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The Influence of Migration Timing and Local Conditions on Reproductive Timing in Arctic-Breeding Birds.
Ecol Evol
January 2025
Wildlife Research Division Environment and Climate Change Canada Ottawa Ontario Canada.
For birds breeding in the Arctic, nest success is affected by the timing of nest initiation, which is partially determined by local conditions such as snow cover. However, conditions during the non-breeding season can carry over to affect the timing of breeding. We used tracking and breeding data from 248 individuals of 8 species and subspecies of Arctic-breeding shorebirds to estimate how the timing of nest initiation is related to local conditions like snowmelt phenology versus prior conditions, measured by the timing and speed of migration.
View Article and Find Full Text PDFDelayed post-juvenile moult in malaria-infected Eurasian blackcaps.
Proc Biol Sci
January 2025
Department of Biodiversity, Ecology and Evolution, Complutense University of Madrid, Madrid, Spain.
Parasites have their strongest impact on fitness when host defences deplete resources needed for other critical life-history stages, such as development, breeding or migration. Among birds, one greatly neglected stage that could be altered by parasites is post-juvenile moult (PJM), through which yearling juvenile birds replace their fast-generated, low-quality juvenile feathers with adult-like feathers after leaving the nest. The earlier the birds complete PJM, the earlier they will be prepared to withstand forthcoming challenges, such as adverse winter conditions or migration.
View Article and Find Full Text PDFIntrinsic timing of brood care in shell-dwelling cichlids.
Curr Biol
January 2025
Max Planck Institute for Biological Intelligence, 82152 Martinsried, Germany. Electronic address:
Brood care relies on interactions between parents and offspring. Emergence of nestlings from their nest has been hypothesized to rely on the readout by the parent of the maturational state of the young. Theoretical considerations predict a conflict: parents should push for early emergence, if possible, to reduce care demands and maximize the number of reproductive cycles, whereas offspring should delay leaving to maximize resource allocation and protection by the parents.
View Article and Find Full Text PDFHeat-sterilizable antibody mimics designed on the cold shock protein scaffold from hyperthermophile Thermotoga maritima.
Protein Sci
January 2025
Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan.
Antibodies and antibody mimics are extensively used in the pharmaceutical industry, where stringent safety standards are required. Implementing heat sterilization during or after the manufacturing process could help prevent contamination by viruses and bacteria. However, conventional antibodies and antibody mimics are not suitable for heat sterilization because they irreversibly denature at high temperatures.
View Article and Find Full Text PDFPolarised moonlight guides nocturnal bull ants home.
Elife
December 2024
School of Natural Sciences, Macquarie University, Sydney, Australia.
For the first time in any animal, we show that nocturnal bull ants use the exceedingly dim polarisation pattern produced by the moon for overnight navigation. The sun or moon can provide directional information via their position; however, they can often be obstructed by clouds, canopy, or the horizon. Despite being hidden, these bodies can still provide compass information through the polarised light pattern they produce/reflect.
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