Pregnant humpback whales' energy needs increase when fasting during migration

Proper intake of food is essential for pregnant humpback whales to pull off the extreme physical feat of annual migration between Hawaiʻi and Alaska. Researchers at the Marine Mammal Research Program (MMRP) at University of Hawaiʻi at Mānoa Hawaiʻi Institute of Marine Biology (HIMB) revealed the energetic cost and vulnerabilities of migratory humpback mothers-to-be in a study published in The Journal of Physiology.