Torpor in three species of Brazilian hummingbirds under semi-natural conditions
We measured body temperatures in three species of Brazilian hummingbirds, the Versicolored Emerald (Amazilia versicolor; body mass 4.1 g), the Black Jacobin (Me lantrochilus fuscus; body mass 7.7 g) and the Swallow-tailed Hummingbird (Eupetomena macroura; body mass 8.6 g), during overnight exposure...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1997 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/35628 |
| Acceso en línea: | http://dx.doi.org/10.2307/1370489 http://hdl.handle.net/11449/35628 |
| Access Level: | acceso abierto |
| Palabra clave: | hummingbirds Amazilia versicolor Melanotrochilus fuscus Eupetomena macroura torpor thermoregulation body temperature |
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Torpor in three species of Brazilian hummingbirds under semi-natural conditionshummingbirdsAmazilia versicolorMelanotrochilus fuscusEupetomena macrouratorporthermoregulationbody temperatureWe measured body temperatures in three species of Brazilian hummingbirds, the Versicolored Emerald (Amazilia versicolor; body mass 4.1 g), the Black Jacobin (Me lantrochilus fuscus; body mass 7.7 g) and the Swallow-tailed Hummingbird (Eupetomena macroura; body mass 8.6 g), during overnight exposure to natural conditions of photoperiod and ambient temperatures. All three species entered torpor. In both A. versicolor and E. macroura, individuals entered torpor even if they had access to feeders up to the time of sunset. In contrast, M. fuscus was less prone to enter torpor and did so mainly if it had been fasting for more than two hours before sunset. Furthermore, M. fuscus often spent the whole night in torpor, whereas the two other species entered torpor for a variable, often short, period of the night. We observed more than one torpor bout during a single night in all three species. We suggest that multiple nocturnal torpors result from interruption of the normal torpor pattern by some (unknown) external stimuli. Any interrupted torpor was always followed by a new entry into torpor, supporting the view that there is a body mass threshold below which the hummingbirds must enter torpor Our data also indicate that these hummingbird species might use torpor even if they are not energetically stressed.UNIV ESTADUAL PAULISTA,DEPT ZOOL,BR-13506900 RIO CLARO,SP,BRAZILAARHUS UNIV,DEPT ZOOPHYSIOL,DK-8000 AARHUS C,DENMARKWESTFAL MUSEUM NATURKUNDE,D-48161 MUNSTER,GERMANYUNIV SAO PAULO,INST BIOCIENCIAS,DEPT FISIOL,BR-05508900 SAO PAULO,BRAZILUNIV ESTADUAL PAULISTA,DEPT ZOOL,BR-13506900 RIO CLARO,SP,BRAZILCooper Ornithological SocUniversidade Estadual Paulista (Unesp)Aarhus University (AU)Westfal Museum NaturkundeUniversidade de São Paulo (USP)2014-05-20T15:25:10Z2014-05-20T15:25:10Z1997-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article780-788application/pdfhttp://dx.doi.org/10.2307/1370489Condor. Lawrence: Cooper Ornithological Soc, v. 99, n. 3, p. 780-788, 1997.0010-5422http://hdl.handle.net/11449/3562810.2307/1370489WOS:A1997XQ30100020WOSA1997XQ30100020.pdf8776757457144680Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCondor2.7221,386info:eu-repo/semantics/openAccessBech, C.Abe, Augusto Shinya [UNESP]Steffensen, J. F.Berger, M.Bicudo, J. E. P. W.2024-10-21T15:06:47Zoai:repositorio.unesp.br:11449/35628Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-10-21T15:06:47Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
| dc.title.none.fl_str_mv |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| title |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| spellingShingle |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions Bech, C. hummingbirds Amazilia versicolor Melanotrochilus fuscus Eupetomena macroura torpor thermoregulation body temperature |
| title_short |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| title_full |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| title_fullStr |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| title_full_unstemmed |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| title_sort |
Torpor in three species of Brazilian hummingbirds under semi-natural conditions |
| dc.creator.none.fl_str_mv |
Bech, C. Abe, Augusto Shinya [UNESP] Steffensen, J. F. Berger, M. Bicudo, J. E. P. W. |
| author |
Bech, C. |
| author_facet |
Bech, C. Abe, Augusto Shinya [UNESP] Steffensen, J. F. Berger, M. Bicudo, J. E. P. W. |
| author_role |
author |
| author2 |
Abe, Augusto Shinya [UNESP] Steffensen, J. F. Berger, M. Bicudo, J. E. P. W. |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Aarhus University (AU) Westfal Museum Naturkunde Universidade de São Paulo (USP) |
| dc.subject.por.fl_str_mv |
hummingbirds Amazilia versicolor Melanotrochilus fuscus Eupetomena macroura torpor thermoregulation body temperature |
| topic |
hummingbirds Amazilia versicolor Melanotrochilus fuscus Eupetomena macroura torpor thermoregulation body temperature |
| description |
We measured body temperatures in three species of Brazilian hummingbirds, the Versicolored Emerald (Amazilia versicolor; body mass 4.1 g), the Black Jacobin (Me lantrochilus fuscus; body mass 7.7 g) and the Swallow-tailed Hummingbird (Eupetomena macroura; body mass 8.6 g), during overnight exposure to natural conditions of photoperiod and ambient temperatures. All three species entered torpor. In both A. versicolor and E. macroura, individuals entered torpor even if they had access to feeders up to the time of sunset. In contrast, M. fuscus was less prone to enter torpor and did so mainly if it had been fasting for more than two hours before sunset. Furthermore, M. fuscus often spent the whole night in torpor, whereas the two other species entered torpor for a variable, often short, period of the night. We observed more than one torpor bout during a single night in all three species. We suggest that multiple nocturnal torpors result from interruption of the normal torpor pattern by some (unknown) external stimuli. Any interrupted torpor was always followed by a new entry into torpor, supporting the view that there is a body mass threshold below which the hummingbirds must enter torpor Our data also indicate that these hummingbird species might use torpor even if they are not energetically stressed. |
| publishDate |
1997 |
| dc.date.none.fl_str_mv |
1997-08-01 2014-05-20T15:25:10Z 2014-05-20T15:25:10Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2307/1370489 Condor. Lawrence: Cooper Ornithological Soc, v. 99, n. 3, p. 780-788, 1997. 0010-5422 http://hdl.handle.net/11449/35628 10.2307/1370489 WOS:A1997XQ30100020 WOSA1997XQ30100020.pdf 8776757457144680 |
| url |
http://dx.doi.org/10.2307/1370489 http://hdl.handle.net/11449/35628 |
| identifier_str_mv |
Condor. Lawrence: Cooper Ornithological Soc, v. 99, n. 3, p. 780-788, 1997. 0010-5422 10.2307/1370489 WOS:A1997XQ30100020 WOSA1997XQ30100020.pdf 8776757457144680 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
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Condor 2.722 1,386 |
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info:eu-repo/semantics/openAccess |
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openAccess |
| dc.format.none.fl_str_mv |
780-788 application/pdf |
| dc.publisher.none.fl_str_mv |
Cooper Ornithological Soc |
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Cooper Ornithological Soc |
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Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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