Build-up of red cells in refuelling Bar-tailed Godwits in relation to individual migratory quality
Article Abstract:
High levels of red blood cells are essential for quick refueling and long-distance flights in Bar-tailed Godwits (Limosa lapponica). Birds migrating from West Africa to Siberia stop over at the Wadden Sea, Netherlands. Those that arrive in the Netherlands on time have higher hemoglobin and hematocrit levels than those arriving late. The body mass and hemoglobin levels rise in the late-arriving non-molting birds during the staging period. Molting birds have a higher body mass though the hemoglobin levels of molting and non-molting birds are comparable before departure to the breeding sites. Long-distance travel probably produces mild anemia.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1996
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Red breasts as honest signals of migratory quality in a long-distance migrant, the Bar-tailed Godwit
Article Abstract:
The relation of the Bar-tailed Godwit's pre-nuptial molt to its plumage color, nutritional status and migration schedule was investigated. Bar-tailed Godwits were captured in Mauritania, WestAfrica and subsequently banded, measured and weighed. A series of seven variables of various aspects of plumage and molt was also recorded from all captured birds. Results revealed that the birds' nutrient reserves strongly affect their ability to upgrade their plumage on the staging areas.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1993
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Water balance during real and simulated long-distance migratory flight in the Bar-tailed Godwit
Article Abstract:
Research is presented concerning the effect of dehydration on migrating Bar-tailed Godwits. The use of model simulations to study the ability of the birds to control water loss and fly long distances is discussed.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 2000
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