Viral diseases of wild and farmed European eel Anguilla anguilla with particular reference to the Netherlands

Beurden, Steven J. van; Engelsma, Marc; Roozenburg, Ineke; Voorbergen-Laarman, Michal; Tulden, P.W. van; Kerkhoff, S.; Nieuwstadt, A. P. van; Davidse, Aart; Haenen, O.L.M.

doi:10.3354/dao02501

Cited by 43 publications

(69 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…() also found that EVE can be isolated from apparently healthy eels, so the results of this study present a similar situation in the Lough Neagh European eels. These findings are significant as EVE is the causal agent of branchionephritis in eels (Okamoto et al., ; Van Beurden et al., ) that has been reported to cause 100% mortality (Chen et al., ).…”

Section: Discussionmentioning

confidence: 96%

“…Infection may result in a severe haemorrhagic disease, anaemia and the presence of blood in the abdominal cavity (Shchelkunov et al., ; Van Ginneken & Maes, ). Infected eels may also display “head down” swimming behaviour, pectoral and anal fin congestion (Van Beurden et al., ) and produced 59% mortality in infections of the Japanese eel ( Anguilla japonica ) (Kobayashi & Miyazaki, ). HVA was first isolated in diseased European eels by Davidse et al.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

First examination of the Lough Neagh European eel (Anguilla anguilla) population for eel virus European, eel virus European X and Anguillid Herpesvirus‐1 infection by employing novel molecular techniques

McConville

Fringuelli

Evans

et al. 2018

Journal of Fish Diseases

View full text Add to dashboard Cite

Lough Neagh is home to the largest wild-caught European eel (Anguilla anguilla) commercial fishery in the EU, producing 14% of the EU catch and worth £3.2 million to the local economy. Viral infections have been suggested to play a contributory role in the decline of the worldwide eel stock, but previous studies of the Lough Neagh European eel population had not observed either acute or chronic viral signs. Eel virus European (EVE), Eel virus European X (EVEX) and Anguillid herpesvirus-1 (HVA) have been detected throughout Europe and as the Lough Neagh eel fishery is supplemented by re-stocking of eels from France, Spain and the United Kingdom and these viral infections may be asymptomatic, it is vital that the viral pathogen prevalence in the Lough is accurately determined. This study aimed to ascertain the presence of these viruses in the Lough Neagh European eel population by employing novel molecular techniques testing specifically for the presence of EVE, EVEX and HVA. No evidence was found of HVA infection, whereas EVE and EVEX were found, albeit at a very low prevalence.

show abstract

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

First examination of the Lough Neagh European eel (Anguilla anguilla) population for eel virus European, eel virus European X and Anguillid Herpesvirus‐1 infection by employing novel molecular techniques

McConville

Fringuelli

Evans

et al. 2018

Journal of Fish Diseases

View full text Add to dashboard Cite

show abstract

“…Experiences from AngHV1 outbreaks in high‐density intensive recirculation production systems in the Netherlands suggested that the disease is stress‐induced and often part of a double infection with another virus (Van Beurden et al . ). Results from experimental infection studies were suggestive for the capability of AngHV1 to cause a latent infection (Van Nieuwstadt, Dijkstra & Haenen ).…”

Section: Introductionmentioning

confidence: 97%

Development and validation of a real‐time PCR assay for the detection of anguillid herpesvirus 1

Beurden

Voorbergen-Laarman

Roozenburg

et al. 2015

Journal of Fish Diseases

Self Cite

View full text Add to dashboard Cite

Anguillid herpesvirus 1 (AngHV1) causes a haemorrhagic disease with increased mortality in wild and farmed European eel, Anguilla anguilla (L.) and Japanese eel Anguilla japonica, Temminck & Schlegel). Detection of AngHV1 is currently based on virus isolation in cell culture, antibody-based typing assays or conventional PCR. We developed, optimized and concisely validated a diagnostic TaqMan probe based real-time PCR assay for the detection of AngHV1. The primers and probe target AngHV1 open reading frame 57, encoding the capsid protease and scaffold protein. Compared to conventional PCR, the developed real-time PCR is faster, less labour-intensive and has a reduced risk of cross-contamination. The real-time PCR assay was shown to be analytically sensitive and specific and has a high repeatability, efficiency and r 2 -value. The diagnostic performance of the assay was determined by testing 10% w/v organ suspensions and virus cultures from wild and farmed European eels from the Netherlands by conventional and realtime PCR. The developed real-time PCR assay is a useful tool for the rapid and sensitive detection of AngHV1 in 10% w/v organ suspensions from wild and farmed European eels.

show abstract

“…These include loss of habitat and reduced habitat quality (Feunteun 2002), bioaccumulation of toxins (Belpaire et al 2009), impacts of parasites (Kirk 2003;Palstra et al 2007) and disease (Van Ginneken et al 2005;van Beurden et al 2012), overharvest (Briand et al 2003), and oceanic climate changes such as shallowing of the mixed layer depth and reduced primary productivity near the spawning grounds which may impair the survival and transport of leptocephali (Knights 2003;Friedland et al 2007;Kettle et al 2008). These include loss of habitat and reduced habitat quality (Feunteun 2002), bioaccumulation of toxins (Belpaire et al 2009), impacts of parasites (Kirk 2003;Palstra et al 2007) and disease (Van Ginneken et al 2005;van Beurden et al 2012), overharvest (Briand et al 2003), and oceanic climate changes such as shallowing of the mixed layer depth and reduced primary productivity near the spawning grounds which may impair the survival and transport of leptocephali (Knights 2003;Friedland et al 2007;Kettle et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Movement patterns of seaward migrating European eel (Anguilla anguilla) at a complex of riverine barriers: implications for conservation

Piper

Svendsen

Wright

et al. 2015

Ecology of Freshwater Fish

View full text Add to dashboard Cite

River infrastructure such as weirs and hydropower stations commonly present migrating fish with multiple potential passage routes. Knowledge of the cues fish use to navigate such environments is required to protect migrants from hazardous areas and guide them towards safe passage; however, this is currently lacking for many species. Employing high-resolution positioning telemetry, this study examined movements of downstream migrating adult European eel, Anguilla anguilla, as they encountered a complex of water control structures in one location on the River Stour, southern England. The distribution of eels across five potential routes of passage differed from that predicted based on proportion of discharge alone. Certain routes were consistently avoided, even when the majority of flow passed through them. Passage distribution was partially explained by avoidance in the vicinity of a floating debris boom. Movement paths were nonrandomly distributed across the forebay and eels moved predominantly within a zone 2-4 m from the channel walls. Understanding of avoidance and structure oriented movementation exhibited by eels will help advance effective guidance and downstream passage solutions for adults.

show abstract

Viral diseases of wild and farmed European eel Anguilla anguilla with particular reference to the Netherlands

Cited by 43 publications

References 63 publications

First examination of the Lough Neagh European eel (Anguilla anguilla) population for eel virus European, eel virus European X and Anguillid Herpesvirus‐1 infection by employing novel molecular techniques

First examination of the Lough Neagh European eel (Anguilla anguilla) population for eel virus European, eel virus European X and Anguillid Herpesvirus‐1 infection by employing novel molecular techniques

Development and validation of a real‐time PCR assay for the detection of anguillid herpesvirus 1

Movement patterns of seaward migrating European eel (Anguilla anguilla) at a complex of riverine barriers: implications for conservation

Contact Info

Product

Resources

About