The social context of cannibalism in migratory bands of the Mormon cricket.

Cannibalism has been shown to be important to the collective motion of mass migratory bands of insects, such as locusts and Mormon crickets. These mobile groups consist of millions of individuals and are highly destructive to vegetation. Individuals move in response to attacks from approaching consp...

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Autores principales:	Sepideh Bazazi, Christos C Ioannou, Stephen J Simpson, Gregory A Sword, Colin J Torney, Patrick D Lorch, Iain D Couzin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0e7791d4151d4f1e82d27747c1a1dec3
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spelling	oai:doaj.org-article:0e7791d4151d4f1e82d27747c1a1dec32021-11-18T07:01:45ZThe social context of cannibalism in migratory bands of the Mormon cricket.1932-620310.1371/journal.pone.0015118https://doaj.org/article/0e7791d4151d4f1e82d27747c1a1dec32010-12-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21179402/?tool=EBIhttps://doaj.org/toc/1932-6203Cannibalism has been shown to be important to the collective motion of mass migratory bands of insects, such as locusts and Mormon crickets. These mobile groups consist of millions of individuals and are highly destructive to vegetation. Individuals move in response to attacks from approaching conspecifics and bite those ahead, resulting in further movement and encounters with others. Despite the importance of cannibalism, the way in which individuals make attack decisions and how the social context affects these cannibalistic interactions is unknown. This can be understood by examining the decisions made by individuals in response to others. We performed a field investigation which shows that adult Mormon crickets were more likely to approach and attack a stationary cricket that was side-on to the flow than either head- or abdomen-on, suggesting that individuals could reduce their risk of an attack by aligning with neighbours. We found strong social effects on cannibalistic behaviour: encounters lasted longer, were more likely to result in an attack, and attacks were more likely to be successful if other individuals were present around a stationary individual. This local aggregation appears to be driven by positive feedback whereby the presence of individuals attracts others, which can lead to further crowding. This work improves our understanding of the local social dynamics driving migratory band formation, maintenance and movement at the population level.Sepideh BazaziChristos C IoannouStephen J SimpsonGregory A SwordColin J TorneyPatrick D LorchIain D CouzinPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 12, p e15118 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sepideh Bazazi Christos C Ioannou Stephen J Simpson Gregory A Sword Colin J Torney Patrick D Lorch Iain D Couzin The social context of cannibalism in migratory bands of the Mormon cricket.
description	Cannibalism has been shown to be important to the collective motion of mass migratory bands of insects, such as locusts and Mormon crickets. These mobile groups consist of millions of individuals and are highly destructive to vegetation. Individuals move in response to attacks from approaching conspecifics and bite those ahead, resulting in further movement and encounters with others. Despite the importance of cannibalism, the way in which individuals make attack decisions and how the social context affects these cannibalistic interactions is unknown. This can be understood by examining the decisions made by individuals in response to others. We performed a field investigation which shows that adult Mormon crickets were more likely to approach and attack a stationary cricket that was side-on to the flow than either head- or abdomen-on, suggesting that individuals could reduce their risk of an attack by aligning with neighbours. We found strong social effects on cannibalistic behaviour: encounters lasted longer, were more likely to result in an attack, and attacks were more likely to be successful if other individuals were present around a stationary individual. This local aggregation appears to be driven by positive feedback whereby the presence of individuals attracts others, which can lead to further crowding. This work improves our understanding of the local social dynamics driving migratory band formation, maintenance and movement at the population level.
format	article
author	Sepideh Bazazi Christos C Ioannou Stephen J Simpson Gregory A Sword Colin J Torney Patrick D Lorch Iain D Couzin
author_facet	Sepideh Bazazi Christos C Ioannou Stephen J Simpson Gregory A Sword Colin J Torney Patrick D Lorch Iain D Couzin
author_sort	Sepideh Bazazi
title	The social context of cannibalism in migratory bands of the Mormon cricket.
title_short	The social context of cannibalism in migratory bands of the Mormon cricket.
title_full	The social context of cannibalism in migratory bands of the Mormon cricket.
title_fullStr	The social context of cannibalism in migratory bands of the Mormon cricket.
title_full_unstemmed	The social context of cannibalism in migratory bands of the Mormon cricket.
title_sort	social context of cannibalism in migratory bands of the mormon cricket.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/0e7791d4151d4f1e82d27747c1a1dec3
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The social context of cannibalism in migratory bands of the Mormon cricket.

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