Table 2. Gambierdiscus strain numbers, growth rate, coefficient of variation among strains, and intraspecific differences for each species and salinity (10–60).
| Species | Salinity | Number of strains | Growth rate (mean ± SD day-1) | Coefficient of variation (%) | p value |
|---|---|---|---|---|---|
| G. belizeanus | 10 | 4 | no growth | ||
| G. belizeanus | 15 | 4 | no growth | ||
| G. belizeanus | 20 | 4 | 0.12 ± 0.03 | 24.2 | 0.106 |
| G. belizeanus | 25 | 4 | 0.22 ± 0.04 | 16.3 | 0.158 |
| G. belizeanus | 30 | 4 | 0.27 ± 0.01 | 3.8 | 0.686 |
| G. belizeanus | 35 | 4 | 0.28 ± 0.02 | 7.1 | 0.106 |
| G. belizeanus | 40 | 4 | 0.27 ± 0.04 | 14.5 | 0.012 |
| G. belizeanus | 45 | 4 | 0.20 ± 0.04 | 21.8 | 0.380 |
| G. belizeanus | 50 | 4 | 0.03 ± 0.02 | 72.7 | 0.194 |
| G. belizeanus | 55 | 4 | 0.01 ± 0.02 | 200.0 | 0.013 |
| G. belizeanus | 60 | 4 | no growth | ||
| G. caribaeus | 10 | 3 | no growth | ||
| G. caribaeus | 15 | 3 | 0.06 ± 0.04 | 64.0 | 0.144 |
| G. caribaeus | 20 | 3 | 0.17 ± 0.03 | 17.9 | 0.193 |
| G. caribaeus | 25 | 3 | 0.30 ± 0.08 | 26.7 | 0.001 |
| G. caribaeus | 30 | 3 | 0.29 ± 0.06 | 19.1 | 0.010 |
| G. caribaeus | 35 | 3 | 0.30 ± 0.07 | 22.1 | 0.001 |
| G. caribaeus | 40 | 3 | 0.27 ± 0.04 | 14.0 | 0.085 |
| G. caribaeus | 45 | 3 | 0.21 ± 0.03 | 12.9 | 0.368 |
| G. caribaeus | 50 | 3 | 0.09 ± 0.02 | 24.2 | 0.285 |
| G. caribaeus | 55 | 3 | 0.01 ± 0.01 | 173.2 | 0.368 |
| G. caribaeus | 60 | 3 | no growth | ||
| G. carolinianus | 10 | 3 | no growth | ||
| G. carolinianus | 15 | 3 | no growth | ||
| G. carolinianus | 20 | 3 | no growth | ||
| G. carolinianus | 25 | 3 | 0.06 ± 0.02 | 29.1 | 0.725 |
| G. carolinianus | 30 | 3 | 0.21 ± 0.05 | 22.7 | 0.022 |
| G. carolinianus | 35 | 3 | 0.32 ± 0.14 | 44.3 | 0.005 |
| G. carolinianus | 40 | 3 | 0.35 ± 0.12 | 33.6 | 0.008 |
| G. carolinianus | 45 | 3 | 0.20 ± 0.04 | 19.9 | 0.049 |
| G. carolinianus | 50 | 3 | 0.04 ± 0.04 | 88.9 | 0.126 |
| G. carolinianus | 55 | 3 | 0.01 ± 0.01 | 173.2 | 0.368 |
| G. carolinianus | 60 | 3 | no growth | ||
| G. pacificus | 10 | 2 | no growth | ||
| G. pacificus | 15 | 2 | no growth | ||
| G. pacificus | 20 | 2 | 0.03 ± 0.02 | 65.6 | 0.079 |
| G. pacificus | 25 | 2 | 0.24 ± 0.03 | 13.8 | 0.078 |
| G. pacificus | 30 | 2 | 0.29 ± 0.04 | 14.1 | 0.007 |
| G. pacificus | 35 | 2 | 0.32 ± 0.02 | 6.9 | 0.320 |
| G. pacificus | 40 | 2 | 0.37 ± 0.06 | 16.9 | 0.106 |
| G. pacificus | 45 | 2 | 0.29 ± 0.00 | 1.2 | 0.864 |
| G. pacificus | 50 | 2 | 0.07 ± 0.01 | 14.2 | 0.680 |
| G. pacificus | 55 | 2 | no growth | ||
| G. pacificus | 60 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 10 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 15 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 20 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 25 | 2 | 0.03 ± 0.02 | 57.8 | 0.621 |
| Gambierdiscus sp. type 4 | 30 | 2 | 0.12 ± 0.00 | 1.5 | 0.949 |
| Gambierdiscus sp. type 4 | 35 | 2 | 0.31 ± 0.00 | 0.9 | 0.910 |
| Gambierdiscus sp. type 4 | 40 | 2 | 0.29 ± 0.02 | 7.3 | 0.345 |
| Gambierdiscus sp. type 4 | 45 | 2 | 0.20 ± 0.05 | 26.9 | 0.047 |
| Gambierdiscus sp. type 4 | 50 | 2 | 0.05 ± 0.06 | 141.4 | 0.121 |
| Gambierdiscus sp. type 4 | 55 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 60 | 2 | no growth |
Salinities at which intraspecific variation was significant are listed in bold (α < 0.05).