Is group size related to longevity in mammals?
Life-history theory predicts that reduced extrinsic risk of mortality should increase species longevity over evolutionary time. Increasing group size should reduce an individual's risk of predation, and consequently reduce its extrinsic risk of mortality. Therefore, we should expect a relations...
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Veröffentlicht in: | Biology letters (2005) 2010-12, Vol.6 (6), p.736-739 |
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description | Life-history theory predicts that reduced extrinsic risk of mortality should increase species longevity over evolutionary time. Increasing group size should reduce an individual's risk of predation, and consequently reduce its extrinsic risk of mortality. Therefore, we should expect a relationship between group size and maximum longevity across species, while controlling for well-known correlates of longevity. We tested this hypothesis using a dataset of 253 mammal species and phylogenetic comparative methods. We found that group size was a poor predictor of maximum longevity across all mammals, as well as within primates and rodents. We found a weak but significant group-size effect on artiodactyl longevity, but in a negative direction. Body mass was consistently the best predictor of maximum longevity, which may be owing to lower predation risk and/or lower basal metabolic rates for large species. Artiodactyls living in large groups may exhibit higher rates of extrinsic mortality because of being more conspicuous to predators in open habitats, resulting in shorter lifespans. |
doi_str_mv | 10.1098/rsbl.2010.0348 |
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Lett</addtitle><addtitle>Biol. Lett</addtitle><description>Life-history theory predicts that reduced extrinsic risk of mortality should increase species longevity over evolutionary time. Increasing group size should reduce an individual's risk of predation, and consequently reduce its extrinsic risk of mortality. Therefore, we should expect a relationship between group size and maximum longevity across species, while controlling for well-known correlates of longevity. We tested this hypothesis using a dataset of 253 mammal species and phylogenetic comparative methods. We found that group size was a poor predictor of maximum longevity across all mammals, as well as within primates and rodents. We found a weak but significant group-size effect on artiodactyl longevity, but in a negative direction. Body mass was consistently the best predictor of maximum longevity, which may be owing to lower predation risk and/or lower basal metabolic rates for large species. Artiodactyls living in large groups may exhibit higher rates of extrinsic mortality because of being more conspicuous to predators in open habitats, resulting in shorter lifespans.</description><subject>Animal Behaviour</subject><subject>Animals</subject><subject>Artiodactyla - genetics</subject><subject>Artiodactyla - physiology</subject><subject>Biological Evolution</subject><subject>Female</subject><subject>Humans</subject><subject>Life History</subject><subject>Lifespan</subject><subject>Longevity - genetics</subject><subject>Longevity - physiology</subject><subject>Male</subject><subject>Mammals - genetics</subject><subject>Mammals - physiology</subject><subject>Phylogeny</subject><subject>Population Density</subject><subject>Predation</subject><subject>Primates</subject><subject>Primates - genetics</subject><subject>Primates - physiology</subject><subject>Rodentia - genetics</subject><subject>Rodentia - physiology</subject><subject>Senescence</subject><subject>Sociality</subject><issn>1744-9561</issn><issn>1744-957X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkU1v1DAQhiMEoqVw5Yhy45TF33YuIFjxUbQSBQrqbeT1ThaXJF7sZMX21-NVyooKQU_j0Twz83reonhMyYyS2jyLadnOGMkp4cLcKY6pFqKqpb64e3grelQ8SOmSEK41kfeLI0aEYsbo42J2msp1DOOmTP4Ky4itHXBVDqFsQ7_GrR92pe_LznadbdOLh8W9Jkd8dB1Pii9vXp_P31WLD29P5y8XlVNMDpVUUgljnaidq2XtlkSRmiiHwq2EQrlqKNWyoZxjrjGhGqQWGVM2C-P1kp8Uz6e5m3HZ4cphP0Tbwib6zsYdBOvhZqX332AdtsAJoVyZPODp9YAYfoyYBuh8cti2tscwJqgZZ8QILW8niaaScqpuJbUSkut87kzOJtLFkFLE5qCcEtj7BnvfYO8b7H3LDU_-_O8B_21UBuwExLDLhw_O47CDyzDGPqfw6fOrxVZ5BcRwSoQwRMKV30xrFPiURszx5ta_RfD_7fin9Grq8mnAnwflNn4HpfM54KsRwC_O5meL8_fwkf8CaKzUag</recordid><startdate>20101223</startdate><enddate>20101223</enddate><creator>Kamilar, Jason M.</creator><creator>Bribiescas, Richard G.</creator><creator>Bradley, Brenda J.</creator><general>The Royal Society</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SN</scope><scope>C1K</scope><scope>5PM</scope></search><sort><creationdate>20101223</creationdate><title>Is group size related to longevity in mammals?</title><author>Kamilar, Jason M. ; Bribiescas, Richard G. ; Bradley, Brenda J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c625t-565648ac49cc959cb060906ce4cd46e5df1175f133ecb0246fe1ae226a04639b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Animal Behaviour</topic><topic>Animals</topic><topic>Artiodactyla - genetics</topic><topic>Artiodactyla - physiology</topic><topic>Biological Evolution</topic><topic>Female</topic><topic>Humans</topic><topic>Life History</topic><topic>Lifespan</topic><topic>Longevity - genetics</topic><topic>Longevity - physiology</topic><topic>Male</topic><topic>Mammals - genetics</topic><topic>Mammals - physiology</topic><topic>Phylogeny</topic><topic>Population Density</topic><topic>Predation</topic><topic>Primates</topic><topic>Primates - genetics</topic><topic>Primates - physiology</topic><topic>Rodentia - genetics</topic><topic>Rodentia - physiology</topic><topic>Senescence</topic><topic>Sociality</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kamilar, Jason M.</creatorcontrib><creatorcontrib>Bribiescas, Richard G.</creatorcontrib><creatorcontrib>Bradley, Brenda J.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Ecology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Biology letters (2005)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kamilar, Jason M.</au><au>Bribiescas, Richard G.</au><au>Bradley, Brenda J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Is group size related to longevity in mammals?</atitle><jtitle>Biology letters (2005)</jtitle><stitle>Biol. 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subjects | Animal Behaviour Animals Artiodactyla - genetics Artiodactyla - physiology Biological Evolution Female Humans Life History Lifespan Longevity - genetics Longevity - physiology Male Mammals - genetics Mammals - physiology Phylogeny Population Density Predation Primates Primates - genetics Primates - physiology Rodentia - genetics Rodentia - physiology Senescence Sociality |
title | Is group size related to longevity in mammals? |
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