Table 1.

Flow speed at P. confoederata feeding filter

IndividualStageBody length, Lb, mmMean speed, U, cm·s−1 (n)Max speed, cm·s−1
1Aggregate272.3 ± 1.1 (3)4.1
2Solitary301.2 ± 0.9 (9)4.1
3Solitary341.5 ± 0.1 (15)2.4
4Solitary531.9 ± 1.0 (13)3.9
5Solitary562.0 ± 1.8 (11)6.7
6Solitary620.8 ± 0.2 (14)1.6
Mean ± SD (n)1.6 ± 0.6 (6)3.8 ± 1.7 (6)
  • Values expressed as mean ± SD. The mean speed weighted by the number of measurements for each organism was 1.5 ± 1.1 cm·s−1. n, no. of measurements.