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Carry-over effects as drivers of fitness differences in animals.
TLDR
Carry-over effects are likely to be far more widespread than currently indicated, and they could feasibly be responsible for a large amount of the observed variation in performance among individuals, and warrant a wealth of new research designed specifically to decompose components of variation in fitness attributes related to processes across and within seasons.
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Tropical winter habitat limits reproductive success on the temperate breeding grounds in a migratory bird
TLDR
It is shown that the reproductive success of a long‐distance migratory bird is influenced by the quality of habitat located thousands of kilometres away on tropical wintering grounds, which affected key variables associated with reproduction, including the number of young fledged.
View on Royal Society
Carry-over effects and habitat quality in migratory populations
TLDR
Simulations show that carry-over effects can have a relative, positive impact on population size when the majority of habitat that is lost in the previous season is low quality, buffering the population from severe declines.
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Reproductive Effort, Molting Latitude, and Feather Color in a Migratory Songbird
TLDR
It is shown how reproduction in a migratory animal can influence both life history strategies (location of molt) and social signals (feather color) during subsequent periods of the annual cycle.
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The motus wildlife tracking system: A collaborative research network to enhance the understanding of wildlife movement
We describe a new collaborative network, the Motus Wildlife Tracking System (Motus; https://motus.org), which is an international network of researchers using coordinated automated radio-telemetry…
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Unravelling the annual cycle in a migratory animal: breeding-season habitat loss drives population declines of monarch butterflies.
TLDR
A spatially structured, stochastic and density-dependent periodic projection matrix model that integrates patterns of migratory connectivity and demographic vital rates across the annual cycle is developed and suggests that mitigating the negative effects of genetically modified crops results in higher population size and lower extinction risk.
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Tracking multi-generational colonization of the breeding grounds by monarch butterflies in eastern North America
TLDR
It is shown that butterflies which overwintered in Mexico came from a wide breeding distribution, including southern portions of the range, which indicated that conserving breeding habitat in the Midwest alone is insufficient to ensure long-term persistence of the monarch butterfly population in eastern North America.
View on Royal Society
Population dynamics in migratory networks
TLDR
A population model composed of a network of breeding and wintering sites is developed to show how habitat loss affects patterns of connectivity and species abundance and provides strong evidence that estimating population connectivity is a prerequisite for successfully predicting changes in migratory populations.
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Storms drive altitudinal migration in a tropical bird
TLDR
A novel mechanism that could link storms to mortality risks via reductions in foraging time and the first tests of this hypothesis are provided in the White-ruffed Manakin (Corapipo altera), a small partially migratory frugivore breeding on the Atlantic slope of Costa Rica.
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Hydrogen isotopic variation in migratory bird tissues of known origin: implications for geographic assignment
TLDR
It is concluded that feathers sampled from recently hatched juveniles may not provide a reliable estimate of expected local isotopic signatures for comparison with adult feathers of unknown origin, and it is suggested that the best approach is to assign individuals to broad geographic zones within a species’ potential molting range.
View on Springer
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