Perceived wintering latitude determines timing of song output in a migratory bird

Abstract Migratory bird populations frequently consist of individuals that overwinter variable distances from the breeding site. Seasonal changes in photoperiod, which varies with latitude, underlie seasonal changes in singing frequency in birds. Therefore, migratory populations that consist of indi...

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Autores principales:	Dustin E. Brewer, Clint A. McGill, Adam M. Fudickar
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2020
Materias:	birdsong connectivity partial migration photoperiod timing Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/42b0e0b724524e62a158472586f5b3aa
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spelling	oai:doaj.org-article:42b0e0b724524e62a158472586f5b3aa2021-11-04T13:06:09ZPerceived wintering latitude determines timing of song output in a migratory bird2045-775810.1002/ece3.5922https://doaj.org/article/42b0e0b724524e62a158472586f5b3aa2020-01-01T00:00:00Zhttps://doi.org/10.1002/ece3.5922https://doaj.org/toc/2045-7758Abstract Migratory bird populations frequently consist of individuals that overwinter variable distances from the breeding site. Seasonal changes in photoperiod, which varies with latitude, underlie seasonal changes in singing frequency in birds. Therefore, migratory populations that consist of individuals that overwinter at different latitudes with large overwintering ranges could experience within‐population variation in seasonal production of song. To test the influence of overwintering latitude on intrapopulation variance in song production in the spring, we subjected two groups of Eastern Song Sparrows (Melospiza melodia melodia) from the same partially migratory breeding population to different photoperiodic schedules associated with a 1,300‐km difference in overwintering location. One group remained on the natural photoperiodic schedule of the breeding site (resident group) while the other group experienced a nonbreeding photoperiod that mimicked a southern migration in the fall followed by a northern migration back to the breeding site in the spring (migratory group). We compared song output between the two groups in three different stages (nonbreeding, prebreeding, and breeding). Little singing occurred during nonbreeding stage sample dates (20 November, 6 December) for the resident group, and no singing occurred for the migrant group. During the prebreeding stage (27 January, 7 February), significantly more singing occurred in the resident group than in the migrant group. During the breeding stage (21 March, 4 April), after a simulated migration for the migrants, song output was similar in both groups. These results suggest that within‐population variation in wintering latitude may contribute to variation in seasonal changes in singing behavior, which may covary with readiness to breed. Studies utilizing confirmed migrants and residents, rather than merely simulated migrants and residents, are also needed to better understand these processes.Dustin E. BrewerClint A. McGillAdam M. FudickarWileyarticlebirdsongconnectivitypartial migrationphotoperiodtimingEcologyQH540-549.5ENEcology and Evolution, Vol 10, Iss 2, Pp 748-755 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	birdsong connectivity partial migration photoperiod timing Ecology QH540-549.5
spellingShingle	birdsong connectivity partial migration photoperiod timing Ecology QH540-549.5 Dustin E. Brewer Clint A. McGill Adam M. Fudickar Perceived wintering latitude determines timing of song output in a migratory bird
description	Abstract Migratory bird populations frequently consist of individuals that overwinter variable distances from the breeding site. Seasonal changes in photoperiod, which varies with latitude, underlie seasonal changes in singing frequency in birds. Therefore, migratory populations that consist of individuals that overwinter at different latitudes with large overwintering ranges could experience within‐population variation in seasonal production of song. To test the influence of overwintering latitude on intrapopulation variance in song production in the spring, we subjected two groups of Eastern Song Sparrows (Melospiza melodia melodia) from the same partially migratory breeding population to different photoperiodic schedules associated with a 1,300‐km difference in overwintering location. One group remained on the natural photoperiodic schedule of the breeding site (resident group) while the other group experienced a nonbreeding photoperiod that mimicked a southern migration in the fall followed by a northern migration back to the breeding site in the spring (migratory group). We compared song output between the two groups in three different stages (nonbreeding, prebreeding, and breeding). Little singing occurred during nonbreeding stage sample dates (20 November, 6 December) for the resident group, and no singing occurred for the migrant group. During the prebreeding stage (27 January, 7 February), significantly more singing occurred in the resident group than in the migrant group. During the breeding stage (21 March, 4 April), after a simulated migration for the migrants, song output was similar in both groups. These results suggest that within‐population variation in wintering latitude may contribute to variation in seasonal changes in singing behavior, which may covary with readiness to breed. Studies utilizing confirmed migrants and residents, rather than merely simulated migrants and residents, are also needed to better understand these processes.
format	article
author	Dustin E. Brewer Clint A. McGill Adam M. Fudickar
author_facet	Dustin E. Brewer Clint A. McGill Adam M. Fudickar
author_sort	Dustin E. Brewer
title	Perceived wintering latitude determines timing of song output in a migratory bird
title_short	Perceived wintering latitude determines timing of song output in a migratory bird
title_full	Perceived wintering latitude determines timing of song output in a migratory bird
title_fullStr	Perceived wintering latitude determines timing of song output in a migratory bird
title_full_unstemmed	Perceived wintering latitude determines timing of song output in a migratory bird
title_sort	perceived wintering latitude determines timing of song output in a migratory bird
publisher	Wiley
publishDate	2020
url	https://doaj.org/article/42b0e0b724524e62a158472586f5b3aa
work_keys_str_mv	AT dustinebrewer perceivedwinteringlatitudedeterminestimingofsongoutputinamigratorybird AT clintamcgill perceivedwinteringlatitudedeterminestimingofsongoutputinamigratorybird AT adammfudickar perceivedwinteringlatitudedeterminestimingofsongoutputinamigratorybird
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Perceived wintering latitude determines timing of song output in a migratory bird

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