Fish Kills by Red Tide or Fuel?

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This Thursday morning, in the spring of Marina Vallarta, dead fish appeared, officially unknown if it was red tide or boat fuel

By Mauricio Lira Camacho
NOTICIASPV

Fish die on the dock of Marina Vallarta.

Officially unknown causes of this phenomenon, a group of fishermen in the area say it's normal, because of the red tide.

But another part says that it is the result that fuel boaters thrown into the sea.

The truth is that at an early hour, it was the death of fish ecology any municipal authority, or state representation and
federation, had been present at the scene.

Fact that drew the attention mainly of residents and tourists who were in that area, which has restaurants that open early.

This means of communication, received the first report of the occurrence of fish past eight in the morning of Thursday 25 October, which marks Puerto Vallarta, 10 years Hurricane Kenna.

The presence of dead fish at some point of the bay, is not new, it is a topic addressed and work by fishermen who have noted this phenomenon is due to the presence of red tide, and in other cases the phenomenon of the child.

Based on the water temperature changes in the sea.

Although it is possible that the fish kill, obey the contaminated water after the area of ​​Marina Vallarta, full of yachts and boats.

Residents of Marina Vallarta, owners have seen fuel boats when thrown into the sea, one of the arguments do not rule could also have been the cause of fish kills.

Red Tide

Note that the red tide phenomenon is recurrent in the seas of the world and Mexico is no exception.

Due to his status in the Pacific Ocean, Puerto Vallarta has had consequences as a cause of fish kills.

Red tide or "hemotalasia" (= blood Hematos thalasos = sea), is a phenomenon that causes a change in the color of the sea due to the proliferation of millions of tiny algae. Even in ancient times it exclusively related red algae, today the term is used for any massive proliferation of algae.

Among the various agencies responsible for red tides, the most common are the dinoflagellates. These tiny organisms are able to synthesize potent biotoxins. Dinoflagellates are part of the food of bivalve molluscs (mussel, scallop, mussel, clam, etc.) And gastropods (snails), agencies that concentrate toxins and yet not suffer any change in color, odor or taste so that , to "naked eye", you can not detect their toxicity.

His appearance is favored by different conditions, such as absence of wind, the pollution caused by man, the high temperature or the presence of certain organic substances in water that promotes the development of algae. His disappearance, usually sudden, might respond to various factors such as the depletion of nutrients or oxygen and predation.

The major groups of toxins found in these algae are the amnesic, paralytic toxins and toxins gastric.

The red tide poisoning is manifested at first by a tingling in the lips, tongue, mouth and face. May appear paralysis, difficulty breathing, nausea, dizziness and vomiting. These symptoms usually appear within 30 to 60 minutes after ingestion. If shellfish concentrate a large amount of toxin poisoning can be fatal, and develop in a very short time. There have been reports of death after fifteen minutes of intake.

The toxin type depends on the species of dinoflagellates and against it, at present, there is no known antidote.
This toxin is 100 times more potent than strychnine and is the most potent natural toxic than known so far. Diminishes their power in alkaline solutions and loses toxicity to various oxidants. Alcohol consumption increases absorption, not inactivated by cooking and activity increases with added acidic (lemon juice and vinegar).

The preferred basic treatment is to induce vomiting by administering warm salt water or by any other method. Rescue breathing is essential in acute cases. Never administrársele patient alcohol or coffee and should carry him to the doctor immediately.

It is important to note that intoxication only occurs from eating shellfish and not touch or make any kind of tampering with them, even when they contain high levels of toxin. Nor is dangerous accidentally drinking seawater.
This phenomenon does not affect fish, octopus, squid and prawns. But it does affect shellfish and sea snails, so do not eat these shellfish until they have passed at least 30 days after the disappearance of the red tide o

[readon1 url="http://www.noticiaspv.com/archivo/229408"]Source:www.noticiaspv.com – Oct 25, 2012 Translation by Suyapa Ajuria[/readon1]