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:3/30/2015)... and Markets ( http://www.researchandmarkets.com/research/lc9bnl/global_gesture ) has announced ... in Automotive Sector 2014-2018" report to their offering. ... market in Automotive Sector to grow at a CAGR ... recognition is the ability of a device to identify ... recognition technology can be 2D-based or 3D-based. It uses ...
(Date:3/24/2015)... Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ) has announced the addition of ... report to their offering. This report analyzes the ... the following Segments: Face Biometrics, and Voice Biometrics. The report provides ... Japan , Europe , ... Africa , and Latin America ...
(Date:3/23/2015)... March 23, 2015 SoundView Technology Group issues a ... NXTD ) Wocket smart wallet. SoundView was one of the ... their experience with the Wocket in multiple scenarios and outlets. ... Foods and other retailers, making both debit and credit card ... also says, "If the company meets their plans in 2015, ...
Breaking Biology News(10 mins):Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 3Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 4
... Research Institute have identified specific molecules in the brain ... brain stem cells, which, when activated, can transform into ... findings are published online this week in the Proceedings ... An earlier paper (published in the May issue ...
... of niacin (vitamin B3) in the liver, which should provide ... HDL-cholesterol levels in the blood and thus lower the risk ... levels, the mechanism of how it works has been mysterious, ... production. Recent work had uncovered that a component of ATP ...
... America (ESA) will hold its 93rd Annual Meeting Aug. ... now open to the press. The meeting will include ... the theme, "Enhancing ecological thought by linking research and ... open the meeting on Sunday, Aug. 3 with his ...
Cached Biology News: Brain stem cells can be awakened, say Schepens scientists 2Ecological Society of America announces its 93rd Annual Meeting 2Ecological Society of America announces its 93rd Annual Meeting 3
(Date:4/30/2015)...  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), a leading ... today announced that it will release first quarter financial ... the close of the U.S. financial markets. The Company ... May 7, 2015 at 4:30 p.m. Eastern / 1:30 ... developments. For both "listen-only" participants and those ...
(Date:4/30/2015)... (PRWEB) April 30, 2015 Available ... at http://www.lespausa.com , Phytomer’s DOUCEUR INTEMPORELLE ... and reactive skin while battling the weakening threat ... restorative cream is formulated with star ingredient GLYCOSEA, ... biotechnology in a complex of soothing minerals and ...
(Date:4/29/2015)... According to a new market research ... & Non-Portable), Component (Accelerometer, Proximity Probe, & Others), ... Mining, & Others), & Geography - Global Forecast ... reach $1,453.76 Million by 2020, at a CAGR ... and 92 figures spread through 205 pages and ...
(Date:4/29/2015)... April 29, 2015 Cambrex Corporation (NYSE: CBM ... released on Friday, May 1, 2015 before the market opens. ... Company will host a conference call to discuss the financial ... , Friday, May 1, 2015 at 8:30 ... 1-888-468-2440 for U.S.1-719-325-2454 for International  Passcode:  7993632 Dial-in Replay: ...
Breaking Biology Technology:Asterias Biotherapeutics to Report First Quarter Results on May 7, 2015 2Asterias Biotherapeutics to Report First Quarter Results on May 7, 2015 3Phytomer introduces DOUCEUR INTEMPORELLE Restorative Shield Cream 2Phytomer introduces DOUCEUR INTEMPORELLE Restorative Shield Cream 3Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 2Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 3Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 4
... US Oncology, Inc ., the nation,s ... treatment and research network in the United States, ... quarter of fiscal 2010 on Thursday, Nov. 4. ... (Logo:   http://www.newscom.com/cgi-bin/prnh/20100517/DA06089LOGO ) A conference ...
... HONG KONG, Oct. 7 /PRNewswire-Asia-FirstCall/ -- China Cord ... CO ), the first and largest cord blood ... authorization of the stock repurchase program on September 15, ... for approximately US$1.6 million through October 6, 2010 at ...
... Dendreon Corporation (Nasdaq: DNDN ) today announced ... 3, 2010 at 4:30 p.m. ET to review third quarter ... be obtained as follows: Time: , 4:30 PM ... 2010Dial-in: , 1-866-730-5769 (domestic) or +1-857-350-1593 (international); conference ...
Cached Biology Technology:US Oncology to Report 2010 Third Quarter Operating Results 2China Cord Blood Corporation Updates Status Regarding Share Repurchase Program 2Dendreon to Host Conference Call on November 3rd to Announce Third Quarter Financial Results 2
Mouse monoclonal [6G11] to Cytohesin 1 + 2 ( Abpromise for all tested applications)....
HP 1 alpha Immunogen: Synthetic peptide between amino acids 1-100 of the human HP 1 alpha protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
... KLH-conjugated, synthetic peptide corresponding to ... mouse p19ARF. The epitope ... 62-75. Clone 5-C3-1. Quality ... immunoblot. Stability ...
Request Info...
Biology Products: