Some Aspects of Branchial Parasitism in Rutilus Rutilus (linnaeus, 1758) from Moara Domnească Lake

An environment intensively studied from many perspectives, through the efforts of an interdisciplinary team of biologists, ecologists, geneticists, chemists, pedologists, etc. is Moara Domnească agroecosystem. Located in the North-East of Bucharest, the Moara Domnească Lake is used for irrigation of the neighbouring agricultural areas and also for pisciculture (Stavrescu-Bedivan et al., 2011). It is a lake with high trophic resources, considering the nutrient concentration in water (Bălan et al., 2010). According to biodiversity research undertaken in the area of interest by a biologists team (Iorgu et al., 2009) from “Grigore Antipa” National Museum of Natural History (Bucharest), there is some information about the fish community structure in the Moara Domnească Lake. Thus, it is currently known that this lake contains dominant fish species like: rudd (Scardinius erythrophthalmus), roach (Rutilus rutilus), goldfish (Carassius auratus gibelio), chub (Leuciscus cephalus), pumpkinseed (Lepomis gibbosus), topmouth gudgeon (Pseudorasbora parva), etc. Also, the presence of some Asian species introduced in the Romanian fauna cannot be neglected: silver carp (Hypophthalmichthys molitrix), bighead carp (Aristichthys nobilis) or grass carp (Ctenopharyngodon idella). The aim of this work was to analyse the factors that could influence the spatial distribution of the monogenean Paradiplozoon sp. adult specimens found on the gills of Rutilus rutilus freshwater cyprinid host and the relationship established between the roach biometry and the parasite infection in Moara Domnească Lake.