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Natural toxin in algae (domoic acid -- neurotoxin) kills sea lions
UCLA Daily Bruin ^ | May 31, 2005 | DB News

Posted on 05/31/2005 8:48:15 PM PDT by FairOpinion

SANTA MONICA — Three dead sea lions washed ashore on several beaches Monday after getting sick from a natural toxin released by algae.

That brings the total number of sea lions washing ashore in recent days to eight, though the previous five were still alive.

Those animals, some of whom were pregnant, were being nursed back to health by the nonprofit group Whale Rescue Team after they were found ashore in Playa Del Rey, Venice, Santa Monica and Will Rogers State beaches in recent weeks.

The dead sea lions washed up at Cabrillo and White Point beaches in San Pedro.

Peter Wallerstein, a spokesman for the rescue group, said it appeared the sea lions were victims of domoic acid, a natural toxin produced by an algae that has sickened dozens of sea mammals off the Southern California coast in recent years. It attacks the nervous system and causes seizures.

"In 20 years, this is the hardest thing I've seen," Wallerstein said, "the look in the eyes of these sea lions while those neurotoxins are exploding in their brains." The rescue group has picked up 118 beached sea mammals so far this year, he said, and many of the young sea lions did not survive the domoic acid poisoning.


TOPICS: Extended News; US: California
KEYWORDS: algae; beach; california; environment; sealions; toxin
Sounds like some nasty stuff.
1 posted on 05/31/2005 8:48:15 PM PDT by FairOpinion
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To: FairOpinion
SANTA MONICA — Three dead sea lions washed ashore on several beaches Monday after getting sick from a natural toxin released by algae.

What they don't tell you is that the algae grow on the feces of over-populated pinnipeds (seals and sea lions), whose nitrate biomass added to the Bay probably exceeds that of the entire population of the LA basin. The pinnipeds are getting that way due to feasting on "threatened" steelhead and a lack of predators (notably grizzly bears and great white sharks).

I can just see the residents of Santa Monica lining up to have grizzlies roam the beaches to control the sea lions. It s for The Environment you know.

2 posted on 05/31/2005 9:10:07 PM PDT by Carry_Okie (There are people in power who are REALLY stupid.)
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To: FairOpinion
President Bush, this is all your fault and I wanna know what yer gonna do about it?
3 posted on 05/31/2005 9:11:02 PM PDT by upchuck (If our nation be destroyed, it would be from the judiciary." ~ Thomas Jefferson)
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To: FairOpinion

4 posted on 05/31/2005 11:06:06 PM PDT by AdmSmith
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To: All


Domoic acid, also called Amnesic Shellfish Poison (ASP), is an acidic cyanotoxin found associated with certain algal blooms. Domoic acid was discovered from the seaweed called "Doumoi"(Chondria armata) by the Meiji Era in Japan. The chemical can bioaccumulate in marine organisms that feed on the phytoplankton, such as shellfish, anchovies, and sardines.

In mammals, including humans, domoic acid acts as a neurotoxin, causing short term memory loss, brain damage, and death in severe cases. Red tides are associated with the phenomenon of ASP.

In the brain, domoic acid especially damages the hippocampus and amygdaloid nucleus. It damages the neurons by activating AMPA and kainate receptors, causing an influx of calcium. Although calcium flowing into cells is a normal event, the uncontrolled increase of calcium causes the cell to degenerate.

http://encyclopedia.laborlawtalk.com/domoic_acid
5 posted on 05/31/2005 11:13:54 PM PDT by AdmSmith
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To: AdmSmith
This post is typical eco-hooey. To blame higher nitrate levels on ag runoff when there are vastly fewer farms in that region than fifty years ago, is beyond dishonest.

Blaming farms for nitrate in this instance is yet another excuse to put them out of business and take their land.

6 posted on 06/01/2005 6:34:38 AM PDT by Carry_Okie (The environment is too complex and too important to be managed by central planning.)
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To: Carry_Okie
I guess that it is the ratio of Nitrogen to Phosphorus that is key to the production of the domoic acid. The Nitrogen fixation is a natural process in the upper layer of the sea, the part due to man is local.

I would not blame the farmers for that.
7 posted on 06/01/2005 7:15:12 AM PDT by AdmSmith
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To: AdmSmith
I would not blame the farmers for that.

They get blamed when there's money to be made in real estate, restoration projects, etc. What was once a well meaning effort to protect threatened habitat, has now become a racket that's all about getting cheap dirt for development, making money in foreign ag investments, and jobs for bureaucrats and academics.

We've had similar problems here in Santa Cruz. There's a book chapter online containing an amusing section on the topic pinnipeds.

8 posted on 06/01/2005 7:29:13 AM PDT by Carry_Okie (The environment is too complex and too important to be managed by central planning.)
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To: Carry_Okie

You have written a nice book. Yes, the tragedy of the commons must be solved by property rights. Tell that to Japan, Spain, Norway etc. that are vacuum cleaning the seas.


9 posted on 06/01/2005 7:37:40 AM PDT by AdmSmith
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To: AdmSmith
You have written a nice book.

Thanks, it was a lot of work.

Yes, the tragedy of the commons must be solved by property rights. Tell that to Japan, Spain, Norway etc. that are vacuum cleaning the seas.

About which we don't do anything because we owe them money. Meanwhile, we write regulations that actually cut coastal productivity! Yep, it's a big problem. My opinion is that humans now have the means to settle the ocean with maritime nations and GPS determined property lines. It would be a good thing. Keep the UN out of it.

10 posted on 06/01/2005 7:45:03 AM PDT by Carry_Okie (The environment is too complex and too important to be managed by central planning.)
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To: farmfriend


11 posted on 06/01/2005 8:11:15 AM PDT by Libertarianize the GOP (Make all taxes truly voluntary)
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