Navigation Links
Mating mites trapped in amber reveal sex role reversal
Date:2/28/2011

ANN ARBOR, Mich.---In the mating game, some female mites are mightier than their mates, new research at the University of Michigan and the Russian Academy of Sciences suggests. The evidence comes, in part, from 40 million-year-old mating mites preserved in Baltic amber.

In a paper published March 1 in the Biological Journal of the Linnean Society, researchers Pavel Klimov and Ekaterina Sidorchuk describe an extinct mite species in which the traditional sex roles were reversed.

"In this species, it is the female who has partial or complete control of mating," said Klimov, an associate research scientist at the U-M Museum of Zoology. "This is in contrast to the present-day reproductive behavior of many mite species where almost all aspects of copulation are controlled by males."

In mites, as in other animals including humans, the battle of the sexes has been raging throughout evolutionary history. Each gender struggles to get the upper hand to assure that their interests are protected. In the case of mites, males benefit from coercing females to mate and making sure no other males mate with them. Harassing reluctant females, guarding females before and after mating and fighting off competing males are typical behaviors.

Females, on the other hand, gain an evolutionary advantage if they have some control over matters of mating. This allows them to choose superior males to mate with, while rejecting losers (who may be, however, extremely adept at coercing females), and it spares them the wear and tear of being subjected to harassment, guarding and frequent copulation.

In the extinct mite species Glaesacarus rhombeus, the male lacks the specialized organs for clinging to females that are seen in many present-day mites. The female, however, has a pad-like projection on her rear end that allows her to control the clinging. A remarkably preserved copulating pair of mites found in amber gave Klimov and Sidorchuk a glimpse at how the apparatus worked.

Structures found in some living mites also show evidence of female control over mating, Klimov said. "Some lineages have developed female copulatory tubes that function like a penis."


'/>"/>

Contact: Nancy Ross-Flanigan
rossflan@umich.edu
734-647-1853
University of Michigan
Source:Eurekalert  

Related biology news :

1. Mosquitoes create harmonic love song before mating, study finds
2. Fruit flies sick from mating
3. Mating that causes injuries
4. Bats use love songs during mating, researchers say
5. Loyal alligators display the mating habits of birds
6. Mystery solved: Facial cancer decimating Tasmanian devils likely began in Schwann cells
7. Male antelopes deceive females to increase their chances of mating
8. Whale sharks may produce many litters from 1 mating, paternity test shows
9. Nightshades mating habits strike uneasy evolutionary balance
10. SU scientists find that in the evolutionary mating game, brawn and stealth rule
11. Researchers working toward automating sedation in intensive care units
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Mating mites trapped in amber reveal sex role reversal
(Date:2/21/2017)... , February 21, 2017 Der ... US-Dollar wachsen. Nach einem Gespräch mit mehr als 50 Vertretern ... Hindernisse zu überwinden gilt, um diese Prognose zu realisieren. ... ... die Mobilisierung der finanziellen Mittel für die Biobank, die ...
(Date:2/13/2017)... 2017 Former 9/11 Commission border counsel and ... Janice Kephart of Identity Strategy Partners, LLP, today ... "Executive Order: Protecting the Nation From Foreign Terrorist ... "As President Trump,s ,Travel Ban, Executive Order gains ... banned the travel ban, it is important that our ...
(Date:2/8/2017)... 2017  Aware, Inc. (NASDAQ: AWRE ), a ... results for its quarter and year ended December 31, 2016. ... was $3.9 million compared to $6.9 million in the same ... 2016 was $0.6 million compared to $2.6 million in the ... of 2016 was $0.5 million, or $0.02 per diluted share, ...
Breaking Biology News(10 mins):
(Date:2/27/2017)... 27, 2017 Four US Biotech ... today, and they are: Anthera Pharmaceuticals Inc. (NASDAQ: ANTH), ... Inc. (NASDAQ: PACB), and Conatus Pharmaceuticals Inc. (NASDAQ: ... Trends, market observers are growing more bullish on the ... reforms to free cash held overseas for tax reason ...
(Date:2/27/2017)... ... , ... In starting a program to hire college athletes, Catalyst ... for skill.” , In keeping with this philosophy, the Catalyst an Iowa premix manufacturer ... hoping to replicate the practice throughout the company. , “I’ve heard coaches talk on ...
(Date:2/25/2017)... ... February 25, 2017 , ... The STARR ... an ongoing effort to create meaningful change by increasing communication, partnerships and goodwill ... on consumers and patients’ mental health well-being. , Both organizations are dedicated to ...
(Date:2/24/2017)... ... February 24, 2017 , ... Chef Jodi Abel has returned from her ... in several cities, she gained a number of delicious recipes and new techniques to ... in South Africa’s Western Cape province. It is internationally renowned for its incredible ...
Breaking Biology Technology: