The economics of nestmate killing in avian brood parasites: A provisions trade-off
Some brood parasites kill all their host's offspring shortly after hatching, whereas others are tolerant and are reared in mixed host-parasite broods. This difference may arise because nestling parasites face a "provisions trade-off," whereby the presence of host nestlings can increas...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10452249_v23_n1_p132_Gloag http://hdl.handle.net/20.500.12110/paper_10452249_v23_n1_p132_Gloag |
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paper:paper_10452249_v23_n1_p132_Gloag2023-06-08T16:01:08Z The economics of nestmate killing in avian brood parasites: A provisions trade-off Tuero, Diego Tomas Fiorini, Vanina Dafne Reboreda, Juan Carlos brood parasitism Molothrus bonariensis shiny cowbird virulence brood parasitism experimental study food intake food provisioning generalist growth rate hatching host-parasite interaction natural selection nestling parasite passerine survival trade-off virulence Aves Mimus saturninus Molothrus Molothrus bonariensis Troglodytes Troglodytes aedon Some brood parasites kill all their host's offspring shortly after hatching, whereas others are tolerant and are reared in mixed host-parasite broods. This difference may arise because nestling parasites face a "provisions trade-off," whereby the presence of host nestlings can increase or decrease a parasite's food intake depending on whether host young cause parents to supply more extra food than they consume. We model this trade-off and show that the optimal nestmate number from a parasite's perspective depends on the interaction of 2 parameters describing a parasite's stimulative and competitive properties, relative to host young. Where these parameters differ from one host-parasite pair to the next, either nestmate killing or nestmate tolerance can be favored by natural selection for maximum intake. We show that this extends to variation between hosts of generalist parasites. In an experimental field study, we found that nestling shiny cowbirds (Molothrus bonariensis) reared by house wrens (Troglodytes aedon) had higher food intake and mass growth rate when accompanied by host young than when alone, whereas those reared by chalk-browed mockingbirds (Mimus saturninus) had higher food intake, mass growth, and survival when reared alone than with host young. In both hosts, total provisioning was higher when host nestlings were present, but only in house wrens did cowbirds secure a sufficient share of that extra provisioning to benefit from host nestlings' presence. Thus, a provisions trade-off might generate opposing selective forces on the evolution of nestmate killing not only between parasite species but also within parasite species using multiple hosts. © 2011 The Author. Fil:Tuero, D.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fiorini, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10452249_v23_n1_p132_Gloag http://hdl.handle.net/20.500.12110/paper_10452249_v23_n1_p132_Gloag |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
brood parasitism Molothrus bonariensis shiny cowbird virulence brood parasitism experimental study food intake food provisioning generalist growth rate hatching host-parasite interaction natural selection nestling parasite passerine survival trade-off virulence Aves Mimus saturninus Molothrus Molothrus bonariensis Troglodytes Troglodytes aedon |
| spellingShingle |
brood parasitism Molothrus bonariensis shiny cowbird virulence brood parasitism experimental study food intake food provisioning generalist growth rate hatching host-parasite interaction natural selection nestling parasite passerine survival trade-off virulence Aves Mimus saturninus Molothrus Molothrus bonariensis Troglodytes Troglodytes aedon Tuero, Diego Tomas Fiorini, Vanina Dafne Reboreda, Juan Carlos The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| topic_facet |
brood parasitism Molothrus bonariensis shiny cowbird virulence brood parasitism experimental study food intake food provisioning generalist growth rate hatching host-parasite interaction natural selection nestling parasite passerine survival trade-off virulence Aves Mimus saturninus Molothrus Molothrus bonariensis Troglodytes Troglodytes aedon |
| description |
Some brood parasites kill all their host's offspring shortly after hatching, whereas others are tolerant and are reared in mixed host-parasite broods. This difference may arise because nestling parasites face a "provisions trade-off," whereby the presence of host nestlings can increase or decrease a parasite's food intake depending on whether host young cause parents to supply more extra food than they consume. We model this trade-off and show that the optimal nestmate number from a parasite's perspective depends on the interaction of 2 parameters describing a parasite's stimulative and competitive properties, relative to host young. Where these parameters differ from one host-parasite pair to the next, either nestmate killing or nestmate tolerance can be favored by natural selection for maximum intake. We show that this extends to variation between hosts of generalist parasites. In an experimental field study, we found that nestling shiny cowbirds (Molothrus bonariensis) reared by house wrens (Troglodytes aedon) had higher food intake and mass growth rate when accompanied by host young than when alone, whereas those reared by chalk-browed mockingbirds (Mimus saturninus) had higher food intake, mass growth, and survival when reared alone than with host young. In both hosts, total provisioning was higher when host nestlings were present, but only in house wrens did cowbirds secure a sufficient share of that extra provisioning to benefit from host nestlings' presence. Thus, a provisions trade-off might generate opposing selective forces on the evolution of nestmate killing not only between parasite species but also within parasite species using multiple hosts. © 2011 The Author. |
| author |
Tuero, Diego Tomas Fiorini, Vanina Dafne Reboreda, Juan Carlos |
| author_facet |
Tuero, Diego Tomas Fiorini, Vanina Dafne Reboreda, Juan Carlos |
| author_sort |
Tuero, Diego Tomas |
| title |
The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| title_short |
The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| title_full |
The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| title_fullStr |
The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| title_full_unstemmed |
The economics of nestmate killing in avian brood parasites: A provisions trade-off |
| title_sort |
economics of nestmate killing in avian brood parasites: a provisions trade-off |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10452249_v23_n1_p132_Gloag http://hdl.handle.net/20.500.12110/paper_10452249_v23_n1_p132_Gloag |
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1768541856261472256 |