Factors affecting the probability of double brooding by Southern House Wrens

Seasonal fecundity of birds is influenced by clutch sizes and the number of successful breeding attempts during a breeding season. As such, understanding the factors that determine the decision to initiate multiple broods within a season and the consequences of this reproductive tactic is important....

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Detalles Bibliográficos
Autores principales: Carro, Mariana Emilia, Mermoz, Myriam Emilia, Fernandez, Gustavo Javier
Publicado: 2014
Materias:
Environmental factors
Fecundity
Lifetime productivity
Nesting success
Reproductive effort
Troglodytes aedon musculus
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02738570_v85_n3_p227_Carro
http://hdl.handle.net/20.500.12110/paper_02738570_v85_n3_p227_Carro
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02738570_v85_n3_p227_Carro
record_format dspace
spelling paper:paper_02738570_v85_n3_p227_Carro2023-06-08T15:25:50Z Factors affecting the probability of double brooding by Southern House Wrens Carro, Mariana Emilia Mermoz, Myriam Emilia Fernandez, Gustavo Javier Environmental factors Fecundity Lifetime productivity Nesting success Reproductive effort Troglodytes aedon musculus Seasonal fecundity of birds is influenced by clutch sizes and the number of successful breeding attempts during a breeding season. As such, understanding the factors that determine the decision to initiate multiple broods within a season and the consequences of this reproductive tactic is important. We examined the frequency of double brooding by Southern House Wrens (Troglodytes aedon musculus) in eastern Argentina. We analyzed inter- and intraseasonal variation in double brooding and evaluated the effect of weather conditions and laying date on the frequency and occurrence of this behavior. Finally, we assessed the effect of double brooding on the seasonal and lifetime productivity of female Southern House Wrens. During our 8-year study, we found that ∼43% (range = 17-83% each year) of breeding pairs attempted a second brood after successfully raising a first brood. The probability of females having a second brood was affected by the laying date of the first nesting attempt, but was independent of the number of young fledged. About 65% of females that started laying eggs before the first quarter of each breeding season produced a second brood, and this percentage decreased to ∼40% after this period. In addition, variation in double-brooding frequency among years was related to weather conditions, with the proportion of pairs double brooding increasing with increased precipitation early in the breeding season. More precipitation likely contributed to an increase in insect abundance. Although double brooding increased the seasonal and lifetime productivity of female Southern House Wrens, additional study of the survival and fate of fledglings from first and second broods is needed to assess the importance of multi-brooding in the reproductive success of these wrens. © 2014 Association of Field Ornithologists. Fil:Carro, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mermoz, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández, G.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02738570_v85_n3_p227_Carro http://hdl.handle.net/20.500.12110/paper_02738570_v85_n3_p227_Carro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Environmental factors
Fecundity
Lifetime productivity
Nesting success
Reproductive effort
Troglodytes aedon musculus
spellingShingle Environmental factors
Fecundity
Lifetime productivity
Nesting success
Reproductive effort
Troglodytes aedon musculus
Carro, Mariana Emilia
Mermoz, Myriam Emilia
Fernandez, Gustavo Javier
Factors affecting the probability of double brooding by Southern House Wrens
topic_facet Environmental factors
Fecundity
Lifetime productivity
Nesting success
Reproductive effort
Troglodytes aedon musculus
description Seasonal fecundity of birds is influenced by clutch sizes and the number of successful breeding attempts during a breeding season. As such, understanding the factors that determine the decision to initiate multiple broods within a season and the consequences of this reproductive tactic is important. We examined the frequency of double brooding by Southern House Wrens (Troglodytes aedon musculus) in eastern Argentina. We analyzed inter- and intraseasonal variation in double brooding and evaluated the effect of weather conditions and laying date on the frequency and occurrence of this behavior. Finally, we assessed the effect of double brooding on the seasonal and lifetime productivity of female Southern House Wrens. During our 8-year study, we found that ∼43% (range = 17-83% each year) of breeding pairs attempted a second brood after successfully raising a first brood. The probability of females having a second brood was affected by the laying date of the first nesting attempt, but was independent of the number of young fledged. About 65% of females that started laying eggs before the first quarter of each breeding season produced a second brood, and this percentage decreased to ∼40% after this period. In addition, variation in double-brooding frequency among years was related to weather conditions, with the proportion of pairs double brooding increasing with increased precipitation early in the breeding season. More precipitation likely contributed to an increase in insect abundance. Although double brooding increased the seasonal and lifetime productivity of female Southern House Wrens, additional study of the survival and fate of fledglings from first and second broods is needed to assess the importance of multi-brooding in the reproductive success of these wrens. © 2014 Association of Field Ornithologists.
author Carro, Mariana Emilia
Mermoz, Myriam Emilia
Fernandez, Gustavo Javier
author_facet Carro, Mariana Emilia
Mermoz, Myriam Emilia
Fernandez, Gustavo Javier
author_sort Carro, Mariana Emilia
title Factors affecting the probability of double brooding by Southern House Wrens
title_short Factors affecting the probability of double brooding by Southern House Wrens
title_full Factors affecting the probability of double brooding by Southern House Wrens
title_fullStr Factors affecting the probability of double brooding by Southern House Wrens
title_full_unstemmed Factors affecting the probability of double brooding by Southern House Wrens
title_sort factors affecting the probability of double brooding by southern house wrens
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02738570_v85_n3_p227_Carro
http://hdl.handle.net/20.500.12110/paper_02738570_v85_n3_p227_Carro
work_keys_str_mv AT carromarianaemilia factorsaffectingtheprobabilityofdoublebroodingbysouthernhousewrens
AT mermozmyriamemilia factorsaffectingtheprobabilityofdoublebroodingbysouthernhousewrens
AT fernandezgustavojavier factorsaffectingtheprobabilityofdoublebroodingbysouthernhousewrens
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