Fig. 1.
Map of the Algerian sample collection sites. Main fishing ports along the Algerian coast (modified map).
Fig. 2.
Biodiversity of Digeneas parasites of two species of mullet of the genus Mullus from the Algerian coast.
Table 1.
The prevalence and abundance of parasitic infection in two species of red mullet from the Algerian coast.
| Digenean species | Derogenes latus | Lecithocladium excisum | Opecoeloides furcatus | Poracanthium furcatum | Proctotrema bacilliovatum | Proctoeces maculatus |
|---|---|---|---|---|---|---|
| Number of positive samples | 14 | 27 | 155 | 37 | 9 | 8 |
| Prevalence parasites | 2.22% | 4.29% | 24.60% | 5.87% | 1.43% | 1.27% |
| Number of parasites | 19 | 89 | 1189 | 84 | 147 | 15 |
| Abundance parasites | 0.03 | 0.14 | 1.89 | 0.13 | 0.23 | 0.04 |
Table 2.
Prevalence (P %) and abundance (A) of parasites found in Mullus barbatus and Mullus surmuletus in from the Algerian coast.
| Digenean species | Derogenes latus | Lecithocladium excisum | Opecoeloides furcatus | Poracanthium furcatum | Proctotrema bacilliovatum | Proctoeces maculatus | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hosts | Number of hosts | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A |
| Mullus barbatus | 507 | 1.97 | 0.03 | 3.35 | 0.05 | 21.30 | 1.61 | 3.75 | 0.06 | 0.39 | 0.00 | 0.00 | 0.01 |
| Mullus surmuletus | 123 | 3.25 | 0.05 | 8.13 | 0.50 | 38.21 | 3.04 | 14.63 | 0.46 | 5.69 | 0.20 | 6.50 | 1.16 |
Table 3.
The prevalence and abundance of parasitic infection in two species of red mullet from the Algerian coast in relation to the size and weight of the fish.
| Digenean species | Derogenes latus | Lecithocladium excisum | Opecoeloides furcatus | Poracanthium furcatum | Proctotrema bacilliovatum | Proctoeces maculatus | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hosts | Mean values | Number of hosts | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A |
| Length (cm) | ≤ 16.5 | 396 | 1.52 | 0.02 | 4.04 | 0.09 | 19.44 | 1.33 | 5.30 | 0.09 | 0.25 | 0.01 | 1.01 | 0.03 |
| > 16.5 | 234 | 3.42 | 0.05 | 4.70 | 0.24 | 33.33 | 2.83 | 6.84 | 0.21 | 3.42 | 0.62 | 1.71 | 0.06 | |
| Weight (g) | ≤ 100 | 600 | 1.67 | 0.02 | 4.00 | 0.09 | 24.33 | 1.69 | 5.83 | 0.13 | 1.00 | 0.16 | 1.17 | 0.04 |
| >100 | 30 | 13.33 | 0.20 | 10.00 | 1.27 | 30.00 | 5.83 | 6.67 | 0.20 | 10.00 | 1.70 | 3.33 | 0.03 | |
Table 4.
Prevalence (P %) and abundance (A) of parasites found in Mullus barbatus and Mullus surmuletus in the three study areas.
| Digenean species | Derogenes latus | Lecithocladium excisum | Opecoeloides furcatus | Poracanthium furcatum | Proctotrema bacilliovatum | Proctoeces maculatus | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hosts | Number of hosts | Areas | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A |
| Mullus barbatus | 507 | Centre | 6.82 | 0.02 | 12.88 | 0.06 | 78.79 | 1.59 | 13.64 | 0.06 | 1.52 | 0.00 | 0.00 | 0.01 |
| East | 0.00 | 0.00 | 0.00 | 0.00 | 80.00 | 3.45 | 20.00 | 0.09 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| West | 100 | 0.13 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| Mullus surmuletus | 123 | Centre | 1.96 | 0.01 | 15.69 | 0.52 | 84.31 | 3.34 | 27.45 | 0.38 | 7.84 | 0.23 | 15.69 | 0.92 |
| East | 20.00 | 0.09 | 40.00 | 0.55 | 60.00 | 1.09 | 60.00 | 1.00 | 40.00 | 0.00 | 0.00 | 1.36 | ||
| West | 100 | 1.00 | 0.00 | 0.00 | 50.00 | 0.25 | 50.00 | 1.00 | 50.00 | 0.00 | 0.00 | 7.25 | ||
Table 5.
The seasonal variation in the prevalence (P %) and abundance (A) of Digeneas parasites found in Mullus barbatus and Mullus surmuletus.
| Digenean species | Derogenes latus | Lecithocladium excisum | Opecoeloides furcatus | Poracanthium furcatum | Proctotrema bacilliovatum | Proctoeces maculatus | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hosts | Number of hosts | Seasons | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A | P (%) | A |
| Mullus barbatus | 507 | Autumn | 5.66 | 0.02 | 24.53 | 0.11 | 71.70 | 0.98 | 15.09 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 |
| Winter | 12.50 | 0.06 | 12.50 | 0.08 | 79.17 | 1.16 | 4.17 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| Spring | 3.03 | 0.01 | 3.03 | 0.01 | 78.79 | 1.57 | 18.18 | 0.06 | 3.03 | 0.00 | 0.00 | 0.02 | ||
| Summer | 10.71 | 0.06 | 0.00 | 0.00 | 89.29 | 3.83 | 14.29 | 0.06 | 3.57 | 0.00 | 0.00 | 0.01 | ||
| Mullus surmuletus | 123 | Autumn | 21.43 | 0.13 | 21.43 | 0.42 | 57.14 | 0.76 | 35.71 | 0.34 | 21.43 | 0.13 | 14.29 | 1.16 |
| Winter | 16.67 | 0.07 | 50.00 | 2.73 | 83.33 | 2.53 | 16.67 | 0.53 | 0.00 | 0.07 | 16.67 | 0.00 | ||
| Spring | 0.00 | 0.00 | 5.56 | 0.05 | 83.33 | 3.49 | 5.56 | 0.26 | 16.67 | 0.03 | 5.56 | 2.51 | ||
| Summer | 0.00 | 0.00 | 15.00 | 0.10 | 95.00 | 5.52 | 55.00 | 0.81 | 5.00 | 0.58 | 20.00 | 0.03 | ||
Fig. 3.
Correspondence Factorial Analysis (AFC) of parasitic Digenea according to the seasons of two red mullet species.