Navigation Links
Mating that causes injuries

Researchers at Uppsala University can now show that what is good for one sex is not always good for the other sex. In fact, evolutionary conflicts between the two sexes cause characteristics and behaviors that are downright injurious to the opposite sex. The findings are being published in the scientific journal Current Biology.

In both males and females in the animal world it is common much more common that one might like to think for one sex to evince characteristics and properties that are injurious to individuals of the other sex, according to Professor Gran Arnqvist at the Department of Ecology and Evolution, who adds:

"One especially tricky case involves species where the males have mating organs that are supplied with hooks, barbs, and flukes that cause internal injuries in females during mating. This is extremely common among insects, but it also occurs in many other animal groups."

The Uppsala scientists have studied seed beetles and their mating behavior. Gran relates that the males' mating organ is rather similar to a medieval spiked club and that it causes severe wounds in females during mating. But since it is never a good idea for a male merely to injure a female, the researchers have assumed that these structures serve another purpose and that the injury is an unfortunate side effect.

"Females' injuries as such do not benefit the male she mated with. It has been suggested rather that the injuries are a side effect of other benefits the males reap from the barbs. Now, for the first time, we are able to show that this is the case," says Gran Arnqvist.

Despite these costs, females mate with multiple males.

"We also show that males with long barbs cause more severe injuries to females, but also that these males have a greater rate of fertilization success," says Gran Arnqvist.

The barbs are thus extremely important to males in their competition to be able to fertilize an egg. When females mate with two males, it is more often the male with the longer barbs that fertilizes her eggs.


Contact: Goran Arnqvist
Uppsala University

Related biology news :

1. Three-way mating game of North American lizard found in distant European relative
2. For honey bee queens, multiple mating makes a difference
3. The precise role of seminal proteins in sustaining post-mating responses in fruit flies
4. Science, not romance, controls mating at Smithsonians National Zoo
5. Killer whales, blind bats, discriminating dolphins, mating birds
6. Lionfish decimating tropical fish populations, threaten coral reefs
7. 1 missing gene leads to fruitless mating rituals
8. Mosquitoes create harmonic love song before mating, study finds
9. Fruit flies sick from mating
10. Hidden interactions between predators and prey: evolution causes cryptic dynamics in ecology
11. Grubs passion for plastic causes water loss
Post Your Comments:
(Date:10/29/2015)... Oct. 29, 2015 Today, LifeBEAM ... partnership with 2XU, a global leader in technical ... smart hat with advanced bio-sensing technology. The hat ... to monitor key biometrics to improve overall training ... the two companies will bring together the most advanced ...
(Date:10/27/2015)... Synaptics Inc. (NASDAQ: SYNA ), the leader ... adopted the Synaptics ® ClearPad ® Series ... newest flagship smartphones, the Nexus 5X by LG and ... --> --> Synaptics works closely with ... in the joint development of next generation technologies. Together, ...
(Date:10/26/2015)...  Delta ID Inc., a company focused on bringing ... devices, announced its ActiveIRIS® technology powers the iris recognition ... by NTT DOCOMO, INC in Japan ... to include iris recognition technology, after a very successful ... May 2015, world,s first smartphone to have this capability. ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... PUNE, India , November 26, 2015 /PRNewswire/ ... The Global Biobanking Market 2016 - 2020 ... biobanks by maintaining integrity and quality in long-term ... and enabling long-term cost-effectiveness. Automation minimizes manual errors ... improves the technical efficiency. Further, it plays a ...
(Date:11/25/2015)... 25, 2015 2 nouvelles études permettent ... les différences entre les souches bactériennes retrouvées dans la ... des êtres humains . Ces recherches  ouvrent une nouvelle ... prise en charge efficace de l,un des problèmes ... chats .    --> 2 nouvelles études ...
(Date:11/25/2015)... HOLLISTON, Mass. , Nov. 25, 2015 /PRNewswire/ ... ), a biotechnology company developing bioengineered organ implants for ... will present at the LD Micro "Main Event" ... p.m. PT. The presentation will be webcast live and ... will also be available at the conference for one-on-one ...
(Date:11/25/2015)... , Nov. 25, 2015 /PRNewswire/ - Aeterna Zentaris Inc. ... its business and prospects remain fundamentally strong and ... (zoptarelin doxorubicin) recently received DSMB recommendation to continue ... following review of the final interim efficacy and ... Primary Endpoint in men with heavily pretreated castration- ...
Breaking Biology Technology: