Table 2. Comparative cestode infection in adult A. franciscana from single and syntopic populations.
Parasite infections from a population without co-ocurrence of congeners (pond 4, AF-single) and one in co-existence with A. salina (pond CX, AF-syntopic) from January to March 2009. The proportion of adult Artemia that were A. franciscana is shown in parentheses. Fisher Exact tests were used to compare infection rates between ponds in a given month. Significantly higher values are shown in bold.
| January 2009 | February 2009 | March 2009 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cestode species | AF-single N = 963, S = 125 g/l | AF-syntopic (75.9%) N = 132, S = 56 g/l | p value | AF-single N = 244, S = 130 g/l | AF-syntopic (32.9%) N = 28, S = 65 g/l | p value | AF-single N = 186, S = 150 g/l | AF-syntopic (33.8%) N = 104, S = 70 g/l | p value | |
| FL | P% | 0.3 | 3.0 * | 0.005 | 0.8 | 0.0 | 1.000 | 0.0 | 0.0 | – |
| MI | 1.00 ± 0.00 | 1.00 ± 0.00 | 1.000 | 1.00 ± 0.00 | 0.00 | – | 0.00 | 0.00 | – | |
| MA | 0.0031 ± 0.00 | 0.0303 ± 0.01** | 0.000 | 0.0082 ± 0.01 | 0.00 | 0.631 | 0.00 | 0.00 | 1.000 | |
| FF | P% | 0.7 | 2.3 | 0.011 | 2.5 | 0.0 | 1.000 | 0.0 | 1.0 | 0.359 |
| MI | 1.14 ± 0.14 | 1.00 ± 0.00 | 0.833 | 1.00 ± 0.00 | 0.00 | – | 0.00 | 1.00 | – | |
| MA | 0.0083 ± 0.00 | 0.0303 ± 0.01 | 0.081 | 0.0246 ± 0.01 | 0.00 | 0.402 | 0.00 | 0.0096 ± 0.01 | 0.181 | |
| WS | P% | 0.0 | 0.0 | – | 0.0 | 0.0 | – | 0.5 | 0.0 | 1.000 |
| MI | 0.00 | 0.00 | – | 0.00 | 0.00 | – | 1.00 | 0.00 | – | |
| MA | 0.00 | 0.00 | 1.000 | 0.00 | 0.00 | 1.000 | 0.0054 ± 0.01 | 0.00 | 0.455 | |
| FT | P% | 0.2 | 0.0 | 1.000 | 0.8 | 3.6 | 0.279 | 0.0 | 0.0 | – |
| MI | 1.00 ± 0.00 | 0.00 | – | 1.00 ± 0.00 | 1.00 | 1.000 | 0.00 | 0.00 | – | |
| MA | 0.0021 ± 0.00 | 0.00 | 0.600 | 0.0082 ± 0.01 | 0.0357 ± 0.04 | 0.187 | 0.00 | 0.00 | 1.000 | |
| EA | P% | 1.7 | 0.8 | 0.710 | 0.8 | 3.6 | 0.279 | 0.0 | 4.8 * | 0.006 |
| MI | 1.00 ± 0.00 | 1.00 | 1.000 | 1.00 ± 0.00 | 1.00 | 1.000 | 0.00 | 1.00 ± 0.00 | – | |
| MA | 0.0166 ± 0.00 | 0.0076 ± 0.01 | 0.431 | 0.0082 ± 0.01 | 0.0357 ± 0.04 | 0.187 | 0.00 | 0.0481 ± 0.02* | 0.003 | |
| GS | P% | 0.3 | 0.0 | 1.000 | 0.4 | 0.0 | 1.000 | 0.0 | 0.0 | – |
| MI | 1.00 | 0.00 | – | 1.00 ± 0.00 | 0.00 | – | 0.00 | 0.00 | – | |
| MA | 0.0041 ± 0.00 | 0.00 | 0.521 | 0.0031 ± 0.00 | 0.00 | 0.735 | 000 | 0.00 | 1.000 | |
| GSP | P% | 0.5 | 0.0 | 1.000 | 0.0 | 0.0 | – | 0.0 | 1.9 | 0.128 |
| MI | 1.00 ± 0.00 | 0.00 | – | 0.00 | 0.00 | – | 0.00 | 1.00 ± 0.00 | – | |
| MA | 0.0052 ± 0.00 | 0.00 | 0.407 | 0.00 | 0.00 | 1.000 | 0.00 | 0.0192 ± 0.01 | 0.058 | |
| Total infection | ||||||||||
| P% | 3.7 | 6.1 | 0.232 | 5.3 | 7.1 | 0.658 | 0.5 | 7.7 * | 0.001 | |
| MI | 1.03 ± 0.03 | 1.00 ± 0.00 | 0.917 | 1.00 ± 0.00 | 1.00 ± 0.00 | 1.000 | 1.00 | 1.00 ± 0.00 | 1.000 | |
| MA | 0.0384 ± 0.01 | 0.0606 ± 0.02 | 0.204 | 0.0533 ± 0.01 | 0.0714 ± 0.05 | 0.691 | 0.0054 ± 0.01 | 0.0865 ± 0.03* | 0.001 | |
| Species Richness | 0.04 ± 0.01 | 0.06 ± 0.02 | 0.203 | 0.05 ± 0.01 | 0.07 ± 0.05 | 0.691 | 0.01 ± 0.01 | 0.08 ± 0.03 * | 0.001 | |
| SR infected | 1.00 ± 0.00 | 1.00 ± 0.00 | 1.000 | 1.00 ± 0.00 | 1.00 ± 0.00 | 1.000 | 1.00 | 1.00 ± 0.00 | 1.000 | |
Notes.
- N
- total number of specimens examined
- S
- salinity
Other abbreviations are explained in Table 1.
*
p < 0.05.
**
p < 0.001.
–
Test not possible owing to lack of data.