Knowledge of baleen whales' reproductive physiology is limited and requires long-term
individual-based studies and innovative tools. We used 6 years of individual-level data on …

Fecal samples are a non-invasive and relatively accessible matrix for investigating
physiological processes in resident killer whale (Orcinus orca) populations. The high lipid …

Simple Summary Our society is increasingly concerned about the well-being of animals like
dolphins, which can be affected by life under professional human care or by anthropogenic …

Male mammals of seasonally reproducing species typically have annual testosterone (T)
cycles, with T usually peaking during the breeding season, but occurrence of such cycles in …

Reproductive data are vital for fisheries and conservation management. For cephalopods,
reproductive data are usually obtained by analyzing gonads, which only provide data on an …

Hormone monitoring of at-risk species can be valuable for evaluation of individual
physiological status. Traditional non-invasive endocrine monitoring from urine and faeces …

Understanding wildlife reproductive seasonality is crucial for effective management and long-
term monitoring of species. This study investigates the seasonal variability of testosterone in …

Individual-level assessments of wild animal health, vital rates, and foraging ecology are
critical for understanding population-wide impacts of exposure to stressors. Large whales …

Monitoring hormone concentrations in marine mammals provides valuable information
regarding reproductive status and health. Skin is potentially useful for measuring hormone …

Endocrine tools can provide an avenue to better understand mammalian life histories and
predict how individuals and populations may respond to environmental stressors; however …