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:2/7/2017)... --  MedNet Solutions , an innovative SaaS-based eClinical technology ... is pleased to announce that the latest release of ... and award winning eClinical solution, is now available for ... a proven Software-as-a-Service (SaaS) clinical research technology platform that ... delivers an entire suite of eClinical tools to support ...
(Date:2/3/2017)... WASHINGTON , Feb. 3, 2017 A ... Identity Strategy Partners, LLP (IdSP) . Designed to ... in the complex identity market, founding partners Mark ... nearly 35 combined years just in identity expertise that ... tank and non-profit leadership. The Crego-Kephart combined expertise has ...
(Date:1/31/2017)... 31, 2017  Spero Therapeutics, LLC, a biopharmaceutical ... treatment of bacterial infections, today announced it has ... from Pro Bono Bio Ltd (PBB) to bolster ... resistant forms of Gram-negative bacteria.   The assets acquired ... a PBB group company. "The acquisition ...
Breaking Biology News(10 mins):
(Date:2/24/2017)...  Aethlon Medical, Inc. (Nasdaq: AEMD ), ... and CEO, Jim Joyce . In ... Saturday, Bill Gates warned world leaders that ... nuclear weapons. Mr. Gates expressed his concern, which is ... scientific terrorists have access to the necessary tools to ...
(Date:2/24/2017)... , ... February 24, 2017 , ... FireflySci, Inc is ... in late 2014, FireflySci had the goal of bringing their powerful cuvette ... to shape the path that FireflySci is going on as they add yet another ...
(Date:2/23/2017)... and NEW YORK ... HIMSS, Lumeon , a leading digital health ... Telehealth), a provider of telemedicine and remote patient ... pathways for telemedicine reimbursements.  DN ... their patients, in real-time, extending consultations beyond a ...
(Date:2/23/2017)... Calif. , Feb. 23, 2017  MIODx ... license for two key immunotherapy technologies from the ... technology provides a method to monitor a patient ... as PD-L1 and CTLA-4.  The second license extends ... a patient is likely to have an immune-related ...
Breaking Biology Technology: