HOME >> BIOLOGY >> NEWS
Common Cannibals, A New Study Examines The Role That Intraspecific Predation Plays In Determining The Dynamics Of A Population

While humans may find the thought of cannibalism unsettling, other species seem to eat their own kind quite readily. Once viewed as a laboratory artifact, species specific predation is now being reevaluated. A recent study conducted by scientists at the University of Calgary, and published in the December issue of Ecology, has shown a definitive link between cannibalism and population stabilization among flour beetles.

Researchers Hugues P. Benoit, Edward McCauley and John R. Post studied twenty-one populations of the flour beetle, Tribolium confusum, in the laboratory. Their research built on the theory that cannibalism within this species is most likely to occur between mobile and immobile life stages; adult beetles mainly consume eggs and pupae, while larvae consume eggs.

When the beetles were separated according to life stage and a fixed proportion of the various stages were removed (temporarily) from the population, the incidence of cannibalism was dramatically reduced and in some instances almost entirely eliminated. In the absence of cannibalism, the growth of the adult population approached exponential rates. When the densities of larger larvae were relatively high, cannibalism of eggs was also very high, causing a large decrease in egg numbers. This resulted in a smaller population of larvae as these eggs hatched. This smaller population did not have a large cannibalistic impact on the subsequent egg population, resulting in little mortality, and consequently a large population of larvae some time later.

"As a result the population densities of eggs and larvae will cycle up and down, out of phase with one another, through time," explained McCauley.

Conversely, when the beetles were left to their own devices and allowed to eat flour and one another freely, population numbers tended to stabilize.

Similar studies have been conducted on populations of other animals. Past research has indicated that size structured cannibalism
'"/>

Contact: Nadine Lymn
nadine@esa.org
202-416-6182
Ecological Society of America
10-Dec-1998


Page: 1 2

Related biology news :

1. Common cold virus can cause polio in mice when injected into muscles
2. Common call for action on European Research Council (ERC)
3. Common therapy for HIV associated with cervical abnormality regression
4. Common chemicals morphing into potential toxins in Arctic
5. Common worm provides insights into salmonella virulence
6. Common virus may contribute to uncommon bone disease in children
7. Common airborne substance makes asthmatics more sensitive to house dust mites: study
8. Common genetic damages in non-dividing cells lead to the creation of mutant proteins
9. Common nutrients fed to pregnant mice altered their offsprings coat color
10. Common treatment for depression is safe and effective for Alzheimers patients
11. Common gene variant increases risk of atherosclerosis

Post Your Comments:
(Date:10/31/2014)... air out of a nagging mystery about the development of ... to why animal species didn,t flourish sooner, once sufficient oxygen ... end of the Proterozoic period, about 800 million years ago ... most researchers think there also was plenty of oxygen? , ... all. , In a study published Oct. 30 in ...
(Date:10/31/2014)... against Ebola one important hurdle has just been cleared ... University of North Carolina at Chapel Hill and colleagues ... can be infected with Ebola and display symptoms similar ... the current issue of Science , will significantly ... are desperately needed to curb the worldwide public health ...
(Date:10/31/2014)... his team have been studying the behavior of ... Alps for years. They observed that ravens slowly ... and playing. However, they also observed that these ... individual. Although in about 50 % of the ... the two affiliating ravens, intervening can be potentially ...
Breaking Biology News(10 mins):Lack of oxygen delayed the rise of animals on Earth 2Improved mouse model will accelerate research on potential Ebola vaccines, treatments 2
(Date:10/30/2014)... 2014 Deep Research Report on Global ... and in-depth research report on the China Naltrexone ... including its definition, classification, application, and industry chain ... covers the international market analysis, including China’s domestic ... macroeconomic environment & economic situation analysis. The report ...
(Date:10/30/2014)... SoundConnect , an industry leading ... end users the key to turning this already ... adding voice enablement and hybrid audio conferencing. , ... communication tool that includes presence, instant messaging and ... becomes a comprehensive unified communications solution. Adding the ...
(Date:10/30/2014)... MA (PRWEB) October 30, 2014 James Sherley ... advance in adult tissue stem cell technology since his days ... (FCCC) in Philadelphia in the late 1990’s. Sherley founded ... The company holds all the intellectual property developed in ... professor at the Massachusetts Institute of Technology (MIT), and more ...
(Date:10/30/2014)... Whitehouse Laboratories has formally announced a ... and Package Test Capacity. Responding to growing demands from ... increase in environmental chamber storage space that will enable ... samples to be securely held on site at Whitehouse ... has already taken place with the recent completion of ...
Breaking Biology Technology:Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 2Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 3SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 2Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 4Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 2Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 3
Cached News: