• Androgen and glucocorticoid production in the male killer whale (Orcinus orca): influence of age, maturity, and environmental factors

      O'Brien J. K.; Steinman K. J.; Fetter, G. Alan; Robeck T. R. (2016)
      Circulating concentrations of testosterone and its precursor androstenedione, as well as dehydroepiandrosterone (DHEA ) and the adrenal hormones cortisol and corticosterone were measured at monthly intervals in 14 male killer whales (Orcinus orca ) aged 0.8–38 years. Analyses were performed for examination of the relationships of age, sexual maturation status (STATUS ), season, and environmental temperature (monthly air ambient temperature, A‐TEMP ) with hormone production using a mixed effects linear regression model with animal ID as the random variable....
    • Anthropogenic change alters ecological relationships via interactive changes in stress physiology and behavior within and among organisms

      Hammond, Talisin T.; Ortiz-Jimenez, Chelsea A; Smith, Jennifer E (2020)
      ...Human-induced changes in the stress physiology of one species and the downstream impacts on behavior can therefore interact with the physiological and behavioral responses of other organisms to alter emergent ecological phenomena. Here, we highlight three scenarios in which the stress physiology and behavior of individuals on different sides of an ecological relationship are interactively impacted by anthropogenic change....
    • Differential success in obtaining gametes between male and female Australian temperate frogs by hormonal induction: A review

      Clulow, John; Pomering, Melissa; Herbert, Danielle; Upton, Rose; Calatayud, Natalie E.; Clulow, Simon; Mahony, Michael J.; Trudeau, Vance L. (2018)
      Most Australian frogs fall into two deeply split lineages, conveniently referred to as ground frogs (Myobatrachidae and Limnodynastidae) and tree frogs (Pelodryadidae). Species of both lineages are endangered because of the global chytrid pandemic, and there is increasing interest and research on the endocrine manipulation of reproduction to support the use of assisted reproductive technologies in conservation....
    • Identification of California condor estrogen receptors 1 and 2 and their activation by endocrine disrupting chemicals

      Felton, Rachel G.; Steiner, Cynthia C.; Durrant, Barbara S.; Keisler, Duane H.; Milnes, Matthew R.; Tubbs, Christopher W. (2015)
      ...There is evidence that coastal-dwelling condors experience reproductive issues, such as eggshell thinning, likely resulting from exposure to endocrine-disrupting chemicals (EDCs). To address this problem, we have identified and cloned condor estrogen receptors (ESRs) 1 and 2 and characterized their activation by EDCs present in the coastal habitats where condors reside....
    • Regulation of endocrine systems by the microbiome: Perspectives from comparative animal models

      Williams, Candace L.; Garcia-Reyero, Natàlia; Martyniuk, Christopher J.; Tubbs, Christopher W.; Bisesi, Joseph H. (2020)
      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 microbiome research as it relates to endocrinology and endocrine disruption research....
    • Reproductive impacts of endocrine-disrupting chemicals on wildlife species: Implications for conservation of endangered species

      Tubbs, Christopher W.; McDonough, Caitlin E. (2018)
      Wildlife have proven valuable to our understanding of the potential effects of endocrine-disrupting chemicals (EDCs) on human health by contributing considerably to our understanding of the mechanisms and consequences of EDC exposure. But the threats EDCs present to populations of wildlife species themselves are significant, particularly for endangered species whose existence is vulnerable to any reproductive perturbation....