Cucullanus truttae Fabricius, 1794

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 (Sao Paulo, Brazil) 23 (2), pp. 189-206 : 194

Cucullanus truttae Fabricius, 1794

For the first time in Latvia, this freshwater and brackish water parasite has been reported by S. S. Shulman (1949) as syn. Dacnitis stelmioides Vessichelli, 1910 and D. truttae (Fabricius 1794) . Lampreys ( Lampetra fluviatilis ), salmon and River trout ( Salmo trutta fario ) from ravers (mouth of the Daugava River, Līčupe River and rivers entering the Gulf of Riga) were infected. Prevalence of invasion was higher in salmon (26,6%) and other species – 6.6% ( Kirjusina & Vismanis 2004). In the life cycle of this parasite, lampreys act as both an intermediate (lamprey larvae) host and a definitive host (lampreys after metamorphosis). In lamprey larvae, second-stage nematode larvae develop and reach sexual maturity in adult lampreys. Thus, lampreys can act as intermediate and definitive hosts. Infection of other definitive hosts occurs both when feeding on lamprey larvae and adult lampreys. Salmon and other predatory fish act as definitive hosts ( Moravec 1979a, Moravec 1980a, Moravec 1980b, Moravec 1994).

Order SPIRURIDA Chitwood, 1933 Superfamily APROCTOIDEA Yorke et