Fish Pingers

Does tagging fish make them easy prey? Researchers routinely tag fish with acoustic pingers, which allow the tracking their movements to determine population movements and patterns. Marine mammals may be able to use those tags to locate and eat the fish.  Researchers...

Manatee Diets

Determining manatee diets HSWRI researchers performed the first isotope analysis of Florida manatees as a baseline to determine wild manatee diets. Manatees feed on a variety of plants in fresh, estuarine and marine habitats, but it’s difficult to determine...

Elephant Seals

The double migration of elephant seals HSWRI researchers discovered that adult northern elephant seals, who both breed and molt on California’s Channel Islands, go to sea twice each year during which they range widely in the northern Pacific Ocean. Using new...

California Sea Lions

Effects of El Niño on California sea lions Prior to the 1983 El Niño, California sea lion populations in the Channel Islands were recovering from the low numbers that resulted from indiscriminate killing which had continued through the 1930s. HSWRI researchers...

Beluga Whales

Beluga whale response to oil drilling Belugas depend upon sound for many important biological functions such as foraging, navigation and communication. The territory of beluga whales overlaps the rich oil deposits in the arctic continental shelf. Oil exploration,...