Table 5.
Toxicity of saxitoxin derivatives (fg STX eq. cell−1) from field experiments conducted during the spring of 2011.
| Saxitoxin derivatives fg STX eq cell−1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C1, C2 | Neo | dcSTX | STX | GTX1, 4 | GTX5 | dcGTX2, 3 | GTX2, 3 | Total | |
| 13-May | |||||||||
| 390μatm | 1093 (280) | 349 ( 372) | n.d. | 845 (215) | 107 (73) | 587 (155) | n.d. | 243 (71) | 3072 (999) |
| 750μatm | 809 (162) | 609 (446) | n.d. | 504 (100) | 372 ( 380) | 606 (431) | n.d. | 154 (5) | 2362 (639) |
| 1500μatm | 1542 (532) | 559 (106) | n.d. | 1014 (126) | 582 (119) | 731 (84) | n.d. | 329 (24) | 4757 (852) |
| 22-May | |||||||||
| 390μatm | 1944 (815) | 243 (70) | n.d. | 690 (372) | 203 (101) | 641 (123) | n.d. | 562 (36) | 4095 (1052) |
| 750μatm | 1456 (517) | 104 (15) | n.d. | 941 (533) | 90 (24) | 513 (209) | n.d. | 712 (259) | 3786 (1470) |
| 1500μatm | 1916 (544) | 87 (28) | n.d. | 749 (195) | 178 (126) | 328 (286) | n.d. | 459 (401) | 4110 (320) |
| 27-May | |||||||||
| 390μatm | 1319 (323) | 157 (64) | n.d. | 256 (114) | 606 (425) | 287 (123) | n.d. | 363 (24) | 2815 (880) |
| 750μatm | 1635 (574) | 30 (1) | n.d. | 227 (55) | 397 (285) | 305 (62) | n.d. | 433 (89) | 3016 (921) |
| 1500μatm | 1251 (315) | 23 (3) | n.d. | 262 (42) | 524 (355) | 325 (40) | n.d. | 448 (113) | 2827 (784) |
Values represent the mean (SD). Asterisks indicate significant differences (p<0.05) between treatments and the control (~390μatm). n.d. = not detected.