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Identifying the link between these components remains a challenge for movement ecology and is important in understanding the mechanisms driving both individual and collective motion. One accessible way of examining how internal state influences an individual's motion is to consider the nutritional state of an animal. Our experimental results reveal that nutritional state exerts a relatively minor influence on the motion of isolated individuals, but large group-level differences emerge from diet affecting inter-individual interactions. This supports the idea that mass movement in locusts may be driven by cannibalism. To estimate how these findings are likely to impact collective migration of locust hopper bands, we create an experimentally parametrized model of locust interactions and motion. Our model supports our hypothesis that nutrient-dependent social interactions can lead to the collective motion seen in our experiments and predicts a transition in the mean speed and the degree of coordination of bands with increasing insect density. Furthermore, increasing the interaction strength (representing greater protein deprivation) dramatically reduces the critical density at which this transition occurs, demonstrating that individuals' nutritional state could have a major impact on large-scale migration.<\/jats:p>","DOI":"10.1098\/rspb.2010.1447","type":"journal-article","created":{"date-parts":[[2010,8,26]],"date-time":"2010-08-26T00:36:27Z","timestamp":1282782987000},"page":"356-363","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":94,"title":["Nutritional state and collective motion: from individuals to mass migration"],"prefix":"10.1098","volume":"278","author":[{"given":"Sepideh","family":"Bazazi","sequence":"first","affiliation":[{"name":"Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pawel","family":"Romanczuk","sequence":"additional","affiliation":[{"name":"Department of Physics, Humboldt University Berlin, Newtonstrasse 15, 12489 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sian","family":"Thomas","sequence":"additional","affiliation":[{"name":"Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lutz","family":"Schimansky-Geier","sequence":"additional","affiliation":[{"name":"Department of Physics, Humboldt University Berlin, Newtonstrasse 15, 12489 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph J.","family":"Hale","sequence":"additional","affiliation":[{"name":"Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriel A.","family":"Miller","sequence":"additional","affiliation":[{"name":"Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory A.","family":"Sword","sequence":"additional","affiliation":[{"name":"School of Biological Sciences, The University of Sydney, Heydon-Laurence Building A08, Sydney, NSW 2006, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen J.","family":"Simpson","sequence":"additional","affiliation":[{"name":"School of Biological Sciences, The University of Sydney, Heydon-Laurence Building A08, Sydney, NSW 2006, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iain D.","family":"Couzin","sequence":"additional","affiliation":[{"name":"Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2010,8,25]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/445715a"},{"key":"e_1_3_2_3_2","first-page":"1375","article-title":"Spontaneously ordered motion of self-propelled particles","volume":"30","author":"Czirok A.","year":"1997","journal-title":"J. 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