Navigation Links
In the animal world, bigger isn't necessarily better
Date:12/11/2008

TORONTO, ON. Shocking new research shows size isn't always an advantage in the animal world, shattering a widely-held belief that bigger is better.

Michael Kasumovic, a former University of Toronto Scarborough PhD student, examined Australian Redback male spiders to determine whether the larger ones had an edge in achieving mating success and producing offspring.

Surprisingly, Kasumovic found the large spiders didn't always have an advantage. Instead, because the larger males experienced a much longer maturation process, they were unable to search for and mate with females and produce offspring at the same rate as the smaller Redback spiders.

"Most people assume that large size and weaponry are key indicators of a male's fitness, because those traits help them dominate smaller males," says Kasumovic, now a post-doctoral research fellow at the University of New South Wales. "However, smaller males develop sooner and are therefore able to mate with females before the larger males. So while large males may dominate in combat, they are unable to compete with the smaller males in terms of mate searching."

The study, currently published online in the Journal of Evolutionary Biology, emphasized the important role maturation time plays in defining a successful male.

"Size is no longer the only ruler by which we can measure a male's quality," says Kasumovic. "Many other factors, including maturation time, are critical in that definition."


'/>"/>

Contact: April Kemick
april.kemick@utoronto.ca
416-978-5949
University of Toronto
Source:Eurekalert

Page: 1

Related biology news :

1. Small animal imaging facility is big boon to research
2. Report: African, Asian, Latin American farm animals face extinction
3. UT researcher sheds new light on hybrid animals
4. Penn Veterinary Medicine report new strategy to create genetically-modified animals
5. UT researcher sheds new light on hybrid animals
6. PETA awards $120,000 to Duluth Foundation for advancing non-animal tests
7. New animal and plant species found in Vietnam
8. Fungus genome yielding answers to protect grains, people and animals
9. Green algae -- the nexus of plant/animal ancestry
10. Animal food allergens unmasked
11. Brain cell growth diminishes long before old age strikes, animal study shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... analysis of NASA satellite data shows Africa,s Congo rainforest, ... a large-scale decline in greenness over the past decade. ... at Albany, State University of New York, shows between ... of forest area and intensified. The research, published Wednesday ... comprehensive observational studies to explore the effects of long-term ...
(Date:4/23/2014)... Burning coal for domestic heating may contribute to early ... from The Saban Research Institute of Children,s Hospital Los ... in the world. , In a paper published today ... researchers report ,"alarmingly strong statistical correlations" between seasonal ambient ... , UB has one of the highest levels ...
(Date:4/23/2014)... -- Like a hungry diner ripping open a dinner ... electricity must tear open a hydrogen molecule. Now researchers ... onto the two halves of its hydrogen feast. The ... to make the catalyst work better for alternative energy ... have shown precisely where the hydrogen halves end up ...
Breaking Biology News(10 mins):NASA satellites show drought may take toll on Congo rainforest 2NASA satellites show drought may take toll on Congo rainforest 3Pollutants from coal-burning stoves strongly associated with miscarriages in Mongolia 2Halving hydrogen 2Halving hydrogen 3Halving hydrogen 4
... disappearance of seed-dispersing animals like elephants and rhinoceroses puts ... of South-East Asia at risk. With the help of ... that not even herbivores like tapirs can replace them. ... tropical forests: They are vital to forest regeneration and ...
... -- WanderID announces the launch of its biometric face ... individuals who cannot reliably communicate in case of emergency, ... children, the company,s product is now in use among ... KXAN video link  here ] , Bee Cave Police ...
... the Department of Energy,s Oak Ridge National Laboratory to analyze ... efforts to understand more complex microbial communities such as those ... the Proceedings of the National Academy of Sciences , ... marine worm known as Olavius algarvensis. The worm lacks a ...
Cached Biology News:The absence of elephants and rhinoceroses reduces biodiversity in tropical forests 2The absence of elephants and rhinoceroses reduces biodiversity in tropical forests 3WanderID Launches Breakthrough ID Product for Children, Seniors 2ORNL protein analysis investigates marine worm community 2
(Date:1/15/2014)... AudioNotch is the internet's leading provider ... treatment of tinnitus. Patients listen to sound therapy that ... period of weeks to months, their tinnitus volume decreases. , ... Notched Music and Notched White Noise. Now, AudioNotch is pleased ...
(Date:1/14/2014)... 2014 Carahsoft and CDS Federal Services ... 2014 at 2pm EST (11am PST), “Natural Language Processing: ... on how technology can turn raw, heterogeneous data into ... agencies. The online webinar will last approximately one hour. ...
(Date:1/14/2014)... 14, 2014 As pet owners drew up their lists of ... wrote: "Take better care of my furry companion." Nowadays there are ... top-brand carrying cases to take the little canine or feline darlings ... compelled to buy some pricey toys at the pet store. But ...
(Date:1/14/2014)... SAN DIEGO and BETHESDA, Md. ... they are joining together with two institutes from the ... more reliable tools for bringing safer, more effective treatments ... with the National Center for Advancing Translational Sciences (NCATS) ...
Breaking Biology Technology:Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3
... effective when ... and vaccines, ANN ARBOR, Mich., Oct. 21 ... data in nine presentations that,detail key milestones in its ... fibrosis and an intra-nasal,influenza vaccine during the joint meeting ...
... Mich., Oct. 21 Terumo Heart, Inc. announced,today ... Ventricular,Assist System (LVAS), marking an important early milestone ... Dr. Francis Pagani performed the five implants,at the ... with three,of the surgeries performed off-pump., "We ...
... progress being made as distribution channel reorders,continue, ... Corp. (BIEL),the maker of ActiPatch(R) Therapy, the ... operated microchip delivering continuous pulse,therapy that revolutionizes ... has,achieved additional distribution penetration into the Canadian ...
Cached Biology Technology:NanoBio to Announce Key Clinical and Preclinical Data in Nine Presentations at ICAAC/IDSA 2008 2Fifth DuraHeart(TM) U.S. Implant Marks Important Milestone in U.S. Pivotal Trial 2BioElectronics Announces Significant Progress in Canadian and International Distribution 2
... a complete, flexible system designed specifically ... as is frequently required in biological ... Instechs miniature Clark-style polarographic electrode. Measuring ... diameter (3.2 mm), it is ideal ...
... ALDEFLUOR Stem Cell Identification ... comprises a substrate for ... (ALDH) that is highly ... stem cells, making ALDH ...
... Monoclonal Antibody is a mouse monoclonal ... the 26 kDa glutathione-S-transferase (GST) domain ... antibody is suitable for detecting fusion ... in E. coli , yeast, mammalian, ...
... System is the cost-effective solution for entry ... to common research imaging tasks, MetaVue enables ... simple image analysis. Compatibility with MetaMorphs ... that MetaVue has the power to drive ...
Biology Products: