Logan is an ecophysiologist with a primary interest in understanding how marine megafauna populations alter their physiology and demography as a response to changes in their environment. To address these questions, Logan collects minimally invasive tissue samples (e.g., blood/skin) and then uses molecular and endocrinological markers to answer specific questions about population health and reproduction/stress physiology. He works on multiple species of large marine megafauna worldwide and continuously advocates for ethical animal research and effective conservation and policy. Much of Logan’s work to date has been focused along the Antarctic Peninsula, the South/Central Pacific, and the coast of California.