0 | 7.4 | 0.2 | 1.9 | 2.9 |
Sar | |||||||||||
1+ (n = 25) | 0.6 | 33.8 | 4.0 | 0.9 | 1.1 | 57.8 | 0 | 0.2 | 0 | 0.1 | 1.6 |
2+ (n = 4) | 1.0 | 17.7 | 3.0 | 0.5 | 3.4 | 70.4 | 0 | 1.5 | 0 | 0 | 2.5 |
Pooled data | 0.6 | 32.2 | 3.9 | 0.9 | 1.3 | 59.0 | 0 | 0.3 | 0 | 0.05 | 1.7 |
Traba | |||||||||||
1+ (n = 15) | 0.3 | 4.8 | 45.5 | 0.4 | 14.8 | 33.8 | 0 | 0.2 | 0 | 0 | 0.1 |
2+ (n = 14) | 0.5 | 7.6 | 51.5 | 1.0 | 10.7 | 28.1 | 0 | 0.2 | 0 | 0 | 0.2 |
Pooled data | 0.4 | 5.7 | 47.6 | 0.6 | 13.4 | 31.8 | 0 | 0.2 | 0 | 0 | 0.2 |
Total (n = 288) | 3.44 | 5.00 | 44.44 | 3.42 | 8.27 | 31.97 | 0.01 | 1.30 | 0.03 | 0.17 | 1.97 |