HOME >> BIOLOGY >> NEWS
Battle of the sexes leads to evolutionary arms race

Boxes of chocolate and Valentine cards won't get you far in the animal world where courting is considerably tougher than it is for humans. New research by evolutionary biologists from the University of Toronto and the University of Uppsala in Sweden confirm earlier beliefs that an evolutionary "battle of the sexes" can lead to a biological arms race between males and females.

The study, to be published in the Feb. 14 issue of Nature, unveils for the first time a sexual "arms race" in a group of insects - the water strider. Professors Locke Rowe of the University of Toronto's zoology department and Goran Arnqvist of the University of Uppsala in Sweden offer a new and quite different look at the fundamental conflicts of interest between the sexes.

"Males and females of most animal species look and behave very differently," says Rowe. "Males are often provided with various distinct traits like the bright colours of a peacock's feathers, for example. Females, however, aren't easily impressed. These elaborate traits in males have traditionally been explained as evolutionary consequences of females searching for good fathers for their offspring."

The key to their research lies in the fact that males and females play very different roles in reproduction. What is best for one sex is rarely best for the other, leading to a range of sexual conflicts, says Rowe. "Males of most animal species benefit from mating often with as many partners as possible while females, who are already mated, lose from mating too much. Males, therefore, seek to 'convince' females to mate while females evolve resistance measures to foil the male's mating attempts."

The traits which males use in these conflicts vary, ranging from elaborate ornaments to grasping structures that make it difficult for females to escape. The result of such sexual conflict is, in theory, an "arms race" between the sexes whereby male persistence is matched by female resistance. Such arms rac
'"/>

Contact: Janet Wong
jf.wong@utoronto.ca
416-978-6974
University of Toronto
13-Feb-2002


Page: 1 2

Related biology news :

1. Battle between bubbles might have started evolution
2. AAAS hosts Battle of the Brains to choose area student for international competition
3. Battle of the DNA bulge may help thwart cancer
4. Battle lasers
5. System failure to blame for Walkerton, North Battleford outbreaks, says U of T study
6. Researchers working to devise plan for Palo Alto Battlefield Restoration
7. Battle of the sexes leads to a biological arms race
8. Battle to save last stronghold of the red squirrel
9. Baby Dolphin "Little Orphan Annie" Loses Battle For Her Life
10. Late Blight Battle Goes Online, Marking 150 Year Struggle Since Irish Potato Famine
11. Study explains spatial orientation differences between sexes

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Battle the sexes leads evolutionary arms race

(Date:11/3/2014)... , Nov. 3, 2014  NeuroSigma ® , ... life sciences company focused on commercialization of its ... for the treatment of neurological and neuropsychiatric disorders, ... Property has issued a Notice of Allowance for ... is co-owned by NeuroSigma and the Regents of ...
(Date:11/2/2014)... Physics World , James Dacey explores the ways in ... take their innovations from the lab into the commercial ... all start-up companies as they move from prototype to ... main factors: physics-based inventions are usually far from market-ready ... be a lot more complicated than had been originally ...
(Date:11/2/2014)... fascinating to put a flashlight up to our palms ... University in St. Louis engineers are using a similar ... improve imaging of cancerous tissues and to develop potential ... Beare Distinguished Professor of Biomedical Engineering at the School ... time-reversal technology that allows researchers to better focus light ...
Breaking Biology News(10 mins):NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 2NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 3The 'valley of death' facing physics start-ups 2Improving imaging of cancerous tissues by reversing time 2
(Date:11/26/2014)... Nov. 25, 2014  Roka Bioscience, Inc. (NASDAQ: ... testing solutions for the detection of foodborne pathogens, today announced ... Piper Jaffray  26 th Annual Healthcare Conference on December ... at The New York Palace in New York, ... information concerning the Company, its operations, strategies and prospects may ...
(Date:11/24/2014)... 2014 Five American winners will ... Maktoum Awards for Medical Sciences", in its 8 th ... Emirates , on 15 December 2014. ... The Carter Center which won the Hamdan Award for ... numerous programs that aim to improve health and promote ...
(Date:11/24/2014)... , Nov. 24, 2014 VolitionRx Limited ... tests for cancer and other conditions, today announced that data ... the Science for Business BioWin Day 2014, being held November ... data come from VolitionRx,s lung cancer pilot study, the samples ... Centre Hospitalier Universitaire (CHU) de Liege in Belgium ...
(Date:11/24/2014)... 2014   Veracyte, Inc. (Nasdaq: VCYT ... and chief executive officer, will present in a fireside chat ... Conference on Tuesday, December 2, 2014 at 12:30 p.m. ET ... live audio webcast and subsequent replay may be accessed by ... the website at least 15 minutes prior to the live ...
Breaking Biology Technology:Roka Bioscience to Present at the Piper Jaffray Healthcare Conference 2Five US Winners Among Recipients of Hamdan Medical Awards 2VolitionRx to Present Positive Data from Pilot Lung Cancer Study at BioWin Day 2014 2VolitionRx to Present Positive Data from Pilot Lung Cancer Study at BioWin Day 2014 3VolitionRx to Present Positive Data from Pilot Lung Cancer Study at BioWin Day 2014 4VolitionRx to Present Positive Data from Pilot Lung Cancer Study at BioWin Day 2014 5VolitionRx to Present Positive Data from Pilot Lung Cancer Study at BioWin Day 2014 6Veracyte to Present at the Piper Jaffray 26th Annual Healthcare Conference 2
Cached News: