Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
- Publication
Articles 1 - 2 of 2
Full-Text Articles in Other Animal Sciences
Botswana’S Elephant-Back Safari Industry – Stress-Response In Working African Elephants And Analysis Of Their Post-Release Movements, Tanya Lama
Masters Theses
Understanding how African elephants (Loxodonta africana) respond to human interactions in ecotourism operations is critical to safeguarding animal and human welfare and sustaining wildlife ecotourism activities. We investigated the stress response of elephants to a variety of tourist activities over a 15-month period at Abu Camp in northern Botswana. We compared fecal glucocorticoid metabolite (FGM) concentrations across three elephant groups, including: eight elephants in an elephant-tourism operation (Abu herd), three elephants previously reintroduced back into the wild from the Abu herd, and wild elephants. There were no differences in FGM concentrations between the three groups of elephants. The highest observed …
Calcium And Metabolism In Sperm: Fundamental Players For Fertilization And Embryo Development, Felipe Navarrete
Calcium And Metabolism In Sperm: Fundamental Players For Fertilization And Embryo Development, Felipe Navarrete
Doctoral Dissertations
Mammalian sperm acquire the fertilizing ability in the female tract in a process known as capacitation. At the molecular level, capacitation is associated with the up-regulation of a cAMP-dependent pathway, changes in intracellular pH, intracellular Ca2+, ATP consumption and an increase in tyrosine phosphorylation. However, little is known about the function of Ca2+ and ATP during this important process. These signaling systems interact during capacitation are still not well understood. Results presented in this study indicate that Ca2+ ions have a biphasic role in the regulation of cAMP-dependent signaling. Sperm incubated in zero Ca2+ in …