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STOPOVER ECOLOGY OF MIGRATING BIRDS: SOME UNSOLVED QUESTIONS
in Israel Journal of Ecology and EvolutionSearch for other papers by ÅKE LINDSTRÖM in
Current site
Google Scholar
Stopover ecology, that is, the ecology of birds at resting sites visited between migratory flights, has received relatively little attention in comparison with other fields of bird migration. In this review I discuss a few unsolved questions concerning stopover ecology: (1) Which are the selective forces acting on birds during migration? Several studies have shown that time-minimization may be important. The importance and occurrence of minimizing energy consumption among migrants remains unknown. (2) What causes the initial body mass loss upon arrival at a stopover site? Handling effects can not be ruled out, but several studies hint at ecologically interesting phenomena, such as food-competition and social interactions. (3) How fast can birds increase in mass? Metabolic constraints limit fat deposition rates in migrants, and maximum fat deposition rates are higher in smaller birds than in larger ones. The interplay between the size of the metabolic machinery (reflected in the basal metabolic rates) and fat deposition rates needs to be addressed. In the field of stopover ecology there is a general need for more theories predicting stopover behavior. More experiments are also wanted which can be used to test predictions and disentangle the often complex relationship among factors influencing birds on stopover.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 710 | 81 | 8 |
| Gesamttextansichten | 19 | 1 | 0 |
| PDF-Downloads | 29 | 2 | 0 |
STOPOVER ECOLOGY OF MIGRATING BIRDS: SOME UNSOLVED QUESTIONS
in Israel Journal of Ecology and EvolutionSearch for other papers by ÅKE LINDSTRÖM in
Current site
Google Scholar
PubMed
Stopover ecology, that is, the ecology of birds at resting sites visited between migratory flights, has received relatively little attention in comparison with other fields of bird migration. In this review I discuss a few unsolved questions concerning stopover ecology: (1) Which are the selective forces acting on birds during migration? Several studies have shown that time-minimization may be important. The importance and occurrence of minimizing energy consumption among migrants remains unknown. (2) What causes the initial body mass loss upon arrival at a stopover site? Handling effects can not be ruled out, but several studies hint at ecologically interesting phenomena, such as food-competition and social interactions. (3) How fast can birds increase in mass? Metabolic constraints limit fat deposition rates in migrants, and maximum fat deposition rates are higher in smaller birds than in larger ones. The interplay between the size of the metabolic machinery (reflected in the basal metabolic rates) and fat deposition rates needs to be addressed. In the field of stopover ecology there is a general need for more theories predicting stopover behavior. More experiments are also wanted which can be used to test predictions and disentangle the often complex relationship among factors influencing birds on stopover.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 710 | 81 | 8 |
| Gesamttextansichten | 19 | 1 | 0 |
| PDF-Downloads | 29 | 2 | 0 |
