Table 1.
Tetrodotoxin concentrations and masses among New Zealand populations of Pleurobranchaea maculata. Surveys were also undertaken at Narrow Neck Beach on 26/1/2011, 9/2/2011, 24/3/2011 and 13/4/2011 but No P. maculata were observed.
| Site | Depth (m) | Sampling Date | n | Tetrodotoxin (mg kg−1) | Pleurobranchaea maculata Mass (g) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ave | Min. | Max. | Std. Error | Ave | Min. | Max. | Std. Error | ||||
| Narrow Neck Beach | 3–6 | 14/06/2010 | 10 | 181.9 | 9.9 | 506.0 | 48.4 | 7.4 | 1.3 | 12.2 | 0.9 |
| 3–6 | 12/07/2010 | 10 | 85.7 | 15.2 | 150.2 | 15.3 | 14.3 | 5.6 | 20.8 | 1.5 | |
| 3–6 | 31/08/2010 | 9 | 52.6 | 10.3 | 120.5 | 12.1 | 20.7 | 14.0 | 42.7 | 2.9 | |
| 3–6 | 11/11/2010 | 9 | 21.7 | 1.7 | 83.1 | 8.9 | 20.7 | 12.9 | 33.4 | 2.4 | |
| 3–6 | 16/12/2010 | 10 | 17.5 | 1.1 | 48.4 | 5.4 | 15.5 | 7.8 | 25.7 | 1.7 | |
| Illiomama Rock | 6 | 14/06/2010 | 10 | 368.7 | 22.7 | 1414.0 | 146.6 | 6.3 | 3.6 | 9.7 | 0.6 |
| Bucklands Beach | 3–6 | 11/11/2010 | 10 | 28.8 | 1.5 | 39.4 | 12.5 | 30.8 | 20.4 | 39.5 | 2.1 |
| Tasman Bay | 20 | 05/11/2010 | 20 | 0.0 | 0.0 | 0.0 | - | 50.4 | 24.0 | 89.5 | 4.9 |
| Urquharts Bay | 3 | 28/08/2010 | 10 | 16.8 | 1.4 | 30.4 | 2.9 | 23.9 | 13.1 | 31.1 | 1.7 |
| Pilot Bay | 3–5 | 08/06/2011 | 8 | 89.6 | 29.7 | 205.6 | 19.7 | 11.6 | 8.7 | 16.3 | 1.1 |
| Kaikoura | 290 | 18/11/2011 | 1 | 0.0 | - | - | - | 17.5 | - | - | - |
| Cornwallis Beach | 3 | 02/09/2010 | 1 | 130.0 | - | - | - | 12.9 | - | - | - |
| Kau Bay | 14 | 01/08/2010 | 1 | 2.2 | - | - | - | 1.5 | - | - | - |
| Wilson Bay | 6 | 15/12/2010 | 1 | 0.1 | - | - | - | 7.2 | - | - | - |