Navigation Links
Fish food fight: Fish don't eat trees after all, says new study
Date:11/24/2009

in Millbrook, N.Y., was a large-scale experiment on three lakes in Michigan. Researchers fertilized these lakes with a labeled form of carbon dioxide sprinkled on the lakes' surfaces over more than a month. They then analyzed how much of that labeled carbon showed up in animals at each position in the aquatic food web. Even when terrestrial plant matter was only about 20 percent of the available food, they found, the animals appeared to be composed of about 50 percent land-based carbon.

The UW study took a different approach. Brett and colleagues raised zooplankton in the lab, feeding them a diet of either pure algae, pure land-based carbon, or various mixtures of the two. They found that zooplankton fed a purely land-based diet survived and reproduced but were small and produced relatively few offspring. Zooplankton fed a diet of pure algae were 10 times bigger than their tree-fed twins and produced 20 times more offspring. Zooplankton fed a mixed diet were larger and produced more offspring as the proportion of algae in their diet went up. Even when zooplankton ate almost nothing but land-based carbon, nearly all their lipids came from algae.

"I think we were able to show that the terrestrial source is such low quality that it's inconceivable that it could be nearly as important as what that study suggested," Brett said.

This research was funded by the National Science Foundation. Co-authors are Sami Taipale and Hari Seshan of the UW and Martin Kainz of the Danube University Krems in Austria.

So why did the earlier study suggest that fish were eating land-based food? Brett believes the reason is those researchers discounted the idea of zooplankton migration, the daily movement down to deeper waters during the daytime to hide from predatory fish. Researchers sprinkled tagged food in the upper waters and assumed that any other food source must be land-based.

"The flaw was that there was an alternative source. They could h
'/>"/>

Contact: Hannah Hickey
hickeyh@uw.edu
206-543-2580
University of Washington
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Prevent periodontitis to reduce the risk of head and neck cancer
2. Periodontitis and myocardial infarction: A shared genetic predisposition
3. Time of day matters to thirsty trees, U of T researcher discovers
4. Ants are friendly to some trees, but not others
5. As ash borer claims more trees, researcher at ISU works for species survival
6. Electrical circuit runs entirely off power in trees
7. Large trees declining in Yosemite
8. New discovery suggests trees evolved camouflage defense against long extinct predator
9. Tires made from trees -- better, cheaper, more fuel efficient
10. Ferns took to the trees and thrived
11. When palm trees gave way to spruce trees
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... study aimed at improving the food intake, health and ... homes is among three projects at the University of ... the Canadian Institutes of Health Research (CIHR). , ... Sciences at Waterloo, and a Schlegel research chair in ... to investigate why many Canadians living in long-term care ...
(Date:8/21/2014)... , Saturday to Wednesday, Oct. 18-22, 2014 , ... W. Harbor Drive, San Diego, CA 92101 , ... and other presentations of the latest research in ... plenary session featuring high-scoring abstracts on rare genetic ... various cancers, and treatment for sun sensitivity (Saturday, ...
(Date:8/21/2014)... Researchers from North Carolina State University have developed a ... The model has applications for creating new materials as ... , "Our new technique allows us to model much ... so much more quickly," says Nan Li, lead author ... student in NC State,s Department of Materials Science and ...
Breaking Biology News(10 mins):Grants will fund landmark aging research at Waterloo 2American Society of Human Genetics 2014 Annual Meeting 2Researchers develop models to study polyelectrolytes, including DNA and RNA 2
... from their homes in Far North Queensland have been ... according to a collaborative research project by The University ... Service. Professor Craig Franklin, from the University,s School ... the northern tip of Australia to reach home ...
... influence nearly every part of children,s daily lives, according ... of the American Journal of Preventative Medicine. The ... of Michigan, reveal that, in most middle and high ... companies give students easy access to sugary beverages. ...
... and world-renowned expert on bird speciation has compiled ... recently published book, Speciation in Birds. Trevor ... evaluates the contributions of sexual selection and natural ... geographical isolation, ecological differentiation and genetic drift. He ...
Cached Biology News:Saltwater crocodiles can find their way home 2Studies: Children obese due to a host of unhealthy pressures 2Studies: Children obese due to a host of unhealthy pressures 3Studies: Children obese due to a host of unhealthy pressures 4University biologist publishes book on bird speciation 2
(Date:8/22/2014)... -- Research and Markets has announced the ... & Reagents (Cloning, Epigenetics, PCR, Restriction Digestion, Sequencing) Market ... The global molecular biology enzymes market ... expected to grow at a CAGR of 13.74% to ... & reagents find applications in a large number of ...
(Date:8/22/2014)... (PRWEB) August 22, 2014 “Our ... acknowledgement is a national disgrace. Furthermore, every governmental ... establishing the current, deplorable state of unorganized dysfunction ... great mistakes," to merely serve as a device ... extent of colossal failure(s) that have accumulated through ...
(Date:8/21/2014)... DESY scientists has observed tiny quantum vortices in cold ... journal Science that the exotic vortices arrange ... is the first time that the quantum vortices, which ... is known as superfluid helium, have been detected in ... Andrey Vilesov of the University of Southern California, one ...
(Date:8/21/2014)... N.Y. , Aug. 21, 2014 ... launch of their Nutraceutical "TELO-20 for Dogs" with ... only Telomere-lengthening supplement in the world for dogs. ... of every chromosome in the body. A wealth ... leading experts in Telomere Science and Aging, including ...
Breaking Biology Technology:Global Molecular Biology Enzymes, Kits, & Reagents (Cloning, Epigenetics, PCR, Restriction Digestion, Sequencing) Market - Forecast to 2018 2Global Molecular Biology Enzymes, Kits, & Reagents (Cloning, Epigenetics, PCR, Restriction Digestion, Sequencing) Market - Forecast to 2018 35 Great Mistakes in Healthcare and How to Fix Them by Dr. Ira Williams 2Scientists observe quantum vortices in cold helium droplets 2Telomere Biosciences Announces: TELO-20 for Dogs, the World's First Telomere-Lengthening Supplement for Dogs, to Promote Healthy Aging and Longevity 2Telomere Biosciences Announces: TELO-20 for Dogs, the World's First Telomere-Lengthening Supplement for Dogs, to Promote Healthy Aging and Longevity 3
... From toothpaste to technology, noncrystalline or amorphous silica is ... we use in our daily lives. As a minor, ... silica reactivity in physiological environments is crucial to the ... bone-like properties. , One ongoing question is why solutions ...
... July 7 Medarex, Inc.,(Nasdaq: MEDX ) invites ... a live webcast of its 2008 R&D Day event. ... 8:00 a.m. Eastern Time and is expected to,last approximately ... overview of the company,s strategy, progress and new information,about ...
... of the Ferring Research,Infertility and Gynaecology GrAnt (FRIGGA) ... Reproduction & Embryology Congress. The two,winners of this ... The,Netherlands and the Universitair Ziekenhuis (UZ) Brussel, Centre ... selected for their outstanding,proposals for fundamental research to ...
Cached Biology Technology:New insight to demineralization 2Medarex Announces July 10 Live Webcast of R&D Day Event 2Ferring Research Infertility and Gynaecology GrAnt (FRIGGA) 2008 Winners Announced 2Ferring Research Infertility and Gynaecology GrAnt (FRIGGA) 2008 Winners Announced 3
... The EZ-Tn5™ Plasmid-Based Deletion Machine is ... vitro transposition system developed by Goryshin and ... generation of nested families of deletions and ... cloned in a transposon-containing plasmid vector. Although ...
High affinity antibodies recognizes HSP70 protein from human cardiac tissue. Could be used for Westerb blotting application, ELISA....
... kit is designed to knockout or alter genes ... than one week. Red/ET recombination allows the exchange ... specific, and faithful manner. An FRT-flanked kanamycin resistance ... can be used to replace a gene on ...
The VersArray hybridization chamber is used for manual (coverslip) hybridization of microarrays. The chamber accommodates 2 slides and is watertight to allow incubation of slides in a water bath. Dim...
Biology Products: