Navigation Links
The best both of worlds -- how to have sex and survive
Date:9/20/2007

Researchers have discovered that even the gruesome and brutal lifestyle of the Evarcha culicivora, a blood gorging jumping spider indigenous to East Africa, cant help but be tempted by that big is beautiful mantra no matter what the costs. A study recently published in Ethology found that despite the inherent risk of sexual cannibalism, virgin females were attracted to bigger males when losing their virginity before opting for the safer smaller male as a longer term mate choice.

It is quite common for male spiders to fall victim to female sexual partners once they have mated as the female is more often than not bigger than her mate. In the case of E. culicivora, the gender roles and the size ranges of both sexes are different from the norm and this is important in understanding the evolution of their mate choice behaviour. Large males are more cannibalistic towards smaller females than vice versa. Consequently, virgin females prefer larger males as mates, in spite of the increased risk of cannibalism, but once the females have mated they change tact and prefer smaller males. In contrast, males make the same choice regardless of whether they are virgins or not and prefer larger females as mates overall.

The research team based in New Zealand and Kenya used interesting techniques to ensure that their findings were based purely on size selection and not courtship behaviour. Dr Pollard explained like all salticids, E. culicivora has exceptional eyesight that is unrivalled by other animals of a similar size. Because E. culicivora can see so well, we could test what size mates virgin and non virgin males and females preferred by showing them different sized, dead conspecifics arranged in life-like postures. These motionless mounts were coated with a plastic adhesive and allowed us to test for decisions based only on the size of the potential mate and not its behaviour. To check whether the decisions made with static models related to actual mati
'/>"/>

Contact: Davina Quarterman
davina.quarterman@oxon.blackwellpublishing.com
01-865-476-307
Blackwell Publishing Ltd.
Source:Eurekalert

Page: 1 2

Related biology news :

1. Nano machine switches between biological and silicon worlds
2. Best of both worlds -- Targeting a single gene could inhibit bone decay and stimulate bone growth
3. Harmful Bacterium Commonly Found in Poultry May Survive Refrigeration and Frozen Storage Combined
4. Scientists reveal how disease bacterium survives inside immune system cell
5. Discoveries by UAB and Florida scientists may help transplanted organs survive longer
6. Bacteria can survive for weeks on hospital surfaces
7. Bacteria that cause tooth decay able to survive without important biochemical pathway
8. Tiny polyps gorge themselves to survive coral bleaching
9. Anthrax spores may survive water treatment
10. Heart has enough oxygen to survive hypothermia, CPR crucial
11. Life and death in the hippocampus: what young neurons need to survive
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... of the fish world, are the ideal animal in ... They,ve moved from the ocean into tens of thousands ... time changing their skeleton to adapt to the new ... of sticklebacks now have turned up one of the ... simple change in that gene,s regulation in a freshwater ...
(Date:9/17/2014)... From accessible and affordable health care to reproductive ... depend on the ability of people to identify ... openly and respectfully, and find the most defensible ... practices to support these societal conversations?, The Hastings ... of Bioethical Issues have teamed up to publish ...
(Date:9/17/2014)... started in 2000 as an EC-FP5 four-year project, delivering ... steady progress and successful participations in several EC projects, ... Observation Network project (EU BON), to increase the ... and to extend the general dissemination of the Fauna ... has applied its novel e-Publishing tools to prepare ...
Breaking Biology News(10 mins):Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 2Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 3Why bioethics literacy matters 2Why bioethics literacy matters 3Contributions on Fauna Europaea: Data papers as innovative model on expert involvement 2
... to find a DNA-based test to determine the sex ... sturgeon genome contains trematode genes that didn,t originally belong ... causes a sexually transmitted disease in humans. Genetics ... found the parasite and pathogen genes while analyzing DNA ...
... have developed a rapid, high-throughput screening method for prevention ... Munkongdee et al, "Rapid diagnosis of α-thalassemia by melting ... The Journal of Molecular Diagnostics . α-Thalassemia ... in the production of a component of hemoglobin. ...
... A flyover of Belize,s thick jungles has revolutionized archaeology ... by one of the most-studied ancient civilizations -- the ... NASA-funded research project in April 2009 that collected the ... days. Aboard a Cessna 337, LiDAR (Light Detection ...
Cached Biology News:Lake sturgeon have genes from parasite, signs of human STD 2Space technology revolutionizes archaeology, understanding of Maya 2Space technology revolutionizes archaeology, understanding of Maya 3
(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
... , High-level expression of difficult heterologous proteins ... has created variants of the Epicurian Coli ... of strains, which contain extra copies of the E. ... for a high-level,expression of proteins that are difficult to ...
... primary libraries with new plasmid library construction,kits , ... Barry,Neiditch Alan Greener John C. Bauer ... II,pcmv-script and pAD-GAL4-2.1 XR library ... into Epicurian Coli ,XL10-Gold ...
... , , , ,Over 40% of Stratagenes GeneConnection cDNA ... estimated to be full-length clones , Jason Goncalves ... GeneConnection discovery cDNA clone collection YY ... many ,different human tissues and has identified thousands of ...
Cached Biology Technology:Codon Bias-Adjusted BL21 Derivatives for Protein Expression 2Codon Bias-Adjusted BL21 Derivatives for Protein Expression 3Codon Bias-Adjusted BL21 Derivatives for Protein Expression 4Codon Bias-Adjusted BL21 Derivatives for Protein Expression 5Codon Bias-Adjusted BL21 Derivatives for Protein Expression 6Codon Bias-Adjusted BL21 Derivatives for Protein Expression 7Generate High-Quality, Directional Plasmid cDNA Libraries 2Generate High-Quality, Directional Plasmid cDNA Libraries 3Generate High-Quality, Directional Plasmid cDNA Libraries 4Generate High-Quality, Directional Plasmid cDNA Libraries 5Generate High-Quality, Directional Plasmid cDNA Libraries 6Generate High-Quality, Directional Plasmid cDNA Libraries 7The GeneZoo or the GeneJungle? 2The GeneZoo or the GeneJungle? 3The GeneZoo or the GeneJungle? 4The GeneZoo or the GeneJungle? 5The GeneZoo or the GeneJungle? 6The GeneZoo or the GeneJungle? 7The GeneZoo or the GeneJungle? 8The GeneZoo or the GeneJungle? 9The GeneZoo or the GeneJungle? 10
Compound(s) tested through a broad panel of 38 ligand binding and enzyme assays targeting the Central Nervous System. Used to determine selectivity and potential Neurological liabilities of compound...
... Clean-up Maxi Kit provides a fast and ... SDS, Triton X-100 and other detergents ... chromatography using Norgens patented protein resin as ... of processing 0.25 - 8 mg of ...
... Proteolytic degradation is critical to the ... and regulatory proteins as important and ... metabolism, heat shock and stress response, ... receptors and ion channels, cell cycle ...
... for the identification of potential biomarkers in urine, ... diseases. Due to the fact that urine can ... an attractive alternative to blood plasma as a ... Urine Protein Concentration Micro Kit provides a fast ...
Biology Products: