Navigation Links
What's bugging locusts?
Date:5/8/2008

Since ancient times, locust plagues have been viewed as one of the most spectacular events in nature. In seemingly spontaneous fashion, as many as 10 billion critters can suddenly swarm the air and carpet the ground, blazing destructive paths that bring starvation and economic ruin.

What makes them do it?

A team of scientists led by Iain Couzin of Princeton University and including colleagues at the University of Oxford and the University of Sydney believes it may finally have an answer to this enduring mystery.

"Cannibalism," said Couzin, an assistant professor of ecology and evolutionary biology at Princeton.

Writing in the May 8 online edition of Current Biology, Couzin and colleagues say that the collective motion of locusts is driven by "cannibalistic interactions."

"Cannibalism is rife within marching bands of locusts," said Couzin. Desert locusts usually feed on vegetation, but individual locusts have been observed to feed on other live locusts or cadavers. This behavior and its effect upon the group, however, have not previously been studied.

"No one knew until now that cannibalistic interactions are directly responsible for the collective motion exhibited by these bands," added Couzin, whose graduate student, Sepideh Bazazi, is the lead author on the paper.

In zoology, cannibalism is defined as occurring when any species consumes members of its own kind.

Young locusts are pressed to eat others when the food supply necessary for supporting the population starts to dwindle. Starved for essential nutrients such as protein and salt, young locust "nymphs" will nip at each other. Those under siege react by running from the aggressors. Others get jittery and simply seek to put space between them and any locust approaching from behind. That's how one aggressive interaction can lead to another and collectively start a vast migration, Couzin said.

And the activity intensifies, as t
'/>"/>

Contact: Kitta MacPherson
kittamac@princeton.edu
609-258-5729
Princeton University
Source:Eurekalert

Page: 1 2

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... connectors, designed by an international standards process, will be ... to an invited review published in the OnlineFirst version ... ), the official journal of the American Society for ... greatly reduce the occurrence of misconnection that can be ... which are used to join medical devices, components, and ...
(Date:8/21/2014)... University (ANU) team has successfully replicated one of the ... systems powered by sunlight which could manufacture hydrogen as ... sunlight. It is an exciting prospect to use them ... said Dr Kastoori Hingorani, from the ARC Centre of ... of Biology. , Hydrogen offers potential as a zero-carbon ...
(Date:8/21/2014)... pancreatitis involves the pancreas digesting itself resulting in severe ... the UK around 20,000 patients are diagnosed with the ... cure and treatment is restricted to intravenous fluid and ... Faculty of Life Sciences, who led the research, said ... from gall stones and excessive alcohol intake combined with ...
Breaking Biology News(10 mins):New feeding tube connectors will improve patient safety 2Water and sunlight the formula for sustainable fuel 2Insulin offers new hope for the treatment of acute pancreatitis 2
... has on learning in ground squirrels could have an ... to a University of Chicago researcher. Jill Mateo, ... when they perform normal survival tasks, ground squirrels learn ... cortisol, a hormone produced in response to stress, than ...
... "strength in numbers" more apparent than in the collective ... -- which number about 5 million trillion trillion strong ... affect virtually every ecological process, from the decay of ... even though microbes essentially rule the Earth, scientists have ...
... on Earth may have gotten generous helpings from outer ... Carnegie Institution have discovered concentrations of amino acids in ... than levels previously measured in other similar meteorites. This ... richer in the organic building blocks of life than ...
Cached Biology News:Research with squirrels provides clues on hormone's role in human learning 2New window opens on the secret life of microbes 2Meteorites a rich source for primordial soup 2
(Date:8/21/2014)... 21, 2014 His Majesty Willem-Alexander, King ... The Court of His Majesty Willem-Alexander, King of the ... Grand Opening of POET-DSM Advanced Biofuels’ Project LIBERTY cellulosic ... , The King will take part in the Grand ... for 11 a.m.-12:20 p.m. and tour the plant. POET-DSM ...
(Date:8/21/2014)...  Decision Resources Group finds that the asthma ... Mexico currently faces severe ... agents, the anticipated label extension of Boehringer Ingelheim/Pfizer,s ... emerging biologics will substantially increase the competitiveness of ... inhibitors will introduce a new dynamic to the severe, ...
(Date:8/21/2014)... Aug. 21, 2014  China Cord Blood Corporation (NYSE: ... to release financial results for the first quarter of ... market close in the US.  The ... ET on Friday, August 29, 2014 to discuss its ... Company,s recent developments, followed by a question and answer ...
(Date:8/21/2014)... Sofia, Bulgaria (PRWEB) August 21, 2014 ... was released today by Ontotext . Now ... and semantic analysis of structured and unstructured data is ... of the cost of enterprise technology. Organizations that do ... approaches for data management can use S4 since there ...
Breaking Biology Technology:His Majesty Willem-Alexander, King of the Netherlands, to Attend Project LIBERTY opening 2His Majesty Willem-Alexander, King of the Netherlands, to Attend Project LIBERTY opening 3Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 2Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 3China Cord Blood Corporation to Report First Quarter of Fiscal 2015 Financial Results 2Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 2Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 3Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 4
... which manages the 10th largest U.S. pension fund for public employees, ... up to $50 million into state venture capital funds. , ,The ... II and Venture Investors Early Stage Fund IV. , ... between the two in 2000. It followed that with $90 million ...
... meeting last week to name its leadership. The group ... , ,Tom Hefty, former co-chairman of the Governor's Economic ... He is now with law firm Reinhart, Boerner and ... the UW-Madison College of Engineering , was made ...
... chief information officers made the Computerworld magazine's top-100 list this ... Modine Manufacturing Co. , in Racine. Modine specializes in thermal ... in London and a carbon-dioxide-cooled Jeep, and has been active ... and CIO of ShopKo Stores Inc. , in Green ...
Cached Biology Technology:
poliovirus receptor-related 2 (herpesvirus entry mediator B), mRNA...
...
CREB-2 (H-290)...
Immunogen: Recombinant full length protein, corresponding to amino acids 1-435 of Human AP2M1. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Biology Products: