Naslov
Prevalence of pathogen Aphanomyces astaci in freshwater crayfish populations in Croatia

Autori
Maguire, Ivana ; Jelić, Mišel ; Klobučar, Goran ; Delaunay, Carine ; Grandjean, Frederic

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts - Regional European Crayfish Meeting CrayCro / Maguire, Ivana - Zagreb, 2013

Skup
Regional European Crayfish Meeting – CrayCro

Mjesto i datum
Rovinj, Hrvatska, 26.09.2013. - 28.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
native crayfish species; non-native crayfish species; crayfish plague

Sažetak
Crayfish plague has been recently well studied throughout Europe. In Croatia crayfish plague has been sporadically mentioned in literature as a possible cause of crayfish mass mortalities, but none of the papers offer confident scientific proofs. Therefore, the aim of this study was to give the first official overview on Aphanomyces astaci prevalence in different crayfish species inhabiting Croatian freshwater habitats. Crayfish were collected randomly during field work on different water bodies belonging to both the Black Sea and the Adriatic Sea drainages between 2003 and 2013. Samples included apparently healthy individuals as well as others with obvious signs of crayfish plague. Altogether 122 individuals were tested (1 white-clawed crayfish, 9 noble crayfish, 52 narrow-clawed crayfish, 4 stone crayfish, 6 red-clawed crayfish, 24 spiny cheek crayfish, 26 signal crayfish). Results of qPCR revealed the presence of A. astaci in 100% of white-clawed crayfish, 77% of noble crayfish, 23% of narrow-clawed crayfish, 40% of stone crayfish, 0% red-clawed crayfish, 58% of spiny cheek crayfish, 27% of signal crayfish. Level of infection, when positive, in non-native crayfish was generally low, and it reached A5 in just one individual for which the genotype was determined as B (PsI). In native species levels of infection, when positive, was higher. Genotyping from microsatellites (Grandjean et al., in prep.) proved presence of A (As) strain in noble crayfish and stone crayfish, and B (PsI) strain in narrowed-clawed crayfish. Further research is underway and new results are expected.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA