Body stores persist as fitness correlate in a long-distance migrant released from food constraints

Adriaan M. Dokter, Wimke Fokkema, Steven K. Bekker, Willem Bouten, Barwolt S. Ebbinge, Gerard Müskens, Han Olff, Henk P. van der Jeugd, Bart A. Nolet

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Long-distance migratory birds rely on the acquisition of body stores to fuel their migration and reproduction. Breeding success depends on the amount of body stores acquired prior to migration, which is thought to increase with access to food at the fueling site. Here, we studied how food abundance during fueling affected time budgets and reproductive success. In a regime of plenty, we expected that 1) limitations on food harvesting would become lifted, allowing birds to frequently idle, and 2) birds would reach sufficient fuel loads, such that departure weight would no longer affect reproductive success. Our study system comprised brent geese (Branta b. bernicla) staging on high-quality agricultural pastures. Fueling conditions were assessed by a combination of high-resolution GPS tracking, acceleration-based behavioral classification, thermoregulation modeling, and measurements of food digestibility and excretion rates. Mark-resighting analysis was used to test for correlations between departure weight and offspring recruitment. Our results confirm that birds loafed extensively, actively postponed fueling in early spring, and took frequent digestion pauses, suggesting that traditional time constraints on harvest and fueling rates are absent on modern-day fertilized grasslands. Nonetheless, departure weight remained correlated with recruitment success. The persistence of this correlation after a prolonged stopover with access to abundant high-quality food, suggests that between-individual differences in departure condition are not so much enforced by food quality and availability during stopover, but reflect individual quality and longer-lived life-history traits, such as health status and digestive capacity, which may be developed before the fueling period.

LanguageEnglish
Pages1157-1166
JournalBehavioral Ecology
Volume29
Issue number5
DOIs
Publication statusPublished - 10 Sep 2018

Fingerprint

fitness
reproductive success
stopover
food quality
food
birds
bird
Branta
thermoregulation
geese
health status
food availability
digestibility
excretion
grasslands
digestion
life history trait
life history
pastures
taxonomy

Keywords

  • arctic waterfowl
  • carry-over effects
  • cultivated grassland
  • GPS tracking
  • migratory fueling
  • recruitment

Cite this

Dokter, Adriaan M. ; Fokkema, Wimke ; Bekker, Steven K. ; Bouten, Willem ; Ebbinge, Barwolt S. ; Müskens, Gerard ; Olff, Han ; van der Jeugd, Henk P. ; Nolet, Bart A. / Body stores persist as fitness correlate in a long-distance migrant released from food constraints. In: Behavioral Ecology. 2018 ; Vol. 29, No. 5. pp. 1157-1166.
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abstract = "Long-distance migratory birds rely on the acquisition of body stores to fuel their migration and reproduction. Breeding success depends on the amount of body stores acquired prior to migration, which is thought to increase with access to food at the fueling site. Here, we studied how food abundance during fueling affected time budgets and reproductive success. In a regime of plenty, we expected that 1) limitations on food harvesting would become lifted, allowing birds to frequently idle, and 2) birds would reach sufficient fuel loads, such that departure weight would no longer affect reproductive success. Our study system comprised brent geese (Branta b. bernicla) staging on high-quality agricultural pastures. Fueling conditions were assessed by a combination of high-resolution GPS tracking, acceleration-based behavioral classification, thermoregulation modeling, and measurements of food digestibility and excretion rates. Mark-resighting analysis was used to test for correlations between departure weight and offspring recruitment. Our results confirm that birds loafed extensively, actively postponed fueling in early spring, and took frequent digestion pauses, suggesting that traditional time constraints on harvest and fueling rates are absent on modern-day fertilized grasslands. Nonetheless, departure weight remained correlated with recruitment success. The persistence of this correlation after a prolonged stopover with access to abundant high-quality food, suggests that between-individual differences in departure condition are not so much enforced by food quality and availability during stopover, but reflect individual quality and longer-lived life-history traits, such as health status and digestive capacity, which may be developed before the fueling period.",
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Dokter, AM, Fokkema, W, Bekker, SK, Bouten, W, Ebbinge, BS, Müskens, G, Olff, H, van der Jeugd, HP & Nolet, BA 2018, 'Body stores persist as fitness correlate in a long-distance migrant released from food constraints', Behavioral Ecology, vol. 29, no. 5, pp. 1157-1166. https://doi.org/10.1093/beheco/ary080

Body stores persist as fitness correlate in a long-distance migrant released from food constraints. / Dokter, Adriaan M.; Fokkema, Wimke; Bekker, Steven K.; Bouten, Willem; Ebbinge, Barwolt S.; Müskens, Gerard; Olff, Han; van der Jeugd, Henk P.; Nolet, Bart A.

In: Behavioral Ecology, Vol. 29, No. 5, 10.09.2018, p. 1157-1166.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Body stores persist as fitness correlate in a long-distance migrant released from food constraints

AU - Dokter, Adriaan M.

AU - Fokkema, Wimke

AU - Bekker, Steven K.

AU - Bouten, Willem

AU - Ebbinge, Barwolt S.

AU - Müskens, Gerard

AU - Olff, Han

AU - van der Jeugd, Henk P.

AU - Nolet, Bart A.

PY - 2018/9/10

Y1 - 2018/9/10

N2 - Long-distance migratory birds rely on the acquisition of body stores to fuel their migration and reproduction. Breeding success depends on the amount of body stores acquired prior to migration, which is thought to increase with access to food at the fueling site. Here, we studied how food abundance during fueling affected time budgets and reproductive success. In a regime of plenty, we expected that 1) limitations on food harvesting would become lifted, allowing birds to frequently idle, and 2) birds would reach sufficient fuel loads, such that departure weight would no longer affect reproductive success. Our study system comprised brent geese (Branta b. bernicla) staging on high-quality agricultural pastures. Fueling conditions were assessed by a combination of high-resolution GPS tracking, acceleration-based behavioral classification, thermoregulation modeling, and measurements of food digestibility and excretion rates. Mark-resighting analysis was used to test for correlations between departure weight and offspring recruitment. Our results confirm that birds loafed extensively, actively postponed fueling in early spring, and took frequent digestion pauses, suggesting that traditional time constraints on harvest and fueling rates are absent on modern-day fertilized grasslands. Nonetheless, departure weight remained correlated with recruitment success. The persistence of this correlation after a prolonged stopover with access to abundant high-quality food, suggests that between-individual differences in departure condition are not so much enforced by food quality and availability during stopover, but reflect individual quality and longer-lived life-history traits, such as health status and digestive capacity, which may be developed before the fueling period.

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KW - arctic waterfowl

KW - carry-over effects

KW - cultivated grassland

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