Navigation Links
Reversal of the black widow myth
Date:5/6/2013

The Black Widow spider gets its name from the popular belief that female spiders eat their male suitors after mating. However, a new study has shown that the tendency to consume a potential mate is also true of some types of male spider. The study by Lenka Sentenska and Stano Pekar from Masaryk University in the Czech Republic finds that male spiders of the Micaria sociabilis species are more likely to eat the females than be eaten. The paper, published in Springer's journal Behavioral Ecology and Sociobiology, outlines possible reasons for this behavior.

In nature, female choice of mate is commonly seen as the overriding factor affecting male mating success. Sexual cannibalism is a form of female mate choice with low-quality mates more likely to be cannibalized. However, there is not as much evidence about how males may sometimes dictate the choice of partner. The researchers suggest that in the Micaria sociabilis species, reverse cannibalism seen may be a type of male mate choice.

The researchers collected male and female Micaria sociabilis spiders over a two-year period and studied their behavior by mixing males and females of the species at different time points. All spiders were well fed to discount cannibalism due to hunger. The authors observed what happened when they paired young adult male spiders with single female spiders either from the same generation (young female) or from another generation (old female). By pairing males with females of different size, age and mating status, the researchers hoped to be able to identify whether the reversed form of sexual cannibalism was an adaptive mechanism for male mate choice.

Their study found that cannibalism took place early after the first contact and before any mating took place. The researchers also observed that reverse cannibalism differed significantly, depending on what month it was most of the incidences were in July. Males from the summer ge
'/>"/>

Contact: Sophia Grein
sophia.grein@springer.com
49-622-148-78414
Springer
Source:Eurekalert

Page: 1 2

Related biology news :

1. Black carbon flowing from soil to oceans
2. Autism in black and white: NIH grant helps scientist study disorder in African Americans
3. Astronomer gets grant to better measure mysterious black holes
4. Black silicon can take efficiency of solar cells to new levels
5. Clamorous city blackbirds
6. Biologists unlock black box to underground world
7. Strength training improves vascular function in young black men
8. Black piranha, megapiranha have most powerful bites of fish living or extinct, finds GW researcher
9. The dark side of kerosene lamps: High black-carbon emissions
10. Study IDs kerosene lamps as big source of black carbon
11. Le Rouge et le Noir: Where the black dahlia gets its color
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/31/2014)... at the University of Warwick have discovered that ,good, ... , The substance, methylglyoxal - MG, was found to ... bad cholesterol from the body. , Low levels ... heart disease, with increased levels of MG being common ... problems. , Supported by funding from the British ...
(Date:8/31/2014)... provides a fast and accurate tool to diagnose ... The newly developed test (TAM-TB assay) is the ... in children. The test features excellent specificity, a ... speed of a blood test. The promising findings ... tuberculosis in children, particularly in tuberculosis-endemic regions. , ...
(Date:8/31/2014)... the highly infectious bacteria C. diff , that ... by a team at the University of Leicester. , ... that it is possible to identify the unique ,smell, ... rapid diagnosis of the condition., What is more, the ... different strains of the disease simply from their smell ...
Breaking Biology News(10 mins):Sugar substance 'kills' good HDL cholesterol, new research finds 2New tuberculosis blood test in children is reliable and highly specific 2Scientists develop 'electronic nose' for rapid detection of C. diff infection 2
... the Gladstone Institutes and the Stanford University School of ... toxic buildup of a protein found in nerve cells. ... treating a variety of neurodegenerative conditions, including amyotrophic lateral ... which there is no cure. The Gladstone ...
... The ability of embryonic stem cells to differentiate into ... and maintained by a complex series of chemical interactions, ... process could prove useful for stem cell-based therapies down ... Carnegie,s Yixian Zheng zeroes in on the process by ...
... or mating or to capture bigger prey, but a University ... crab has a more self-serving social agenda: to kick another ... home., All hermit crabs appropriate abandoned snail shells for their ... crabs popular terrarium pets are the only ones ...
Cached Biology News:Gladstone, Stanford scientists block toxic protein that plays key role in Lou Gehrig's disease 2Gladstone, Stanford scientists block toxic protein that plays key role in Lou Gehrig's disease 3Solving stem cell mysteries 2Hermit crabs socialize to evict their neighbors 2Hermit crabs socialize to evict their neighbors 3
(Date:8/31/2014)... PARSIPPANY, N.J. , Aug. 31, 2014 ... New Drug Discovery program in Anti-Infective research when two ... the coveted Qualified Infectious Disease Product (QIDP) status from ... granted to drugs which act against pathogens which have ... and are identified by Centre for Disease Control (a ...
(Date:8/31/2014)... Available spectra is similar for all L-series ... of a wide range of plants. The spectra ... patented and pending wide spectrum technology. The single ... applications in contrast to growth spectra made from ... a large variety of differently sized and shaped ...
(Date:8/31/2014)... 2014 2014 Market Research ... professional and in-depth research report on the ... information, including Polyacrylamide definition, classification, application, and ... overview. This research covers the international market ... global industry analysis covering macroeconomic environment & ...
(Date:8/31/2014)... 2014 This is a professional ... the Epoxy Hardener industry in Global and ... the industry, including definitions, applications and industry chain ... analysis are provided with a focus on history, ... A comparison between the international and Chinese situation ...
Breaking Biology Technology:U.S. FDA Grants QIDP Status for Wockhardt Anti-Infective Drug Discovery Program 2U.S. FDA Grants QIDP Status for Wockhardt Anti-Infective Drug Discovery Program 3International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 2International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 3Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 3
... Oct. 30 Prometheus Laboratories Inc., a,specialty ... U.S.,Patent and Trademark Office (USPTO) has issued ... Thiopurine Metabolites, a,diagnostic test that enables physicians ... and maintain desired therapeutic levels. The USPTO ...
... oncologist, discusses his breakthrough robotic surgery techniques, following an OR Live ... sexual function and continence. To date, Dr. Samadi has performed over ... his patients. , ... New York, NY (PRWEB) October ...
... Methylated DNA Quantification Kit significantly,simplifies the study of Global Methylation ... ... current methods, ST. LOUIS, Oct. ... Quantification Kit,(MDQ1) for epigenetic research http://www.sigma-aldrich.com/mdq1 . The,Methylated DNA ...
Cached Biology Technology:Prometheus Strengthens Intellectual Property Portfolio with Newly Issued Patents for Thiopurine Metabolite Testing 2Prominent Urologist Dr. David B. Samadi Presents Breakthrough Robotic Surgery Techniques on OR Live Webcast 2Prominent Urologist Dr. David B. Samadi Presents Breakthrough Robotic Surgery Techniques on OR Live Webcast 3Prominent Urologist Dr. David B. Samadi Presents Breakthrough Robotic Surgery Techniques on OR Live Webcast 4Sigma-Aldrich Introduces Methylated DNA Quantification Technology for Epigenetic Research 2Sigma-Aldrich Introduces Methylated DNA Quantification Technology for Epigenetic Research 3
... mitochondrial transmembrane potential is one ... that occur following induction of ... Kit utilizes a lipophilic cation, ... mitochondrial activity marker. MitoLight partitions ...
Kit Components: Anti-Acetylated Histone H3 Salmon Sperm DNA/Protein A Agarose All necessary buffers. ...
Sf21 Insect Cells (Frozen) in Max-XP Medium...
... ChipWriter Pro system, 220-240 V, uses floating ... oligonucleotides, carbohydrates, lipids, and other biomolecules onto ... This system can generate high-density arrays with ... or greater than 57,000 spots per membrane ...
Biology Products: