Live fish, shrimps, caught at record depth


This video is called CREATURES OF THE DEEP OCEAN (Full Documentary).

From the BBC:

Live fish caught at record depth

By Anna-Marie Lever
Science and Nature reporter, BBC News

A live deep-sea fish has been caught at a record depth of 2,300m on the hot vents of the Mid-Atlantic Ridge.

Three shrimp species were also pulled to the surface, researchers report in the journal Deep-Sea Research.

Scientists have engineered a new device that allows recovery of live animals under their natural pressure at greater depths than previously achieved.

Next they hope to be able to transfer the animals into an experimental lab to study their normal biology.

“Pressurised recovery has been around for the past 30 years, but this is the deepest fish-capture under pressure – the previous record was 1,400m. This is also the first time pressurised capture has occurred at a hydrothermal vent,” said Dr Bruce Shillito, marine biologist at the Universite Pierre et Marie Curie, Paris, France.

The shrimp species were caught at 1,700m (5,600ft; Mirocaris fortunata and Chorocaris chacei) and 2,300m (7,500ft; Rimicaris exoculata) at two vent fields, Lucky Strike and Rainbow, on the Mid-Atlantic Ridge.

Dr Shillito explains: “At depths of over 1,000m, it is difficult to recover animals alive. Catching with no pressure is as good as catching dead. Fish are the most fragile – even a fisherman with a 100m line will probably reel in a catch whose gas bladder is in its mouth.”

Although the fish caught by the team was a zoarcid (Pachycara saldanhai) and had no gas bladder, it was sensitive to full decompression.

Video about this is here.

6 thoughts on “Live fish, shrimps, caught at record depth

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  2. Bahrain’s Shrimp Stocks See Huge Drop of 75 per cent

    08 August 2013

    BAHRAIN – Bahrain’s shrimp population has dropped by 75 per cent due to illegal fishing. More than 200 local dhows have been caught illegally fishing during the four-month shrimping ban.

    The illegal fishers have been fined up to BD300 ($793) and had their licences temporarily suspended, Fishermen’s Protection Society president Jassim Al Jeran was quoted as saying in the Gulf Daily News, reported TradeArabia.

    “Shrimp populations are only 25 per cent of what they were compared with last year,” Al Jeran told the newspaper.

    “So when legal shrimpers came back this year, the population was diminished and many of them are not shrimping as frequently because it is just not worth it.

    “There are 400 fishermen, 270 dhows and 100 boats registered to catch shrimp. They are bringing in between 200 and 300 large containers daily. The quantity is enough currently, but prices have increased from BD1.5 to BD2 per kilo. It is still unknown how it will affect the future supply of shrimp in the local market.”

    Last year, more than 150 dhows were caught breaking the law during off-season, which Mr Al Jeran said was in place to protect the country’s stock.

    “No less than 200 vessels were caught during the ban this year,” he said. “They used tactics such as switching off their lights and parking their vessels closer to the shore lines. Those who did shrimp during the ban did so in bulk, which has drastically affected the population.”

    “Those who got caught would have to pay fines ranging from BD150 to BD300 and those who cannot afford to pay the fine will have their fishing licences suspended for a week or two,” he added.

    http://www.thefishsite.com/fishnews/20970/bahrains-shrimp-stocks-see-huge-drop-of-75-per-cent#sthash.BFmBhi7t.dpuf

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