Does predation danger on southward migration curtail parental investment by female western sandpipers?

Theory predicts that if extending parental care delays migratory departure, and if later migration is more dangerous, then parental care should be curtailed to make an earlier departure. Adult western sandpipers (Calidris mauri) depart Alaska in July, and the presence of peregrine falcons (Falco per...

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Autores principales:	Jamieson Sarah Emily, Ydenberg Ronald C, Lank David B
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2015
Materias:	maternal care migration danger hypothesis predation risk seasonal variation shorebirds trade-offs waders Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/e7e5e1b8b47b40ab977715e4ea8ba39f
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spelling	oai:doaj.org-article:e7e5e1b8b47b40ab977715e4ea8ba39f2021-12-02T17:31:32ZDoes predation danger on southward migration curtail parental investment by female western sandpipers?2084-883810.2478/ami-2014-0004https://doaj.org/article/e7e5e1b8b47b40ab977715e4ea8ba39f2015-01-01T00:00:00Zhttps://doi.org/10.2478/ami-2014-0004https://doaj.org/toc/2084-8838Theory predicts that if extending parental care delays migratory departure, and if later migration is more dangerous, then parental care should be curtailed to make an earlier departure. Adult western sandpipers (Calidris mauri) depart Alaska in July, and the presence of peregrine falcons (Falco peregrinus) along their route rises steeply during the migratory period. Pacific dunlins (C. alpina pacifica) are ecologically similar, but do not depart Alaska until October, after peregrine passage has peaked. Because peregrine migration begins earlier in years with early snowmelt, we predicted that the curtailment of parental investment by western sandpiper, but not of Pacific dunlins, should be more pronounced in these more dangerous years. We measured breeding phenology of these species on the Yukon Delta National Wildlife Refuge during three seasons with strongly differing snowmelt timing. We found that they initiated breeding simultaneously, and that western sandpipers, but not Pacific dunlins, ceased laying increasingly earlier, provided increasingly less parental care and departed increasingly sooner as snowmelt was earlier. Advancing departure date by the overall average of 5.2d relative to dunlin reduces migratory exposure to peregrines by an estimated 18%. Our results support the hypothesis that natural selection has favored curtailment of parental investment by western sandpipers to advance migratory departure.Jamieson Sarah EmilyYdenberg Ronald CLank David BDe Gruyterarticlematernal caremigration danger hypothesispredation riskseasonal variationshorebirdstrade-offswadersBiology (General)QH301-705.5ENAnimal Migration, Vol 2, Iss 1, Pp 34-43 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	maternal care migration danger hypothesis predation risk seasonal variation shorebirds trade-offs waders Biology (General) QH301-705.5
spellingShingle	maternal care migration danger hypothesis predation risk seasonal variation shorebirds trade-offs waders Biology (General) QH301-705.5 Jamieson Sarah Emily Ydenberg Ronald C Lank David B Does predation danger on southward migration curtail parental investment by female western sandpipers?
description	Theory predicts that if extending parental care delays migratory departure, and if later migration is more dangerous, then parental care should be curtailed to make an earlier departure. Adult western sandpipers (Calidris mauri) depart Alaska in July, and the presence of peregrine falcons (Falco peregrinus) along their route rises steeply during the migratory period. Pacific dunlins (C. alpina pacifica) are ecologically similar, but do not depart Alaska until October, after peregrine passage has peaked. Because peregrine migration begins earlier in years with early snowmelt, we predicted that the curtailment of parental investment by western sandpiper, but not of Pacific dunlins, should be more pronounced in these more dangerous years. We measured breeding phenology of these species on the Yukon Delta National Wildlife Refuge during three seasons with strongly differing snowmelt timing. We found that they initiated breeding simultaneously, and that western sandpipers, but not Pacific dunlins, ceased laying increasingly earlier, provided increasingly less parental care and departed increasingly sooner as snowmelt was earlier. Advancing departure date by the overall average of 5.2d relative to dunlin reduces migratory exposure to peregrines by an estimated 18%. Our results support the hypothesis that natural selection has favored curtailment of parental investment by western sandpipers to advance migratory departure.
format	article
author	Jamieson Sarah Emily Ydenberg Ronald C Lank David B
author_facet	Jamieson Sarah Emily Ydenberg Ronald C Lank David B
author_sort	Jamieson Sarah Emily
title	Does predation danger on southward migration curtail parental investment by female western sandpipers?
title_short	Does predation danger on southward migration curtail parental investment by female western sandpipers?
title_full	Does predation danger on southward migration curtail parental investment by female western sandpipers?
title_fullStr	Does predation danger on southward migration curtail parental investment by female western sandpipers?
title_full_unstemmed	Does predation danger on southward migration curtail parental investment by female western sandpipers?
title_sort	does predation danger on southward migration curtail parental investment by female western sandpipers?
publisher	De Gruyter
publishDate	2015
url	https://doaj.org/article/e7e5e1b8b47b40ab977715e4ea8ba39f
work_keys_str_mv	AT jamiesonsarahemily doespredationdangeronsouthwardmigrationcurtailparentalinvestmentbyfemalewesternsandpipers AT ydenbergronaldc doespredationdangeronsouthwardmigrationcurtailparentalinvestmentbyfemalewesternsandpipers AT lankdavidb doespredationdangeronsouthwardmigrationcurtailparentalinvestmentbyfemalewesternsandpipers
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Does predation danger on southward migration curtail parental investment by female western sandpipers?

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