Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Success by Learning - Smallest Predator Recognizes Prey by its Shape

16.05.2008
The Etruscan shrew (Suncus etruscus) is one of the world's smallest mammals. It is about four centimetres long and weighs merely two grams.

Being a nocturnal animal, it hunts predominantly with its sense of touch. Professor Michael Brecht (Bernstein Center for Computional Neuroscience, Berlin) now reported on the particularities of its hunting behaviour at the international conference "Development and function of somatosensation and pain" at the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch, Germany.

"As quick as a flash, the Etruscan shrew scans its prey and adapts, when necessary, its hunting strategy," explained Brecht in his talk. "Thus, no prey escapes."

The smaller an animal is, the greater is its loss of warmth over its surface. To avoid starvation, the Etruscan shrew has to constantly compensate for this life-threatening energy loss. Thus, it consumes twice its weight every day and feeds on crickets, cockroaches, and spiders. Since the prey are nearly as big as their predator, the shrew has to attack fast and well directed.

... more about:
»Etruscan »attack »prey »shrew

Etruscan shrews hunt in the night and must rely on their sense of touch. With long whiskers at the snout, they can locate potential prey and recognize whom exactly they are facing. Afterwards, the shrews kill their prey using directed attacks. The researchers could observe that they track down crickets with a forceful bite in the back. To investigate whether the animals recognize their prey by its shape, they offered the Etruscan shrews a plastic cricket. Though the artificial animal neither moved nor smelled, the Etruscan shrews attacked the plastic prey up to 15 times. "The Etruscan shrews trust in their sense of touch and the tactile shape recognition in an extent we do not know from other animal species," reported Brecht at the MDC conference.

"Also, the animals can adjust quickly to new situations", Brecht pointed out. To examine this theory, the scientists exchanged the living crickets with a giant cockroach. This new animal differs clearly from the natural prey of the shrews. The back of the cockroach is protected by a heavy shield and is therefore saved from the normal attacks of the Etruscan shrews. However, the experiments showed that the shrews succeeded in adapting their natural hunting strategy to the new prey in very short time. Quickly, they realized that the belly is the cockroach's weak point. "The shrews are learning during the hunt and use the new knowledge right away," said Brecht. "Even the giant cockroach can not escape."

Barbara Bachtler
Press and Public Affairs
Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch
Robert-Rössle-Straße 10; 13125 Berlin; Germany
Phone: +49 (0) 30 94 06 - 38 96
Fax: +49 (0) 30 94 06 - 38 33
e-mail: presse@mdc-berlin.de

Barbara Bachtler | Max-Delbrück-Centrum
Further information:
http://www.mdc-berlin.de/en/news
http://www.activetouch.de/index.php?id=7
http://www.bccn-berlin.de/ResearchGroups/Brecht

Further reports about: Etruscan attack prey shrew

More articles from Life Sciences:

nachricht Researchers target protein that protects bacteria's DNA 'recipes'
21.08.2018 | University of Rochester

nachricht Protein interaction helps Yersinia cause disease
21.08.2018 | Schwedischer Forschungsrat - The Swedish Research Council

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.

The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Air pollution leads to cardiovascular diseases

21.08.2018 | Ecology, The Environment and Conservation

Researchers target protein that protects bacteria's DNA 'recipes'

21.08.2018 | Life Sciences

A paper battery powered by bacteria

21.08.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>