Naslov
Pomphorhynchus laevis (Acanthocephala) from the Sava River Basin: new insights into strain formation, mtDNA-like sequences and dynamics of infection

Autori
Vardić Smrzlić, Irena ; Valić, Damir ; Kapetanović, Damir ; Filipović Marijić, Vlatka ; Gjurčević, Emil ; Teskeredžić, Emin

Izvornik
Parasitology international (1383-5769) 64 (2015), 5; 243-250

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
acanthocephalans ; Pomphorhynchus laevis ; Squalius cephalus ; Sutla/Sava Rivers ; genetic variability ; mitochondrial-like sequences

Sažetak
Here we report the genetic variability and presence of mtDNA-like sequences of P. laevis from the chub, Squalius cephalus, caught at the sampling sites along the Sava River and its tributary the Sutla River in Croatia. Sequences of the cytochrome c oxidase subunit 1 (COI) gene of the recovered P. laevis specimens were used for haplotype network construction and phylogenetic analysis. These analyses showed that some specimens contained mitochondrial- like sequences, and they uncovered the existence of a Sava River basin strain different from known strains of P. laevis. This is the first time that P. laevis has been shown to contain mtDNA-like sequences, suggesting the need to exercise caution during COI analyses of P. laevis using universal primers. Highly conserved sequences of two nuclear markers, the ITS region and 18S rRNA, were not helpful for understanding genetic variability or differentiating strains. Furthermore, analysis of the dynamics of P. laevis infections in S. cephalus from the Sava and Sutla Rivers showed decreased prevalence and abundance at sites with inferior water quality, positive association of parasite abundance with fish size, and no clear association of parasite abundance with fish condition index or sex.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biologija, Veterinarska medicina

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