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Not just fuel : energy stores are correlated with immune function and oxidative damage in a long-distance migrant.

Eikenaar, Cas; Hegemann, Arne LU ; Packmor, Florian; Kleudgen , Iris and Isaksson, Caroline LU (2019) In Current Zoology
Abstract
In many animals, catabolic and anabolic periods are temporally separated. Migratory birds alternate energy expenditure during flight with energy accumulation during stopover. The size of the energy stores at stopover affects the decision to resume migration and thus the temporal organization of migration. We now provide data suggesting that it is not only the size of the energy stores per se that may influence migration scheduling, but also the physiological consequences of flying. In two subspecies of the northern wheatear
Oenanthe oenanthe, a long-distance migrant, estimated energy stores at a stopover during autumn migration were positively related with both
constitutive innate and acquired immune function, and negatively... (More)
In many animals, catabolic and anabolic periods are temporally separated. Migratory birds alternate energy expenditure during flight with energy accumulation during stopover. The size of the energy stores at stopover affects the decision to resume migration and thus the temporal organization of migration. We now provide data suggesting that it is not only the size of the energy stores per se that may influence migration scheduling, but also the physiological consequences of flying. In two subspecies of the northern wheatear
Oenanthe oenanthe, a long-distance migrant, estimated energy stores at a stopover during autumn migration were positively related with both
constitutive innate and acquired immune function, and negatively related with oxidative damage to lipids. In other words, migrants’ physiological condition was associated with their energetic condition. Although time spent at stopover before sampling may have contributed to this relationship, our results suggest that migrants have to trade-off the depletion of energy stores during flight with
incurring physiological costs. This will affect migrants’ decisions when to start and when to terminate a migratory flight. The physiological costs associated with the depletion of energy stores may also help explaining why migrants often arrive at and depart from stopover sites with larger energy stores than expected. We propose that studies on the role of energy stores as drivers of the temporal organization of (avian) migration need to consider physiological condition, such as immunological and oxidative states. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Current Zoology
pages
8 pages
publisher
Current Zoology
ISSN
1674-5507
DOI
10.1093/cz/zoz009
language
English
LU publication?
yes
id
f8fb2180-62de-4eea-a3c8-1b0822dcf72c
date added to LUP
2019-10-02 13:35:09
date last changed
2019-10-02 18:11:12
@article{f8fb2180-62de-4eea-a3c8-1b0822dcf72c,
  abstract     = {In many animals, catabolic and anabolic periods are temporally separated. Migratory birds alternate energy expenditure during flight with energy accumulation during stopover. The size of the energy stores at stopover affects the decision to resume migration and thus the temporal organization of migration. We now provide data suggesting that it is not only the size of the energy stores per  se that may influence migration scheduling, but also the physiological consequences of flying. In two subspecies of the northern wheatear<br/>Oenanthe oenanthe, a long-distance migrant, estimated energy stores at a stopover during autumn migration were positively related with both<br/>constitutive innate and acquired immune function, and negatively related with oxidative damage to lipids. In other words, migrants’ physiological condition was associated with their energetic condition. Although time spent at stopover before sampling may have contributed to this relationship, our results suggest that migrants have to trade-off the depletion of energy stores during flight with<br/>incurring physiological costs. This will affect migrants’ decisions when to start and when to terminate a migratory flight. The physiological costs associated with the depletion of energy stores may also help explaining why migrants often arrive at and depart from stopover sites with larger energy stores than expected. We propose that studies on the role of energy stores as drivers of the temporal organization of (avian) migration need to consider physiological condition, such as immunological and oxidative states.},
  articleno    = { zoz009},
  author       = {Eikenaar, Cas and Hegemann, Arne and Packmor, Florian and Kleudgen , Iris and Isaksson, Caroline},
  issn         = {1674-5507},
  language     = {eng},
  pages        = {8},
  publisher    = {Current Zoology},
  series       = {Current Zoology},
  title        = {Not just fuel : energy stores are correlated with immune function and oxidative damage in a long-distance migrant.},
  url          = {http://dx.doi.org/10.1093/cz/zoz009},
  year         = {2019},
}