Historical overexploitation of marine mammals, combined with present-day pressures, has
resulted in severely depleted populations, with many species listed as threatened or …

Rationale A liquid chromatography/tandem mass spectrometry (LC/MS/MS) method was
validated and utilized to measure and analyze four steroid hormones related to stress and …

In order to provide a more reliable, non-invasive method for defining the reproductive phase
and determining the optimum time of ovulation, fifteen (15) apparently normal, non-pregnant …

Background Pacific walruses are found in Arctic regions of the Chukchi and Bering Sea
where rapid changes in environmental conditions resulting in loss of sea ice are occurring …

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

Long-term monitoring of circulating progesterone levels in three captive female false killer
whales, Pseudorca crassidens, was conducted to characterize their reproductive events and …

Abstract The Pacific walrus (Odobenus rosmarus divergens) is an iconic Arctic marine
mammal and an important resource to many Alaska Natives. A decrease in sea ice habitat …

Determining reproductive rates of marine mammal populations can give insight into their
persistence and resilience in changing environments. As our marine environments continue …

The ability to monitor the estrus cycle in wild and captive marine species is important for
identifying reproductive failures, ensuring a successful breeding program, and monitoring …

Endocrine profiling is an increasingly utilized tool for detecting pregnancies in wild
populations of mammals. Given the difficulty in calculating reproductive rates of Pacific …