Humpback Whales in Glacier Bay National Monument, Alaska

Glacier Bay National Monument is a dramatic Alaskan inlet where towering glaciers meet rich, nutrient‑laden waters that lure humpback whales each summer. Scientists have long used the bay as a natural laboratory to track the whales’ movements, feeding habits, and seasonal patterns. This report brings together decades of observations to show why the area remains a vital summering ground for the species.

In the late 1970s, researchers noted a surprising dip in whale numbers, coinciding with a burst of commercial and tourist vessels. The document details field studies, sight‑ing logs, and firsthand accounts of whale‑boat encounters that suggested traffic may be nudging the giants out of the bay earlier than usual. It also records an interagency meeting where managers debated guidelines, speed limits, and even temporary closures to protect the animals.

Listeners will find a clear, data‑rich overview of the challenges of balancing wildlife conservation with human use, along with the early recommendations that shaped later management policies for Glacier Bay’s marine ecosystem.