Navigation Links
Risks involved with transgenic fish
Date:8/31/2009

Fast growing transgenic fish can revolutionise commercial fish farming and relieve the pressure on overexploited fish stocks. But what happens in the natural environment if transgenic fish escape? Researchers at the University of Gothenburg have studied transgenic fish on behalf of the EU and are urging caution: -Until further notice transgenic fish should be bred in closed systems on land, says Fredrik Sundstrm at the Department of Zoology, University of Gothenburg.

By furnishing fish with genes from other organisms, so-called transgenes, researchers have succeeded in producing fish that grow considerably faster or are more resistant to diseases. Fish can also be modified to cope better with cold, which facilitates breeding in colder conditions. There are major benefits for commercial fish farming as transgenic fish are expected to deliver higher production and better yields. However, transgenic fish can also entail risks and undesirable effects on the natural environment.

More resistant to toxins

For example, transgenic fish can be more resistant to environmental toxins, which could entail the accumulation of toxins that ultimately end up in consumers. There are also misgivings that the higher level of growth hormone in the fish can affect people. Researchers at the University of Gothenburg have therefore been commissioned by the EU to study the environmental effects of GMO (genetically modified organisms) within fish farming. The results of the studies show that the genetically modified fish should be treated with great care.

Fredrik Sundstrm, PhD at the Department of Zoology, has studied transgenic salmon and rainbow trout to ascertain what ecological risks they might constitute for the natural environment. The study, which simulated escapes in a laboratory environment, shows that transgenic fish have a considerably greater effect on the natural environment than hatchery-reared non-transgenic fish when they escape. For example, genetically modified fish survive better when there is a shortage of food, and benefit more than non-transgenic fish from increasing water temperatures.

It is probably due to the fact that genetically modified fish have a greater ability to compete and are better at converting food, says Fredrik Sundstrm.

Natural breeds are under threat

If transgenic fish become established in natural stocks they would be able to outcompete the natural breeds. However, conducting studies in a laboratory environment that imitates nature is complicated, which makes it difficult to predict how escaped transgenic fish affect the natural environment. Fredrik Sundstrm's conclusion is that international consensus is required before commercial farming can be permitted, and that a precautionary principle must be applied.

One option is to farm the transgenic fish on land, which would make escape impossible. At least fertile fish should be kept in a closed system, says Fredrik Sundstrm. As of yet no country has permitted commercial farming of transgenic fish, but several applications for such operations are under consideration by authorities in both the USA and the EU.


'/>"/>

Contact: Fredrik Sundstrom
fred.sundstrom@gmail.com
46-073-408-4922
University of Gothenburg
Source:Eurekalert  

Related biology news :

1. Preimplantation genetic diagnosis may pose neurological risks
2. Climate change: Global risks, challenges and decisions
3. Newly described contaminant sources in Katrina-flooded homes pose health risks
4. Rice eyes risks of quantum dots
5. New insights into a leading poultry disease and its risks to human health
6. Athletes not spared from health risks of metabolic syndrome
7. More freedom to take risks: DFG funds the first Reinhart Koselleck Projects
8. Vitamin D deficiency in infants and nursing mothers carries long-term disease risks
9. USC researchers head global effort to study genetic risks that contribute to psychiatric diseases
10. 6 environmental research studies reveal critical health risks from plastic
11. African-Americans have unique lung cancer risks from chronic obstructive pulmonary disease
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Risks involved with transgenic fish
(Date:6/9/2016)... 9, 2016 Paris Police ... video security solution to ensure the safety of people and ... during the major tournament Teleste, an international technology ... services, announced today that its video security solution will be ... back up public safety across the country. The system roll-out ...
(Date:6/2/2016)... Perimeter Surveillance & Detection Systems, ... Infrastructure, Support & Other Service  The latest ... comprehensive analysis of the global Border Security market ... of $17.98 billion in 2016. Now: In ... in software and hardware technologies for advanced video surveillance. ...
(Date:5/12/2016)... DALLAS , May 12, 2016 ... has just published the overview results from the Q1 ... of the recent wave was consumers, receptivity to a ... wearables data with a health insurance company. ... choose to share," says Michael LaColla , CEO ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks ... to industrial engineering, was today awarded as one ... selection of the world,s most innovative companies. Ginkgo ... scale for the real world in the nutrition, ... engineers work directly with customers including Fortune 500 ...
(Date:6/24/2016)... ... 2016 , ... While the majority of commercial spectrophotometers and fluorometers use the ... models are higher end machines that use the more unconventional z-dimension of 20mm. ... the bottom of the cuvette holder. , FireflySci has developed several Agilent flow ...
(Date:6/23/2016)... Wausau, WI (PRWEB) , ... June 23, 2016 ... ... probiotic supplements, is pleased to announce the launch of their brand, UP4™ Probiotics, ... supplements for over 35 years, is proud to add Target to its list ...
(Date:6/23/2016)... 2016 A person commits a crime, and the ... track the criminal down. An outbreak of foodborne ... Administration (FDA) uses DNA evidence to track down the bacteria ... far-fetched? It,s not. The FDA has increasingly used a complex, ... foodborne illnesses. Put as simply as possible, whole genome sequencing ...
Breaking Biology Technology: