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:3/24/2015)... March 24, 2015   NexID Biometrics LLC, ... security-authentication needs, today announced the beginning of shipments of ... The company, based in Potsdam, ... three-day Connect:ID Expo, which began here today at the ... version 2.0 of its SDK boosts the accuracy rate ...
(Date:3/23/2015)... BOSTON, Mass , March 23, 2015 SoundView ... shipment of NXT-ID,s (NASDAQ: NXTD ) Wocket smart wallet. SoundView ... world user feedback on their experience with the Wocket in ... experience at CVS, Whole Foods and other retailers, making both ... Kris Tuttle also says, "If the company meets ...
(Date:3/23/2015)... , March 23, 2015  In the 2014 fiscal ... case conviction losses. This figure accounts for a fraction ... to The Nilson Report, exceeds $11 billion globally. The ... after a crime has occurred. Investor Mark Saint ... expert Joe Paolella partnered to administer the ...
Breaking Biology News(10 mins):NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 3Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 4Polygraph Test Now Used to Protect Investors From Fraud 2Polygraph Test Now Used to Protect Investors From Fraud 3
... come out of research conducted on the edge of ... Olduvai Gorge in Tanzania since that produced by Louis ... a special issue of the prestigious Journal of ... of the Bernard Price Institute for Palaeontological Research, and ...
... on a unique vertebrate called the sea lamprey shows that ... development. These genes are paradoxically lost all throughout the developing ... or PGCs. The PGCs can be thought of as embryonic ... generation of lampreys. Based on computational analysis, a significant number ...
... rapidly create healthy clots and nearly double the survival ... research shows. "We knew an injection of these ... bleeding is stopped in time to increase survival following ... at Case Western Reserve University and leader of the ...
Cached Biology News:Dawn of humanity illuminated in special journal edition - 50 years after the Leakeys 2Research reveals unique solution to gene regulation 2Nanoparticles added to platelets double internal injury survival rate 2
(Date:3/27/2015)... March 27, 2015 WuXi PharmaTech (Cayman) ... R&D capability and technology platform company serving the ... today that an Investigational New Drug (IND) application ... rheumatoid arthritis has been accepted for review by ... In September 2012, MedImmune, the global ...
(Date:3/26/2015)... SQI Diagnostics Inc. ("SQI" or the "Company") (TSX-V: SQD; ... including the appointment of auditors, its annual and special ... "Meeting") was adjourned, as previously disclosed on March 25, ... Toronto time). The date of the ... The Meeting will reconvene at the offices of the ...
(Date:3/26/2015)... BOSTON , March 26, 2015 /PRNewswire/ ... ), a global clinical research organization ... signed a definitive agreement to acquire all ... India ("QSI"), a leading provider of specialized ... refers to the collection, detection, assessment, monitoring, ...
(Date:3/25/2015)... pharmaceutical market is one of the most ... its absolute size, plus a growing economy and increasing ... Business Monitor International. The Russian market is set to ... market, with growth estimates around 10-15% annually reaching an ... About Green Cross Green Cross provides ...
Breaking Biology Technology:Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 2Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 3SQI Diagnostics Inc. Announces Adjournment of Meeting 2PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 2PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 3PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 4
... SAN DIEGO, March 25 ADVENTRX Pharmaceuticals, Inc. (NYSE ... for the fourth quarter and year ended December 31, ... we advanced a new business model focused on lower-risk ... our new lead programs, but given the difficult economic ...
... RICHMOND, Va., March 25 Insmed Inc. (Nasdaq: ... today announced that on Monday, March 23, 2009, NASDAQ issued ... a minimum $1 closing bid price and those rules requiring ... The suspension will remain in effect through Friday, July 17, ...
... - Oncolytics Biotech Inc. ("Oncolytics") (TSX:ONC, NASDAQ: ... enrolment in its U.K. clinical trial to evaluate ... in combination with gemcitabine (Gemzar(R)) in patients with ... The principal investigators are Dr. Johann de Bono ...
Cached Biology Technology:ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 2ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 3ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 4ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 5ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 6ADVENTRX Pharmaceuticals, Inc. Reports Fourth Quarter and Full Year 2008 Financial Results 7Insmed Announces That NASDAQ Further Extends Temporary Suspension of Minimum Bid Closing Price Rule 2Oncolytics Biotech(R) Inc. Completes Enrolment in Combination REOLYSIN(R)/Gemcitabine Trial 2Oncolytics Biotech(R) Inc. Completes Enrolment in Combination REOLYSIN(R)/Gemcitabine Trial 3
Request Info...
... 2 , Maintenance 112 days/each ... , Immunizations/Boost injections x5 /each ... /each , Production bleed (25 ml ... Bleed ~ 100 ml blood (~50 ml serum) x1 ...
FluoSpheres® biotin-labeled microspheres, 1.0 µm, yellow-green fluorescent (505/515) *1% solids*...
chk 1 kinase...
Biology Products: