Publications by authors named "C Bohec"
Gene expression can accelerate ecological divergence by rapidly tweaking the response of an organism to novel environments, with more divergent environments exerting stronger selection and supposedly, requiring faster adaptive responses. Organisms adapted to extreme environments provide ideal systems to test this hypothesis, particularly when compared to related species with milder ecological niches. The Emperor penguin (Aptenodytes forsteri) is the only endothermic vertebrate breeding in the harsh Antarctic winter, in stark contrast with the less cold-adapted sister species, the King penguin (A.
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- Plastics are a significant problem for many species, including seabirds, and the Southern Ocean is generally seen as less impacted due to its remote location and natural barriers.
- Recent findings indicate that two dead King penguins in the Crozet archipelago had ingested macroplastics, although these plastics likely did not directly cause their deaths.
- The study highlights the need for regular waste collection in remote environments like subantarctic islands to prevent increasing occurrences of plastic ingestion by wildlife.
Emperor penguins (Aptenodytes forsteri) are under increasing environmental pressure. Monitoring colony size and population trends of this Antarctic seabird relies primarily on satellite imagery recorded near the end of the breeding season, when light conditions levels are sufficient to capture images, but colony occupancy is highly variable. To correct population estimates for this variability, we develop a phenological model that can predict the number of breeding pairs and fledging chicks, as well as key phenological events such as arrival, hatching and foraging times, from as few as six data points from a single season.
View Article and Find Full Text PDFLike many polar animals, emperor penguin populations are challenging to monitor because of the species' life history and remoteness. Consequently, it has been difficult to establish its global status, a subject important to resolve as polar environments change. To advance our understanding of emperor penguins, we combined remote sensing, validation surveys and using Bayesian modelling, we estimated a comprehensive population trajectory over a recent 10-year period, encompassing the entirety of the species' range.
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- Oxytocin can shorten labor but may cause complications, leading researchers to investigate if stopping the drug during labor affects neonatal outcomes.
- The STOPOXY trial, conducted in 21 French maternity units, randomly assigned participants to either stop or continue oxytocin infusion after reaching 6 cm dilation, measuring neonatal morbidity based on specific health indicators at birth.
- The study included 2,170 eligible participants, finding no significant difference in neonatal morbidity between the two groups, suggesting that discontinuing oxytocin may not increase risks for newborns.