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:4/23/2014)... most in their mid-thirties and forties, face a ... within two decades. "Mutant" protein clusters, long blamed ... been the primary focus of therapies in development ... from Prof. Gerardo Lederkremer and Dr. Julia Leitman ... and Immunology, in collaboration with Prof. Ulrich Hartl ...
(Date:4/23/2014)... NY. (Apr. 23 2014) A team ... stem cells (hNSCs) into the brains of nonhuman ... 22 and 24 months found that the hNSCs ... did not cause tumors. , The study will ... Cell Transplantation but is currently freely available ...
(Date:4/23/2014)... group decision increases with the abundance of brains involved ... variety of factors as often happens in life ... groups actually tend to make more accurate decisions while ... pieces of information. , The findings present a significant ... the "wisdom of crowds," wherein individual observations even ...
Breaking Biology News(10 mins):On the defensive 2On the defensive 3Study finds long-term survival of human neural stem cells transplanted into primate brain 2Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3
... new study describes how bacteria use a previously unknown means ... have modified a common "housekeeping" enzyme in a way that ... The study appears in the Proceedings of the ... in chemical warfare with one another, and many antibiotics used ...
... A 12-week treatment of the fermented soy germ-based ... LDL cholesterol and improved vascular stiffness, all factors that ... first-of-its-kind peer-reviewed study reported in a poster at the ... study is the first to provide evidence that a ...
... by a University of Cincinnati undergraduate student and two team ... found to work in continuously recording the habits of snakes. ... Archival Tags (LATs) on snakes, since the LAT devices were ... to LATs, ability to measure temperature and pressure measuring ...
Cached Biology News:Team discovers how bacteria resist a 'Trojan horse' antibiotic 2Soy-based S-equol supplement reduces metabolic syndrome risk factors 2Soy-based S-equol supplement reduces metabolic syndrome risk factors 3UC research: Tracking Lake Erie water snake in fight against invasive fish 2UC research: Tracking Lake Erie water snake in fight against invasive fish 3
(Date:1/15/2014)... 15, 2014 Freeslate, Inc ., ... announced that Lupin Limited, one of India’s top five ... Protégé PharmD System for high throughput solid form ... focused on a wide range of quality, affordable generic ...
(Date:1/14/2014)... 2014 Carahsoft and CDS Federal Services ... 2014 at 2pm EST (11am PST), “Natural Language Processing: ... on how technology can turn raw, heterogeneous data into ... agencies. The online webinar will last approximately one hour. ...
(Date:1/14/2014)... 2014 EquitiesIQ, a leading informational research ... Alliqua is an emerging biomedical company acquiring, developing, manufacturing, ... market. , Free report download: http://equitiesiq.com/reports/alliqua/ , ... management team and Board, which launched the company’s new ...
(Date:1/14/2014)... In recent years, growing suspicion about the pharmaceutical ... and promotion has led to unprecedented levels of public ... about the insidious impact of commercialization of research, has ... the world’s biggest pharmas for illegal marketing activities, allegations ...
Breaking Biology Technology:Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... A team of Spanish scientists from a variety of ... the peridunal lagoons in the Doana National Park. Results ... regressing, largely due to the extraction of underground water ... effects of the ecosystem itself are further aggravating the ...
... Fibrocell Science, Inc. (OTCBB: FCSC) announced today that the ... Gene Therapies Advisory Committee reviewed azfibrocel-T, an autologous cell ... severe nasolabial fold wrinkles in adults. The committee voted ... on azfibrocel-T demonstrated efficacy, and 6 yes to 8 ...
... ( www.booshoot.com ) today announced that its ... of Martha Stewart "Dreamers Into Doers" program - an ... passions into a successful for-profit or non-profit career. ... in the for-profit category for her innovative and groundbreaking ...
Cached Biology Technology:Huelva is swallowing up coastal lagoons in Doñana 2Fibrocell Science, Inc. Reports Outcome of FDA Advisory Committee Meeting on Azfibrocel-T for Wrinkles 2Booshoot Founder & CEO Jackie Heinricher Honored as Visionary Entrepreneur by Martha Stewart 2