Lifespan behavioural and neural resilience in a social insect
Identifieur interne : 002F54 ( Ncbi/Merge ); précédent : 002F53; suivant : 002F55Lifespan behavioural and neural resilience in a social insect
Auteurs : Ysabel Milton Giraldo [États-Unis] ; J. Frances Kamhi [États-Unis] ; Vincent Fourcassié [France] ; Mathieu Moreau [France] ; Simon K. A. Robson [Australie] ; Adina Rusakov [États-Unis] ; Lindsey Wimberly [États-Unis] ; Alexandria Diloreto [États-Unis] ; Adrianna Kordek [États-Unis] ; James F. A. Traniello [États-Unis]Source :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- cytologie : Encéphale.
- métabolisme : Dopamine, Sérotonine.
- physiologie : Corps pédonculés, Encéphale, Fourmis.
- Animaux, Apoptose, Comportement animal, Comportement social, Longévité, Vieillissement.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Dopamine, Serotonin.
- cytology : Brain.
- physiology : Ants, Brain, Mushroom Bodies.
- Aging, Animals, Apoptosis, Behavior, Animal, Longevity, Social Behavior.
Abstract
Analyses of senescence in social species are important to understanding how group living influences the evolution of ageing in society members. Social insects exhibit remarkable lifespan polyphenisms and division of labour, presenting excellent opportunities to test hypotheses concerning ageing and behaviour. Senescence patterns in other taxa suggest that behavioural performance in ageing workers would decrease in association with declining brain functions. Using the ant
Url:
DOI: 10.1098/rspb.2015.2603
PubMed: 26740614
PubMed Central: 4721105
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PMC:4721105Le document en format XML
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<term>Brain (physiology)</term>
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<term>Dopamine (métabolisme)</term>
<term>Encéphale (cytologie)</term>
<term>Encéphale (physiologie)</term>
<term>Fourmis (physiologie)</term>
<term>Longévité</term>
<term>Sérotonine (métabolisme)</term>
<term>Vieillissement</term>
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<front><div type="abstract" xml:lang="en"><p>Analyses of senescence in social species are important to understanding how group living influences the evolution of ageing in society members. Social insects exhibit remarkable lifespan polyphenisms and division of labour, presenting excellent opportunities to test hypotheses concerning ageing and behaviour. Senescence patterns in other taxa suggest that behavioural performance in ageing workers would decrease in association with declining brain functions. Using the ant <italic>Pheidole dentata</italic>
as a model, we found that 120-day-old minor workers, having completed 86% of their laboratory lifespan, showed no decrease in sensorimotor functions underscoring complex tasks such as alloparenting and foraging. Collaterally, we found no age-associated increases in apoptosis in functionally specialized brain compartments or decreases in synaptic densities in the mushroom bodies, regions associated with integrative processing. Furthermore, brain titres of serotonin and dopamine—neuromodulators that could negatively impact behaviour through age-related declines—increased in old workers. Unimpaired task performance appears to be based on the maintenance of brain functions supporting olfaction and motor coordination independent of age. Our study is the first to comprehensively assess lifespan task performance and its neurobiological correlates and identify constancy in behavioural performance and the absence of significant age-related neural declines.</p>
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<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Rusakov, Adina" sort="Rusakov, Adina" uniqKey="Rusakov A" first="Adina" last="Rusakov">Adina Rusakov</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Wimberly, Lindsey" sort="Wimberly, Lindsey" uniqKey="Wimberly L" first="Lindsey" last="Wimberly">Lindsey Wimberly</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Diloreto, Alexandria" sort="Diloreto, Alexandria" uniqKey="Diloreto A" first="Alexandria" last="Diloreto">Alexandria Diloreto</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kordek, Adrianna" sort="Kordek, Adrianna" uniqKey="Kordek A" first="Adrianna" last="Kordek">Adrianna Kordek</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Traniello, James F A" sort="Traniello, James F A" uniqKey="Traniello J" first="James F. A." last="Traniello">James F. A. Traniello</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">26740614</idno>
<idno type="pmc">4721105</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4721105</idno>
<idno type="RBID">PMC:4721105</idno>
<idno type="doi">10.1098/rspb.2015.2603</idno>
<date when="2016">2016</date>
<idno type="wicri:Area/Pmc/Corpus">000480</idno>
<idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000480</idno>
<idno type="wicri:Area/Pmc/Curation">000480</idno>
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<idno type="wicri:Area/Pmc/Checkpoint">000810</idno>
<idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000810</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Lifespan behavioural and neural resilience in a social insect</title>
<author><name sortKey="Giraldo, Ysabel Milton" sort="Giraldo, Ysabel Milton" uniqKey="Giraldo Y" first="Ysabel Milton" last="Giraldo">Ysabel Milton Giraldo</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kamhi, J Frances" sort="Kamhi, J Frances" uniqKey="Kamhi J" first="J. Frances" last="Kamhi">J. Frances Kamhi</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Fourcassie, Vincent" sort="Fourcassie, Vincent" uniqKey="Fourcassie V" first="Vincent" last="Fourcassié">Vincent Fourcassié</name>
<affiliation wicri:level="1"><nlm:aff id="af2"><addr-line>Research Center on Animal Cognition</addr-line>
,<institution>CNRS</institution>
,<addr-line>Toulouse 31062 Cedex 9</addr-line>
,<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="af3"><addr-line>Research Center on Animal Cognition</addr-line>
,<institution>Université de Toulouse</institution>
,<addr-line>Toulouse 31062 Cedex 9</addr-line>
,<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Moreau, Mathieu" sort="Moreau, Mathieu" uniqKey="Moreau M" first="Mathieu" last="Moreau">Mathieu Moreau</name>
<affiliation wicri:level="1"><nlm:aff id="af2"><addr-line>Research Center on Animal Cognition</addr-line>
,<institution>CNRS</institution>
,<addr-line>Toulouse 31062 Cedex 9</addr-line>
,<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="af3"><addr-line>Research Center on Animal Cognition</addr-line>
,<institution>Université de Toulouse</institution>
,<addr-line>Toulouse 31062 Cedex 9</addr-line>
,<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Robson, Simon K A" sort="Robson, Simon K A" uniqKey="Robson S" first="Simon K. A." last="Robson">Simon K. A. Robson</name>
<affiliation wicri:level="1"><nlm:aff id="af4"><addr-line>College of Marine and Environmental Science</addr-line>
,<institution>James Cook University</institution>
,<addr-line>Townsville 4811</addr-line>
,<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Rusakov, Adina" sort="Rusakov, Adina" uniqKey="Rusakov A" first="Adina" last="Rusakov">Adina Rusakov</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Wimberly, Lindsey" sort="Wimberly, Lindsey" uniqKey="Wimberly L" first="Lindsey" last="Wimberly">Lindsey Wimberly</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Diloreto, Alexandria" sort="Diloreto, Alexandria" uniqKey="Diloreto A" first="Alexandria" last="Diloreto">Alexandria Diloreto</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kordek, Adrianna" sort="Kordek, Adrianna" uniqKey="Kordek A" first="Adrianna" last="Kordek">Adrianna Kordek</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Traniello, James F A" sort="Traniello, James F A" uniqKey="Traniello J" first="James F. A." last="Traniello">James F. A. Traniello</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Department of Biology</addr-line>
,<institution>Boston University</institution>
,<addr-line>Boston, MA 02215</addr-line>
,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
</analytic>
<series><title level="j">Proceedings of the Royal Society B: Biological Sciences</title>
<idno type="ISSN">0962-8452</idno>
<idno type="eISSN">1471-2954</idno>
<imprint><date when="2016">2016</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en"><p>Analyses of senescence in social species are important to understanding how group living influences the evolution of ageing in society members. Social insects exhibit remarkable lifespan polyphenisms and division of labour, presenting excellent opportunities to test hypotheses concerning ageing and behaviour. Senescence patterns in other taxa suggest that behavioural performance in ageing workers would decrease in association with declining brain functions. Using the ant <italic>Pheidole dentata</italic>
as a model, we found that 120-day-old minor workers, having completed 86% of their laboratory lifespan, showed no decrease in sensorimotor functions underscoring complex tasks such as alloparenting and foraging. Collaterally, we found no age-associated increases in apoptosis in functionally specialized brain compartments or decreases in synaptic densities in the mushroom bodies, regions associated with integrative processing. Furthermore, brain titres of serotonin and dopamine—neuromodulators that could negatively impact behaviour through age-related declines—increased in old workers. Unimpaired task performance appears to be based on the maintenance of brain functions supporting olfaction and motor coordination independent of age. Our study is the first to comprehensively assess lifespan task performance and its neurobiological correlates and identify constancy in behavioural performance and the absence of significant age-related neural declines.</p>
</div>
</front>
</TEI>
</pmc>
<pubmed><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Lifespan behavioural and neural resilience in a social insect.</title>
<author><name sortKey="Giraldo, Ysabel Milton" sort="Giraldo, Ysabel Milton" uniqKey="Giraldo Y" first="Ysabel Milton" last="Giraldo">Ysabel Milton Giraldo</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA ygiraldo@bu.edu.</nlm:affiliation>
<country wicri:rule="url">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Kamhi, J Frances" sort="Kamhi, J Frances" uniqKey="Kamhi J" first="J Frances" last="Kamhi">J Frances Kamhi</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Fourcassie, Vincent" sort="Fourcassie, Vincent" uniqKey="Fourcassie V" first="Vincent" last="Fourcassié">Vincent Fourcassié</name>
<affiliation wicri:level="3"><nlm:affiliation>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9</wicri:regionArea>
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</placeName>
</affiliation>
</author>
<author><name sortKey="Moreau, Mathieu" sort="Moreau, Mathieu" uniqKey="Moreau M" first="Mathieu" last="Moreau">Mathieu Moreau</name>
<affiliation wicri:level="3"><nlm:affiliation>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
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</placeName>
</affiliation>
</author>
<author><name sortKey="Robson, Simon K A" sort="Robson, Simon K A" uniqKey="Robson S" first="Simon K A" last="Robson">Simon K A. Robson</name>
<affiliation wicri:level="1"><nlm:affiliation>College of Marine and Environmental Science, James Cook University, Townsville 4811, Australia.</nlm:affiliation>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>College of Marine and Environmental Science, James Cook University, Townsville 4811</wicri:regionArea>
<wicri:noRegion>Townsville 4811</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Rusakov, Adina" sort="Rusakov, Adina" uniqKey="Rusakov A" first="Adina" last="Rusakov">Adina Rusakov</name>
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<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Wimberly, Lindsey" sort="Wimberly, Lindsey" uniqKey="Wimberly L" first="Lindsey" last="Wimberly">Lindsey Wimberly</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Diloreto, Alexandria" sort="Diloreto, Alexandria" uniqKey="Diloreto A" first="Alexandria" last="Diloreto">Alexandria Diloreto</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Kordek, Adrianna" sort="Kordek, Adrianna" uniqKey="Kordek A" first="Adrianna" last="Kordek">Adrianna Kordek</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Traniello, James F A" sort="Traniello, James F A" uniqKey="Traniello J" first="James F A" last="Traniello">James F A. Traniello</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PubMed</idno>
<date when="2016">2016</date>
<idno type="RBID">pubmed:26740614</idno>
<idno type="pmid">26740614</idno>
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<idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">002439</idno>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Lifespan behavioural and neural resilience in a social insect.</title>
<author><name sortKey="Giraldo, Ysabel Milton" sort="Giraldo, Ysabel Milton" uniqKey="Giraldo Y" first="Ysabel Milton" last="Giraldo">Ysabel Milton Giraldo</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA ygiraldo@bu.edu.</nlm:affiliation>
<country wicri:rule="url">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Kamhi, J Frances" sort="Kamhi, J Frances" uniqKey="Kamhi J" first="J Frances" last="Kamhi">J Frances Kamhi</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Fourcassie, Vincent" sort="Fourcassie, Vincent" uniqKey="Fourcassie V" first="Vincent" last="Fourcassié">Vincent Fourcassié</name>
<affiliation wicri:level="3"><nlm:affiliation>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9</wicri:regionArea>
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<region type="old region" nuts="2">Midi-Pyrénées</region>
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</placeName>
</affiliation>
</author>
<author><name sortKey="Moreau, Mathieu" sort="Moreau, Mathieu" uniqKey="Moreau M" first="Mathieu" last="Moreau">Mathieu Moreau</name>
<affiliation wicri:level="3"><nlm:affiliation>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9, France.</nlm:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Research Center on Animal Cognition, CNRS, Toulouse 31062 Cedex 9, France Research Center on Animal Cognition, Université de Toulouse, Toulouse 31062 Cedex 9</wicri:regionArea>
<placeName><region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
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</placeName>
</affiliation>
</author>
<author><name sortKey="Robson, Simon K A" sort="Robson, Simon K A" uniqKey="Robson S" first="Simon K A" last="Robson">Simon K A. Robson</name>
<affiliation wicri:level="1"><nlm:affiliation>College of Marine and Environmental Science, James Cook University, Townsville 4811, Australia.</nlm:affiliation>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>College of Marine and Environmental Science, James Cook University, Townsville 4811</wicri:regionArea>
<wicri:noRegion>Townsville 4811</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Rusakov, Adina" sort="Rusakov, Adina" uniqKey="Rusakov A" first="Adina" last="Rusakov">Adina Rusakov</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Wimberly, Lindsey" sort="Wimberly, Lindsey" uniqKey="Wimberly L" first="Lindsey" last="Wimberly">Lindsey Wimberly</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Diloreto, Alexandria" sort="Diloreto, Alexandria" uniqKey="Diloreto A" first="Alexandria" last="Diloreto">Alexandria Diloreto</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Kordek, Adrianna" sort="Kordek, Adrianna" uniqKey="Kordek A" first="Adrianna" last="Kordek">Adrianna Kordek</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Traniello, James F A" sort="Traniello, James F A" uniqKey="Traniello J" first="James F A" last="Traniello">James F A. Traniello</name>
<affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Boston University, Boston, MA 02215, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Biology, Boston University, Boston, MA 02215</wicri:regionArea>
<placeName><region type="state">Massachusetts</region>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j">Proceedings. Biological sciences</title>
<idno type="eISSN">1471-2954</idno>
<imprint><date when="2016" type="published">2016</date>
</imprint>
</series>
</biblStruct>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aging</term>
<term>Animals</term>
<term>Ants (physiology)</term>
<term>Apoptosis</term>
<term>Behavior, Animal</term>
<term>Brain (cytology)</term>
<term>Brain (physiology)</term>
<term>Dopamine (metabolism)</term>
<term>Longevity</term>
<term>Mushroom Bodies (physiology)</term>
<term>Serotonin (metabolism)</term>
<term>Social Behavior</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Animaux</term>
<term>Apoptose</term>
<term>Comportement animal</term>
<term>Comportement social</term>
<term>Corps pédonculés (physiologie)</term>
<term>Dopamine (métabolisme)</term>
<term>Encéphale (cytologie)</term>
<term>Encéphale (physiologie)</term>
<term>Fourmis (physiologie)</term>
<term>Longévité</term>
<term>Sérotonine (métabolisme)</term>
<term>Vieillissement</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Dopamine</term>
<term>Serotonin</term>
</keywords>
<keywords scheme="MESH" qualifier="cytologie" xml:lang="fr"><term>Encéphale</term>
</keywords>
<keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Brain</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Dopamine</term>
<term>Sérotonine</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Corps pédonculés</term>
<term>Encéphale</term>
<term>Fourmis</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Ants</term>
<term>Brain</term>
<term>Mushroom Bodies</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Aging</term>
<term>Animals</term>
<term>Apoptosis</term>
<term>Behavior, Animal</term>
<term>Longevity</term>
<term>Social Behavior</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Animaux</term>
<term>Apoptose</term>
<term>Comportement animal</term>
<term>Comportement social</term>
<term>Longévité</term>
<term>Vieillissement</term>
</keywords>
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<front><div type="abstract" xml:lang="en">Analyses of senescence in social species are important to understanding how group living influences the evolution of ageing in society members. Social insects exhibit remarkable lifespan polyphenisms and division of labour, presenting excellent opportunities to test hypotheses concerning ageing and behaviour. Senescence patterns in other taxa suggest that behavioural performance in ageing workers would decrease in association with declining brain functions. Using the ant Pheidole dentata as a model, we found that 120-day-old minor workers, having completed 86% of their laboratory lifespan, showed no decrease in sensorimotor functions underscoring complex tasks such as alloparenting and foraging. Collaterally, we found no age-associated increases in apoptosis in functionally specialized brain compartments or decreases in synaptic densities in the mushroom bodies, regions associated with integrative processing. Furthermore, brain titres of serotonin and dopamine--neuromodulators that could negatively impact behaviour through age-related declines--increased in old workers. Unimpaired task performance appears to be based on the maintenance of brain functions supporting olfaction and motor coordination independent of age. Our study is the first to comprehensively assess lifespan task performance and its neurobiological correlates and identify constancy in behavioural performance and the absence of significant age-related neural declines.</div>
</front>
</TEI>
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