HOME >> BIOLOGY >> NEWS
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."


'"/>

Contact: Suzanne Wu
swu@press.uchicago.edu
773-834-0386
University of Chicago Press Journals
25-Sep-2006


Page: 1

Related biology news :

1. Mother-of-pearl -- Classic beauty and remarkable strength
2. Mother birds engineer their offspring
3. Mother knows best: Plant knowledge key to childhood health in remote Amazon
4. Mothers who gain weight between pregnancies may experience pregnancy complications
5. Mother deer cannot recognize the calls of their own offspring but sheep and reindeer can
6. Mother birds increase progesterone to hatch females
7. Mothers prenatal and lactational diet may protect daughters from breast cancer
8. Motherwells babies study may yield up clues for adult diseases
9. Mothers speak: Physicians often fall short when delivering a down syndrome diagnosis
10. Art and music for the birds
11. What determines the speed at which birds fly?

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/5/2020)... (PRWEB) , ... August 05, 2020 , ... Regenative Labs ... two new innovations, CoreText™ and ProText™, making them the first Wharton’s jelly allografts to ... using a syringe. The company’s solutions are the first Wharton’s jelly allograft product to ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has ... Invictus Medical Neoasis™ active noise control device to attenuate typical noises in a ... device attenuated the alarm sounds from patient monitors, ventilators and other bedside devices ...
(Date:7/2/2020)... ... July 01, 2020 , ... ... phase 1a findings of Neihulizumab, a biologic for the treatment of steroid-refractory acute ... Led by hemato-oncologist Dr. Paul J Martin of the Fred Hutchinson Cancer Research ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... N.J (PRWEB) , ... July 29, 2020 , ... ... company, and Catalent, the leading global provider of advanced delivery technologies, development, and ... today announced that they have entered into a strategic partnership whereby Catalent will ...
(Date:7/18/2020)... (PRWEB) , ... July 16, 2020 , ... After research ... The completion of a great surgery is only the beginning of a successful study, ... research community. , Join Brad Gien, Global Head of Surgery from Envigo ...
(Date:7/10/2020)... ... July 09, 2020 , ... ... that Massachusetts Institute of Technology (MIT) has expanded the company’s exclusive license ... to move into the point-of-care diagnostic market, focusing initially on the SARS-CoV-2 ...
(Date:7/1/2020)... , ... June 29, 2020 , ... ... to date growth of 40% in 2020, despite many obstacles created as a ... aims to increase revenue for its partnered medical practices and medical manufacturers by ...
Breaking Biology Technology:
Cached News: