DACTYLOGYRUS PARASITES (MONOGENEA) IN COMMON BREAM (ABRAMIS BRAMA) AND ROACH (RUTILUS RUTILUS) (CYPRINIDAE) AND THEIR RESPECTIVE HYBRIDS
| Autoři | |
|---|---|
| Rok publikování | 2013 |
| Druh | Další prezentace na konferencích |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | Hybridization is very common process in fish which help them to adapt for environmental changes and parasite pressure. This study was focused on the analyses of parasite infection (i.e. the intensity of infection of the dominant parasite group – Dactylogyrus species) in two cyprinid species living in sympatry, common bream (Abramis brama) and roach (Rutilus rutilus), and their respective hybrids collected from Hamry reservoir (Czech Republic). The fish were sampled in spring and autumn 2011. The difference in seasonal occurrence of Dactylogyrus species was analyzed. Total Dactylogyrus abundance was higher in parental species when compared to Dactylogyrus abundance in hybrid specimens. Roach was parasitized by 8 Dactylogyrus species and common bream was parasitized by 3 Dactylogysrus speices. Hybrids harbour all Dactylogyrus species of roach but only one Dactylogyrus species (D. auriculatus) parasitizing common bream. These results suggest the potential similarity in some immune mechanisms between roach and hybrids. In addition, our findings may suggest the role of co-adaptation genes likely explaining the absence of two common bream specific Dactylogyrus species in hybrids. |
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