Category: Animals Deaths


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NBC NEWS
News
Dec 14 2015, 4:51 pm ET

Algae Causing Sea Lion Brain Damage in California, Study Shows

Image: ENVIRONMENT-US-RESEARCH-BIOLOGY-NATURE-ANIMAL-FILES

In this September 11, 2013 file photo, a sea lion scratches himself on Pier 39 at Fisherman’s Wharf in San Francisco, California. DON EMMERT / AFP – Getty Images

WASHINGTON — A toxin produced by marine algae is inflicting brain damage on sea lions along California’s coast, causing neurological and behavioral changes that can impair their ability to navigate in the sea and survive in the wild, scientists said on Monday.

Brain scans on 30 California sea lions detected damage in the hippocampus, a brain structure associated with memory and spatial navigation, in animals naturally exposed to the toxin known as domoic acid, the researchers said.

Domoic acid mimics glutamate, a chemical that transmits nerve impulses in the brain, and leads to over-activation of hippocampus nerve cells and chronic epilepsy, according to Emory University cognitive psychologist Peter Cook, who worked on the study while at the University of California-Santa Cruz.

“The behavioral deficits accompanying brain damage with domoic acid are severe, and may negatively impact foraging and navigation in sea lions, driving strandings and mortality,” Cook said.

Hundreds of sea lions annually are found stranded on California beaches with signs of domoic acid poisoning such as disorientation and seizures. Thousands are thought to be exposed to the toxin.

 

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Shanghaiist

3.9-ton whale found dead on Shandong beach, workers load it up, drive to freezing plant for further examination

[Images via China News & NetEase]whale_truck2.jpg

[Images via China News & NetEase]

 

Over the weekend, a mammoth 8.5-meter long, 3.9-ton whale was found dead, washed ashore near Rizhao city in Shandong province.

The locals informed the city bureau of ocean and fishery, who arrived quickly to see one truly massive whale carcass that would have to be moved.

According to NetEase, the staff’s initial evaluation was that the whale had been killed by getting tangled up in a fishing net and strangling to death. They needed to get it back to the freezing plant for further examination, so with quite a bit of effort they used a crane to lift the carcass up on a truck and away they went.

 

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