Featured Research

from universities, journals, and other organizations

Fitness Correlates Of Song Repertoire Size In Free-living Song Sparrows

Date:
March 1, 2005
Source:
University Of Chicago Press Journals
Summary:
Birdsong delights listeners and intrigues evolutionary ecologists. Female birds are thought to preferentially mate with males with more complex or extravagant songs. But why should females prefer these males? What information does a male's song convey?

Birdsong delights listeners and intrigues evolutionary ecologists. Female birds are thought to preferentially mate with males with more complex or extravagant songs. But why should females prefer these males? What information does a male's song convey?

Jane M. Reid and fellow researchers studied a population of song sparrows inhabiting Mandarte Island, British Columbia, Canada, where males sing elaborate repertoires of songs.

They found that male sparrows with larger song repertoire sizes contributed more offspring and grand-offspring to the breeding population on Mandarte. This was because these males lived longer and reared more hatched chicks to independence from parental care, not because the females who mated to males with larger repertoires laid or hatched more eggs.

Furthermore, they discovered that independent offspring of males with larger repertoires were more likely to survive to breed and then to leave more grand-offspring than independent offspring of males with small repertoires.

This effect of paternal repertoire size on offspring performance was stronger in sons than in daughters.

Although they do not yet know whether these patterns reflect genetic or environmental effects on males or their offspring, their results suggest that female song sparrows would leave more descendants in both current and subsequent generations by pairing with males with large song repertoires.

###

This article by Jane M. Reid, Peter Arcese, Alice L. E. V. Cassidy, Sara M. Hiebert, James N. M. Smith, Philip K. Stoddard, Amy B. Marr, and Lukas F. Keller will appear in the March 2005 issue of The American Naturalist.


Story Source:

The above story is based on materials provided by University Of Chicago Press Journals. Note: Materials may be edited for content and length.


Cite This Page:

University Of Chicago Press Journals. "Fitness Correlates Of Song Repertoire Size In Free-living Song Sparrows." ScienceDaily. ScienceDaily, 1 March 2005. <www.sciencedaily.com/releases/2005/02/050222193930.htm>.
University Of Chicago Press Journals. (2005, March 1). Fitness Correlates Of Song Repertoire Size In Free-living Song Sparrows. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2005/02/050222193930.htm
University Of Chicago Press Journals. "Fitness Correlates Of Song Repertoire Size In Free-living Song Sparrows." ScienceDaily. www.sciencedaily.com/releases/2005/02/050222193930.htm (accessed July 28, 2014).

Share This




More Plants & Animals News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com
Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Newsy (July 28, 2014) The asteroid that killed the dinosaurs struck at the worst time for them. A new study says that if it hit earlier or later, they might've survived. Video provided by Newsy
Powered by NewsLook.com
Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 27) Video provided by AP
Powered by NewsLook.com
Russia Saves Gecko Sex Satellite, Media Has Some Fun With It

Russia Saves Gecko Sex Satellite, Media Has Some Fun With It

Newsy (July 27, 2014) The satellite is back under ground control after a tense few days, but with a gecko sex experiment on board, the media just couldn't help themselves. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins