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:8/19/2014)... Scientists at the Houston Methodist Research Institute have figured ... using a pipette -- a common laboratory tool that,s ... preliminary test results in a recent issue of the ... "Studying single cells and their unique functions has become ... faculty member Lidong Qin, Ph.D., the project,s principal investigator. ...
(Date:8/19/2014)... of UTSA researchers has been awarded a nearly $40,000 ... Training (NCPTT), an office of the National Park Service ... will fund a one-year study of the energy efficiency ... homes in hot, humid climates. , Radiant barriers are ... that reflect heat back, thereby reducing the amount of ...
(Date:8/19/2014)... used to treat pain, but its effect on ... In a recent study reported on the ... 2014), rat models of an avulsion injury to ... chronic neuropathic pain) were given electroacupuncture stimulation at ... Yanglingquan (GB34). After electroacupuncture therapy, chronic neuropathic pain ...
Breaking Biology News(10 mins):Moving single cells around -- accurately and cheaply 2UTSA researcher awarded $38K+ to evaluate energy efficiency options for historic homes 2UTSA researcher awarded $38K+ to evaluate energy efficiency options for historic homes 3
(Date:8/18/2014)... Sterne, Kessler, Goldstein & Fox P.L.L.C. , an intellectual ... , announced today that it has filed eleven petitions ... U.S. Patent and Trademark Office (USPTO) on behalf of ... BRLI).  These IPR petitions aim to nullify eleven patents ... patents have been asserted against GeneDx in patent infringement ...
(Date:8/18/2014)... 18, 2014 According to ... Research "Life Science Reagents Market(Products- PCR Reagent Kits, ... In-Vitro Diagnostic Reagents and Others; End Users- Commercial ... Laboratories, and Forensic Laboratories)- Global Industry Analysis, Size, ... the global life science reagents market was valued ...
(Date:8/18/2014)... Aug. 18, 2014 Dyadic International, Inc. ... patented and proprietary technologies are used to develop, ... the bioenergy, bio-based chemical, biopharmaceutical and industrial enzyme ... Registration Statement on Form 10 with the U.S. ... Logo - http://photos.prnewswire.com/prnh/20110621/CL06708LOGO ...
(Date:8/16/2014)... Firms in the Scientific ... advisory services to businesses, government bodies and nonprofit ... are highly diverse as operators assist a range ... geological and geophysical consulting services to risk management ... five years, the recovery of the Canadian economy ...
Breaking Biology Technology:Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 2Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 2Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 4Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 5Dyadic International Files Form 10 Registration Statement 2Dyadic International Files Form 10 Registration Statement 3Dyadic International Files Form 10 Registration Statement 4Scientific and Economic Consulting in Canada Industry Market Research Report Now Available from IBISWorld 2Scientific and Economic Consulting in Canada Industry Market Research Report Now Available from IBISWorld 3
Cached News: