Sardines may help to slow aging of your brain

Eating sardines may slow the brain’s aging and protect against Alzheimer’s disease.

Eating oily fish such as mackerel and sardines may ward off Alzheimer’s disease and can delay elderly people’s brains’ aging by two years, a study suggests.

Research of more than 1,100 elderly women found that those who consumed high levels of omega-3 fatty acids, which are found in oily fish, had larger brains.

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Squid vs. fish: Camera captures epic undersea battle on video

Thanks to its sharp beak, a small red squid emerged victorious after an epic hourlong battle with a much bigger owlfish, all caught on video last November in Monterey Bay, Calif.

The black-eyed squid paralyzed the owlfish by cutting through the fish’s backbone, according to Bruce Robinson, a senior scientist at the Monterey Bay Aquarium Research Institute. Robinson narrates a video of the fight between invertebrate and vertebrate, captured by MBARI’s remotely operate vehicled Doc Ricketts on Nov. 11, 2013.

The Doc Ricketts discovered the struggling marine creatures at about 1,475 feet (450 meters) below Monterey Bay as the vehicle was rising toward the surface, said Susan von Thun, an MBARI senior research technician. Scientists watched the scene play out for 50 minutes before the ROV had to continue its journey, Von Thun told LiveScience. [See video of the squid-fish tussle.]

“They were sinking rapidly the whole time, and we think that’s part of the squid’s tactic,” Von Thun said. “We see a lot of feeding events, and oftentimes the squid gets startled and lets go, but this guy held on for the whole time that we watched it.”

By the time the ROV left, the squid and owlfish had dropped to a depth of 1,970 feet (600 meters), Von Thun said.

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From ancient fish, insight into origin of limbs

A fish with legs? It sounds preposterous, but ancient fossils unearthed in the Canadian Arctic reveal a fish that had skeletal features similar to animals with legs, researchers said Monday.

The find challenges the widely held view of evolution that hind limbs did not begin to form until creatures left the oceans and began living on land.

And it provides a powerful insight into the pivotal episode when creatures emerged onto land: If the authors are right, we can trace our arms — and our legs — to fish fins.

“That wrist you use to write with, the neck you use to move your head around with, the lungs you’re using to breathe . . . all derive from parts in the bodies of fish. Your hands and arms derive from parts of the fins,” said Neil Shubin, a professor of anatomy at the University of Chicago who was one of the leaders of the work. “What the fossil record tells us is how deeply we are connected to life on the rest of the planet. In this case, this tells us how closely we are related to fish.”

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As sardines vanish from Southern California coastal waters, fishermen rely on squid and anchovy

Larry Derr was as prepared as any longtime Southern California bait fisherman for the disappearance of the Pacific sardines he has pulled up by the ton since the 1980s.

He can fish anchovies instead and, if those become scarce, there’s been a local surge in market squid to keep him in business.

But the fickle sardines have been so abundant for so many years – sometimes holding court as the most plentiful fish in coastal waters – that it was a shock when he couldn’t find one of the shiny silver- blue coastal fish all summer, even though this isn’t the first time they’ve vanished.

And the similar, but smaller, anchovies have proven a poor replacement since sardines became scarce. Fortunately, a boom in market squid has propelled Derr and other coastal pelagic fishers.

In three days of nighttime fishing last week, Derr barely cleared a measly 20 scoops of anchovies to sell.

“A couple days ago we caught a ton of anchovies,” Derr said, keeping a vigilant eye for the telltale red mass on the In-Seine’s sonar during a predawn hunt Saturday. The screen remained black with irregularly dispersed green dots representing schools too small to fish. “We want this to be solid red.”

Though sardines aren’t as valuable as tuna or rockfish, they’re an important food source for larger fish, marine mammals like sea lions, dolphins and whales, and sea birds that can spot them from the air and dive for them.

Some have attributed recent rashes of sea lion pup and pelican deaths to the sardine population decline, which began a few years ago and was officially recognized in December when the fishing quota was dropped to just 5,446 metric tons for all of California, Oregon and Washington from January to June. In the same time period last year, the quota was 18,073 metric tons.

The Pacific Fishery Management Council lowered the quota in November after years of sardine stock decline from 2006, when 1.4 million tons were estimated to be swimming around the north Pacific. This year, their numbers are believed to be less than 400,000 metric tons.

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Giant squid caught by net fisherman off Japan

A story published Thursday about a monstrous radioactive squid discovered on a Southern California beach was an obvious hoax.

But this past week off Japan, an actual giant squid was captured in a fisherman’s net and died after it was hauled to the surface.

The squid in the hoax story was said to be 160 feet long and its immense size was blamed on radiation being leaked into the Pacific in the aftermath of the 2011 Fukushima nuclear disaster.

“Alarms sound over radioactive gigantism,” screamed a headline above a story that featured a photoshopped image and quoted experts who do not exist.

Though some believed the story, fabricated by the Lightly Braised Turnip website, it was easily debunked.

But the capture of an actual giant squid Wednesday off Sadogashima Island is more believable, even though squid captures are exceedingly rare.

According to the Japan Times, the male specimen measured about 12 feet and weighed about 330 pounds. The accompanying Japanese-language video shows the creature on display and being measured by scientists (footage of the squid being pulled to the boat begins at the 1-minute mark).

Giant squid are elusive creatures that occupy the dark ocean depths. They’re believed to have spawned sea monster myths among ancient mariners, and have been featured as predatory beasts in novels and films.

They can measure to about 40 feet and weigh nearly a ton.

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They’re back – the bay’s herring hordes return

Sea lions, porpoises and tens of thousands of birds are jockeying for position with fishermen this week as the annual herring run splashes into San Francisco Bay, a spectacular marine wildlife showcase that conservationists say is one of the largest in North America.

The schools of herring, which surge into the bay in several waves, have attracted as many as 70,000 birds to the region, particularly to Richardson Bay in Marin County, a spawning hot spot for the squiggling hordes.

The fish arrived en masse beginning last week to lay and fertilize eggs, or roe – a delicacy for a wide variety of species, including sushi-loving humans. Fishermen are rushing out every morning to cast their nets before the menagerie of honking, squawking ducks, pelicans and diving birds can devour all the good stuff.

“We’re the last predators to get a crack at those fish. Everyone else has come to the table, and we get the leftovers,” said Nick Sohrakoff, a herring fisherman and chairman of the local herring advisory committee. “There’s a lot of fish in the bay, and they seem this year to be a little bit bigger than they were in the past few years.”

The riotous reception is a good sign that the bay’s once-thriving herring runs, which collapsed four years ago, are returning to glory. The San Francisco run – the last urban fishery in the United States – is the only big-time fishing operation where spectators can actually sit on shore and watch commercial boats haul in the catch.

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9 Reasons To Eat Fish Right Now

All things considered, 2013 was not the best year for fish news. We learned all about the dangers of contaminated fish sources and, just in December, a large-scale study published in The Journal of Nutrition found some evidence to contradict the commonly held belief that a fish-rich diet improved cognitive function in old age.

But, looking forward, the news gets better: In its first issue of 2014, the Journal of the Academy of Nutrition and Dietetics released a new position on fat intake, promoting fatty fish as the go-to source for polyunsaturated fatty acids:

   It is the position of the Academy of Nutrition and Dietetics that dietary fat for the healthy adult population should provide 20 percent to 35 percent of energy, with an increased consumption of n-3 polyunsaturated fatty acids and limited intake of saturated and trans fats.

Two “long-chain” omega-3 fatty acids found in fish, EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), are not made by the human body, meaning we need to eat them from a dietary source. Many people get omega-3 fatty acids from plant sources like flax seeds and walnuts, though this type of “good” fat — alpha-linolenic acid — only partially converts to EPA and DHA in the body and doesn’t have the same amount of research behind it that omega-3s derived from fish do. Here are nine reasons to eat fish for your health:

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