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Per- and polyfluoroalkylated substances (PFAS) in the feathers and excreta of Gentoo penguins (Pygoscelis papua) from the Antarctic Peninsula.
Sci Total Environ
December 2024
Centro de Investigación para la Sustentabilidad (CIS-UNAB) & Department of Ecology and Biodiversity, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago 8370251, Chile; Centro de Resiliencia, Adaptación y Mitigación (CReAM), Universidad Mayor, Av. Alemania 281, Temuco, Chile.
Per- and polyfluoroalkyl substances (PFAS) exhibit widespread global distribution, extending to remote regions including Antarctica. Despite potential adverse effects on seabirds, PFAS exposure among Antarctic penguins remains poorly studied. We investigated the occurrence of 29 PFAS compounds in feathers and excreta of Gentoo penguins (Pygoscelis papua) from Fildes Bay, Antarctica.
View Article and Find Full Text PDFPlasticity syndromes in wild vertebrates: Patterns and consequences of individual variation in plasticity across multiple behaviours.
Ecol Lett
December 2024
Department of Biology, Center for Ecosystem Sentinels, University of Washington, Seattle, Washington, USA.
Behavioural plasticity is an important mechanism allowing animals to cope with changing environments. Theory has hypothesized the existence of 'plasticity syndromes'-positive correlations in plasticity across multiple behaviours within an individual-affording a generalized ability to respond to environmental change. However, the occurrence of correlated plasticities and their potential fitness consequences in natural populations remain untested.
View Article and Find Full Text PDFClimate Change Impacts Pair-Bond Dynamics in a Long-Lived Monogamous Species.
Ecol Lett
December 2024
Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA.
Climate change can influence populations of monogamous species by affecting pair-bond dynamics. This study examined the impact of climate on widowhood and divorce, and the subsequent effects on individual vital rates and life-history outcomes over 54 years in a snow petrel (Pagodroma nivea) population. We found that environmental conditions can affect pair-bond dynamics both directly and indirectly.
View Article and Find Full Text PDFNew Sesterterpenes from the Antarctic Sponge sp.
Mar Drugs
December 2024
Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE205, Tampa, FL 33620, USA.
Chemical investigation of the Antarctic sponge sp. has previously led to the identification of new suberitane derivatives, some of which show bioactivity toward respiratory syncytial virus (RSV). Our ongoing NMR-guided investigation of new specimens of the sponge resulted in the isolation of five new analogs (-), previously reported suberitenones A-D (-), and oxaspirosuberitenone ().
View Article and Find Full Text PDFFunctional characterization of the second feedback loop in the circadian clock of the Antarctic krill Euphausia superba.
BMC Biol
December 2024
Department of Biology, University of Padova, Padova, 35121, Italy.
Background: The Antarctic krill Euphausia superba is a keystone species in the Southern Ocean ecosystem. This crustacean has an ancestral clock whose main components have been identified and characterized in the past few years. However, the second feedback loop, modulating clock gene expression through two transcription factors, VRI and PDP1, has yet to be described.
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