For more than 30 years, the Monterey Bay Aquarium has been a key contributor to sea otter recovery in California. Aquarium researchers and policy experts have advanced scientific knowledge, promoted improved management and raised public awareness of the contributions sea otters make to healthy coastal ecosystems. A new research paper in the journal Ecography draws on three decades of Aquarium research to establish a link between sparse kelp cover along the California coast and a recent rise in sea otter mortalities from white shark bites. The finding illuminates a new challenge for everyone working toward sea otter recovery: Will sea otters be able to run the gauntlet of white sharks and expand back into their historical range without human assistance? Conservation Research staffer Athena Copenhaver explores the challenge.
Senior research biologist Teri Nicholson fans out her left hand, tapping each finger as she recites a brief list of unusual names: Jiggs, Goldie, Hailey, Milkdud . . .
They might sound as though they belong to beloved pets, but Teri is actually recalling the stranded southern sea otter pups taken in by Monterey Bay Aquarium back in 1984.
Although Teri and her colleagues didn’t know it at the time, these first four orphaned pups became foundational data points in a pioneering sea otter study that spans the lifetime of the Aquarium.
The study, recently published in Ecography, uses information collected from 725 live-stranded sea otters between 1984 and 2015 to illuminate the critical relationship between a healthy kelp canopy, sea otter population recovery, and sea otter deaths from white shark bites.
“By rescuing and rehabilitating stranded animals, we can observe symptoms and determine possible reasons the animal might have stranded,” explains Teri. “And, that means we can look for patterns in threats otters face over time.” Continue reading Sea otters’ perilous path to recovery