Search

For the period 2019-2021, an ecoparasitological study of six fish species - grass carp (Ctenopharyngodon idella Valenciennes, 1844); silver carp (Hypophthalmichthys molitrix Valenciennes, 1844); pumpkinseed (Lepomis gibbosus Linnaeus, 1758); Prussian carp (Carassius gibelio Bloch, 1782); gudgeon (Gobio gobio Linnaeus, 1758); European bitterling (Rhodeus amarus Bloch, 1782) was conducted. The fish were caught from 3 biotopes (Koshava, Kudelin, Novo selo) from the upper section of the Danube River in Bulgaria. A total of two parasite species (Pomphorhynchus laevis Zoega in Müller, 1776) Porta, 1908 and Contracaecum sp. (larvae) were found in two of the investigated fish species. Four fish species were not infected. The ecological indices (mean intensity; mean abundance; prevalence) of parasites were calculated. Kudelin and Koshava biotopes are new habitats for the found helminth species of the infected fish species. [ABSTRACT FROM AUTHOR]

This study is the first to reveal the helminth fauna and helminth community's structure of Prussian carp (Carassius gibelio) from Maritsa River, Bulgaria. In 2022, ten Prussian carp specimens were collected from the Maritsa River and examined for parasites. 90% of the studied hosts harbour parasites. Two species of helminths were fixed: one from class Acanthocephala (Acanthocephalus anguillae Muller, 1780) and one from class Nematoda (Pseudocapillaria tomentosa Dujardin, 1843). The established nematode species is distinguished with high prevalence. Carassius gibelio is reported for the first time as a host for Pseudocapillaria tomentosa in Bulgaria. The river ecosystem of Maritsa is a new locality record for Pseudocapillaria tomentosa in Bulgaria. [ABSTRACT FROM AUTHOR]

In 2021, ecologoparasitological research was done based on the helminths and helminth communities of Prussian carp (Carassius gibelio (Bloch, 1782)) from the freshwater ecosystem of the Tundzha River, Aegean Water Basin. As a result of the examined twenty-one specimens of Prussian carp, three taxa of helminths were found: Nicolla skrjabini (Iwanitzky, 1928) Dollfus, 1960; Pomphorhynchus laevis (Müller, 1776) Porta, 1908; Contracaecum sp. The dominant structure of the helminth communities was determined. N. skrjabini is a core species for helminth communities of C. gibelio (P% = 23.81). New data on the helminth communities of the Prussian carp from the studied area of the freshwater ecosystem are presented. The basic ecological indices of the helminth populations and communities were determined. The bioindication role of the established helminth species as well as an assessment of the ecological status of the studied biocenoses was presented. [ABSTRACT FROM AUTHOR]

During the ecological study of 19 specimens of Prussian carp (Carassius gibelio, Bloch, 1782) from Tundja River, by applying standard techniques for parasites, an infestation was found with the acanthocephalan species Acanthocephalus anguillae (Müller, 1780). Helminth parasites were recorded in 5 Prussian carp specimens (26.32%). The established helminth species is autogenic species, matured in fish. In the component community of Carassius gibelio from Tundja River A. anguillae is core species. This study is the first that presents the Prussian carp's endohelminth species biodiversity from Tundja River, Bulgaria. The established in this study parasite species is discussed and compared with previous researches of parasite communities of C. gibelio from Bulgaria. This is the first report of Acanthocephalus anguillae for the helminth communities of Prussian carp for river related to Aegian Basin in Bulgaria. [ABSTRACT FROM AUTHOR]