HOME >> BIOLOGY >> NEWS
Monogamy Has Its Rewards For Flies

Having sex with only one partner makes males nicer and females less defensive, at least in fruit flies. It seems the flies don't benefit from having a choice of mate. In fact, they do worse.

Male Drosophila melanogaster are promiscuous and compete for available females. To try to ensure that their sperm fertilises the female's eggs, males have evolved toxic seminal fluid that disables the sperm of other males that have mated with the same female, and carries hormones that make the female less sexually receptive, reducing the chance that she will mate again. These toxins and hormones are harmful to females, however, so they have evolved defences against them.

In short, sex in fruit flies is a running battle in which males have evolved to fertilise as many eggs as possible, while females have evolved to protect their own health. "They can antagonistically coevolve just like predator and prey," says William Rice of the University of California at Santa Cruz.

Rice and his student Brett Holland hoped to find out far fruit flies have gone in this arms race. Holland divided a laboratory population of flies into four subpopulations in which females lived in individual vials. In two of the subpopulations, each female shared a vial with three males, which competed in the usual way to fertilise her.

In the other two subpopulations, Holland forced the flies to be monogamous by putting only one male with each female. Under such conditions, males have nothing to gain by emphasising quantity over quality. "In this case, what's good for a female is good for her mate and vice versa. That should convert the arms race into a mutualistic interaction," says Rice.

After 34 generations, Holland measured the toxicity of the flies' seminal fluid by mating the males with females that were specially bred to be particularly sensitive to seminal fluid toxins. The females were 20 per cent less likely to die after a single mating with m
'"/>

Contact: Claire Bowles
claire.bowles@rbi.co.uk
44 171 331 2751
New Scientist
1-Jul-1998


Page: 1 2

Related biology news :

1. Monogamy appears to be unnatural in the natural world
2. Flies may taste bitter better, first map of insect tongue reveals
3. Flies offer clues to anesthesia-resistant memory
4. Scientists, Using Flies, Trace Genetic Links To Cancer
5. For Fruit Flies, Finding The Right Mate May Mean Offspring With A Longer Life Span, According To New Study
6. Two Modes Of Aging Discovered In Fruit Flies
7. Scientists Discover Two Modes Of Aging In Fruit Flies
8. UF Researchers Innovative Fence Helps Control Sand Flies
9. Drunken Fruit Flies Reveal Molecular Pathway Regulating Sensitivity To Alcohol
10. Fruit Flies May Shed Light On Cocaine Addiction
11. Two Parasitic Wasps Show Promise For Controlling Pest Flies

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Monogamy Has Its Rewards For Flies

(Date:10/28/2014)... of Health (NIH) announced awards to expand the ... National Center for Advancing Translational Sciences (ORDR-NCATS) collaborative ... the network, physician scientists at 22 consortia will ... clinical research and investigate new treatments for patients ... by $29 million in fiscal 2014 funding from ...
(Date:10/27/2014)... researchers have delivered a scientific one-two punch with a ... self-assemble via their sticky ends. , Collagen is the ... bone and the fibrous tissues that support cells and ... better synthetic collagen for tissue engineering and cosmetic and ... has been studying synthetic collagen for a decade, teasing ...
(Date:10/27/2014)... 27, 2014) — Recent breakthroughs may pave the ... infected by parasitic helminths. These flatworms, including tapeworms ... and blood flukes (schistosomes), infect more than 300 ... life years lost due to chronic illness and ... , professor of microbiology, immunology, and tropical medicine, ...
Breaking Biology News(10 mins):NIH's ORDR-NCATS RDCRN & NICHD awards U54 cooperative agreement for natural history study 2NIH's ORDR-NCATS RDCRN & NICHD awards U54 cooperative agreement for natural history study 3'Sticky' ends start synthetic collagen growth 2'Sticky' ends start synthetic collagen growth 3GW researcher adapting breakthrough technologies to combat parasitic worm infections 2
(Date:10/30/2014)... The severe flooding that devastated a wide swath of ... the bridges, roads and other infrastructure had been upgraded ... University of Colorado Denver. , "People need to understand ... PhD, associate professor of structural engineering at the CU ... author the study. "There is an assumption that a ...
(Date:10/27/2014)... Kalorama Information says that PCR is demonstrating ... the United States and is the ... said the FDA,s Emergency Use Authorization (EUA) to authorize the ... detection of the Ebola virus was an indication that ... the IVD industry and its biennial survey on diagnostics ...
(Date:10/27/2014)... 2014 Pressure BioSciences, Inc. (OTCQB: PBIO) ... the development and sale of high pressure-based sample ... today announced that Professor Ruedi Aebersold ... reproducible, and robust method to allow – for ... on small needle biopsy samples by mass spectrometry ...
(Date:10/25/2014)... The report “Adipic Acid Market by ... Global Trends & Forecast to 2019” report analyzes ... drivers, opportunities, and trends in different regions. , ... spread through 217 slides and in-depth TOC on ... to 2019”., http://www.marketsandmarkets.com/Market-Reports/adipic-acid-269.html , Early buyers will ...
Breaking Biology Technology:CU Denver study says upgrading infrastructure could reduce flood damage 2Kalorama: PCR The Go-to Test in Ebola Fight 2Kalorama: PCR The Go-to Test in Ebola Fight 3Breakthrough Method to Permit Quantification of Thousands of Proteins in Needle Biopsy Samples in 12 hours Presented at Major International Scientific Meeting; Method Enabled by Pressure BioSciences' PCT Sample Preparation Platform 2Breakthrough Method to Permit Quantification of Thousands of Proteins in Needle Biopsy Samples in 12 hours Presented at Major International Scientific Meeting; Method Enabled by Pressure BioSciences' PCT Sample Preparation Platform 3Breakthrough Method to Permit Quantification of Thousands of Proteins in Needle Biopsy Samples in 12 hours Presented at Major International Scientific Meeting; Method Enabled by Pressure BioSciences' PCT Sample Preparation Platform 4Breakthrough Method to Permit Quantification of Thousands of Proteins in Needle Biopsy Samples in 12 hours Presented at Major International Scientific Meeting; Method Enabled by Pressure BioSciences' PCT Sample Preparation Platform 5Adipic Acid Market Estimated to Grow $7,539.2 Million by 2019 - Report by MarketsandMarkets 2Adipic Acid Market Estimated to Grow $7,539.2 Million by 2019 - Report by MarketsandMarkets 3Adipic Acid Market Estimated to Grow $7,539.2 Million by 2019 - Report by MarketsandMarkets 4
Cached News: