title: Massive mortality of Prussian carp Carassius gibelio in the upper Elbe basin associated with herpesviral hematopoietic necrosis (CyHV-2).
abstract: From 22 May to 10 June 2011 massive mortality of Prussian carp Carassius gibelio was observed in alluvial Lake Řehacˇka close to the Elbe River in the Czech Republic. More than 1400 kg of dead fish were collected and no other fish species were affected. Further molecular and cytogenetic investigation of fish (n = 232) revealed that the Rˇehacˇka population of Prussian carp consisted exclusively of gynogenetic triploid females. The causative agent was identified by means of molecular and electron microscopy as a herpesviral hematopoietic necrosis virus (Cyprinid herpesvirus 2, CyHV-2). This is the first report of CyHV-2 from the Czech Republic and the second finding worldwide of CyHV-2 causing mass mortality of C. gibelio. Some other localities in the upper Elbe River basin where C. gibelio was affected are also noted. We assume that the massive wave of deaths of all female gynogenetic Prussian carp can be attributed to limited genetic variation and the favourable conditions for development of viral disease.
authors.affiliation: Department of Zoology and Fisheries, Food and Natural Resources, Czech University of Life Sciences Prague, Czech Republic.
authors.forename: Tomá
authors.initials: T
authors.lastname: Daněk
authors.forename: Luká
authors.initials: L
authors.lastname: Kalous
authors.forename: Tomá
authors.initials: T
authors.lastname: Vesel
authors.forename: Eva
authors.initials: E
authors.lastname: Krásová
authors.forename: Stanislava
authors.initials: S
authors.lastname: Reschová
authors.forename: Katerˇina
authors.initials: K
authors.lastname: Rylková
authors.forename: Pavel
authors.initials: P
authors.lastname: Kulich
authors.forename: Miloslav Petrt
authors.initials: MP
authors.lastname: L
authors.forename: Dagmar
authors.initials: D
authors.lastname: Pokorová
authors.forename: Martin
authors.initials: M
authors.lastname: Knytl
mesh_terms: D000818:Animals; D002347:Carps / Q000235:genetics*; D018153:Czech Republic / Q000453:epidemiology; D005260:Female; D005393:Fish Diseases / Q000453:epidemiology / Q000401:mortality*; D020022:Genetic Predisposition to Disease; D006564:Herpesviridae / Q000145:classification*; D006566:Herpesviridae Infections / Q000453:epidemiology / Q000401:mortality / Q000662:veterinary* / Q000821:virology; D060106:Lakes; D011003:Ploidies; D045483:Rivers