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Does Climate Change Initiate Migratory Tradeoffs that Influence Reproduction in a Long-distance Migratory Shorebird, the Hudsonian Godwit (Limosa Haemastica)?

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Abstract
Climate change induced shifts in resource phenology threatens to negatively impact migratory species that are unable to alter their migratory and reproductive timing accordingly. Yet, many long-distance migrants are not advancing their reproductive timing at the same rates as their migratory timing. Some long-distance migrants may only be able to alter their migratory timing through costly en route decisions, presenting individuals with a tradeoff between early arrival and arrival body condition. For species that exhibit mate fidelity and rapid clutch initiation, arriving to the breeding grounds in poor condition may affect sexes differently, constraining advances in reproductive timing. Little is known, however, about the potential sex-specific effects of climate change on migrants and how they may influence reproduction. Thus, I utilized long-term tracking data in combination with isotope analyses to investigate whether there is a tradeoff between arrival timing and body condition that influences reproduction in a breeding population of Hudsonian Godwits (Limosa haemastica).
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Thesis (Open Access)
Date
2024-09
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Attribution 4.0 International
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http://creativecommons.org/licenses/by/4.0/
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