Navigation Links
Paying for sex and 'playing dead' - the deceitful gift-giving spider
Date:11/13/2011

Male nursery web spiders (Pisaura mirabilis) prepare silk-wrapped gifts to give to potential mates. Most gifts contain insects, but some gifts are inedible plant seeds or empty exoskeletons left after the prey has already been eaten (presumably by the male himself!). Males will also 'play dead' if a female moves away and then attempt to re-establish mating. New research published in BioMed Central's open access journal BMC Evolutionary Biology examines the reproductive success of deceitful males and shows that females are not impressed by worthless gifts.

Male spiders were provided with either a potential gift of a fly, or a worthless item, such as a cotton wool ball, a dry flower head, a prey leftover (previously eaten housefly), or no gift at all. All the gifts were approximately the same size, so the females would not be able to tell what the gift was without unwrapping it. Males that offered any gift were more likely to successfully mate than males without. However the length of time the females allowed males with worthless gifts to spend transferring sperm was shorter than those with edible gifts (and even shorter for those with no gift at all!).

It appears that both male and female spiders are apparently able to assess the value of the gift and modify their behavior accordingly. Not only did the female spiders end mating sooner with an inedible gift, but male death feigning (thanatosis), which is triggered by the female attempting to end mating and run away with the gift, occurred in half of the matings involving an edible gift, but only once with a worthless gift. Similarly males and females were sometimes seen fighting over edible gifts, but never for a worthless gift.

Maria Albo who led the research explained, "The evolution of male deceit involves a complex equation of costs and benefits. It costs the males to find and wrap a gift, but these costs can be reduced if the male does not have to first catch h
'/>"/>

Contact: Dr Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Is governmental investment in industrial R&D paying off?
2. Golf course: Playing fields, wildlife sanctuaries or both
3. Playing it safe
4. Playing sport up to the end of pregnancy is healthy for the baby and the mother
5. Playing Pong with the blink of an eye
6. Rigorous study confirms video game playing increases food intake in teens
7. Deadly rugby virus spreads in sumo wrestlers
8. Brown scientist finds coastal dead zones may benefit some species
9. 15-state Southern obesity summit to focus on deadly epidemic
10. Battling bacteria in the blood: Researchers tackle deadly infections
11. Study: Excessive use of antiviral drugs could aid deadly flu
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Paying for sex and 'playing dead' - the deceitful gift-giving spider
(Date:8/5/2015)... , August 5, 2015 ... & Access Management Market by Software, Services, Vertical (BFSI, Airport, ... & Geography - Global Forecast to 2020", published by ... Management Market globally into various segments. The global PIAM ... 2014 to $546.2 Million by 2019, at a CAGR ...
(Date:8/5/2015)... MOUNTAIN VIEW, Calif. , Aug. 5, 2015 /PRNewswire/ ... it exhibits continuous growth in applications, penetration into newer ... year after year. The global biosensors space has seen ... having exited the market so far. (Photo ... from Frost & Sullivan, Analysis of the Global ...
(Date:8/4/2015)... AMRI ) today reported financial and operating results for the second ... Second quarter contract revenue of $ 85.2 million, ... margins of 26 % , Second quarter ... from royalties in the current quarter , Operating ... pleased to present another strong financial quarter, with all our divisions ...
Breaking Biology News(10 mins):Physical Identity and Access Management Market Worth $546.2 Million by 2019 2Physical Identity and Access Management Market Worth $546.2 Million by 2019 3Physical Identity and Access Management Market Worth $546.2 Million by 2019 4Innovative Biosensors Incite Use in Non-Traditional Applications 2Innovative Biosensors Incite Use in Non-Traditional Applications 3Innovative Biosensors Incite Use in Non-Traditional Applications 4AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24
... In a world full of hungry predators, prey animals ... face a particular challenge when it comes to defending themselves. ... interesting is that they can,t run away," says John Orrock, ... run, you can,t necessarily hide, so what can you do? ...
... sutures and other medical devices shows promise for continuous ... are reporting in a new study. Use of the ... the need for weeks of costly hospital stays now ... ACS Chemical Neuroscience . Shih-Jung Liu and ...
... studies by Dr. Zhihong Chen and colleagues from ... improve aberrant Akt signaling, decrease heme oxygenase-1 expression ... the apoptosis of hippocampal neurons in diabetic rats, ... reported that the growth hormone/insulin-like growth factor 1 ...
Cached Biology News:Eavesdropping plants prepare to be attacked 2
(Date:8/27/2015)... ... August 27, 2015 , ... ... presented new data on the relationship of genetics and hypertension at the ... Heart Disease in Vancouver, British Columbia, Canada. The event, which boasts an extensive ...
(Date:8/26/2015)... 26, 2015  Roka Bioscience, Inc. (NASDAQ: ROKA ... testing solutions for the detection of foodborne pathogens, today ... the Sidoti & Company Emerging Growth Conference on September ... at the New York Marriott Marquis. ... through the investor relations section of Roka Bioscience,s website ...
(Date:8/26/2015)... , Aug. 26, 2015  Platform therapeutic ... it has received a $1.5M Phase II SBIR ... to further develop its therapeutic agent to reduce ... need in end stage renal disease (ESRD) patients ... National Institute of Diabetes and Digestive and Kidney ...
(Date:8/26/2015)... -- China Cord Blood Corporation (NYSE: CO ) ... of cord blood collection, laboratory testing, hematopoietic stem cell ... the Company has been informed that Magnum Opus 2 ... Mr. Yuen Kam, chairman of the board of directors ... "Shares") of  Excellent China Healthcare Investment Limited ("KKR SPV") ...
Breaking Biology Technology:Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 2Proove Biosciences Presents Ground-Breaking Data on Genetics and Heart Disease at 20th World Congress on Heart Disease 3Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3
... radio frequency identification (RFID) becomes increasingly widespread - moving ... that previously used it for their own purposes to ... a highly fragmented industry with pockets of development virtually ... E-Business Consortium at the University of Wisconsin-Madison ...
... Services, Inc., a provider of electronic parts catalogs and ... increased revenues and record net income for the fiscal year ... were $13.7 million, a 2% increase from revenues of $13.4 ... million or $0.32 per diluted share, from operating income of ...
... -- Mayor Tom Barrett and Milwaukee officials on ... to provide a citywide wireless network accessible to all ... become the first fully wireless large city in America, ... according to the Barrett's office. , ,"This initiative constitutes ...
Cached Biology Technology:RFID technology is opportunity for Wisconsin companies 2RFID technology is opportunity for Wisconsin companies 3RFID technology is opportunity for Wisconsin companies 4RFID technology is opportunity for Wisconsin companies 5RFID technology is opportunity for Wisconsin companies 6RFID technology is opportunity for Wisconsin companies 7RFID technology is opportunity for Wisconsin companies 8Milwaukee announces citywide wireless initiative 2
... critical to the maintenance of appropriate ... as important and diverse as those ... and stress response, antigen presentation, modulation ... channels, cell cycle regulation, transcription, and ...
... critical to the maintenance of appropriate ... as important and diverse as those ... and stress response, antigen presentation, modulation ... channels, cell cycle regulation, transcription, and ...
... Automated Spot Picking,A modified digital scanner ... requires three of the five standard rack ... up to 4 micro well plates on ... manual selection of single spots by mouse-click ...
...
Biology Products: