Featured Research

from universities, journals, and other organizations

Weapon Performance Determines Mating Success In The Collared Lizard

Date:
August 3, 2005
Source:
University of Chicago Press Journals
Summary:
In a study published in the September issue of The American Naturalist, A. Kristopher Lappin (Northern Arizona University) and Jerry F. Husak (Oklahoma State University) use the eastern collared lizard (Crotaphytus collaris ), a sexually dimorphic lizard in which the jaws of males function as a weapon in fights, to test the hypothesis that weapon performance (i.e., bite force) is a better predictor of fitness than body size and weapon size.

In a study published in the September issue of The American Naturalist,A. Kristopher Lappin (Northern Arizona University) and Jerry F. Husak(Oklahoma State University) use the eastern collared lizard(Crotaphytus collaris ), a sexually dimorphic lizard in which the jawsof males function as a weapon in fights, to test the hypothesis thatweapon performance (i.e., bite force) is a better predictor of fitnessthan body size and weapon size.

The study finds that bite-force performance was a strong predictorof reproductive success. However, no size measure was correlated withany estimate of mating success or with potential reproductive output.These results counter the conventional wisdom that bigger is alwaysbetter, and they support the hypothesis that weapon performance, whichis likely to directly influence fight outcomes, has far strongereffects on fitness than size.

The strong influence of weapon performance on reproductive successsuggests that selection acts on weapon performance, which in turndrives the evolution of weapon morphology. As such, the use ofmorphology as a proxy for performance and its presumed extensions tofitness should be based, whenever possible, on empiricalmorphologyperformance relationships.

###

Sponsored by the AmericanSociety of Naturalists, The American Naturalist is a leading journal inthe fields of ecology and evolutionary biology and animal behavior. Formore information, please see our website: www.journals.uchicago.edu/AN

A. Kristopher Lappin (Northern Arizona University) and Jerry F.Husak (Oklahoma State University), "Weapon Performance, Not Size,Determines Mating Success and Potential Reproductive Output in theCollared Lizard (Crotaphytus collaris)" 166:3 September 2005.


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. "Weapon Performance Determines Mating Success In The Collared Lizard." ScienceDaily. ScienceDaily, 3 August 2005. <www.sciencedaily.com/releases/2005/08/050803060913.htm>.
University of Chicago Press Journals. (2005, August 3). Weapon Performance Determines Mating Success In The Collared Lizard. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2005/08/050803060913.htm
University of Chicago Press Journals. "Weapon Performance Determines Mating Success In The Collared Lizard." ScienceDaily. www.sciencedaily.com/releases/2005/08/050803060913.htm (accessed August 1, 2014).

Share This




More Plants & Animals News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Vaccine Might Be Coming, But Where's It Been?

Ebola Vaccine Might Be Coming, But Where's It Been?

Newsy (Aug. 1, 2014) Health officials are working to fast-track a vaccine — the West-African Ebola outbreak has killed more than 700. But why didn't we already have one? Video provided by Newsy
Powered by NewsLook.com
Study Links Certain Birth Control Pills To Breast Cancer

Study Links Certain Birth Control Pills To Breast Cancer

Newsy (Aug. 1, 2014) Previous studies have made the link between birth control and breast cancer, but the latest makes the link to high-estrogen oral contraceptives. Video provided by Newsy
Powered by NewsLook.com
Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
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