Navigation Links
Crafty Australian crayfish cheat
Date:2/26/2009

o direct their claws to the device and they'd bite.' The team found that, for a given claw size, males had huge variation in claw strength compared with females. This makes it hard for males to size each other up using claw size alone, which allows males to cheat when it comes to advertising their strength.

To understand just how serious the cheating was, muscle physiologist Rob James from Coventry University, UK, measured how much force crayfish muscles produce. He found that the muscles of female crayfish are actually more powerful than those of males. 'So males are not only cheating by creating large chelae with little muscle inside, but the muscle they do put in there is actually weaker,' Wilson concludes.

But these findings still didn't explain how males get away with cheating. Wilson wondered if there might be a disadvantage to growing large claws if growing intimidating weapons is costly, this would ensure that males' unwieldy claws are actually a reliable signal of their prowess. To test whether large claws might be a handicap when it comes to escaping danger, Wilson and Bywater measured how quickly crayfish sped off when startled. Sure enough, while females' swimming performance was unaffected, 'the large claws of the cheating males reduced their swimming speed,' Wilson says. This suggests a potentially serious fitness cost to growing large claws; males encumbered by big claws may end up as a predator's lunch.

According to Wilson, the importance of dishonesty in weapon signalling is underappreciated, and may play a larger role than previously suspected. The next step, he says, is to 'find out how frequently cheating occurs in nature.'


'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-012-234-25525
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related biology news :

1. Australian frog species chooses not to put eggs in 1 basket
2. Oldest Australian crayfish fossils provide missing evolutionary link
3. Fertilizer research center an Australian first
4. Australian researchers develop treatment to treat obesity
5. Invasive Australian jellyfish sighted in Gulf of Mexico in summer 2007
6. Inside the brain of a crayfish
7. Some cheaters can keep it in their genes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... announced Sophie Martin of the University of Lausanne, Switzerland, ... The award acknowledges her work to understand the molecular ... cell. , Martin has been working for the past ... way in which the spatial organization of cells contributes ... 11 years, she has been using fission yeast, which ...
(Date:4/23/2014)... new study by a University of Exeter researcher has ... of wild camels thriving in Australia,s remote outback have ... scale. , Sarah Crowley, of the Environment and Sustainability ... the history of the camel in Australia, from their ... to their current status as unwelcome "invader." , The ...
(Date:4/23/2014)... a technique used to read quickly. It involves ... non-essential words and/ or sentences. Similarly to humans, ... quickly "read" genetic information. Genes that need to ... smaller the encoding message, the easier it will ... Instituto Gulbenkian de Cincia (IGC, Portugal) and Centre ...
Breaking Biology News(10 mins):EMBO Gold Medal 2014 awarded to Sophie Martin 2How Australia got the hump with 1 million feral camels 2How Australia got the hump with 1 million feral camels 3Cell division speed influences gene architecture 2
... from North Carolina State University, the University of Washington ... most diverse collections of prehistoric non-native animal remains in ... find contributes to our understanding of culture in the ... may have been more important than previously thought. ...
... The Saint Louis Zoo,s Ron Goellner Center for ... on Nov. 30, 2011, that Ozark hellbenders have been ... subspecies of hellbender. This decade-long collaboration has yielded ... Nov. 15, and currently there are approximately 120 additional ...
... COPENHAGEN, DENMARK/ROCKVILLE, MD, USA Statens Serum Institut and Aeras ... trial of a new candidate TB vaccine designed to protect ... The trial is being conducted by the South African ... in the Western Cape province of South Africa. Dr. Hassan ...
Cached Biology News:Archaeologists find new evidence of animals being introduced to prehistoric Caribbean 2World's first captive breeding of Ozark hellbenders at Saint Louis Zoo 2World's first captive breeding of Ozark hellbenders at Saint Louis Zoo 3Vaccine targeting latent TB enters clinical testing 2
(Date:1/15/2014)... 2014 AudioNotch is the internet's leading ... the treatment of tinnitus. Patients listen to sound therapy ... a period of weeks to months, their tinnitus volume decreases. ... forms: Notched Music and Notched White Noise. Now, AudioNotch is ...
(Date:1/14/2014)... January 14, 2014 Date: Friday, April 11, ... Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... organization solely dedicated to finding a cure for hepatitis B ... will host its annual Crystal Ball on Friday, April 11 ...
(Date:1/14/2014)... 2014 Histogen, Inc., a regenerative medicine ... grown under simulated embryonic conditions, today announced that they ... Medical, Inc. for physician-dispensed aesthetic products containing Histogen’s proprietary ... agreement is an amendment to the existing license between ...
(Date:1/14/2014)... BURLINGAME, Calif. , Jan. 14, 2014 As pet owners ... no doubt many of them wrote: "Take better care of my ... and even designer clothes and top-brand carrying cases to take the ... Pet parents might also feel compelled to buy some pricey toys ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2
... a regulatory framework to guide the approval of the ... providing more affordable treatment for millions of Americans suffering ... chairman and CEO of Medco Health Solutions, Inc. (NYSE: ... and innovation over a period of many years has ...
... CASTLE, Del., March 12 -- Arkion(R) Life Sciences has ... AV-1011 Liquid Rice Seed Treatment in Louisiana and Missouri ... The EPA approval means that rice growers in these ... grackles. The new bird repellent effectively stops birds ...
... States, long the beneficiary of talented immigrants, must act ... pursue expanding opportunities in their home countries, according to ... Science and Technology .In A Reverse Brain Drain ... Harvard Law School, writes that immigrant scientists and engineers, ...
Cached Biology Technology:Biogenerics Legislation Provides Critical Pathway to Affordable Access for Patients with Chronic and Complex Conditions 2Biogenerics Legislation Provides Critical Pathway to Affordable Access for Patients with Chronic and Complex Conditions 3AV-1011 Bird Repellent to Protect Rice Seed Approved for Use in Louisiana and Missouri 2U.S. Risks Losing Highly Skilled Immigrants 2U.S. Risks Losing Highly Skilled Immigrants 3
...
... provides a familiar interface for data ... warehousing. The transition from paper to ... LABTrack contains an integrated LIMS, ... rules mechanism. These functions allow LABTrack ...
... Science Major Science MS 300V (Cat. No. ... designed to meet most electrophoresis needs in ... Major Science MS 300V power supply ... instruments used in electrophoresis. 4 pairs of ...
... Programmable Power Supply are high-performance, easy ... virtually any application from high voltage ... is unique in offering both graphic ... Programmable Power Supply is completely programmable ...
Biology Products: