Table 2.
Parameters of Astyanax aeneus and monogenean communities sampled in 2012 from 11 localities along the Río Lacantún, Chiapas, México. Fifteen hosts were examined from each locality/date, except from José in February, when only 8 hosts were examined.
| TZENDALES |
MANZANARES |
MIRANDA |
DANTA |
LAGARTOS |
EMBARCA |
JOSÉ |
CHAJUL |
SAN PABLO |
PUERTO RICO |
IXCAN |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb | Aug | Feb | Aug | Feb | Aug | Feb | Aug | Feb | Aug | Feb | Feb | Aug | Feb | Aug | Feb | Aug | Feb | Aug | Feb | Aug | |
| Mean standard length of hosts ± Sd | 43.8 ±6.0 |
52.1 ±12.1 |
43.3 ±18.9 |
48.7 ±17.6 |
37.7 ±8.5 |
46.1 ±24 |
49.5 ±8.2 |
74.1 ±17.9 |
33.0 ±3.0 |
54.5 ±7.4 |
34.8 ±4.0 |
40.8 ±9.7 |
47.6 ±3.2 |
31.5 ±2.2 |
43.7 ±8.3 |
43.4 ±8.4 |
44.6 ±9.0 |
35.7 ±6.3 |
47.5 ±4.5 |
34.8 ±4.0 |
45.3 ±6.9 |
| Total no. of Monogenean species found (SO) | 4 | 6 | 5 | 4 | 3 | 3 | 3 | 5 | 3 | 5 | 5 | 3 | 3 | 7 | 2 | 3 | 4 | 5 | 6 | 6 | 7 |
| No. of monogenean species estimated (Jackknife SJ) | 6.8 | 7.8 | 5.9 | 5.8 | 6.6 | 3 | 3 | 6.8 | 3 | 6.8 | 7.8 | 4 | 3.8 | 11.6 | 2 | 6.6 | 4.9 | 5.9 | 7.8 | 6.2 | 7.9 |
| Proportion of species of monogeneans recovered (SO/SJ) | 0.58 | 0.76 | 0.84 | 0.68 | 0.45 | 1 | 1 | 0.73 | 1 | 0.73 | 0.64 | 0.75 | 0.78 | 0.6 | 1 | 0.45 | 1 | 0.84 | 0.76 | 1 | 0.88 |
| Total no. of individual monogeneans | 7 | 89 | 62 | 68 | 11 | 62 | 36 | 80 | 13 | 29 | 20 | 16 | 8 | 40 | 17 | 15 | 30 | 35 | 55 | 54 | 46 |
| Berger-Parker Index | 0.42 | 0.46 | 0.53 | 0.64 | 0.81 | 0.41 | 0.72 | 0.55 | 0.61 | 0.41 | 0.55 | 0.56 | 0.5 | 0.65 | 0.64 | 0.86 | 0.7 | 0.68 | 0.53 | 0.74 | 0.34 |
| Dominant species | P. het | C. cos | C. cos | C. cos | C. cos | C. cos | C. cos | C. cos | C. cos | A.ana | C. cos | C. cos | C. cos | C. cos | P. het | C. cos | C. cos | C. cos | C. cos | C. cos | C. cos |
| Mean no. of species per host | 0.47 | 2.2 | 1.4 | 1.4 | 0.53 | 1.33 | 0.93 | 1.47 | 0.6 | 1.1 | 1.07 | 0.53 | 0.6 | 1.4 | 0.6 | 0.53 | 1.1 | 1.07 | 1.73 | 1.33 | 1.3 |
| Maximum no. of species in a host | 3 | 5 | 5 | 3 | 2 | 3 | 2 | 4 | 2 | 3 | 2 | 1 | 3 | 3 | 2 | 2 | 3 | 2 | 4 | 4 | 3 |
|
| |||||||||||||||||||||
| % of host with 0 species | 66.6 | 0 | 20 | 0 | 60 | 26.6 | 20 | 20 | 46.6 | 20 | 13.3 | 46.6 | 62.5 | 13.3 | 46.6 | 53.3 | 20 | 13.3 | 0.06 | 20 | 20 |
| Mean no. of individual monogeneans per host | 0.47 | 5.9 | 4.13 | 4.53 | 0.73 | 4.13 | 2.4 | 5.33 | 0.87 | 1.9 | 1.33 | 1.07 | 1 | 2.6 | 1.1 | 1 | 2 | 2.33 | 3.7 | 3.6 | 3.1 |
| Maximum number of monogeneans in a host | 3 | 40 | 13 | 17 | 3 | 16 | 6 | 26 | 4 | 4 | 3 | 4 | 6 | 10 | 4 | 4 | 7 | 8 | 10 | 16 | 12 |
| Mean Bray Curtis similarity index ± Sd between infracommunities | 0.46 | 0.35 | 0.22 | 0.31 | 0.43 | 0.24 | 0.28 | 0.31 | 0.27 | 0.17 | 0.29 | 0.29 | 0.38 | 0.29 | 0.29 | 0.34 | 0.25 | 0.18 | 0.26 | 0.23 | 0.14 |