Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

We conducted a study of the breeding biology of the White-rumped Swallow Tachycineta leucorrhoa nesting in nestboxes in a flat, farming landscape in Buenos Aires Province, Argentina. White-rumped Swallow nesting attempts were detected from the end of September to mid December, with most clutches lai...

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Autores principales:	Massoni, Viviana, Bulit, Florencia, Reboreda, Juan Carlos
Publicado:	2007
Materias:	nesting behavior passerine reproductive biology Argentina Buenos Aires [Argentina] South America Aves Hirundinidae Tachycineta bicolor Tachycineta leucorrhoa
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v149_n1_p10_Massoni http://hdl.handle.net/20.500.12110/paper_00191019_v149_n1_p10_Massoni
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00191019_v149_n1_p10_Massoni
record_format	dspace
spelling	paper:paper_00191019_v149_n1_p10_Massoni2023-06-08T14:40:10Z Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina Massoni, Viviana Bulit, Florencia Reboreda, Juan Carlos nesting behavior passerine reproductive biology Argentina Buenos Aires [Argentina] South America Aves Hirundinidae Tachycineta bicolor Tachycineta leucorrhoa We conducted a study of the breeding biology of the White-rumped Swallow Tachycineta leucorrhoa nesting in nestboxes in a flat, farming landscape in Buenos Aires Province, Argentina. White-rumped Swallow nesting attempts were detected from the end of September to mid December, with most clutches laid during October. Birds laid clutches of 4-6 eggs with a mode of five eggs; most broods hatched synchronously (58%), but hatching spread could last up to 4 days. Nestling growth curves adjust well to logistic functions, and at day 15 nestlings attain the asymptotic weight of 21.6 g. Clutch size in White-rumped Swallows declined significantly as the season progressed. In addition, late-season eggs were smaller and late-season nestlings had a shorter nestling period and lower weight at day 15, probably leaving the nest lighter than early-season nestlings. These data suggest that the Swallows would benefit greatly from laying early in the season, which would provide nestlings with better survival prospects. However, both major sources of nest mortality, interspecific competition for nest-sites and nestling mortality during bad weather, decreased through the season. White-rumped Swallows follow the pattern found for other southern species, as it has smaller clutch size, lower growth rate and remains longer at the nest than its Northern Hemisphere congener the Tree Swallow Tachycineta bicolor. © 2006 The Authors. Fil:Massoni, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bulit, F. 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. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v149_n1_p10_Massoni http://hdl.handle.net/20.500.12110/paper_00191019_v149_n1_p10_Massoni
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	nesting behavior passerine reproductive biology Argentina Buenos Aires [Argentina] South America Aves Hirundinidae Tachycineta bicolor Tachycineta leucorrhoa
spellingShingle	nesting behavior passerine reproductive biology Argentina Buenos Aires [Argentina] South America Aves Hirundinidae Tachycineta bicolor Tachycineta leucorrhoa Massoni, Viviana Bulit, Florencia Reboreda, Juan Carlos Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
topic_facet	nesting behavior passerine reproductive biology Argentina Buenos Aires [Argentina] South America Aves Hirundinidae Tachycineta bicolor Tachycineta leucorrhoa
description	We conducted a study of the breeding biology of the White-rumped Swallow Tachycineta leucorrhoa nesting in nestboxes in a flat, farming landscape in Buenos Aires Province, Argentina. White-rumped Swallow nesting attempts were detected from the end of September to mid December, with most clutches laid during October. Birds laid clutches of 4-6 eggs with a mode of five eggs; most broods hatched synchronously (58%), but hatching spread could last up to 4 days. Nestling growth curves adjust well to logistic functions, and at day 15 nestlings attain the asymptotic weight of 21.6 g. Clutch size in White-rumped Swallows declined significantly as the season progressed. In addition, late-season eggs were smaller and late-season nestlings had a shorter nestling period and lower weight at day 15, probably leaving the nest lighter than early-season nestlings. These data suggest that the Swallows would benefit greatly from laying early in the season, which would provide nestlings with better survival prospects. However, both major sources of nest mortality, interspecific competition for nest-sites and nestling mortality during bad weather, decreased through the season. White-rumped Swallows follow the pattern found for other southern species, as it has smaller clutch size, lower growth rate and remains longer at the nest than its Northern Hemisphere congener the Tree Swallow Tachycineta bicolor. © 2006 The Authors.
author	Massoni, Viviana Bulit, Florencia Reboreda, Juan Carlos
author_facet	Massoni, Viviana Bulit, Florencia Reboreda, Juan Carlos
author_sort	Massoni, Viviana
title	Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
title_short	Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
title_full	Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
title_fullStr	Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
title_full_unstemmed	Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina
title_sort	breeding biology of the white-rumped swallow tachycineta leucorrhoa in buenos aires province, argentina
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00191019_v149_n1_p10_Massoni http://hdl.handle.net/20.500.12110/paper_00191019_v149_n1_p10_Massoni
work_keys_str_mv	AT massoniviviana breedingbiologyofthewhiterumpedswallowtachycinetaleucorrhoainbuenosairesprovinceargentina AT bulitflorencia breedingbiologyofthewhiterumpedswallowtachycinetaleucorrhoainbuenosairesprovinceargentina AT reboredajuancarlos breedingbiologyofthewhiterumpedswallowtachycinetaleucorrhoainbuenosairesprovinceargentina
_version_	1768546475878383616

Breeding biology of the White-rumped Swallow Tachycineta leucorrhoa in Buenos Aires Province, Argentina

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