Why females of some species cease ovulation before the end of their natural lifespan is a
longstanding evolutionary puzzle. For many species in captivity, post-reproductive life is …

Captive breeding for species of conservation concern is the act of bringing rare or
endangered animals into captivity with the hope of rearing sustained captive populations for …

During the past two decades, techniques for faecal steroid analysis have been developed
and have been used for research with mammalian, bird and, to a lesser extent, reptile …

Human menopause is remarkable in that reproductive senescence is markedly accelerated
relative to somatic aging, leaving an extended postreproductive period for a large proportion …

An important adaptive problem for mammals in general, and primates in particular, is how
females can manage the high costs of reproduction in the face of fluctuating energetic …

The microbiome regulates endocrine systems and influences many aspects of hormone
signaling. Using examples from different animal taxa, we highlight the state of the science in …

Zoos and other ex situ wildlife institutions can play an important role in species conservation
by maintaining populations for education and research, as sources for potential re …

This comparative analysis evaluated endocrine profiles and gestation length data of captive
pregnant black rhinoceros (Diceros bicornis), white rhinoceros (Ceratotherium simum), and …

This paper summarizes the recent status of rhinoceros species, as provided by IUCN
Species Survival Commission's Rhinoceros Specialist Groups, and describes some of the …

Hormone monitoring is a well established tool for evaluating endocrine activity of wildlife,
and has substantially enhanced captive management and propagation of a number of …