The parasite community of the nase Chondrostoma nasus (L. 1758) from Austrian rivers

Abstract

Between April 2003 and November 2006 a total of 191 individuals of the predominantly herbivorous fish species nase Chondrostoma nasus (L. 1758) were examined for parasites from six river sites in Austria. The following parasite taxa were recovered--Ciliata: Trichodina sp., Chilodonella piscicola, Ichthyophthirius multifiliis; Myxozoa: Myxobolus muelleri (cysts) and Myxobolus sp. (cysts); Monogenea: Dactylogyrus vistulae, D. chondrostomi and Dactylogyrus spp., Gyrodactylus sp., Diplozoon paradoxum; Digenea: Diplostomum spathaceum (larv.) and Tylodelphis clavata (larv.); Cestoda: Caryophyllaeus laticeps; Acanthocephala: Pomphorhynchus laevis; Bivalvia: Unio sp. (Glochidia); Crustacea: Lamproglena pulchella; Hirudinea: Piscicola geometra. The only taxa occurring at all sample sites were Dactylogyrus spp., which was also the dominant taxon at most sites, and Myxobolus muelleri, both from the gills of the fish. This is the first record of the parasite community of the nase in Austria.

Parasite communities of the elongate tigerfish Hydrocynus forskahlii (Cuvier 1819) and redbelly tilapia Tilapia zillii (Gervais 1848) from Lake Turkana, Kenya: influence of host sex and size

“…The categories used to assess infection intensity were defined as follows: low-<10 parasite individuals per field of view (at 100-fold magnification); medium -11-100 parasites per field of view; and high->100 individuals per field of view (Jirsa et al 2011). The gill filaments were examined under a dissecting microscope.…”

Multidimensionality in parasite-induced phenotypic alterations: ultimateversusproximate aspects

“…For instance, P. laevis can use a very large range of fish species as intermediate hosts, including the bleak, Alburnus baliki (Aydogdu et al, 2011), the common barbel, Barbus barbus (Djikanovic et al, 2010;Dezfuli et al, 2011), the Turkish cyprinid Capoeta antalyensis (Aydogdu et al, 2011), the common nase, Chondrostoma nasus (Jirsa et al, 2011) . Relationship between the number of known parasite-induced phenotypic alterations (PIPAs) and the number of published studies for 11 host-parasite associations (adapted from Thomas et al, 2010a).…”

Parasitic loads in the genetically improved (F7) Nile tilapia Oreochromis niloticus (L.) cultured in fish farms in Busia and Siaya Counties, Kenya: indicators of increased resistance and efficiencies of synergistic technologies adoptions

“…The estimation of the intensity of protozoan parasites infecting the sh was done in three categories de ned by Jirsa et al (2011) as follows: low < 10 parasite individuals per eld of view, medium for 11-100 parasite individuals per eld of view, and high for more than 100 parasite individuals per eld of view at magni cation of ×100.The parameters, such as the Shannon-Wiener diversity index, Simpson index of dominance, and Margalef species richness, were calculated using an online biodiversity calculator (https://www.alyoung.com).…”