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

Jamieson, Sarah E.; Ydenberg, Ronald C.; Lank, David B.

doi:10.2478/ami-2014-0004

Cited by 11 publications

(12 citation statements)

References 36 publications

(60 reference statements)

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“…Second, for nests initiated relatively late in the season, the benefit of continuing a nesting attempt might be weighed against the optimal timing of migration. Selection for early departure on fall migration could result from predation pressure during migration or temporal trends in food availability at stopover or wintering sites (Schneider and Harrington 1981, Meltofte 1985, Lank et al 2003, Jamieson et al 2014. The nests in our study that failed to abandonment, which happened with increasing frequency over the course of the season, therefore could have been deserted by one or both parents to start migration.…”

Section: Discussionmentioning

confidence: 87%

“…Individuals that complete breeding earlier in the season may have an advantage at other times of the year. In some cases, individuals initiate but then curtail breeding attempts late in the season (Gratto-Trevor 1991, Jamieson et al 2014, indicating a life-history tradeoff where adult survival is prioritized over reproductive success, as would be expected for iteroparous species with high residual reproductive value (Saether and Bakke 2000). Like temporal patterns in conditions on the breeding grounds, selection for timing of departure on fall migration would be expected to affect all individuals in the population as conditions change.…”

Section: Introductionmentioning

confidence: 99%

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Life‐history tradeoffs revealed by seasonal declines in reproductive traits of Arctic‐breeding shorebirds

Weiser

Brown

Lanctot

et al. 2018

Journal of Avian Biology

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Seasonal declines in breeding performance are widespread in wild animals, resulting from temporal changes in environmental conditions or from individual variation. Seasonal declines might drive selection for early breeding, with implications for other stages of the annual cycle. Alternatively, selection on the phenology of nonbreeding stages could constrain timing of the breeding season and lead to seasonal changes in reproductive performance. We studied 25 taxa of migratory shorebirds (including five subspecies) at 16 arctic sites in Russia, Alaska, and Canada. We investigated seasonal changes in four reproductive traits, and developed a novel Bayesian risk-partitioning model of daily nest survival to examine seasonal trends in two causes of nest failure. We found strong seasonal declines in reproductive traits for a subset of species. The probability of laying a full four-egg clutch declined by 8-78% in 12 of 25 taxa tested, daily nest survival rates declined by 1-12% in eight of 22 taxa, incubation duration declined by 2.0-2.5% in two of seven taxa, and mean egg volume declined by 5% in one of 15 taxa. Temporal changes were not fully explained by individual variation. Across all species, the proportion of failed nests that were depredated declined over

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Life‐history tradeoffs revealed by seasonal declines in reproductive traits of Arctic‐breeding shorebirds

Weiser

Brown

Lanctot

et al. 2018

Journal of Avian Biology

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“…It is common among many Scolopacids (Hildén 1979, Ydenberg et al 2005, Meissner 2015, but see Reneerkens et al 2014) but not among passerines for example (Lehikoinen et al 2017). Early departure may reflect investment in survival and future reproductive success over current reproductive success (Jamieson et al 2014, Pakanen et al 2014) by optimizing movement in terms of food, moult, predation risk or competition (Alerstam et al 2003).…”

Section: Discussionmentioning

confidence: 99%

“…First, they may avoid competition with the large population of the alpina subspecies that stage and winter at the Wadden Sea (Hagemeijer et al 2004). Second, they may reduce predation risk (Lank et al 2003, Jamieson et al 2014 by leaving the Wadden Sea prior to mid-August before the arrival of peregrine falcons Falco peregrinus in September (van den Hout 2009), and pass the Mediterranean area before Eleonora's falcons Falco eleonorae have nestlings in late August and September (Walter 1979, Alerstam et al 2003 a period of high prey consumption (Wiehn and Korpimäki 1997). The same phenomenon may also partly explain the early departure from the breeding sites as adults leave before their main predators, the peregrine and marsh harrier Circus aeruginosus have fledglings in late July Haapala 2013, Tornberg et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Migration strategies of the Baltic dunlin: rapid jump migration in the autumn but slower skipping type spring migration

Pakanen

Jaakkonen

Saarinen

et al. 2018

Journal of Avian Biology

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Migration during spring is usually faster than during autumn because of competition for breeding territories. In some cases, however, the costs and benefits associated with the environment can lead to slower spring migration, but examples are quite rare. We compared seasonal migration strategies of the endangered Baltic population of the dunlin Calidris alpina schinzii using light‐level geolocator data from 26 individuals breeding in Finland. Autumn migration was faster, with individuals showing a ‘jump’ and ‘skipping’ migration strategy characterised by fewer stationary periods, shorter total stopping time and faster flight. Spring migration was slower, with individuals using a ‘skipping’ strategy. The duration of migration was longer for early departing birds during spring but not during autumn suggesting that early spring migrants are prevented from arriving to the breeding areas or that fueling conditions are worse on the stopover sites for early arriving individuals. Dunlins showed high migratory connectivity. All individuals had one long staging at the Wadden Sea in the autumn after which half of the individuals flew 4500 km non‐stop to Banc d’Arguin, Mauritania. The other half stopped briefly on the Atlantic coast on their way to Mauritania. One bird wintered on the coast of Portugal. Nine individuals that carried geolocators for two years were site faithful to their final non‐breeding sites. Based on the strategies during the non‐breeding period we identified, Baltic dunlin may be especially vulnerable to rapid environmental changes at the staging and non‐breeding areas. Consequently, the preservation of the identified non‐breeding areas is important for their conservation.

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“…These declines can arise due to direct or indirect effects of seasonal timing and/or differences in the quality of breeders (Verhulst & Nilsson, 2008). A direct link between the timing of breeding and reproductive performance can be viewed as a proximate response to current conditions regardless of calendar dates, or a response to date per se, with date-specific strategies driven by, for example, the time remaining to the end of food availability for chicks (Lank, Oring, & Maxson, 1985), or probability of successful fall migration for adults (Jamieson, Ydenberg, & Lank, 2014;Lank, Butler, Ireland, & Ydenberg, 2003).…”

Section: Introductionmentioning

confidence: 99%

Delayed egg‐laying and shortened incubation duration of Arctic‐breeding shorebirds coincide with climate cooling

Kwon

English

Weiser

et al. 2017

Ecology and Evolution

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Biological impacts of climate change are exemplified by shifts in phenology. As the timing of breeding advances, the within‐season relationships between timing of breeding and reproductive traits may change and cause long‐term changes in the population mean value of reproductive traits. We investigated long‐term changes in the timing of breeding and within‐season patterns of clutch size, egg volume, incubation duration, and daily nest survival of three shorebird species between two decades. Based on previously known within‐season patterns and assuming a warming trend, we hypothesized that the timing of clutch initiation would advance between decades and would be coupled with increases in mean clutch size, egg volume, and daily nest survival rate. We monitored 1,378 nests of western sandpipers, semipalmated sandpipers, and red‐necked phalaropes at a subarctic site during 1993–1996 and 2010–2014. Sandpipers have biparental incubation, whereas phalaropes have uniparental incubation. We found an unexpected long‐term cooling trend during the early part of the breeding season. Three species delayed clutch initiation by 5 days in the 2010s relative to the 1990s. Clutch size and daily nest survival showed strong within‐season declines in sandpipers, but not in phalaropes. Egg volume showed strong within‐season declines in one species of sandpiper, but increased in phalaropes. Despite the within‐season patterns in traits and shifts in phenology, clutch size, egg volume, and daily nest survival were similar between decades. In contrast, incubation duration did not show within‐season variation, but decreased by 2 days in sandpipers and increased by 2 days in phalaropes. Shorebirds demonstrated variable breeding phenology and incubation duration in relation to climate cooling, but little change in nonphenological components of traits. Our results indicate that the breeding phenology of shorebirds is closely associated with the temperature conditions on breeding ground, the effects of which can vary among reproductive traits and among sympatric species.

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

Abstract: 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 (

Cited by 11 publications

References 36 publications

Life‐history tradeoffs revealed by seasonal declines in reproductive traits of Arctic‐breeding shorebirds

Life‐history tradeoffs revealed by seasonal declines in reproductive traits of Arctic‐breeding shorebirds

Migration strategies of the Baltic dunlin: rapid jump migration in the autumn but slower skipping type spring migration

Delayed egg‐laying and shortened incubation duration of Arctic‐breeding shorebirds coincide with climate cooling

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