Parasite ecology of Carassius gibelio (Bloch, 1782) in Jandari Lake (Georgia)

By

Murvanidze, Lali
Nikolaishvili, Ketevan
Lomidze, Tsitsino
Japoshvili, Bella
Arabuli, Lela
Asatiani, Ketevan

Type

Article

Date of Publication

2023-3-21

Original Publication

Caucasiana : journal on the biodiversity of the Caucasus and the adjacent regions

Volume

2

Pages

15--23

Subjects

Caucasus , Copepoda , eutrophic lake , Fish , Monogenea , Nematoda , Protozoa , Trematoda

Contributed by

Pensoft Publishers

Language

English

Published by

[Sofia, Bulgaria] Pensoft 2022-

Identifiers

DOI: https://doi.org/10.3897/caucasiana.2.e95777

 

Abstract

The aim of the investigation was to study the current structure of the parasitic fauna of the gibel carp (Carassius gibelio) population in the Georgian part of Jandari Lake. In total, 423 young gibel carp collected during 2014-2018 years from Jandari Lake have been subject to parasitological examination. The 20.3% (n=86) of examined fish were invaded by 11 species of parasites belonging to 5 taxonomic groups. The dominant taxonomic groups were discovered to be Protozoa and Monogenea. The eight species were registered for the first time in the gibel carp of freshwater reservoirs in Georgia. In general, young fish were more invaded by the monoxenic species of the direct life cycle. None of the revealed parasites were specific to gibel carp. The parasitic fauna of Jandari Lake is relatively poor, though it is comparatively rich and diverse in spring. Trichodina sp. from Protozoa, Ancyrocephalus sp., Dactylogyrus vastator, Gyrodactylus elegans from Monogenea, and Contracaecum sp. from Nematoda were revealed as the species most sensitive to annual changes. The main factor determining the parasite fauna of gibel carp in Lake Jandari is anthropogenic eutrophication, which changes the qualitative and quantitative composition of zooplankton, the main food source of juvenile fish and intermediate hosts of helminths. The difference in invasion indices between female and male gibel carp was insignificant. The synergetic relationship between some parasitic protozoans and monogeneans was marked.<br>