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:8/6/2015)... BOSTON and TELTOW, Germany ... the 2015 Siggraph Conference, SensoMotoric Instruments (SMI) ... augmented reality , based on Epson,s Moverio ... eye tracking platform. With this new solution, unprecedented quality ... multi-modal, hands-free interaction with context-sensitive displays. For the first ...
(Date:8/5/2015)... VIEW, Calif. , Aug. 5, 2015 ... exhibits continuous growth in applications, penetration into newer sectors, ... after year. The global biosensors space has seen the ... exited the market so far. (Photo - ... Frost & Sullivan, Analysis of the Global Biosensors ...
(Date:7/31/2015)... 31. juli 2015 Den 10. internationale konference ... BGI fra den 22. - 25. oktober i ... sin 10-års fødselsdag i år. Siden starten i 2006 ... møder på ,omik,-feltet, og er en af de mest ... ICG-10 fokuserer på nylige gennembrud og fremskridt inden for ...
Breaking Biology News(10 mins):SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 2SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 3Innovative Biosensors Incite Use in Non-Traditional Applications 2Innovative Biosensors Incite Use in Non-Traditional Applications 3Innovative Biosensors Incite Use in Non-Traditional Applications 4Den 10. internationale konference om Genomics (ICG-10) åbner i oktober 2
... from Past Emergency Response , In a special ... lessons learned during past incidents involving emergency evacuations, ... emergency response (some involving radiation). Presenters use these ... paper ("Assessment of Emergency Response Planning and Implementation ...
... Society for Microbiology (ASM) Eli Lilly and Company Research ... Professor of Biology and Geobiology, Massachusetts Institute of Technology. ... microbiology or immunology by an individual on the threshold ... a pioneering young scientist who has championed the field ...
... 2008The 2008 American Society for Microbiology (ASM) Gen-Probe ... Vice-President, Technical and Business Development, IHRC, Inc., Atlanta, ... has exhibited exemplary leadership and service in the ... known worldwide for applying molecular biology techniques to ...
Cached Biology News:Emergency response and nanotechnology 2American Society for Microbiology honors Dianne K. Newman 2American Society for Microbiology honors Bala Swaminathan 2
(Date:8/26/2015)... 2015 Despite recent market ... optimism in biotech,s forecast is the recent run ... advancements.  Active biotechnology & healthcare companies with recent ... PBIO), Sequenom, Inc. (NASDAQ: SQNM ), Sarepta ... Corp. (NASDAQ: RPTP ) and EnteroMedics Inc. ...
(Date:8/26/2015)... ... 2015 , ... The 2015 Epigenomics & Metabolomics Meeting in Boston ... Asymmetrex to share the first report on progress with its crowdsourcing campaign designed ... tissue stem cells. , With a name like “H2A.Z asymmetry,” the new biomarker would ...
(Date:8/25/2015)... CARDIFF, UK (PRWEB) , ... August 25, 2015 ... ... accurately determining whether breast tissue lesions are cancerous is described by University of ... the international society for optics and photonics. , In “ Breast cancer diagnosis ...
(Date:8/25/2015)... , Aug. 25, 2015 Human Longevity, Inc. (HLI), ... Winham has joined the company as Chief Operating Officer. ... medical operations and technical experience, will report directly to HLI,s ... In this new role as COO, Winham will be responsible ... as well as all facility operations. HLI currently has three ...
Breaking Biology Technology:New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 2New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 3New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 4New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 5New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 6New Collaborations & Mergers For Research of Molecular Biomarkers in Human Diseases & Clinical Trials for Cancer Therapies Fueling Growth in Multi-Billion Dollar Life Sciences Market 7Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 2Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 3Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 4New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 2New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 3New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 4Human Longevity, Inc. Hires Life Sciences Leader, Mark Winham, as Chief Operating Officer 2
... Almost by accident, I find myself on what must surely ... the past few months, I have tried the best designs ... I've tried has great strengths and a few tradeoffs, usually ... along comes a Bluetooth wireless headset from a newcomer to ...
... major advantages , ,MADISON, Wis. Wisconsins biotechnology ... feature appearing in the June issue of Modern Drug ... clusters in Madison and Milwaukee, and attributes the growth ... and universities, the Wisconsin Alumni Research Foundation , ...
... lack of funding cited as problems , ,MADISON ... and keep customers happy isnt exactly a revolutionary practice. ... lack funding, even the smallest technological alteration can be ... Matt Miszewski and other speakers described this paradox and ...
Cached Biology Technology:The quest for the perfect headset 2The quest for the perfect headset 3Wisconsin biotech sector featured in scientific magazine 2Wisconsin biotech sector featured in scientific magazine 3State CIO discusses IT and government 2
... Chromo4 real-time PCR detector is an optical ... a DNA Engine or Dyad Disciple gradient-capable ... a compact scanning photonics shuttle that contains ... 500-535 nm, 555-585 nm, 620-650 nm) and ...
... highly sensitive laser confocal systems designed for ... scanners that meet your expectations, differentiating between ... optimizing the signal on the bottom as ... range for increased sensitivity. Results with VersArray ...
... four slides. The new ArraySlide 24-4 chamber ... x 7mm) individual printing surfaces for multiple ... studies. Unlike other systems, this device utilizes ... of contaminating adhesives. The chamber itself is ...
... x 3 nmol (individual) with sequence ... specifically targeted to your target gene of interestis ... you get more than 75% knockdown of your ... nM siRNA for transfection and confirmation of optimal ...
Biology Products: