Navigation Links
Scientists Report New Take on Sexual Signaling

In dangerous environments, females looking for a mate run great risks. Scientists from Seoul National University, in Korea, and the Smithsonian Tropical Research Institute in Panama present a new take on sexual signaling in the May issue of the Public Library of Science. The researchers report that females prefer a male sexual signal that helps them avoid their predators as they sequentially visit and assess potential mates.

The traditional explanation for the evolution of outrageous sexual signals like the male peacocks plumage is that showy males attract females and give them better offspring. Showy males escape from predators despite their highly conspicuous ornaments and behaviorsproof of their superiority.

"In our study of fiddler crabs, the strength of female preference for a male signal that increases her own survival increases with her perceived risk of predation. That a females choice of a mate is based on sexual signals that benefit her directly is a fundamentally new and perhaps widely applicable idea," said Tae Won Kim, who did this work as a student at Seoul National University and is now a post-doctoral fellow at Ewha Womens University in Korea.

As the tide recedes, revealing great expanses of Pacific beach, fiddler crabs (Uca terpsichores) segue in and out of their burrows, dodging predatory shorebirds. Male crabs build hood-like sand castles next to the entrance of their burrows, attracting the attention of females by waving their one, super-sized claw.

Females prefer males that have built hoods to males that have not. When they run across the beach to check out or mate with a male, they orient visually to both the waving male and to his hood. In this way they reach the males burrow quickly and directly and avoid their predators.

"When we bait predatory birds into the areaartificially increasing the risk of predation, females show an even greater preference for males who have built hoods," sa id STRI staff scientist John Christy, who has studied sexual selection in this group for nearly 35 years. This study illustrates how the ecology of choosing a mate can shape sexual communication. "Conspicuous male sexual signals need not advertise the quality of the signaler as a mate," Christy suggests. "Some may simply allow choosy females to stay safe."


'"/>




Related medicine news :

1. Scientists plan human cloning clinic in the United States
2. Scientists found ancient Human Germ Killer
3. Scientists locate key hormone involved in appetite control
4. Scientists open the book of life
5. Scientists review SARS
6. Scientists crack dengue fever puzzle
7. Scientists push to lower hidden sodium in food
8. Indian Scientists Make Wide-Ranging Analysis And Annotation Of X Chromosome
9. Scientists have found effective brain regions for deep brain stimulation for Parkinson’s
10. Scientists reveal the secrets of sarcasm
11. Scientists Unveil Mechanism Behind Resistance to Severe Malaria
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/13/2017)... ... October 13, 2017 , ... As health professionals work to improve their approach ... patient is doing more than filling out a survey; in many cases health professionals ... emphasis in health care and research on the importance of active engagement with patients ...
(Date:10/13/2017)... EDWARDSVILLE, Ill. (PRWEB) , ... ... ... University Edwardsville School of Pharmacy (SOP) alumni Hannah Randall, PharmD ‘17, and ... educated healthcare professionals on guideline updates for the primary prevention of cardiovascular ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Ellevate Network, the ... business to advocate for action towards gender equality at their inaugural Summit in New ... the globe, and reached a social audience of over 3 million. To watch the ...
(Date:10/13/2017)... ... ... “The Journey: From the Mountains to the Mission Field”: the story of ... Philippines. “The Journey: From the Mountains to the Mission Field” is the creation of ... taught all ages and currently teaches a class of ladies at her church, which ...
(Date:10/12/2017)... ... October 12, 2017 , ... The company has developed ... consumer and regulatory authorities worldwide. From Children’s to Adults 50+, every formula has ... highest standard. , These products are also: Gluten Free, Non-GMO, Vegan, Soy ...
Breaking Medicine News(10 mins):
(Date:9/22/2017)... -- AVACEN Medical (AVACEN) announced that its CE-Marked AVACEN ... with the widespread pain associated with fibromyalgia in the ... Essex, England commented, "I had difficulty ... sleep at all, tremendous pain, with every movement sending ... AVACEN 100] enough, how this has and is helping ...
(Date:9/18/2017)... Sept. 18, 2017 EpiVax, Inc. ... bioinformatics and immune engineering, today announced a ... A (H7N9) vaccine. ... seasonal influenza and presents a challenge for ... exposure to be effective. Using state-of-the-art bioinformatics and ...
(Date:9/12/2017)... 12, 2017  ValGenesis Inc., the global leader ... pleased to announce the appointment of Dr. ... Board of Directors and Chairman of Advisory Board ... science companies to manage their entire validation lifecycle ... in this process. Furthermore, ValGenesis VLMS enables rigorous ...
Breaking Medicine Technology: