Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Marine snails get a metabolism boost

04.05.2011
Most of us wouldn't consider slow-moving snails to be high-metabolism creatures. But at one point in the distant past, snail metabolism sped up, says a new study of marine snails in the journal Paleobiology.

"Many of the marine snails we recognize today — such as abalone, conchs, periwinkles and whelks — require more than twice as much energy to survive as their ancestors did," said co-author Seth Finnegan of the California Institute of Technology.

The findings come from a new analysis of snail fossils formed one to two hundred million years ago, during a period dubbed the Marine Mesozoic Revolution.

Estimating the metabolism of an animal that lived millions of years ago isn't easy. But body size gives us a clue, the authors said. In animals alive today, animals with bigger bodies tend to have higher basal metabolic rates, they explained.

"Bigger-bodied creatures simply require more calories to carry out basic functions," Finnegan said.

By assembling a database of several thousand species of living and extinct snails, the researchers were able to compile body size measurements from the snail fossil record stretching back more than 200 million years, and compare them to physiological data from different-sized snails living today.

The overall trend? Between 200 and 80 million years ago, the resting metabolic rate of tropical marine snails more than doubled, said co-author Jonathan Payne of Stanford University.

The driving force for this change was probably diet, the authors argue. Clues from fossilized shells suggest that prior to this time, most marine snails fed on plants and decaying organic matter. Then, over time, some snails evolved to feed on each other, Finnegan explained.

"To the best our ability to tell from their fossilized remains, almost none of the snails that lived prior to the Marine Mesozoic Revolution were predatory," Finnegan said. "Then the snails that really began to diversify during this period were dominated largely by predatory groups."

The evolutionary arms race between snail predators and their prey drove them to rev up their metabolic rates, Payne explained.

"As predators evolved to be faster and stronger, and prey evolved thicker, more reinforced shells to avoid being eaten, they had to use more and more energy to survive," he said.

The next step will be to see if the same trends can be found in other animals too, the authors added.

"Marine snails are one of the most diverse groups of animals out there, but we should see the same trend in other well-preserved animals too," said co-author Craig McClain of the National Evolutionary Synthesis Center in Durham, NC.

The team's findings appear in the May 2011 issue of Paleobiology.

Matthew Kosnik of Macquarie University, New South Wales, Australia was also an author on this study.

CITATION: Finnegan, S., C. McClain, et al. (2011). "Escargots through time: an energetic comparison of marine gastropod assemblages before and after the Mesozoic Marine Revolution." Paleobiology 37(2): 252-269. DOI: 10.1666/09066.1

The National Evolutionary Synthesis Center (NESCent) is a nonprofit science center dedicated to cross-disciplinary research in evolution. Funded by the National Science Foundation, NESCent is jointly operated by Duke University, The University of North Carolina at Chapel Hill, and North Carolina State University. For more information about research and training opportunities at NESCent, visit www.nescent.org.

Robin Ann Smith | EurekAlert!
Further information:
http://www.nescent.org

More articles from Life Sciences:

nachricht Designer cells: artificial enzyme can activate a gene switch
22.05.2018 | Universität Basel

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>