Back to the Sea for Wayward Sea Lions

Rescued animal returned to the wild

Sunday, Jul 19, 2009  |  Updated 10:18 AM PDT
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Sea Lions Come up Sick In Sausalito

Los Angeles Times

Getting sick sea lions back to the ocean is the goal of the Marine Mammal Center.

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Sea Lions Released

NBC Bay Area Photojournalist Erin Murphy follows 6 sea lions on their way back to the wild.
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A wayward California sea lion named Fruitvale and five of his companions were released back into the ocean this weekend just off of the Farallon Islands.

The release comes just one day after a wayward lion was found and rescued from the streets of Sausalito.  The Marine Mammal Center has named him "Scotty J" and is still be evaluated by experts.

Another sea lion named Fruitvale is the one who got his freedom back Saturday.  Fruitvale is a 1-year-old sea lion.  He made headlines earlier this summer when Oakland police found him waddling down Interstate Highway 880.  The Marine Mammal Center, a nonprofit veterinary hospital in Sausalito, has been treating him for malnourishment ever since.

He is one of hundreds of California sea lions the center is rehabilitating due to a major shortage of the schooling fish, such as  anchovies and herring, which comprise the animals' diets. These animals are coming ashore around the region in alarmingly high numbers, exhausted and looking for food.

For the past six weeks, Marine Mammal Center workers have been releasing some of these rehabilitated yearlings back into the ocean. The 45  sightseers who bought tickets for Saturday's SF Bay Whale Watching Cruise to the Farallon Islands were surprised to discover six sea lions in plastic carriers would be coming along as well.

The ship's captain, Joe Nazar, lets the center use his cruises to return sea lions to the Farallones where food is more abundant and human  contact is minimal.

Fruitvale and company endured choppy waters to arrive at the Farallones around 11:30 a.m. Here Nazar and Trish Mirabella, an educator at  the center, gave visitors and unanticipated lesson in marine science. Nazar must participate because by law the ship's captain is the only one who can  open the gates on the side of the boat.

One by one, he and Mirabella positioned each plastic carrier at the open gate and released the door, allowing Fruitvale, Anquet, Hondo,  Metheny, Prelude, and Superstar to dive head first into the ocean and swim away.

Heidi Andrews and her family came into San Francisco from  Livermore for the seven-hour whale watching cruise. The surprise sea lion  dispatch "was the best part of the day," she said.

"We watched them all come out," she said. "They all stuck together as they swam off."

The sea lions were rescued between June 22 and July 5, from points including Fort Baker to as far south as Pismo State Beach near San Luis Obispo, according to the center. In the past six weeks, seven boats have  ferried sea lions to the Farallones.

Fruitvale was one of the luckier sea lions, said Marjorie Boor, a volunteer with the Center. He was underfed, but was not suffering from the abscesses or fishing line injuries that plague other sea lions searching for  food.

"He pretty much got to hang out and fatten up," she said. Year-old sea lions usually weigh about 50 kilograms, or 110 pounds. The sea lions released today weigh 15 to 20 kilograms, she said.

Workers at the center have been feeding sea lions through tubes,  Boor said, a difficult proposition since the animals have teeth.

This desperation for food also causes other health problems.  Metheny the sea lion still has scarring around her neck from an encounter  with fishing line. She was so hungry she most likely went after a fisherman's bait, Boor said.

The lack of fish, coupled with a larger-than-average sea lion  birth rate last year, means one-year-old sea lions are having trouble finding  food when they leave their mothers to make room for the new crop of babies.  Yearling sea lions are coming ashore all over the Bay Area emaciated,  malnourished and sometimes injured.

"They're just walking out of the surf and collapsing," Boor said.  "There's a crisis going on."

The Center typically sees about 700 animals a year, mostly sea  lions, elephant seals and harbor seals. So far more than 1,000 animals have  come to the Center this year, and more than 700 are sea lions. Staff and  volunteers are struggling to keep up, and many animals are too far gone to be  saved, Boor said.

Warmer ocean temperatures are wreaking havoc on the food supply in  several ways, according to Bob DeLong, a marine biologist with National  Marine Mammal Laboratory in Seattle. The strong winds that typically "upwell" colder deep-ocean waters to the ocean surface ceased in late May, he said.  This creates a scarcity of phytoplankton, he said, which causes problems  higher up on the food chain

Without this colder, nutrient-rich water, there is less phytoplankton at the ocean's surface and in turn, less fish for sea lions to  eat, according to DeLong. The warmer water also drives existing fish away as they seek colder temperatures farther out at sea.

Additionally, the West Coast has just entered into El Nino conditions, expected to raise water temperatures even further in three or  four months.

"It could get a whole lot worse, but we don't know how strong it's going to be," he said.

 

Bay City News contributed to this report.

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