Modern Coyotes Eat More Marine Mammals Than Before

August 20, 2018

New research from UCSC researchers shows that coyotes expanded their diets to include more marine mammals than their historical ancestors. Researchers compared the isotopic signature of coyotes, grizzly bears, and their prey from modern and ancient (up to 3000 years old!) samples. Isoptic changes over time suggest that modern coyotes derive more nutrition from marine resources, including elephant seals and sea lions at Ano Nuevo Island Reserve, than coyotes did in the past. The researchers suggest that the coyotes altered their behavior due to a lack of competition from grizzly bears, and recent marine mammal protections along the coast. The work uses samples from Ano Nuevo Island Reserve, and Younger Lagoon Reserve.

 

You can read the full article here, published in The Holocene.