Begging at high level simultaneously impairs growth and immune response in southern shrike (Lanius meridionalis) nestlings
Theoretical models suggest that begging should be costly in order to be evolutionarily stable. However, evidence for such a cost is contradictory (e.g. for growth costs) or scant (e.g. for immunological costs). Here, we experimentally test the existence of both costs in southern shrike (Lanius merid...
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| Veröffentlicht in: | Journal of evolutionary biology 2011-05, Vol.24 (5), p.1091-1098 |
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| creator | MORENO-RUEDA, G REDONDO, T |
| description | Theoretical models suggest that begging should be costly in order to be evolutionarily stable. However, evidence for such a cost is contradictory (e.g. for growth costs) or scant (e.g. for immunological costs). Here, we experimentally test the existence of both costs in southern shrike (Lanius meridionalis) nestlings. Nestlings were paired by nest of origin and similar body mass. In each pair, a nestling was forced to beg for about 30 s h⁻¹, whereas the other begged for only 2 s, both nestlings receiving the same quantity of food. At the same time, the nestling response to an antigen (phytohaemagglutinin) was measured. Nestlings forced to beg for longer showed a reduction in growth rate and in immunocompetence when compared to control chicks. The two costs occurred independently of each other and were negatively correlated to time begging. These results strongly support models of honest signalling as well as scramble competition, which predict that begging should be costly in order to be evolutionarily stable. |
| doi_str_mv | 10.1111/j.1420-9101.2011.02242.x |
| format | Article |
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However, evidence for such a cost is contradictory (e.g. for growth costs) or scant (e.g. for immunological costs). Here, we experimentally test the existence of both costs in southern shrike (Lanius meridionalis) nestlings. Nestlings were paired by nest of origin and similar body mass. In each pair, a nestling was forced to beg for about 30 s h⁻¹, whereas the other begged for only 2 s, both nestlings receiving the same quantity of food. At the same time, the nestling response to an antigen (phytohaemagglutinin) was measured. Nestlings forced to beg for longer showed a reduction in growth rate and in immunocompetence when compared to control chicks. The two costs occurred independently of each other and were negatively correlated to time begging. These results strongly support models of honest signalling as well as scramble competition, which predict that begging should be costly in order to be evolutionarily stable.</description><identifier>ISSN: 1010-061X</identifier><identifier>EISSN: 1420-9101</identifier><identifier>DOI: 10.1111/j.1420-9101.2011.02242.x</identifier><identifier>PMID: 21338437</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Animal behavior ; Animals ; Animals, Newborn - growth & development ; Animals, Newborn - immunology ; Animals, Newborn - psychology ; antigens ; begging ; Biological Evolution ; Birds ; chicks ; correlation ; Evolutionary biology ; Feeding Behavior ; foods ; growth costs ; growth retardation ; honest signalling ; immune response ; Immunocompetence ; Immunology ; Lanius ; Lanius meridionalis ; Nesting Behavior ; nests ; parent–offspring conflict ; Physical growth ; phytohemagglutinin ; sibling competition ; Songbirds - growth & development ; Songbirds - immunology ; trade‐offs</subject><ispartof>Journal of evolutionary biology, 2011-05, Vol.24 (5), p.1091-1098</ispartof><rights>2011 The Authors. Journal of Evolutionary Biology © 2011 European Society For Evolutionary Biology</rights><rights>2011 The Authors. 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However, evidence for such a cost is contradictory (e.g. for growth costs) or scant (e.g. for immunological costs). Here, we experimentally test the existence of both costs in southern shrike (Lanius meridionalis) nestlings. Nestlings were paired by nest of origin and similar body mass. In each pair, a nestling was forced to beg for about 30 s h⁻¹, whereas the other begged for only 2 s, both nestlings receiving the same quantity of food. At the same time, the nestling response to an antigen (phytohaemagglutinin) was measured. Nestlings forced to beg for longer showed a reduction in growth rate and in immunocompetence when compared to control chicks. The two costs occurred independently of each other and were negatively correlated to time begging. These results strongly support models of honest signalling as well as scramble competition, which predict that begging should be costly in order to be evolutionarily stable.</description><subject>Animal behavior</subject><subject>Animals</subject><subject>Animals, Newborn - growth & development</subject><subject>Animals, Newborn - immunology</subject><subject>Animals, Newborn - psychology</subject><subject>antigens</subject><subject>begging</subject><subject>Biological Evolution</subject><subject>Birds</subject><subject>chicks</subject><subject>correlation</subject><subject>Evolutionary biology</subject><subject>Feeding Behavior</subject><subject>foods</subject><subject>growth costs</subject><subject>growth retardation</subject><subject>honest signalling</subject><subject>immune response</subject><subject>Immunocompetence</subject><subject>Immunology</subject><subject>Lanius</subject><subject>Lanius meridionalis</subject><subject>Nesting Behavior</subject><subject>nests</subject><subject>parent–offspring conflict</subject><subject>Physical growth</subject><subject>phytohemagglutinin</subject><subject>sibling competition</subject><subject>Songbirds - growth & development</subject><subject>Songbirds - immunology</subject><subject>trade‐offs</subject><issn>1010-061X</issn><issn>1420-9101</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkstu1TAQhiMEohd4BbDYUBYJHt-SLFjQqtx0JBZQiZ3lk0wSH5zk1E5oD0-PQ0oXbMDSyKPx989o9DtJCNAM4nm9y0AwmpZAIWMUIKOMCZbdPkiO7x8expwCTamCb0fJSQg7SkEJKR8nRww4LwTPj5Of59i2dmiJmUhn2444_IGOBNvPbjIDjnNwB2L7vbE-kNaPN1NHzFDHUj8PSDyG_TgEJHYgYZynDn1MOm-_IznbmMHOgfTobW3HwTgbXpEBw-TixPAkedQYF_Dp3X2aXL27_HrxId18fv_x4u0mrSQFlkrYVlxsG7FloJqS08rkNatLJYqcSyNLBY2SFdTC1KKqsKJQAAqJscpFjNPk5dp378frOU7XvQ0VOreup0uagyw4Z_8kC8UFFDIvIvniL3I3zj5uuEBMKA40j1CxQpUfQ_DY6L23vfEHDVQvPuqdXuzSi1168VH_9lHfRumzu_7ztsf6XvjHuAi8WYEb6_Dw3431p8vzJYv656u-MaM2rbdBX32JpKA0fphC5fwXQeq1bw</recordid><startdate>201105</startdate><enddate>201105</enddate><creator>MORENO-RUEDA, G</creator><creator>REDONDO, T</creator><general>Blackwell Publishing Ltd</general><scope>FBQ</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>7QG</scope><scope>7QP</scope><scope>7QR</scope><scope>7SN</scope><scope>7SS</scope><scope>7TK</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>K9.</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><scope>7T5</scope><scope>H94</scope></search><sort><creationdate>201105</creationdate><title>Begging at high level simultaneously impairs growth and immune response in southern shrike (Lanius meridionalis) nestlings</title><author>MORENO-RUEDA, G ; 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However, evidence for such a cost is contradictory (e.g. for growth costs) or scant (e.g. for immunological costs). Here, we experimentally test the existence of both costs in southern shrike (Lanius meridionalis) nestlings. Nestlings were paired by nest of origin and similar body mass. In each pair, a nestling was forced to beg for about 30 s h⁻¹, whereas the other begged for only 2 s, both nestlings receiving the same quantity of food. At the same time, the nestling response to an antigen (phytohaemagglutinin) was measured. Nestlings forced to beg for longer showed a reduction in growth rate and in immunocompetence when compared to control chicks. The two costs occurred independently of each other and were negatively correlated to time begging. 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| subjects | Animal behavior Animals Animals, Newborn - growth & development Animals, Newborn - immunology Animals, Newborn - psychology antigens begging Biological Evolution Birds chicks correlation Evolutionary biology Feeding Behavior foods growth costs growth retardation honest signalling immune response Immunocompetence Immunology Lanius Lanius meridionalis Nesting Behavior nests parent–offspring conflict Physical growth phytohemagglutinin sibling competition Songbirds - growth & development Songbirds - immunology trade‐offs |
| title | Begging at high level simultaneously impairs growth and immune response in southern shrike (Lanius meridionalis) nestlings |
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