Rising fecal glucocorticoid concentrations track reproductive activity in the female giant panda (Ailuropoda melanoleuca).

摘要: Abstract To better understand the adaptive significance of adrenal glucocorticoid (GC) variation in giant panda, we assessed patterns fecal GC excretion over time as well during estrus, parturient and non-parturient luteal phases, lactation acyclicity 17 adult females. Fecal estrogen were positively correlated ( P r  = 0.57–0.92). Among all reproductive states, was highest  > 0.05). Concentrations metabolites lower  > 0.05) across seasons, there seasonal variations values between reproductively cyclic acyclic females did not support hypothesis that ovarian is due to increased activity (related or unrelated physiological stress). Furthermore, GCs may play an important role normal endocrine milieu associated with sexual receptivity late pregnancy. These data demonstrate both status factors are modulators function this endangered species.