Navigation Links
Fish migrate to safer environments

Research now reveals that fish can migrate to avoid the threat of being eaten. A new study from Lund University in Sweden shows that roach fish leave lakes and move into surrounding streams or wetlands, where they are safer from predators.

Every year, millions of animals migrate worldwide. In most cases, this is due to a shortage of food or other environmental factors. However, few research studies have focused on migration as a strategy to avoid predators. It is not easy to measure and quantify the risk of an animal being eaten.

"Our findings are therefore quite unique", says Ben Chapman, a researcher from the Department of Biology at Lund University.

In collaboration with Danish colleagues, the researchers at Lund University have published the results of their study. These show that fish, in this case roach, flee from a lake to surrounding streams and wetlands when there are a large number of cormorants hunting in the lake. Ben Chapman and his colleagues note that their findings are among the first evidence that the threat of predators can be a reason for seasonal migration in animals.

The researchers used an inventive method to track the fate of individual roach. They individually marked thousands of fish with a little chip resembling a barcode, and then went to the cormorants' resting places and scanned the earth for chips in the birds' excrement i.e. the remains of the fish that have passed through the birds' digestive systems. In this way, the researchers have been able to obtain large quantities of data on which fish were eaten. It emerged that it was mostly larger roach that fell victim to the cormorants.

The fieldwork has been carried out in the Danish lakes of Viborg and Loldrup on Jutland. In the next fieldwork season, the researchers plan to expand their work to include Krankesjn lake in southern Sweden and to investigate whether fish can change their migration patterns in response to increasing numbers of predators.

Contact: Ben Chapman
Lund University

Related biology news :

1. Global warming has driven Europes mountain plants to migrate 2.7 meters upwards in 7 years
2. BYU study: Using a gun in bear encounters doesnt make you safer
3. New antibiotic could make food safer and cows healthier
4. Wayne State University researchers program targets safer river fishing, anglers health
5. Dual action polyclonal antibody may offer more effective, safer protection against osteoporosis
6. Safer spinach? Scientists technique dramatically reduces E. coli numbers
7. Salk scientists develop faster, safer method for producing stem cells
8. New technique could make cell-based immune therapies for cancer safer and more effective
9. Survival of the fittest -- ESF hosts session on the challenges of life in extreme environments
10. Newfound gene may help bacteria survive in extreme environments
11. Southampton to help develop new crops for water-stressed environments
Post Your Comments:
(Date:11/19/2015)... Nov. 19, 2015  Although some 350 companies are ... by a few companies, according to Kalorama Information. These include ... of the market share of the 6.1 billion-dollar molecular ... World Market for Molecular Diagnostic s .    ... is still controlled by one company and only a ...
(Date:11/18/2015)... 18, 2015 --> ... new market report titled  Gesture Recognition Market - Global ... - 2021. According to the report, the global gesture recognition market was ... to reach US$29.1 bn by 2021, at a CAGR ... North America dominated the global gesture recognition ...
(Date:11/17/2015)... Paris , qui s,est tenu ... Paris , qui s,est tenu du 17 au ... l,innovation biométrique, a inventé le premier scanner couplé, qui ... même surface de balayage. Jusqu,ici, deux scanners étaient nécessaires, ... digitales. Désormais, un seul scanner est en mesure de ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... ... November 25, 2015 , ... Jessica ... on AngelList early in their initial angel funding process. Now, they are paying ... looking to make early stage investments in the microbiome space. In this, ...
(Date:11/24/2015)... , Nov. 24, 2015 Cepheid (NASDAQ: ... speaking at the following conference, and invited investors to ... NY      Tuesday, December 1, 2015 at 11.00 ... NY      Tuesday, December 1, 2015 at 11.00 ... Conference, New York, NY      Tuesday, ...
(Date:11/24/2015)... , ... November 24, 2015 , ... ... healthy metabolism. But unless it is bound to proteins, copper is also toxic ... (NIH), researchers at Worcester Polytechnic Institute (WPI) will conduct a systematic study of ...
(Date:11/24/2015)... -- Clintrax Global, Inc., a worldwide provider of clinical research services headquartered ... the company has set a new quarterly earnings record in Q3 ... posted for Q3 of 2014 to Q3 of 2015.   ... , with the establishment of an Asia-Pacific ... United Kingdom and Mexico , with ...
Breaking Biology Technology: