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California sea lions killed to protect migrating fish

AFP  |  Los Angeles 

Authorities in the state of have euthanised four sea lions in the last month as part of a program to protect runs and steelhead that are at risk of going extinct.

A for the state's Department of and told AFP the lethal removals of the sea lions began in mid-December and would continue through May.

said the killings were necessary to save migrating steelhead that have been ravaged by the sea lions in recent years as they swim upstream from the ocean to spawn.

"Our scientists believe that if these sea lions aren't removed, that run of steelhead could go extinct anytime," Swart said.

He said were also threatened by the sea mammals, whose population has exploded since the Marine Mammal Protection Act was passed in 1972.

"What's going on here is we have a run of wild native steelhead and they are moving right now from the ocean upstream to spawn," said.

"And when they get to in Oregon, in downtown Portland, they come up against the waterfall and a dam and it takes them a while to get across that." He said that as the gather in a big school while preparing to go over the waterfall and dam, the sea lions swim in and feast on the

"Two years ago, the sea lions destroyed 25 percent of that wild steelhead run," Swart added.

"They killed about 512 and that represented about one fourth of all the fish that we had left." He said the state was authorized to kill up to 93 sea lions a year but he expected that no more than 40 would be removed this year.

Authorities in the past have used various non-lethal techniques, including loud noise or rubber buckshot, but the animals have adapted and learned how to avoid the threat.

(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)

First Published: Sat, January 12 2019. 08:45 IST