Tuesday, August 23, 2016

China's empty oceans

Fishing boats sail from Shenjiamen port in Zhejiang province to fish in the East China Sea.
Photo: Xinhua

From Bloomberg by Adam Minter

On Wednesday, Indonesia celebrated its Independence Day with a bang -- blowing up several Chinese boats that had been caught fishing illegally in its waters and impounded.
China doesn't dispute Indonesia's territorial claims, but Chinese fishermen have more pressing concerns.
According to reports in Chinese state media this week, overfishing and pollution have so depleted China's own fishery resources that in some places -- including the East China Sea -- there are virtually "no fish" left.

That's a frightening prospect for an increasingly hungry country: China accounted for 35 percent of the world's seafood consumption in 2015.
Seeking catches further afield -- including in Indonesian waters -- isn't really a solution; fish stocks in the disputed South China Sea have themselves fallen by as much as 95 percent from 1950s levels.
If China doesn't want the rest of Asia's fisheries to suffer the same fate as its own, it's going to have to think much more ambitiously about how to create a sustainable food supply for the region.

As in other developing countries, China's ascent up the income ladder has been accompanied by an improvement in quality and quantity of diet.
Seafood -- once a pricey luxury in much of the country -- has become commonplace, even inland; China is now the world's biggest seafood consumer and exporter.
The economic impact has been extraordinary.
Between 1979 and 2013, China's fleet of motorized fishing vessels grew from 55,225 to 694,905 boats, while the number of people employed in the fishing industry exploded from 2.25 million to more than 14 million.
Meanwhile, the average fisherman's income increased from around $15 per month to nearly $2,000 per month.
Today, the fishing industry generates more than $260 billion annually, accounting for around 3 percent of Chinese GDP.

But in pursuing growth (and catch) at all costs, China's fishermen have exacted a terrible environmental toll.
Today, the Yangtze River, which supplies 60 percent of China's freshwater catch, produces less than a quarter of the fish it did in 1954, and most of the 170 species in the river are on the verge of extinction.
The situation is no better offshore.
The government acknowledges that Chinese fishermen routinely exceed annual sustainable catch limits in Chinese territorial seas by 30 percent or more.
A visit to any Chinese seafood market will turn up large inventories of under-sized fish that should never have been hauled in in the first place.

Blame for this state of affairs falls on both the fishing industry and the government, which spent $6.5 billion on fisheries subsidies in 2013 alone.
Nearly all of that money paid for cheap fuel that allowed and arguably encouraged Chinese fishermen to venture further from shore, often into the comparatively un-plundered exclusive economic zones of countries such as Indonesia.
Worse, the Chinese military has openly abetted those efforts by subsidizing everything from ice to GPS on Chinese fishing boats.
The goal: to solidify China's claim to "historical fishing rights" in the vast and deeply contested South China Sea.

Chinese regulators are fighting a losing battle against these other wings of the government.
In 1999, China imposed a seasonal fishing ban in the South China Sea, and in 2002 regulators did the same in sections of the Yangtze River.
But the continued deterioration of both fisheries only underscores how ineffective those restrictions have been.
In response, in 2013 one Chinese scientist proposed an outright 10-year moratorium on fishing in the economically essential Yangtze.
This week, Chinese officials signaled they were open to the idea and were even considering a wholesale culling of China's fishing fleet.

While both measures would be a boon to Asia's fisheries, they're only a start.
To make a real difference, China would need to demilitarize its fishing fleets and end the ruinous military-funded fuel subsidies that are encouraging unregulated catches, not to mention raising geopolitical tensions.
Fishing fleets should be regulated by civilian marine and agricultural authorities, not generals with little interest in environmental sustainability.

Equally important, China should explicitly link the task of reviving and preserving fisheries to the clean water and other environmental initiatives in its economic planning documents, including the government's five-year plans.
Doing so would raise them to a national priority akin to cleaning up Beijing's air.

Those priorities could then be extended to trade agreements, including the Regional Comprehensive Economic Partnership (RCEP) China's currently negotiating with other Asian nations, as well as bilateral deals with other claimants in the South China Sea.
The goal should be to make China a leader -- and perhaps even a brand -- in sustainable seafood.
With luck, that would buy China not just more fish to eat, but a reputation as a responsible global citizen.

Links :


Monday, August 22, 2016

What causes travel sickness? A glitch in the brain

Although one third of the population suffers from motion sickness, scientists aren't exactly sure what causes it.
Like the common cold, it's a seemingly simple problem that's still without a cure.
And if you think it's bad on a long family car ride, imagine being a motion sick astronaut!
Rose Eveleth explains what's happening in our bodies when we get the sea sick blues.

From The Guardian by Dean Burnett

With everyone holidaying for summer, travel sickness is going to be an issue for many.
But why? It could be an evolution-based glitch in the brain

lot of people, when they travel by car, ship, plane or whatever, end up feeling sick.
They’re fine before they get into the vehicle, they’re typically fine when they get out.
But whilst in transit, they feel sick.
Particularly, it seems, in self-driving cars.
Why?
One theory is that it’s due to a weird glitch that means your brain gets confused and thinks it’s being poisoned.
This may seem surprising; not even the shoddiest low-budget airline would get away with pumping toxins into the passengers (airline food doesn’t count, and that joke is out of date).
So where does the brain get this idea that it’s being poisoned?
Despite being a very “mobile” species, humans have evolved for certain types of movement.
Specifically, walking, or running.
Walking has a specific set of neurological processes tied into it, so we’ve had millions of years to adapt to it.

Think of all the things going on in your body when you’re walking, and how the brain would pick up on these.
There’s the steady thud-thud-thud and pressure on your feet and lower legs.
There’s all the signals from your muscles and the movement of your body, meaning the motor cortex (which controls conscious movement of muscles) and proprioception (the sense of the arrangement of your body in space, hence you can know, for example, where your arm is behind your back without looking at it directly) are all supplying particular signals.

There’s also the vestibular system, which includes the balance sensors; tiny fluid-filled tubes in our ears.
The fluid responds to the laws of physics, so moves about in response to acceleration and gravity, so we can tell when we’re upside down, for example.
And, of course, there’s our vision.
When we walk, the world travels past on our retinas at a steady rate, and there’s the gentle side-to-side rocking caused by our hips and legs etc.

 Being sick at home is hard; being sick on a boat can be unbearable!
Keep sea sickness from ruining your vacation by following a few of our easy steps.

When we’re walking, all of this sensory information is fed into the fundamental, subconscious areas of the brain, like the thalamus, that integrate it into one coherent and rich perception of ourselves and the world around us.
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However, vehicles haven’t been around long enough for our brains, at such fundamental levels, to “recognise” when we’re travelling in one.
Because when you’re travelling, all the usual signals of movement are absent.
Your muscles are still.
You’re sat down.
Being inside the enclosed space of the vehicle even restricts your view of the outside world, so your eyes don’t see much passing by.
This all results in sensory information that says to the fundamental brains regions “we are stationary”.
Not the vestibular system though; the fluid in your ears obeys physics, travelling at high speeds means it sloshes around even more than usual, so it’s telling the brain “we are really moving”.
That means these fundamental regions are getting mixed signals; usually reliable senses are now disagreeing.
What the hell can cause that? As far as the lower brain is concerned, only one thing; neurotoxin, aka poison.
And what’s the quickest way to get rid of poison? Throw up.
And so, we feel nauseous, and often vomit.

 Deadliest Catch - Crews Get Over Seasickness
Production crew members try to find their sea legs and avoid hot-headed crewmen.

You can see why this might be more common in self-driving cars; there’s a lot of physical movement and watching the road when driving, so the signals aren’t so mixed.
Take that and its associated movements away, and it wouldn’t be surprising to see increased motion sickness.
Some of you will know I cover all this in my book The Idiot Brain, so why rehash it here.
Well, the US version of the book was released three weeks ago.
I did some publicity for it, one item of which was an appearance on NPR’s Fresh Air, hosted by Terry Gross.

In this interview, I was asked about the part of the book that looks at travel sickness.
An interesting little hook to bring up in the mainstream, perhaps.
The New York magazine certainly thought so, dedicating a whole article to my offhand mention.
It has since snowballed from there, spreading from platform to platform to platform to platform to platform to (scientifically questionable) platform, finally arriving back here in the UK, where it started.

Now it’s appeared in the Mail, the Sun and the Telegraph.
This puts us in the slightly weird scenario where the Guardian was likely to be the only UK paper that hasn’t mentioned it, despite the fact that the originator of the story is already working for them!
 So I felt I’d best address it here.

 Cruise ship caught in furious storm

Another reason to cover it is that, as with most things that spread like this, inaccuracies, distortions and misinterpretations gradually seep in.
Now I’m reading stories that mention me by name that include claims and assertions that I’ve never heard before.
So, I’d like to clarify a few points.
I did not discover this mechanism, I just read about it.

It is not a new discovery.
I read about it years ago and didn’t realize until recently it wasn’t common knowledge.
It even has a Wikipedia page.

This is not definitely the mechanism why which motion sickness occurs.
There are other theories.
It may be a combination of all these things, or something else.
The one described above is the most persistent theory though.
And finally, anyone who has classed me an “expert” on something should be approached with caution.

Sunday, August 21, 2016

A journey to the Arctic


Have you always wanted to meet a polar bear eye to eye?
We’re excited to tell you that now you can...
To best enjoy this virtual reality film, view it on your phone or a VR headset.
Visit www.savethearctic.org to find out more

Saturday, August 20, 2016

Googly-eyed stubby squid


The team spotted this Stubby Squid off the coast of California at a depth of 900 meters (2,950 feet). The stubby squid (Rossia pacifica) looks like a cross between an octopus and squid, but is more closely related to cuttlefish.
This species spends life on the seafloor, activating a sticky mucus jacket and burrowing into the sediment to camouflage, leaving their eyes poking out to spot prey like shrimp and small fish.
Rossia pacifica is found in the Northern Pacific from Japan to Southern California up to 300m, but in addition to our sighting, researchers at the Monterey Bay Aquarium Research Institute (MBARI) have spotted them at depths of 1,300 m (4,260 ft).
E/V Nautilus is exploring the ocean studying biology, geology, archeology, and more.

Friday, August 19, 2016

Life thriving on UK's biggest underwater mountains

Anton Dohrn Seamount is a former volcano and stands approximately 1800 m high (taller than Ben Nevis, Snowdon and Scafell Pike!), with its summit sitting approximately 550 m below sea level.
East Rockall Bank is a steep escarpment descending into the Rockall Trough to a depth of approximately 1600 m.
George Bligh Bank extends from approximately 450 m below sea level down to a depth of 1300 m. The Wyville Thomson Ridge is a rocky plateau that forms part of the Greenland-Scotland Ridge, running from East Greenland to Scotland.
The top of the ridge sits approximately 300 m below sea level, running down to depths of over 1000 m.
Rosemary Bank Seamount is an extinct volcano that stands approximately 1900 m high, with its summit rising to approximately 500 m below sea level.
The Hebridean Continental Shelf extends to depths of over 2200 m and is home to the Hebrides Terrace Seamount, an ancient volcano that rises to approximately 1000 m below sea level.


 UK seamounts off the west coast of Scotland with the GeoGarage (UKHO charts)

From BBC buy Rebecca Morellz

Life is thriving on the UK's tallest underwater mountains, an expedition has revealed.

Scientists used robotic submersibles to dive more than 2,000m beneath the waves to explore four seamounts off the west coast of Scotland.

 Short video providing information on the Deep Links project.
Video courtesy of the NERC funded Deep Links Project - Plymouth University, Oxford University, JNCC and British Geological Survey.

The footage revealed vast coral reefs, and an array of crustaceans and fish living in the cold, dark waters.
The team also collected thousands of samples, and believe many species may be new to science.
Dr Kerry Howell, a deep sea biologist at Plymouth University, told BBC News: "Lots of people think of the deep sea as being a sort of desert of mud.
"And in fact these mountain structures are far from that - [there are] so many animals, so much life."

Coral gardens stretching for many kilometres blanket the UK's submerged mountains
Image copyright Deep Links

 A lepidion fish was one of many species discovered on the seamounts
Image copyright Deep Links

The Deep Links project team, a collaboration between Plymouth University, the University of Oxford, the Joint Nature Conservation Committee and the British Geological Survey, spent six weeks at sea onboard the RSS James Cook.
Of the four underwater mountains they explored, the biggest - the Anton Dohrn - stands at 1,700m tall. It would dwarf Ben Nevis, which has a peak of 1,344m - yet it is totally submerged.
The scientists say until now these unique habitats have been little explored.

The animals have to withstand cold, darkness and extreme pressure 
Image copyright Deep Links

Dr Howell explained: "We don't know very much about the underwater mountains off the coast of the UK.
We went there initially in 2005, and that was the first time anyone had taken cameras there. But the footage wasn't great and technology has moved on since then.
"So this time we were able to take really sophisticated robots there with HD film, and get really fantastic quality images."

The team mapped the Anton Dohrn - at 1,700m, the UK's tallest mountain
The seamount is about 45 km wide and is a former volcano that was last active around 40-70 million years ago.
Its summit has since been eroded by waves to give the seamount a flat, fairly uniform top.
Steep slopes extend down the side of the seamount to a moat at around 2400 m deep.
This short video shows you just what the seamount looks like underwater.
 Image copyright Deep Links

 The expedition was carried out aboard the RSS James Cook off the west coast of Scotland
 Image copyright Deep Links

 An ROV controlled from the ship deck was deployed to explore the deep mountains
Image copyright Deep Links

The scientists were able to control the Isis Remotely Operated Vehicle (ROV) from the deck of the ship, to record video, take photos and scoop up samples as it explored the deep.
They also deployed Autosub 6000, an autonomous robot, to map the mountains.
"You see the sea floor coming out of the gloom, and you don't know what you are going to find," said Dr Michelle Taylor, a deep sea biologist from the University of Oxford.
"This is the first time that anybody has seen this sea mount, has seen the animals that live on this seamount, how they live, what they live on, who lives with them - and that's really exciting."

 The team found huge sponges that were colonised by tiny animals
 Image copyright Deep Links

The team found brightly coloured cold-water coral reefs that stretched for many kilometres.
Some of the species were several metres high, while others were thought to be thousands of years old.
They discovered huge sponge gardens crammed with tiny animals, crustaceans, including deep-sea crabs and shrimps, basket stars, sea anemones, and many fish species, including lepidions and chimaeras, which are related to sharks.
It will take the team many months to analyse all of the footage and carefully examine the specimens they collected.
Even at this stage, they expect there could be many species new to science.

The team found that overall the seamounts were in good condition, with most designated as Marine Protected Areas.
However, the scientists still found signs of human impact, including litter and trawl marks, and they are concerned about how climate change may affect these habitats in the future.
Dr Taylor said: "It's very important to understand what lives in these locations because they might change - and they might change forever."

 Protection is helping species like this cold-water coral covered in sea urchins to thrive
 Image copyright Deep Links
The team say they want to track how seamounts change over time
 Image copyright Deep Links

 Thousands of samples were collected - it will take months to analyse them all 
 Image copyright Deep Links (see YouTube)

Dr Howell added that the reefs were among the best she had ever seen.
"These mountains are British, they are in British waters - and they support such an amazing diversity of life," she told the BBC.
"And the fact the UK has its own coral reefs, people don't appreciate that.
"These reefs are enormous and in really great condition - [they are] so beautiful, so important - and I really hope that people can appreciate what they have on their doorstep."

Links :
  • DailyMail : Footage captured by underwater robots reveals what deep-sea life is like more than half a mile beneath the surface