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:3/4/2015)... , Mar. 04, 2015 Research and Markets ... addition of the "Global Biometrics Market Forecast ... The market for biometric authentication systems ... around 14% till 2020 The driving ... increasing security needs, government projects and constant development ...
(Date:2/25/2015)... 25, 2015  ABC Financial Services (ABC), the ... Health and Fitness Industry, today announced enhancements to ... The latest upgrade includes advances to the agreement ... check-in via Identity One fingerprint biometrics. The features ... interactive displays at the International Health, Racquet & ...
(Date:2/19/2015)... 2015 Research and Markets ( ... "Military Electro-Optical / Infrared Systems Market by ... - Forecast to 2020" report to their ... market is expected to reach $16.35 billion by ... This report segments the military electro-optical/infrared systems ...
Breaking Biology News(10 mins):Global Biometrics Market Forecast and Opportunities, 2020 2Global Biometrics Market Forecast and Opportunities, 2020 3ABC Financial Unveils New Software Enhancements 2ABC Financial Unveils New Software Enhancements 3Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 2Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 3
(Date:3/5/2015)... 05, 2015 North Carolina-based life ... M.D., Professor of Medicine, Mayo Clinic College of ... of Directors. , Entegrion’s Executive Chairman ... to have Dr. Noel, a distinguished physician and ... join Entegrion’s Board. His expertise in hematology and ...
(Date:3/5/2015)... 2015  UBM Medica US announces that ... community to help oncologists and other clinicians gain ... regarding the use of targeted therapies and immunotherapies, ... March is National Kidney Cancer Awareness Month ... treatment options for renal cell carcinoma (RCC) patients. ...
(Date:3/5/2015)... -- In response to the incorrect assertions by LD, distributed ... on February 12, 2015. Impeto Medical SAS and its ... their SUDOSCAN® devices have been proven to provide accurate ... have the courts decide this dispute rather than the ... written by Key Opinion Leaders, published by significant peer-reviewed ...
(Date:3/5/2015)... Cleveleys (UK) (PRWEB) March 05, 2015 ... implantable polymer have received the CE mark (European) approval. ... the European Free Trade Association (EFTA) and the European ... mark has now been granted to implants supplied by ... disc spinal conditions. , Osimplant's Cervical Expandable Bladed ...
Breaking Biology Technology:Entegrion Announces Appointment of Pierre Noel, MD, to Its Board of Directors 2OncoTherapy Network Highlights Kidney Cancer Awareness Month 2OncoTherapy Network Highlights Kidney Cancer Awareness Month 3Impeto Medical Responds to Published Allegations by LD Technology LLC ("LD") 2Invibio’s PEEK-OPTIMA® HA Enhanced Gains Momentum: New Implant Receives European Approval 2Invibio’s PEEK-OPTIMA® HA Enhanced Gains Momentum: New Implant Receives European Approval 3
Cached News: