Navigation Links
Better sex in return for good gifts
Date:10/24/2013

Culinary gifts

The male's nuptial gift consists of something deliciously edible, such as a fly, which he wraps up nicely in white silk prior to offering it to the female. He can then transfer sperm while she is eating the gift. If he remembers to bring a gift, he is allowed to provide her with more sperm than if he forgot, and the duration of the copulation is longer.

Sperm 'receptacle'

When a male has mated with a female spider, the sperm is stored in a special organ from which it can be released when the female has eggs to be fertilised. The researchers discovered that the female stores more sperm in this organ if the male has brought a gift, and he is therefore more likely to be the father of her offspring. It can thus be demonstrated that the female is capable of regulating how much sperm she stores, enabling her to favour males that provide her with culinary gifts.

Gifts reveal resourceful males

The female presumably prefers sperm from the gift bearer because it shows that he is resourceful and good at hunting and catching food. If these are good hereditary traits, the female can transfer the qualities to her offspring by favouring the male. The female spider thus selects sperm from the males she prefers, and has the benefit of passing on their good characteristics to her male offspring.

The study was made on the Pisaura mirabilis species (nursery web spider). Whether or not there is scientific justification of any advantages in providing human females with gifts was not mentioned in the study!


'/>"/>

Contact: Professor Trine Bilde
trine.bilde@biology.au.dk
(45) 60-20-27-02
Aarhus University
Source:Eurekalert  

Page: 1

Related biology news :

1. New methods for better purification of wastewater
2. Breakthroughs in Chikungunya research from A*STAR spell new hope for better treatment and protection
3. UNH researchers find African farmers need better climate change data to improve farming practices
4. Giant squids giant eyes: The better to see hungry whales with
5. Improved loblolly pines better for the environment, study finds
6. Fish larvae find the reef by orienting: The earlier the better
7. Intensive kidney dialysis indicates better survival rates than conventional dialysis
8. Modern hybrid corn makes better use of nitrogen, study shows
9. Bigger gorillas better at attracting mates and raising young
10. Better housing conditions for zebrafish could improve research results
11. Better plants for biofuels
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Better sex in return for good gifts
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
(Date:3/22/2016)... PROVO and SANDY, Utah ... Ontario (NSO), which operates the highest sample volume laboratory ... and Tute Genomics and UNIConnect, leaders in clinical sequencing ... announced the launch of a project to establish the ... panel. NSO has been contracted by ...
(Date:3/18/2016)... LONDON , March 18, 2016 ... Established Suppliers of Biometrics, ICT, Manned & Unmanned Vehicles, Physical ... & security companies in the border security market and ... and Europe has led ... your companies improved success. --> defence & ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... the release of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” ... and retention in this eBook by providing practical tips, tools, and strategies for ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
(Date:6/23/2016)... 2016  The Biodesign Challenge (BDC), a university competition ... harness living systems and biotechnology, announced its winning teams ... New York City . The ... projects at MoMA,s Celeste Bartos Theater during the daylong ... senior curator of architecture and design, and Suzanne ...
(Date:6/23/2016)... ... June 23, 2016 , ... In a new case report published ... how a patient who developed lymphedema after being treated for breast cancer benefitted from ... the paradigm for dealing with this debilitating, frequent side effect of cancer treatment. ...
Breaking Biology Technology: