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:9/18/2014)... and the Quebec government have discovered microplastics (in ... of Fisheries and Aquatic Sciences . , The ... industrial cleansers, to which they are commonly added ... buoyancy, they may readily pass through sewage treatment ... the world,s oceans, but have only recently been ...
(Date:9/18/2014)... ability to acquire and creatively manipulate spoken language is ... the past 6 million years of human evolution to ... the best candidate gene we now have," says Wolfgang ... In his efforts to understand the molecular biological basis ... forward. The results of his latest study, undertaken in ...
(Date:9/18/2014)... 2014Many Americans across racial and ethnic groups describe ... on their day-to-day life, more so than other ... speech (57% of African-Americans, 49% of non-Hispanic whites, ... asked which disease or ailment is the worst ... among African-Americans followed by AIDS/HIV. Hispanics and ...
Breaking Biology News(10 mins):Microplastic pollution discovered in St. Lawrence River sediments 2Language evolution: Quicker on the uptake 2Language evolution: Quicker on the uptake 3Americans rate losing eyesight as having greatest impact on their lives 2Americans rate losing eyesight as having greatest impact on their lives 3
... A current controversy raging in evolutionary biology is ... many genes, each of relatively small effect, or just ... published in Molecular Ecology strongly supports the ... from the Department of Biology and the Redpath Museum, ...
... Robot squirrels from the University of California, Davis, ... a research project on the interaction between squirrels and ... how squirrels signal to snakes with heat and tail ... University and UC Davis aim to learn more about ...
... April 3, 2012 A team led by scientists ... prevent infection from widely differing strains of hepatitis C virus ... very high rate of mutation normally helps it to evade ... to sites on the viral envelope that seldom mutate. One ...
Cached Biology News:Robosquirrels versus rattlesnakes 2Robosquirrels versus rattlesnakes 3Scripps Research Institute scientists find promising vaccine targets on hepatitis C virus 2Scripps Research Institute scientists find promising vaccine targets on hepatitis C virus 3Scripps Research Institute scientists find promising vaccine targets on hepatitis C virus 4
(Date:9/18/2014)... MA (PRWEB) September 18, 2014 ... Molecule Sequencing (tSMS™) technology, announced today the closing ... of investment, led by Genomic Diagnostic Technologies, will ... and diagnostic applications. , Founded in March 2013 ... and Bioinformatics Analyst at Helicos BioSciences, SeqLL has ...
(Date:9/18/2014)... Artificial sweeteners, promoted as aids to weight loss and ... intolerance and metabolic disease; and they do it in ... of the gut microbiota the substantial population of ... of experiments in mice and humans, were published today ... Eran Elinav of the Weizmann Institute,s Immunology Department, who ...
(Date:9/18/2014)... The quest for the ultimate memory device for computing ... at The City College of New York led by ... exhibit both magnetic and ferroelectric properties. , Combining both ... can occur between them and for the devices that ... Combining these two properties in a single material, however, ...
(Date:9/18/2014)... September 18, 2014 September 24 marks ... MX. ASEA is the manufacturer of the world's first ... care product, RENU28. , The Mexico City event ... Duvan Botero, and ASEA Field Leader Shawn Catmull from ... PhD in Atomic/Medical Physics from the University of Utah ...
Breaking Biology Technology:SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2Gut bacteria, artificial sweeteners and glucose intolerance 2Gut bacteria, artificial sweeteners and glucose intolerance 3Oxides discovered by CCNY team could advance memory devices 2Announcing the ASEA Mexico Grand Opening Tour Beginning September 18th 2
... , Strategic Examination and Consolidation of Services Recommended ... 27 Little uniformity exists in the structure or functions of ... to Clinical Trials Offices: What,s New in Research Administration?, ... (AAHC). Emerging centralized clinical trial offices (CTOs) are among the ...
... , , ATLANTA, Aug. 27 ... million extension of its Series C financing which was originally completed in ... $5 million in Series C preferred stock received warrants for an additional ... have up to 30 days from the delivery of Phase III top-line ...
... , , , ... ATLANTA, Aug. 27 Airo, recognized maker of the ... Safe handset is available for delivery Q4 of 2009. Airo ... in potentially explosive environments like Petroleum, Chemicals, Fertilizer, Coal, Propane, ...
Cached Biology Technology:Clinical Trials Offices Changing Academic Health Center Research Infrastructure 2Alimera Sciences Closes $5 Million in Extended Series C Financing 2Airo Wireless Announces the Release of the Intrinsically Safe A25is Cell Phone/PDA 2
... Polynucleotide Kinase catalyzes the transfer ... to the 5-terminus of polynucleotides ... 5-hydroxyl group. The enzyme, purified ... be used to phosphorylate RNA, ...
... Freezers for IVF are designed for human ... ease of setup and operation, and convenience. ... are continuously displayed on the control panel. ... are printed by way of the thermal ...
... adamanteus venom Description: Phosphodiesterase I ... in studying nucleic acid structure ... hydrolyzes 5'-mononucleotides from 3'-hydroxy-terminated ribo-oligonucleotides ... I cleaves ADP-ribosylated proteins at ...
... Life Science Rotarods are used to assess the ... fatigue resistance on mice and rats using one ... user friendly; the animals are placed on textured ... onto the individual sensing platforms below, its test ...
Biology Products: