Table 1 Maximal observed decrease of pH in surrounding water after discharge of nematocysts
From: Formation and discharge of nematocysts is controlled by a proton gradient across the cyst membrane
Class, species/developmental state or organ | pH in seawater (15 μl) | pH after adding distilled water (40 μl) |
|---|---|---|
Anthozoa, Aiptasia sp./isolated acontia of polyp | 7.7 | 6.4 |
Scyphozoa, Aurelia aurita/ephyra (young medusa) | 7.8 | 6.3 |
Cubozoa, Tripedalia cystophora/polyp | 7.9 | 7.0 |
Cubozoa, Tripedalia cystophora/medusa | 7.9 | 6.8 |
Hydrozoa, Clytia johnstoni/medusa | 7.8 | 6.7 |
Hydrozoa, Thecocodium quadratum/medusa | 7.8 | 6.4 |
Hydrozoa, Cladonema sp./medusa | 7.8 | 6.2 |
Hydrozoa, Hydra vulgaris/polyp | 7.2* | 6.0* |