Though small in number, the fish thrived in the Mississippi, gorging on plankton and reproducing each spring.
Researchers at Plymouth University's Marine Institute want seafarers to help measure the quantity of plankton.
BBC: Seafarer science: Sailors asked to help measure plankton
Then, in July 1992, a deadly red tide of poisonous plankton struck the bay.
Plankton found in the estuaries nourish organisms all the way up the food chain.
Fewer plankton make it harder for the fish, and therefore the birds, to survive.
But unlike most salmon, which eat other fish, sockeye eat plankton, tiny shrimplike animals.
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Plankton are microscopic organisms, key to the marine food chain, but research suggests they are in decline.
BBC: Seafarer science: Sailors asked to help measure plankton
As "citizen scientists, " they will collect twice-daily plankton samples for researchers at the University of Alaska, Fairbanks.
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Scientists believe warmer waters have depleted plankton stocks, which form the basis of food for many such fish.
This allowed the populations of plankton-eating fish to stage a recovery and compete with the jellyfish for the zooplankton.
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The asteroid or comet impact widely implicated in the dinosaurs' demise would also have damaged plankton production in the oceans.
An average-sized humpback whale eats 2, 000-2, 500 kg of plankton, krill and small, schooling fish but don't worry, no kayakers per day.
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And if Fan Duel becomes plankton, Comcast might need to invest substantially more into the company to garner a sizable return.
From July to September (July is the best month) a couple of thousand of these big boys come to feed off the plankton-rich seas.
They are tiny animals and polyps that exist as genetically identical individuals, and can eat, defend themselves and kill plankton for food.
Added to their annual disappearing act, they feed exclusively on plankton, which means they can't readily be captured with traditional rod-and-reel methods.
CNN: Scientists discover winter home of world's second-biggest fish
Scientists are enlisting sailors and fishermen to help with what they hope will be the world's biggest study of plankton in the oceans.
BBC: Seafarer science: Sailors asked to help measure plankton
If plankton provided the major part of the ammonite diet then this could help explain their extinction 65 million years ago, the team believes.
Of particular concern are silver and bighead carp, which gorge on plankton microscopic plants and animals that virtually all fish eat at some point.
The stated intention was to trigger a plankton bloom in the hope of attracting salmon to this food source and enhance fisheries in the area.
Crabs, mussels, oysters and shrimp feed on the plankton, he said.
Worms, plankton, crayfish, lily roots, disappeared down her toothed, capacious throat.
Marine scientists in Plymouth have been monitoring plankton for 70 years.
It can adversely affect forests and crops, and is also linked with damage to plankton, the microscopic creatures at the bottom of the marine food chain.
Attracted by plankton, krill and large shoals of herring, minke, fin, humpback, and the occasional killer whale habitually pass through the briny coastal waters between Donegal and Cork City.
The Humboldt current supports one of the world's great fisheries: despite years of over-exploitation, its plankton-rich waters teem with shoals of Pacific pilchard (anchoveta) and horse mackerel.
Rising water temperatures have led to sudden and dramatic changes - with the plankton breeding at the wrong time, and in the wrong place, threatening species like cod.
The ocean absorbs close to 26% of carbon dioxide emissions in the atmosphere, increasing acidification which in turn is affecting plankton and, through them, the entire food chain.
Even when the sharks are found closer to the ocean surface, they spend their time in the cool-temperature, plankton-rich waters that limit underwater visibility and make diving difficult.
CNN: Scientists discover winter home of world's second-biggest fish
Charles described an area in the Pacific, twice the size of Texas, transformed literally into a plastic soup, where one part plankton to six parts plastic could be trawled.
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