Navigation Links
Marine snails get a metabolism boost
Date:5/3/2011

Durham, NC 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
'/>"/>

Contact: Robin Ann Smith
rsmith@nescent.org
919-668-4544
National Evolutionary Synthesis Center (NESCent)
Source:Eurekalert

Page: 1 2

Related biology news :

1. Pew announces 2011 recipients of distinguished marine conservation fellowship
2. Seafloor recovery from fishing gear impacts in Stellwagen Bank Marine Sanctuary slow, unstable
3. The ultimate camo: Team to mimic camouflage skill of marine animals in high-tech materials
4. Scotlands first marine reserve already producing benefits
5. Marine organisms with eternal life can solve the riddle of aging
6. VIMS study: Propeller turbulence may affect marine food webs
7. Studies of marine animals aim to help prevent rejection of transplanted organs
8. Death -- not just life -- important link in marine ecosystems
9. Human impacts on the marine ecosystems of Antarctica
10. New device uses submarine technology to diagnose stroke quickly
11. Algae, bacteria hogged oxygen after ancient mass extinction, slowed marine life recovery
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... available in German . ... that uses the refraction of X-rays through a specimen ... with this method are often of much higher quality ... team of Prof. Franz Pfeiffer are particularly interested in ... including X-ray phase-contrast imaging. One main goal is ...
(Date:7/11/2014)... at the National Institute of Standards and Technology ... work more effectively, they often prove that necessity ... the case recently for M. Lorna De Leoz ... growing specialization of glycomics. Glycomics is the study ... that are attached to proteins and lipids and ...
(Date:7/11/2014)... 2014, Shenzhen, China Researchers from Salk Institute for ... first time evaluated the safety and reliability of ... developed a new method, TALEN-HDAdV, which could significantly ... cell (hiPSC). This study published online in ... foundation for stem cell-based gene therapy. , The ...
Breaking Biology News(10 mins):New simple setup for X-ray phase contrast 2A new genome editing method brings the possibility of gene therapies closer to reality 2
... Health (NIMH), part of the National Institutes of Health, ... social behavior in humans--one of the most important but ... reported in Nature Neuroscience, published online on July 10, ... volunteers to those with a genetic abnormality, Williams Syndrome, ...
... Academy of Sciences (CAS) and the Danish Committee of ... release of pig genomic sequences. The released sequence data ... different domestic pig breeds from Europe and China. The ... genome sequencing effort, the Sino-Danish Pig Genome Project, started ...
... truckers and college students pulling all-nighters, appears to do ... is one of several in a new study that ... the modulation of sleep, wake, and arousal states. , ... colleagues at The Neurosciences Institute in San Diego. , ...
Cached Biology News:Scientists uncover new clues about brain function in human behavior 2Scientists uncover new clues about brain function in human behavior 3‘Blue Brain?project explores thought at molecular level 2
(Date:7/10/2014)... 2014 On July 9 Prime ... presented Russia,s first national "Industry" ... Company is developing a unique project called MabNext ... a number of innovative drugs based on monoclonal antibodies ... took place at the International Exhibition "Innoprom 2014" in ...
(Date:7/10/2014)... July 10, 2014 Research and Markets ... the "International Photonic Integrated Circuit (Monolithic Integration, ... 2019" report to their offering. ... concept of photonic integration traces its roots in ... promise of photonic integration went unexplored and unfulfilled ...
(Date:7/10/2014)... fight against terrorism with the creation of a sensor ... use of light and special glass fibres. , Published ... , the researchers describe a novel optical fibre sensor ... 6.3 ppm (parts per million). It requires an analysis ... detection has involved looking for metals that encase them ...
(Date:7/10/2014)... extremely challenging because there are many genetic variants that ... Now investigators reporting in the July 3rd issue of ... describe a strategy that may help reveal how such ... environmental exposures to affect the development of the nervous ... predispose individuals to schizophrenia. , The work takes ...
Breaking Biology Technology:Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2Detecting trace amounts of explosives with light 2New strategy could uncover genes at the root of psychiatric illnesses 2
... Robotic cars attracted attention last decade with a 100-mile driverless ... put up by the U.S. government. The past ... microrobots, miniaturized mobile machines designed to perform specific tasks. And ... some think the time has come for a microrobotics challenge. ...
... CASTRES, France , July 2, 2010 Olivier ... Pierre Fabre,Group starting September 1, 2010 . , ... Until now, Olivier Bohuon , 51, ... such, he ran the,group,s entire pharmaceutical activities from Chicago ( $22 ...
... ... progenitors into specific T cell lineages to the activity of a single gene encoding a ... for the development of blood cells lineages. , ... (PRWeb UK) July 1, 2010 -- A research team in Japan has ...
Cached Biology Technology:Thermal-powered, insect-like robot crawls into microrobot contenders' ring 2Thermal-powered, insect-like robot crawls into microrobot contenders' ring 3Olivier Bohuon Joins Pierre Fabre 2The Last Checkpoint to T Cell Fate 2