Figure 3
From: Benthic jellyfish act as suction pumps to facilitate release of interstitial porewater
Pumping pressure. Representative pressure data in (A) the absence and (B) the presence of Cassiopea sp. directly over the pressure sensor. Dips in pressure when an animal is present correspond to the initiation of the power stroke and average 43.4 Pa (± 13.6 s.d.). (C) The pressure under the bell of jellyfish is reduced when the bell is perforated with a 6 mm perforation. This difference is below the threshold for significance (One-sided Paired t-test, p = 0.07, n = 6, t = 1.81). The mean pressure fluctuation (± s.d.) produced during bell pulsation does not appear to correlate with the (D) diameter (n = 17, R2 = 0.04) or (E) surface area (n = 17, R2 = − 0.07) of the bell.
