Publications by authors named "J A HINKE"
Article Synopsis
- Researchers studied mercury (Hg) levels in Adélie, gentoo, and chinstrap penguins near Anvers Island, revealing low Hg concentrations in Adélie and gentoo penguins but higher levels in chinstrap penguins, likely due to their broader winter migrations.
- The study found that stable carbon (δC) and nitrogen (δN) isotope ratios in penguin feathers were the lowest reported for Southern Ocean penguins, indicating dietary foraging patterns influenced Hg accumulation.
- The analysis showed that δC values were the best predictor for Hg concentrations across penguin populations, highlighting how feeding ecology affects mercury levels more significantly than species or geographic differences.
Article Synopsis
- Researchers developed a new method to estimate the density of Antarctic krill from video footage taken by a chinstrap penguin in Antarctica, utilizing a machine learning model to identify krill in the frames.
- The model achieved a 73% overall accuracy and identified krill frames with an 83% positive predictive value, helping to analyze the foraging behavior of the penguin.
- The estimated krill density varied between 2 to 307 krill per cubic meter, providing insights into prey availability that could impact predator foraging efficiency, and this technique could be applied to other marine predators as well.
Background: Epstein-Barr virus (EBV) is an oncogenic virus found in about 95% of endemic Burkitt lymphoma (BL) cases. In latently infected cells, EBV DNA is mostly maintained in episomal form, but it can also be integrated into the host genome, or both forms can coexist in the infected cells.
Methods: In this study, we mapped the chromosomal integration sites of EBV (EBV-IS) into the genome of 21 EBV+ BL cell lines (BL-CL) using metaphase fluorescence in situ hybridization (FISH).
Climate change and other human activities are causing profound effects on marine ecosystem productivity. We show that the breeding success of seabirds is tracking hemispheric differences in ocean warming and human impacts, with the strongest effects on fish-eating, surface-foraging species in the north. Hemispheric asymmetry suggests the need for ocean management at hemispheric scales.
View Article and Find Full Text PDF