Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chinese expedition traces source of global fish invasion

09.07.2010
Bournemouth University (BU) Professor Rudy Gozlan is leading an Anglo-Chinese expedition through remote parts of China in the weeks ahead to discover the origins of a global fish invasion.

Together with colleagues from BU and the Chinese Academy of Science, Professor Gozlan will travel over 10,000 kilometres along two major rivers – the Huang He (Yellow) and Chang Jiang (Yangtze) – to collect samples of a species of Topmouth gudgeon.

Professor Gozlan, of the University’s Centre for Conservation Ecology and Environmental Change, is producing a blog of his journey which can be followed at http://www.expeditionchina2010.blogspot.com/.

The expedition represents a scientific, cultural and historical journey as Professor Gozlan traces the historic movement of the gudgeon from its native East China to become one of the world’s most prolific invasive species with populations extending as far as Europe and North Africa.

Recently, Professor Gozlan has identified that populations of the Topmouth gudgeon outside of China are healthy carriers of a deadly non-species specific parasite (Sphaerothecum destruens). These parasite-carrying gudgeons pose a threat to fish diversity, particularly in Europe where invaluable salmon stocks important to Britain’s aquaculture industry are at risk.

“This is the story of an innocent movement of fish from the East coast to the West part of China which has rippled all the way to Britain some 50 years later,” said Professor Gozlan. “The Topmouth gudgeon is small in size (maximum length circa 9cm), highly fecund with batch spawning and nest guarding behaviour and highly tolerant to environmental changes giving it all of the attributes of a successful invader.”

The Topmouth gudgeon’s first introduction outside of China was in reservoirs and ponds around the Black Sea as part of a fish farming agreement between China and the former Eastern block. Following long distances and hitchhiking cross country with movements of carp, it rapidly escaped and colonised local waters, dominating communities in ponds and lakes.

“The gudgeon’s stealth invasion of the world started in the 1950’s with the end of the Chinese civil war (from around 1840 to 1949) which had restricted human population mobility and trade,” said Professor Gozlan. “At that time, there was an increasing need for developing new sources of animal protein and black carp, grass carp, silver carp and big head carp were rapidly introduced from East China especially from the middle and lower reaches of the Yangtze River basin to many other places including Yunnan, Qinghai, Gansu and Xinjiang.

"This species had been cultured traditionally in East China for a long time with specific culturing techniques,” he continued. “These carp introductions for aquaculture, however, have been the beachhead of topmouth gudgeon’s great escape.”

During the expedition, Professor Gozlan is gathering material including live samples of Topmouth gudgeon from 33 locations covering nine major catchments. The samples will be compared to material collected from populations established from the first introduction in each country within the non-native range.

Populations will be compared for their life history traits and parasitic communities as well as their population genetic structure within native range but also across the introduced range.

Professor Rudy Gozlan’s Academic Profile - http://www.bournemouth.ac.uk/about/people_at_bu/our_academic_staff/CS/

profiles/rgozlan.html

Charles Elder | Bournemouth University (BU)
Further information:
http://www.bournemouth.ac.uk
http://www.expeditionchina2010.blogspot.com/

Further reports about: Chang Chinese herbs Gozlan Yangtze River environmental change

More articles from Life Sciences:

nachricht For a chimpanzee, one good turn deserves another
27.06.2017 | Max-Planck-Institut für Mathematik in den Naturwissenschaften (MPIMIS)

nachricht New method to rapidly map the 'social networks' of proteins
27.06.2017 | Salk Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Touch Displays WAY-AX and WAY-DX by WayCon

27.06.2017 | Power and Electrical Engineering

Drones that drive

27.06.2017 | Information Technology

Ultra-compact phase modulators based on graphene plasmons

27.06.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>