The nature of the migration route shapes physiological traits and aerodynamic properties in a migratory songbird

Corman, Anna‐Marie; Bairlein, Franz; Schmaljohann, Heiko

doi:10.1007/s00265-013-1653-z

Cited by 43 publications

(40 citation statements)

References 73 publications

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“…Similarly, why do we observe subspecies specific FDR under controlled conditions ( Fig. 2; Corman et al 2014)? A possible answer to these questions is that there may be costs to rapid refueling in terms of oxidative stress; high caloric intake is known to increase oxidative stress (e.g., Sohal and Weindruch 1996;Masoro 2002).…”

Section: Discussionmentioning

confidence: 72%

“…Even though environmental variables, most notably food availability, put limits on how much FDR can be increased (Lindström 2003), FDR appears to be more flexible than previously anticipated. For example, FDR has been found to change with the progress of the migration season (e.g., Schaub and Jenni 2000;Corman et al 2014; this study). Our study now also revealed that migrants can adjust their FDR to the extent of fuel loss they experienced prior to refueling.…”

Section: Discussionmentioning

confidence: 90%

“…It should be noted that in spring on Helgoland, the same subspecies difference in refueling exists: Both sexes of leucorhoa wheatears have a greater food intake and higher FDR than oenanthe wheatears (Corman et al 2014). The most likely reason for the subspecies difference in FDR in spring is that they differ greatly in the Fig.…”

Section: Discussionmentioning

confidence: 92%

“…Inter-individual variation in FDR has been attributed to environmental factors such as food availability, weather, and predation pressure, as well as intrinsic factors such as moult and body mass (reviewed in Jenni and Schaub 2003;Alerstam 2011). Furthermore, the urge to refuel depends on the remaining distance to be traveled likely triggered via the current magnetic conditions (Fransson et al 2001), especially when birds come upon an ecological barrier, such as a desert (Fry et al 1970) or a sea (Corman et al 2014). Similarly, but so far unexplored, the urge to refuel may also depend on the amount of fuel lost during the flight preceding stopover, especially when fuel loss is considerable, e.g., after long flights over a barrier.…”

Section: Introductionmentioning

confidence: 97%

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Fuel loss and flexible fuel deposition rates in a long-distance migrant

Eikenaar

Klinner

Lille

et al. 2014

Behav Ecol Sociobiol

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Most migrating birds alternate flight bouts with stopovers, during which they rest and replenish the fuel used during flight (refueling). The rate of refueling (fuel deposition rate, FDR) affects stopover duration, and hence is an important determinant of the overall time required for migration. Although environmental and endogenous factors affect FDR, the urge to refuel depends on the anticipated distance to be travelled and possibly also on the amount of fuel used during the flight preceding stopover. Combining a field study with a fasting-refueling experiment on long-term captive songbirds, we tested whether the extent of fuel loss prior to refueling indeed affects FDR. In the field study, we took a comparative approach and determined FDR in two subspecies of northern wheatear (Oenanthe oenanthe) that differ greatly in the distance flown, and thus the extent of fuel used to reach our study (stopover) site. As both winter in western sub-Sahelian Africa, they face the same remaining migration distance. We found that FDR was higher in the subspecies that uses more fuel to get to our study site. Solidifying this result, in the experiment on captive northern wheatears, we found that the extent of fuel loss as a consequence of fasting explained most of the variation in subsequent FDR. The observation that experimental birds losing little fuel did not maximize their FDR suggests there are costs to rapid refueling. Our study shows that FDR is shaped not just by current environmental and endogenous conditions but also by fuel loss prior to refueling.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 97%

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Fuel loss and flexible fuel deposition rates in a long-distance migrant

Eikenaar

Klinner

Lille

et al. 2014

Behav Ecol Sociobiol

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“…The 4,000-5,000 km barrier between its Nearctic breeding grounds (Godfrey 1986) and sub-Saharan wintering grounds in western Africa has led to many discussions regarding this subspecies' migration routes. Given that wheatears are seen regularly on the west coast of Europe, even east of Britain, in spring and autumn (Dierschke et al 2011, Corman et al 2014), a detour via Europe to reduce the sea-barrier distance seems reasonable and was suggested by Williamson (1958) and Alerstam (2001). Supporting evidence is given by one Canadian wheatear recently tracked with a light-level geolocator crossing, most likely southern Greenland and continuing via Europe toward its African wintering area .…”

Section: Introductionmentioning

confidence: 95%

Can wheatears weather the Atlantic? Modeling nonstop trans-Atlantic flights of a small migratory songbird

Bulte¹,

McLaren²,

Bairlein³

et al. 2014

The Auk

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Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

Perlut

Maxwell

Kovach

et al. 2023

Ecology and Evolution

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Little is known about the causes and consequences of alternative pathways flown by long-distance migratory birds. Bobolinks (Dolichonyx oryzivorus) breed in grasslands across northern North America and migrate from their breeding grounds toward the eastern Atlantic Coast and then proceed through the Caribbean to South America. However, a small but regular number of Bobolinks have been recorded on the Galapagos Islands. We collected genetic samples from nine Galapagos Bobolinks and performed double-digest restriction site-associated sequencing. We compared them with samples from seven locations across their breeding distribution to determine their population of origin. Galapagos Bobolinks shared the genetic structure of a cluster in the eastern portion of the breeding range that includes New Brunswick and Ontario, Canada, and Vermont, United States. Genetic assignment tests largely corroborated this finding, although slightly different results were obtained for the two methods. All individuals were assigned to the Ontario breeding population using AssignPop, while Rubias assigned six of the migrants to Ontario and three to a Midwest breeding population. Low average relatedness among Galapagos individuals indicates that they are not more related to one another than to individuals within a breeding population and are therefore likely not from a single, small isolated population. Our results do not support the probability hypothesis-that Galapagos Bobolinks originated from the region that includes the greatest proportion of their breeding range (Great Plains)-or the vagrant hypothesis-that migrants are displaced onto Galapagos due to weather events. Instead, our findings support the proximity hypothesis, where migrants originate from the geographically closest-breeding populations.

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The nature of the migration route shapes physiological traits and aerodynamic properties in a migratory songbird

Cited by 43 publications

References 73 publications

Fuel loss and flexible fuel deposition rates in a long-distance migrant

Fuel loss and flexible fuel deposition rates in a long-distance migrant

Can wheatears weather the Atlantic? Modeling nonstop trans-Atlantic flights of a small migratory songbird

Breeding origins of a uniquely regular migrant songbird in the Galápagos Islands

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