Oregon Marine Mammal Stranding Network

As in past years, we are currently seeing a significant increase in the frequency of California sea lions (Zalophus californianus) appearing on Oregon beaches in varying states of health and disease. Many have been affected by Leptospirosis, a contagious bacterial infection of the kidneys. This disease causes animals to appear very lethargic and unable or unwilling to move their hind limbs, and is often accompanied by weight loss and pneumonia. While it is possible for infected animals to recover from this disease if given plenty of opportunity to rest, there is no option to rescue and rehabilitate these animals in...

A new webcam has been installed at Newport’s popular sea lion haul out, Port Dock 1. This camera is monitored by the Oregon Marine Mammal Stranding Network to check for injuries due to entanglements in fishery gear and marine debris. Sea lions periodically come ashore with plastic packing bands wrapped around their necks and fishing lures hanging from their mouths. A capture cage is sometimes deployed at this site to treat entangled sea lions.

NEWPORT (The Oregonian) – Motel manager Frank Brooks called the Oregon Marine Mammal Stranding Network. Then someone saw the turtle lift its head, someone else thought they saw it move a flipper, and so the race was on to save the 135-pound green sea turtle.

On Thursday May 20, a team from the Marine Mammal Institute was able to successfully remove a plastic packing band that had been wrapped around the neck of an adult male California sea lion. This was our first attempt at removing debris from a sea lion on a beach.

We've also recently been successful with desentanglement efforts on a Steller sea lion at Sea Lion Caves and at our recently deployed disentanglement capture cage at the Bayfront in Newport.

Unfortunately, packing band entanglements are increasingly common with sea lions along the West Coast. These plastic strips are used in the packaging of many products, particularly frozen fish used for bait, and end up in...

A crew from the Pinniped Ecology Applied Research Laboratory (PEARL) with OSU's Marine Mammal Institute is helping the North Coast Marine Mammal Center (http://www.northcoastmmc.org/index.php) track a young female Steller sea lion who was released from the rehabilitation facility in Crescent City, CA on Saturday, March 27. Markus Horning and interns Julia Hager, Stephen Meck and Jennifer Olson glued a satellite transmitter to the fur on the animals' head using 5-minute epoxy. The transmitter allows researchers to track the sea lion's location on a daily basis. The device is expected to fall off by the annual molt in August.

This is the first time a...

A custom-built capture cage has been deployed at Newport's Port Dock 1 to address this problem of sea lion entanglement. The cage is basically a modified floating dock enclosed on four sides by a galvanized steel structure, with sliding doors on two sides. It is designed primarily to serve as an additional haul out area for sea lions to use freely, with its doors locked in the open position so animals can comfortably come and go as they choose.