Biogeochemical methods using stable isotopes and trace elements have been increasingly
developed and applied to reconstruct modern and ancient breastfeeding and weaning …

Analysis of stable carbon and nitrogen isotopes from soft or mineralized tissues is a direct
and widely‐used technique for modeling diets. In addition to its continued role in paleodiet …

The finding that tissue δ15N values increase with protein catabolism has led researchers to
apply this value to gauge nutritive condition in vertebrates. However, its application to …

Understanding reproductive rates of wild animal populations is crucially important for
management and conservation. Assessing pregnancy status of free-ranging cetaceans has …

Size-and age-specific physiological constraints coupled with inexperience make the
transition to independent foraging in juvenile divers a crucial period with important …

The ever increasing interest in work in oceanography and marine biology and its relevance
to global environmental issues creates a demand for authoritative reviews summarising the …

Maintaining adequate energy and mass balance is necessary to the survival and
reproduction of any organism. However, nearly all organisms experience periods of …

In mammals, the influence of gestation and lactation on the tissue stable-isotope ratios of
females, fetuses, and milk remains poorly understood. Here we investigate the incidence of …

Abstract In Uruguay, the South American fur seal population (Arctocephalus australis) is
increasing, whereas the South American sea lion (Otaria flavescens) population is declining …

Beluga whales (Delphinapterus leucas) have a protracted nursing period estimated to last
from 6–32 months, although current estimates of beluga nursing duration are derived using …