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:
*Name:
*Comment:
*Email:


(Date:2/8/2017)... About Voice Recognition Biometrics Voice recognition biometrics ... a stored voiceprint template. Acoustic features of an ... are compared to distinguish between individual voices. Voice ... PCs already have a microphone and can authenticate ... are most likely to be deployed in telephone-based ...
(Date:2/8/2017)... 2017 The biometrics market has reached ... of organizations, desires to better authenticate or identify ... and challenge questions), biometrics is quickly working its ... market is driven by use cases, though there ... enterprise uses cases, with consumer-facing use cases encompassing ...
(Date:2/7/2017)... , Feb. 7, 2017 Zimmer Biomet Holdings, ... musculoskeletal healthcare, will present at the LEERINK Partners 6th ... Palace Hotel on Wednesday, February 15, 2017 at 10 ... of the presentation can be accessed at http://wsw.com/webcast/leerink28/zbh ... the conference via Zimmer Biomet,s Investor Relations website at ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... and NEW YORK , Feb. ... Lumeon , a leading digital health company, and ... provider of telemedicine and remote patient monitoring, announce ... telemedicine reimbursements.  DN Telehealth maximizes ... in real-time, extending consultations beyond a physical clinical ...
(Date:2/23/2017)... , Feb. 23, 2017  MIODx announced today ... two key immunotherapy technologies from the University of ... a method to monitor a patient for response ... and CTLA-4.  The second license extends the technology ... is likely to have an immune-related adverse event ...
(Date:2/23/2017)... ... February 23, 2017 , ... Brain Sentinel, ... begin marketing the SPEAC® System, the Brain Sentinel® Seizure Monitoring and Alerting System. ... healthcare facilities during periods of rest. A lightweight, non-invasive monitor is placed on ...
(Date:2/23/2017)... Winston-Salem, NC (PRWEB) , ... February 23, 2017 , ... ... pleased to announce a new partnership with Compass Research . GGI's mission is ... gifting a vaccine to a child in need in honor of each clinical trial ...
Breaking Biology Technology:
Cached News: