Table 1. Characteristics of the experimental nauplii and their repositioning jumps and swimming.
No. BC’s per jump | Total jump dist. | Initial turn characteristics | Power stroke delay, ms | Recovery stroke delay, ms | Beat phase duration | ||||||||
Species | BL, µm | average | Range | BL’s | occur., % | durat., ms | angle, deg. | Md→A2 | A2→A1 | Md→A2 | A2→A1 | ms | % of total BC |
T.l., jump | 97–382 | 2.8±1.9 | 1–9 | *range: 1–16 | 56 | 6.7±0.7 | **range: 11–58 | 1.1±0.4 | 3.0±0.5 | 0.3±0.5 | 0.7±0.4 | 9.1±1.1 | 80.5±4.0 |
T.l, swim | 149–357 | n.a. | n.a. | n.a. | n.a. | n.a. | n.a. | ca. 12 | ca.12 | ca.12 | ca.12 | 14.2±2.4 | 57.2±8.1 |
O.d., jump | 86–174 | 3.8±1.3 | 2–8 | 4.2±0.2 | 26 | 5.1±0.9 | 49.2±8.9 | 1.3±0.4 | 1.0±0.2 | 0.4±0.2 | 0.9±0.2 | 5.0±0.6 | 77.4±3.0 |
A.t., jump | 117–337 | 2.0±1.1 | 1–7 | 2.0±1.1 | 0 | n.a. | n.a. | 0.5±0.3 | 2.0±0.3 | 0.0±0.1 | 1.8±0.6 | 11.4±2.6 | 72.2±4.6 |
T.l.: Temora longicornis, O.d.: Oithona davisae, A.t.: Acartia tonsa, BL: body length, BC: beat cycle,, A1: antennules, A2: antennae, Md: mandibles, n.a.: not applicable. Values are given ± SD. *Log(TJD) = −0.98Log(BLmm) –0.17 (n = 53, r2 = 0.35, p<000.1),
Log(ANG) = −0.57Log(BLmm) +1.12 (n = 40, r2 = 0.56, p<0.0001), TJD: total jump distance, ANG: angle of initial turn.