The Role of Colony Size on Tunnel Branching Morphogenesis in Ant Nests
Identifieur interne : 001F18 ( Ncbi/Merge ); précédent : 001F17; suivant : 001F19The Role of Colony Size on Tunnel Branching Morphogenesis in Ant Nests
Auteurs : Jacques Gautrais [France] ; Jérôme Buhl [Australie] ; Sergi Valverde [Espagne] ; Pascale Kuntz [France] ; Guy Theraulaz [France]Source :
- PLoS ONE [ 1932-6203 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- physiology : Morphogenesis.
- Animals, Ants, Nesting Behavior, Nonlinear Dynamics, Population Density, Psychology, Social, Social Behavior.
Abstract
Many ant species excavate nests that are made up of chambers and interconnecting tunnels. There is a general trend of an increase in nest complexity with increasing population size. This complexity reflects a higher ramification and anastomosis of tunnels that can be estimated by the meshedness coefficient of the tunnelling networks. It has long been observed that meshedness increases with colony size within and across species, but no explanation has been provided so far. Since colony size is a strong factor controlling collective digging, a high value of the meshedness could simply be a side effect of a larger number of workers. To test this hypothesis, we study the digging dynamics in different group size of ants
Url:
DOI: 10.1371/journal.pone.0109436
PubMed: 25330080
PubMed Central: 4198125
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<term>Ants</term>
<term>Nesting Behavior</term>
<term>Nonlinear Dynamics</term>
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<front><div type="abstract" xml:lang="en"><p>Many ant species excavate nests that are made up of chambers and interconnecting tunnels. There is a general trend of an increase in nest complexity with increasing population size. This complexity reflects a higher ramification and anastomosis of tunnels that can be estimated by the meshedness coefficient of the tunnelling networks. It has long been observed that meshedness increases with colony size within and across species, but no explanation has been provided so far. Since colony size is a strong factor controlling collective digging, a high value of the meshedness could simply be a side effect of a larger number of workers. To test this hypothesis, we study the digging dynamics in different group size of ants <italic>Messor sancta</italic>
. We build a model of collective digging that is calibrated from the experimental data. Model's predictions successfully reproduce the topological properties of tunnelling networks observed in experiments, including the increase of the meshedness with group size. We then use the model to investigate situations in which collective digging progresses outward from a centre corresponding to the way tunnelling behaviour occurs in field conditions. Our model predicts that, when all other parameters are kept constant, an increase of the number of workers leads to a higher value of the meshedness and a transition from tree-like structures to highly meshed networks. Therefore we conclude that colony size is a key factor determining tunnelling network complexity in ant colonies.</p>
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<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
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<settlement type="city">Toulouse</settlement>
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<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
<region type="old region">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
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<author><name sortKey="Buhl, Jerome" sort="Buhl, Jerome" uniqKey="Buhl J" first="Jérôme" last="Buhl">Jérôme Buhl</name>
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</nlm:aff>
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<wicri:noRegion>Adelaide</wicri:noRegion>
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<author><name sortKey="Valverde, Sergi" sort="Valverde, Sergi" uniqKey="Valverde S" first="Sergi" last="Valverde">Sergi Valverde</name>
<affiliation wicri:level="3"><nlm:aff id="aff4"><addr-line>Complex Systems Laboratory (ICREA-UPF), Barcelona, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Complex Systems Laboratory (ICREA-UPF), Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
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</affiliation>
<affiliation wicri:level="3"><nlm:aff id="aff5"><addr-line>Institut de Biologia Evolutiva (CSIC-UPF), Barcelona, Spain</addr-line>
</nlm:aff>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Institut de Biologia Evolutiva (CSIC-UPF), Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
</placeName>
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<author><name sortKey="Kuntz, Pascale" sort="Kuntz, Pascale" uniqKey="Kuntz P" first="Pascale" last="Kuntz">Pascale Kuntz</name>
<affiliation wicri:level="3"><nlm:aff id="aff6"><addr-line>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes, France</addr-line>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes</wicri:regionArea>
<placeName><region type="region">Pays de la Loire</region>
<region type="old region">Pays de la Loire</region>
<settlement type="city">Nantes</settlement>
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<author><name sortKey="Theraulaz, Guy" sort="Theraulaz, Guy" uniqKey="Theraulaz G" first="Guy" last="Theraulaz">Guy Theraulaz</name>
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</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
<region type="old region">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="3"><nlm:aff id="aff2"><addr-line>Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse, France</addr-line>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
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<series><title level="j">PLoS ONE</title>
<idno type="eISSN">1932-6203</idno>
<imprint><date when="2014">2014</date>
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<front><div type="abstract" xml:lang="en"><p>Many ant species excavate nests that are made up of chambers and interconnecting tunnels. There is a general trend of an increase in nest complexity with increasing population size. This complexity reflects a higher ramification and anastomosis of tunnels that can be estimated by the meshedness coefficient of the tunnelling networks. It has long been observed that meshedness increases with colony size within and across species, but no explanation has been provided so far. Since colony size is a strong factor controlling collective digging, a high value of the meshedness could simply be a side effect of a larger number of workers. To test this hypothesis, we study the digging dynamics in different group size of ants <italic>Messor sancta</italic>
. We build a model of collective digging that is calibrated from the experimental data. Model's predictions successfully reproduce the topological properties of tunnelling networks observed in experiments, including the increase of the meshedness with group size. We then use the model to investigate situations in which collective digging progresses outward from a centre corresponding to the way tunnelling behaviour occurs in field conditions. Our model predicts that, when all other parameters are kept constant, an increase of the number of workers leads to a higher value of the meshedness and a transition from tree-like structures to highly meshed networks. Therefore we conclude that colony size is a key factor determining tunnelling network complexity in ant colonies.</p>
</div>
</front>
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<pubmed><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The role of colony size on tunnel branching morphogenesis in ant nests.</title>
<author><name sortKey="Gautrais, Jacques" sort="Gautrais, Jacques" uniqKey="Gautrais J" first="Jacques" last="Gautrais">Jacques Gautrais</name>
<affiliation wicri:level="3"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
<region type="old region">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
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</affiliation>
</author>
<author><name sortKey="Buhl, Jerome" sort="Buhl, Jerome" uniqKey="Buhl J" first="Jérôme" last="Buhl">Jérôme Buhl</name>
<affiliation wicri:level="1"><nlm:affiliation>School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia.</nlm:affiliation>
<country xml:lang="fr">Australie</country>
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<wicri:noRegion>Adelaide</wicri:noRegion>
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<author><name sortKey="Valverde, Sergi" sort="Valverde, Sergi" uniqKey="Valverde S" first="Sergi" last="Valverde">Sergi Valverde</name>
<affiliation wicri:level="3"><nlm:affiliation>Complex Systems Laboratory (ICREA-UPF), Barcelona, Spain; Institut de Biologia Evolutiva (CSIC-UPF), Barcelona, Spain.</nlm:affiliation>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Complex Systems Laboratory (ICREA-UPF), Barcelona, Spain; Institut de Biologia Evolutiva (CSIC-UPF), Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
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</author>
<author><name sortKey="Kuntz, Pascale" sort="Kuntz, Pascale" uniqKey="Kuntz P" first="Pascale" last="Kuntz">Pascale Kuntz</name>
<affiliation wicri:level="3"><nlm:affiliation>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes</wicri:regionArea>
<placeName><region type="region">Pays de la Loire</region>
<region type="old region">Pays de la Loire</region>
<settlement type="city">Nantes</settlement>
</placeName>
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</author>
<author><name sortKey="Theraulaz, Guy" sort="Theraulaz, Guy" uniqKey="Theraulaz G" first="Guy" last="Theraulaz">Guy Theraulaz</name>
<affiliation wicri:level="3"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">The role of colony size on tunnel branching morphogenesis in ant nests.</title>
<author><name sortKey="Gautrais, Jacques" sort="Gautrais, Jacques" uniqKey="Gautrais J" first="Jacques" last="Gautrais">Jacques Gautrais</name>
<affiliation wicri:level="3"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse</wicri:regionArea>
<placeName><region type="region">Occitanie (région administrative)</region>
<region type="old region">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Buhl, Jerome" sort="Buhl, Jerome" uniqKey="Buhl J" first="Jérôme" last="Buhl">Jérôme Buhl</name>
<affiliation wicri:level="1"><nlm:affiliation>School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, Australia.</nlm:affiliation>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>School of Agriculture, Food and Wine, The University of Adelaide, Adelaide</wicri:regionArea>
<wicri:noRegion>Adelaide</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Valverde, Sergi" sort="Valverde, Sergi" uniqKey="Valverde S" first="Sergi" last="Valverde">Sergi Valverde</name>
<affiliation wicri:level="3"><nlm:affiliation>Complex Systems Laboratory (ICREA-UPF), Barcelona, Spain; Institut de Biologia Evolutiva (CSIC-UPF), Barcelona, Spain.</nlm:affiliation>
<country xml:lang="fr">Espagne</country>
<wicri:regionArea>Complex Systems Laboratory (ICREA-UPF), Barcelona, Spain; Institut de Biologia Evolutiva (CSIC-UPF), Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Kuntz, Pascale" sort="Kuntz, Pascale" uniqKey="Kuntz P" first="Pascale" last="Kuntz">Pascale Kuntz</name>
<affiliation wicri:level="3"><nlm:affiliation>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire d'Informatique de Nantes-Atlantique, Polytech'Nantes, Nantes</wicri:regionArea>
<placeName><region type="region">Pays de la Loire</region>
<region type="old region">Pays de la Loire</region>
<settlement type="city">Nantes</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Theraulaz, Guy" sort="Theraulaz, Guy" uniqKey="Theraulaz G" first="Guy" last="Theraulaz">Guy Theraulaz</name>
<affiliation wicri:level="3"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Centre de Recherches sur la Cognition Animale, Université de Toulouse, Toulouse, France; Centre de Recherches sur la Cognition Animale, Centre National de la Recherche Scientifique UMR5169, Toulouse</wicri:regionArea>
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<region type="old region">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
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<series><title level="j">PloS one</title>
<idno type="eISSN">1932-6203</idno>
<imprint><date when="2014" type="published">2014</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term>
<term>Ants</term>
<term>Morphogenesis (physiology)</term>
<term>Nesting Behavior</term>
<term>Nonlinear Dynamics</term>
<term>Population Density</term>
<term>Psychology, Social</term>
<term>Social Behavior</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Animaux</term>
<term>Comportement de nidification</term>
<term>Comportement social</term>
<term>Densité de population</term>
<term>Dynamique non linéaire</term>
<term>Fourmis</term>
<term>Morphogenèse (physiologie)</term>
<term>Psychologie sociale</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Morphogenèse</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Morphogenesis</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Animals</term>
<term>Ants</term>
<term>Nesting Behavior</term>
<term>Nonlinear Dynamics</term>
<term>Population Density</term>
<term>Psychology, Social</term>
<term>Social Behavior</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Animaux</term>
<term>Comportement de nidification</term>
<term>Comportement social</term>
<term>Densité de population</term>
<term>Dynamique non linéaire</term>
<term>Fourmis</term>
<term>Psychologie sociale</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Many ant species excavate nests that are made up of chambers and interconnecting tunnels. There is a general trend of an increase in nest complexity with increasing population size. This complexity reflects a higher ramification and anastomosis of tunnels that can be estimated by the meshedness coefficient of the tunnelling networks. It has long been observed that meshedness increases with colony size within and across species, but no explanation has been provided so far. Since colony size is a strong factor controlling collective digging, a high value of the meshedness could simply be a side effect of a larger number of workers. To test this hypothesis, we study the digging dynamics in different group size of ants Messor sancta. We build a model of collective digging that is calibrated from the experimental data. Model's predictions successfully reproduce the topological properties of tunnelling networks observed in experiments, including the increase of the meshedness with group size. We then use the model to investigate situations in which collective digging progresses outward from a centre corresponding to the way tunnelling behaviour occurs in field conditions. Our model predicts that, when all other parameters are kept constant, an increase of the number of workers leads to a higher value of the meshedness and a transition from tree-like structures to highly meshed networks. Therefore we conclude that colony size is a key factor determining tunnelling network complexity in ant colonies.</div>
</front>
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