Navigation Links
The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

In many animals, males advertise to potential mates with showy traits, many of which are linked to testosterone levels. However, a new study suggests that, in fish, choosing a flashier mate may cause future generations to be more susceptible to pathogens.

In the January 2007 issue of The American Naturalist, a new study by Judith Mank (Uppsala University, Sweden) finds that mating with males who possess showy traits ?such as bright colors or long tails and fins ?results in higher testosterone levels in males over many generations. Because male and female testosterone levels are correlated, female choice also results in an increase in female testosterone levels.

Testosterone is an immune suppressor, and increases in testosterone can reduce an animal's ability to fight off diseases. Therefore, a female's choice of a male with exaggerated ornaments may make her daughters and granddaughters less able to resist pathogens, Mank argues.

However, there may be some benefits for the females. For example, females are larger than males in many fish species, perhaps because of the requisite energetic burdens of producing massive amounts of roe, and elevated testosterone increases body size.

Thus, as Mank writes: "The benefits of increased body size to roe production and mate selection may, at least in some cases, counter the immunosuppressive effects of elevated testosterone in females."


'"/>

Source:University of Chicago Press Journals


Page: 1

Related biology news :

1. Restaurant seafood prices since 1850s help plot marine harvests through history
2. Sexual cooperation: Mating increases longevity in ant queens
3. Same-Sex Mating Discovered in a Toxic Fungus
4. Mother birds increase progesterone to hatch females
5. Male elephants woo females with precise chemistry
6. New study explores beetle species with two forms of females
7. Male rivalry increases when females at most fertile, say researchers
8. Brain differences could explain why males and females experience pain relief differently
9. Insects that produce males from unfertilized eggs reveal a surprising cellular feat
10. UCLA study finds same genes act differently in males and females
11. Choosy females make colourful males
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/21/2016)... WAKEFIELD, Massachusetts , March 22, 2016 ... and facial recognition with passcodes for superior security ... MESG ), a leading provider of secure digital communications ... pilot their biometric technology and offer enterprise customers, particularly ... provide secure facial recognition and voice authentication within a ...
(Date:3/15/2016)... , March 15, 2016 --> ... published by Transparency Market Research "Digital Door Lock Systems Market ... 2015 - 2023," the global digital door lock systems market ... in 2014 and is forecast to grow at a CAGR ... micro, small and medium enterprises (MSMEs) across the world and ...
(Date:3/14/2016)... 14, 2016 http://www.apimages.com ) ... --> - Renvoi : image disponible via AP ... --> --> DERMALOG, le leader ... nouveaux lecteurs d,empreintes digitales pour l,enregistrement des réfugiés ... utilisé pour produire des cartes d,identité aux réfugiés. ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... 2016 Q BioMed Inc. (OTCQB: QBIO), ... a featured presenter at the 5th Annual Marcum MicroCap Conference ... City at the Grand Hyatt Hotel. ... Inc. CEO, is scheduled to begin at 11a.m ET in ... strategy, recent developments and outline milestones for the balance of ...
(Date:5/26/2016)... ... May 26, 2016 , ... FireflySci has been manufacturing ... laboratories all over the globe. Their cute firefly logo has been spreading to ... FireflySci makes spectrophotometer calibration standards that never require recalibration. These revolutionary standards ...
(Date:5/25/2016)... ... 2016 , ... Founder of the Fitzmaurice Hand Institute in ... of the hand by the National Board of Physicians and Surgeons, as of ... in his pursuit of providing the most comprehensive, effective treatment for his patients, ...
(Date:5/25/2016)... ... May 25, 2016 , ... Lady had been battling arthritis since the age ... her left knee. Lady’s owner Hannah sought the help of Dr Jeff Christiansen of ... repair her cruciate ligament and help with the pain of Lady’s arthritis. Dr Christiansen ...
Breaking Biology Technology: