Navigation Links
Mother birds give a nutritional leg up to chicks with unattractive fathers

Mother birds deposit variable amounts of antioxidants into egg yolks, and it has long been theorized that females invest more in offspring sired by better quality males. However, a study from the November/December 2006 issue of Physiological and Biochemical Zoology shows that even ugly birds get their day. Providing new insight into the strategic basis behind resource allocation in eggs, the researchers found that female house finches deposit significantly more antioxidants, which protect the embryo during the developmental process, into eggs sired by less attractive fathers.

"For female birds, an important aspect of parental investment is the resources allocated to eggs," writes Dr. Kristen J. Navara (Auburn University and Ohio State University) and her coauthors. "The resources available to any female for reproduction and self-maintenance will be finite and she will inevitably be faced with decisions regarding how much resource to invest in each egg in each clutch she lays."

Male house finches display nutrition-linked plumage ranging in color from bright red to drab yellow. The researchers found that eggs sired by unattractive males (those with less brilliant feathers) had more total antioxidants, including 2.5 times the vitamin E levels, than eggs sired by males with redder, more saturated plumage. Thus, they explain, the deposition of more nutrients could represent compensation for the disadvantages experienced by an offspring from a lower quality male, allowing females to supersede limitations of a suboptimal pairing on her own reproductive success.

"For house finches, a species in which individuals are short-lived [and] present a high risk of death, a focus on the immediate reproductive attempts may be the only viable strategy," write the researchers. "By depositing antioxidants in a compensatory manner, females can maximize the reproductive output from the current nesting effort."


'"/>

Source:University of Chicago Press Journals


Page: 1

Related biology news :

1. Mother birds increase progesterone to hatch females
2. Antiretroviral Therapy May Prevent HIV Transmission From Breastfeeding Mothers To Infants
3. Mother knows best: Plant knowledge key to childhood health in remote Amazon
4. Migratory songbirds have a specialized night-vision brain area
5. The lopsided brain: Attention bias is shared by humans and birds
6. Bobbing birds do it for a reason
7. Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals
8. Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows
9. Displaced songbirds navigate in the high Arctic
10. Oil spills and climate change double the mortality rate of British seabirds
11. Wild birds help to create human flu vaccine
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... -- Trends, opportunities and forecast in this market to ... AFIS, iris recognition, facial recognition, hand geometry, vein recognition, ... industry (government and law enforcement, commercial and retail, health ... and by region ( North America , ... , and the Rest of the World) ...
(Date:3/27/2017)... , March 27, 2017  Catholic Health ... and Management Systems Society (HIMSS) Analytics for achieving ... Adoption Model sm . In addition, CHS previously ... U.S. hospitals using an electronic medical record (EMR). ... its high level of EMR usage in an ...
(Date:3/23/2017)... The report "Gesture Recognition and Touchless Sensing Market by Technology (Touch-based ... to 2022", published by MarketsandMarkets, the market is expected to be worth USD ... 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... DALLAS , Oct. 10, 2017 International research firm ... IoT Strategy, will speak at the TMA 2017 Annual Meeting , ... key trends in the residential home security market and how smart safety ... ... "The ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life ... for the life sciences and healthcare industries, announces a presentation by Subbu Viswanathan ... The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary ...
(Date:10/9/2017)... 9, 2017  BioTech Holdings announced today identification ... its ProCell stem cell therapy prevents limb loss ... Company, demonstrated that treatment with ProCell resulted in ... as compared to standard bone marrow stem cell ... in reduction of therapeutic effect.  ...
(Date:10/9/2017)... ... October 09, 2017 , ... At its national board meeting in North Carolina, ... Harvard University’s Departments of Physics and Astronomy, has been selected for membership in ... team for the 2015 Breakthrough Prize in Fundamental physics for the discovery of the ...
Breaking Biology Technology: