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:6/16/2015)... 16, 2015 /CNW Telbec/ - handyem Inc. and ... the incorporation of handyem,s HPC-150 portable flow cytometer ... Mo-POD™. This unprecedented model of mobile laboratory platform ... the Pennsylvania Convention Center, ... th to 18 th 2015.  By ...
(Date:6/15/2015)... NEW YORK , June 15, 2015 ... released today from Telstra reveals the majority of US consumers ... recognise them via biometrics, such as fingerprint and voiceprint, instead ... usernames. According to Telstra,s " Mobile Identity   ... " report, with smartphones now the primary channel ...
(Date:6/9/2015)...   MedNet Solutions , an innovative SaaS-based eClinical ... research, will be providing demonstrations of its ... Drug Information Association (DIA) Annual Meeting in ... will include previews of many exciting new enhancements that ... iMedNet 2015 Feature 1 Release. ...
Breaking Biology News(10 mins):handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 2handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 3One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 2One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 3One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 4MedNet To Provide Sneak Peeks Of Its iMedNet "2015 Feature 1 Release" At The DIA Annual Meeting 2MedNet To Provide Sneak Peeks Of Its iMedNet "2015 Feature 1 Release" At The DIA Annual Meeting 3
(Date:7/1/2015)... DE (PRWEB) , ... July 01, 2015 , ... A ... develop new ideas to lower the barriers to innovation in life sciences R&D. The ... up to two cash prizes of US$15,000 and a period of expert mentorship from ...
(Date:7/1/2015)... NEW YORK , July 1, 2015 /PRNewswire/ ... G ), a global leader in designing, ... the Aecus Innovation Award in recognition of their ... operational efficiencies in UCB,s global business services (GBS) ... acknowledge service providers and clients that work together ...
(Date:6/30/2015)... ... June 30, 2015 , ... Park Systems , ... scientific research into new classes of Nanoscale Graphene-based materials poised to revolutionize industries ... wonder material of the 21st Century' by the researchers who were awarded the ...
(Date:6/30/2015)... ... June 30, 2015 , ... uBiome and OpenBiome ... on mechanics of fecal microbiota transplantation in C. difficile patients. , SAN FRANCISCO, ... patients undergoing fecal microbiota transplantation (FMT) as a treatment for Clostridium difficile infections ...
Breaking Biology Technology:Pistoia Alliance Launches Startup Challenge 2Pistoia Alliance Launches Startup Challenge 3UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 3UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 4UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 5How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 2How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 3How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 4uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 2uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 3
Cached News: