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:1/13/2016)... , January 13, 2016 ... has published a new market report titled - Biometric Sensors ... and Forecast, 2015 - 2023. According to the report, the global ... and is anticipated to reach US$1,625.8 mn by 2023, ... 2023. In terms of volume, the biometric sensors market ...
(Date:1/11/2016)... Synaptics Incorporated (NASDAQ: SYNA ), the ... its ClearPad ® TouchView ™ 4300 touch ... categories in the 8 th Annual Mobile Excellence ... The Synaptics ® TDDI solution enables faster time-to-market, ... devices, brighter displays and borderless designs. ...
(Date:1/8/2016)... MANCHESTER, United Kingdom , Jan. 8, 2016 ... innovative sensor-based diagnostic products, today announced the closing of a ... existing investors.  Proceeds from the financing will be used to ... hand-held device for detecting early-stage pressure ulcers. ... after receiving CE Mark approval. The device,s introduction has ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... Florida , February 11, 2016 ... PositiveID Corporation ("PositiveID" or "Company") (OTCQB: PSID), a ... announced today that its Thermomedics subsidiary, which markets ... on its growth plan in January 2016, including ... distributors, increasing sequential monthly sales growth, and establishing ...
(Date:2/10/2016)... /PRNewswire/ - BioAmber Inc. (NYSE: BIOA ), a ... Mitsui & Co. Ltd., its partner in the ... investing an additional CDN$25 million in the joint venture ... 30% to 40%.  Mitsui will also play a stronger ... Sarnia , providing dedicated resources alongside ...
(Date:2/10/2016)... ... February 10, 2016 , ... ... that it has joined the Human Vaccines Project, a public-private partnership to ... cancer. , The Human Vaccines Project brings together leading pharmaceutical and ...
(Date:2/10/2016)... (PRWEB) , ... February 10, 2016 , ... ... attend the International Society of Pharmaceutical Engineering (ISPE) Rocky Mountain Chapter 21st Annual ... is expecting to fill more than 100 tables for its annual event, which ...
Breaking Biology Technology: