Philometra rischta Skrjabin, 1923

Kirjusina, Muza, Paidere, Jana, Rubenina, Ilze, Kecko, Sanita, Bricis, Reinis, Mežaraupe, Ligita & Gavarane, Inese, 2023, Common Freshwater Fish Nematodes In Latvia, Acta Biologica Universitatis Daugavpiliensis 23 (2), pp. 189-206 : 196-197

Philometra rischta Skrjabin, 1923

In Slokas Lake 20.0% of roach was infected. Site of infection – tissues on the inner surface of gill covers, under the skin of head ( Kirjusina & Vismanis 2001). The location pertains to gravid, subgravid and young unfertilized females. The life cycle of a nematode is one year. The first intermediate hosts are copepods of the genera Cyclops , Macrocyclops , Megacyclops , Mesocyclops and Eucyclops . The definitive hosts are various species of cyprinids (Kazakov 1989, Molnar 1966). In Latvian freshwaters Mesocyclops leuckarti is recorded from lakes (Vaidavas (Eutrophication of small lakes in Latvia), Sitas, Riču, Sventes, Drīdzis, Geraņimovas Ilzas ( Vezhnovets & Škute 2012, Brakovska et al. 2020), Jazinkas, Lejas, Nirzas, Rāznas, Ārdavs, Alauksts,

Common freshwater fish nematodes in Latvia

Bešons, Dagdas, Dubuļu, Ežezers, Galšūns, Lielais Gusena, Laucesas, Stirnu, Usmas, Varnaviču ( Paidere et al. 2012, Unpublished zooplankton data of Latvian priority salmonoid water lakes 2009, 2010), Ilzu (Garais) (Conceptual model of surface – groundwater interaction 2022), Saukas ( Paidere et al. 2023), Vēveru (Tretjakova at al. 2023), ponds, Nagļu fish ponds ( Paidere & Brakovska 2019). Overall, it can be recorded from a variety of water bodies. In Latvian water bodies, Cyclops strenuus is common and widely distributed ( Deimantoviča et al. 2011, Dimante-Deimantoviča 2012). Distribution of Megacyclops and Macrocyclops is described in sections about C. lacustris and P. ovata , respectively.