Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Stealth parasite threatens European fish

23.06.2005


A new deadly disease, carried by an invasive fish species, is threatening European fish diversity according to a paper published in the journal Nature on 23 June 2005.



Lead author Rodolphe Gozlan from the Centre for Ecology & Hydrology (CEH) said: "We have found a parasite that may pose a severe threat to some freshwater fish species in Europe. This discovery has major biological implications and may have economic implications."

The scientists working for CEH and the Centre for the Environment, Fisheries & Aquaculture Science (CEFAS) have found an infectious disease carried by the topmouth gudgeon - the most invasive fish species in Europe. The disease stops the European sunbleak, an endangered species in mainland Europe (although not native to the UK), from spawning - leading to its rapid decline and possible eventual extinction.


The scientists blame the disease for the rapid demise of the sunbleak in parts of Europe following the spread of the Asian topmouth gudgeon. "The new disease is already affecting other freshwater fish such as the fathead minnow and may affect native UK fish species," added Dr Gozlan.

But the researchers, funded by Natural Environment Research Council and Defra, found that the parasite does not harm the topmouth gudgeon.

Dr Gozlan said: "The topmouth gudgeon is a healthy host for this deadly parasite." "This parasite could threaten commercial fisheries, including salmon farms," he went on to say.

The researchers believe the parasite is closely related to Rosette Agent, identified in the United States for the first time in 1986, which kills salmon and similar species, both farmed and wild. Work is in progress to determine any differences between the present parasite and Rosette Agent.

The scientists say more work is required to determine the extent of the threat to European fish diversity, but have observed that sunbleak populations have declined dramatically in the last forty years and the species is now on the European list of threatened freshwater fishes. This decline coincides with the rise in numbers of the topmouth gudgeon and its rapid spread throughout Europe since its introduction into Romanian ponds close to the river Danube in the 1960s.

Topmouth Gudgeon have been recorded in several rivers and lakes in England and Wales.

Barnaby Smith | alfa
Further information:
http://www.nerc.ac.uk
http://www.ceh.ac.uk

More articles from Ecology, The Environment and Conservation:

nachricht How does the loss of species alter ecosystems?
18.05.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

nachricht Excess diesel emissions bring global health & environmental impacts
16.05.2017 | International Institute for Applied Systems Analysis (IIASA)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New Method of Characterizing Graphene

Scientists have developed a new method of characterizing graphene’s properties without applying disruptive electrical contacts, allowing them to investigate both the resistance and quantum capacitance of graphene and other two-dimensional materials. Researchers from the Swiss Nanoscience Institute and the University of Basel’s Department of Physics reported their findings in the journal Physical Review Applied.

Graphene consists of a single layer of carbon atoms. It is transparent, harder than diamond and stronger than steel, yet flexible, and a significantly better...

Im Focus: Strathclyde-led research develops world's highest gain high-power laser amplifier

The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.

The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

3D printer inks from the woods

30.05.2017 | Life Sciences

How circadian clocks communicate with each other

30.05.2017 | Life Sciences

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible

30.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>