The liver controls the systemic exposure of amino acids entering via the gastro-intestinal
tract. For most amino acids except branched chain amino acids, hepatic uptake is very …

The development of the isotopic niche, an n-dimensional hypervolume (with n being the
number of isotopes) occupied by a population in delta space, has revolutionized the study of …

Stable isotope analysis (SIA) is widely used to assess animal diet and movements, requiring
accurate estimates of trophic discrimination factors (TDFs). Since TDFs are only available for …

Neanderthals are known primarily from their habitation of Western Eurasia, but they also
populated large expanses of Northern Asia for thousands of years. Owing to a sparse …

Great hammerhead sharks Sphyrna mokarran are the largest member of Sphyrnidae, yet the
roles of these large sharks in the food webs of coastal ecosystems are still poorly …

Abstract Changes in the nutritional status of free-ranging animals have a strong influence on
individual fitness, yet it remains challenging to monitor longitudinally. Nitrogen (δ 15 N) and …

The isotopic niche has become an established concept in trophic ecology. However, the
assumptions behind this approach have rarely been evaluated. Evidence is accumulating …

Seasonality could play a crucial role in structuring species interactions. For example, many
ectotherms alter their activity, habitat, and diet in response to seasonal temperature …

Objective To reconstruct breastfeeding and weaning practices, metabolic stress including
tuberculosis-induced wasting, and residential mobility of children in Neolithic and Metal …

Hydrogen isotope geolocation of insects is based on the assumption that the chitin in the
wings of adult migratory insects preserves the hydrogen isotope composition (δ 2H) of the …