Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life
Life history traits exhibit substantial geographical variation associated with the pace of life. Species with a slow pace are expected to invest more in their future/residual reproductive value and are more common at tropical latitudes, whereas species from high latitudes, with a faster pace, are ex...
Guardado en:
| Autores principales: | , , |
|---|---|
| Publicado: |
2014
|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09088857_v45_n3_p225_Bulit http://hdl.handle.net/20.500.12110/paper_09088857_v45_n3_p225_Bulit |
| Aporte de: |
| id |
paper:paper_09088857_v45_n3_p225_Bulit |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_09088857_v45_n3_p225_Bulit2023-06-08T15:49:55Z Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life Bulit, Florencia Barrionuevo, Melina Massoni, Viviana Aves Hirundinidae Tachycineta leucorrhoa Life history traits exhibit substantial geographical variation associated with the pace of life. Species with a slow pace are expected to invest more in their future/residual reproductive value and are more common at tropical latitudes, whereas species from high latitudes, with a faster pace, are expected to prioritize the current reproductive effort. Most evidence supporting this pattern comes from studies conducted in tropical and north temperate species; very little is known about patterns in southern South American species. Here, we describe the life history of a southern swallow Tachycineta leucorrhoa and use an experimental approach to test their breeding strategy over four breeding seasons. We manipulated brood size for 105 nests of white-rumped swallows to measure whether costs of reproduction were borne by adults or nestlings as alternative selection strategies towards maintaining residual or current reproductive value. Adults increased their feeding effort in enlarged broods, at least enough to maintain nestlings' development/growth. In addition, adults decreased the number of visits to the nest (without having a negative effect on nestlings) in reduced broods. We did not detect differences in fledging success among treatments, suggesting there were no differences in nestlings' survival. However, enlarged broods more frequently incurred in complete nest failure, suggesting only some adults were able to cope with increased costs of reproduction. We conclude this species is characterized by a fast pace of life similar to their northern congeners and less like its tropical ones. This is one of the first studies to use an experimental approach to test a life history hypothesis of pace of life using data from a southern South American species. We encourage researches to include southern species when evaluating latitudinal variations as we still do not have enough evidence to assume all southern subtropical species are indeed similar to tropical ones. © 2014 The Authors. Fil:Bulit, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barrionuevo, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Massoni, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09088857_v45_n3_p225_Bulit http://hdl.handle.net/20.500.12110/paper_09088857_v45_n3_p225_Bulit |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Aves Hirundinidae Tachycineta leucorrhoa |
| spellingShingle |
Aves Hirundinidae Tachycineta leucorrhoa Bulit, Florencia Barrionuevo, Melina Massoni, Viviana Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| topic_facet |
Aves Hirundinidae Tachycineta leucorrhoa |
| description |
Life history traits exhibit substantial geographical variation associated with the pace of life. Species with a slow pace are expected to invest more in their future/residual reproductive value and are more common at tropical latitudes, whereas species from high latitudes, with a faster pace, are expected to prioritize the current reproductive effort. Most evidence supporting this pattern comes from studies conducted in tropical and north temperate species; very little is known about patterns in southern South American species. Here, we describe the life history of a southern swallow Tachycineta leucorrhoa and use an experimental approach to test their breeding strategy over four breeding seasons. We manipulated brood size for 105 nests of white-rumped swallows to measure whether costs of reproduction were borne by adults or nestlings as alternative selection strategies towards maintaining residual or current reproductive value. Adults increased their feeding effort in enlarged broods, at least enough to maintain nestlings' development/growth. In addition, adults decreased the number of visits to the nest (without having a negative effect on nestlings) in reduced broods. We did not detect differences in fledging success among treatments, suggesting there were no differences in nestlings' survival. However, enlarged broods more frequently incurred in complete nest failure, suggesting only some adults were able to cope with increased costs of reproduction. We conclude this species is characterized by a fast pace of life similar to their northern congeners and less like its tropical ones. This is one of the first studies to use an experimental approach to test a life history hypothesis of pace of life using data from a southern South American species. We encourage researches to include southern species when evaluating latitudinal variations as we still do not have enough evidence to assume all southern subtropical species are indeed similar to tropical ones. © 2014 The Authors. |
| author |
Bulit, Florencia Barrionuevo, Melina Massoni, Viviana |
| author_facet |
Bulit, Florencia Barrionuevo, Melina Massoni, Viviana |
| author_sort |
Bulit, Florencia |
| title |
Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| title_short |
Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| title_full |
Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| title_fullStr |
Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| title_full_unstemmed |
Insights into life history theory: A brood size manipulation on a southern hemisphere species, Tachycineta leucorrhoa, reveals a fast pace of life |
| title_sort |
insights into life history theory: a brood size manipulation on a southern hemisphere species, tachycineta leucorrhoa, reveals a fast pace of life |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09088857_v45_n3_p225_Bulit http://hdl.handle.net/20.500.12110/paper_09088857_v45_n3_p225_Bulit |
| work_keys_str_mv |
AT bulitflorencia insightsintolifehistorytheoryabroodsizemanipulationonasouthernhemispherespeciestachycinetaleucorrhoarevealsafastpaceoflife AT barrionuevomelina insightsintolifehistorytheoryabroodsizemanipulationonasouthernhemispherespeciestachycinetaleucorrhoarevealsafastpaceoflife AT massoniviviana insightsintolifehistorytheoryabroodsizemanipulationonasouthernhemispherespeciestachycinetaleucorrhoarevealsafastpaceoflife |
| _version_ |
1768541943906697216 |