I do not have all the details at this time, but here is a brief summary of the case: State wildlife managers went to the federal government, through NOAA, seeking permission to kill sea lions on the Columbia because they said that the sea lions were eating salmon. Rather than address the real issues behind the salmon crash all down the coast, they are trying to buy a little time for the fishing and power industries by scapegoating sea lions. NOAA granted that permission. The Humane Society of the United States, the Wild Fish Conservancy, and two individuals sued the government to stop the killing. Mosman originally ruled that sea lions could be killed while the case was going through the courts, since it would not cause irreparable harm to kill them. The 9th circuit court of appeals rejected Mosman's bizarre reasoning, stating that by definition, killing another living being is, in fact, "irreparable harm."
Oral arguments were heard during the late summer. At that time, Mosman said that he was leaning toward allowing the sea lions to be killed, but that he would think about it and issue his formal ruling in a week or so. Today, at a time when he likely feels that he can escape scrutiny over this decision due to the holiday weekend, he has just ruled that the killing can commence when the sea lions return to the river in the spring. It's a appalling blow to those of us who can't understand how so many people can be blind to the sentience of other living beings on this planet. But it's not irrevocable. The plaintiffs in this case have vowed to appeal such a decision, and I am confident that they will.
I will share more details as they are made available.