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Tag: "metres" at biology news

NASA probe could reveal comet life, scientists claim

... at 25,000 miles per hour and will penetrate 15-20 metres into the surface before exploding. The comet will remain intact despite losing a huge amount of material ?100,000 tonnes from a 100 metre diameter crater, and the impact is not expected to alter the comet's orbit. "Not only is Deep Impact a spectacu...

Plankton can run, but can't hide from basking sharks

...ing shark abundance by at least 10-fold. Up to 10 metres long and weighing up to 7 tons - about the size of double-decker bus - the basking shark is the world's second largest fish and feeds by filtering plankton from sea water through its enormous mouth. It is able to filter up to 2,000 tons of water per ...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

... water availability in drylands today (1,300 cubic metres per capita per year, already below the threshold of 2,000 considered a minimum for meeting human needs), is expected to fall further due to a combination of pressures in and around the drylands including population growth, reduced freshwater availabi...

Extinct giant deer's descendant found in UK

...scendant, reaching a shoulder height of around two metres with antlers spanning 3.5 metres (10 feet). Deer from around the world (including the southeast Asian axis deer, the hog deer and fa...

Study Holds Promise For New Way To Fight HIV

...scendant, reaching a shoulder height of around two metres with antlers spanning 3.5 metres (10 feet). Deer from around the world (including the southeast Asian axis deer, the hog deer and fa...

The Antarctic Ocean floor

...cientists will trawl the ocean floor at up to 2000 metres depth, using both Agassiz-trawl fitted with a closed net as well as a Box-corer. The two methods are complementary. With the Agassiz-trawl a corridor of the sea floor is swept to catch all the species on the way in a mixed form. On the other hand th...

Tsunami + 1 year: Reviving exhausted fisheries should trump replacing boats, gear, experts say

...of bottom swimming (demersal) fish at depths to 50 metres in the Straits of Malacca off the west coast of Malaysia declined to 11% of levels at the beginning of the 1970's. A similar trend is found for deeper waters of the Straits, for Indonesian fisheries in the Java Sea, and indeed for most coastal fishe...

Health of coral reefs detected from orbit

...ERIS sensor can detect coral bleaching down to ten metres deep. This means Envisat could potentially monitor... detecting from 7-8% bleached coral even under ten metres of water. "MERIS Full Resolution covers the world every three days, a bottleneck for global monitor...

The world's deepest dinosaur finding - 2256 metres below the seabed

...osaur happened in the North Sea, at an entire 2256 metres below the seabed. It had been there for nearly 200...a Plateosaurus, a species that could be up to nine metres long and weigh up to four tons. It lived in Europe and on Greenland 210 to 195 million years ago, at...

Researchers unravel DNA tangles and enzyme seamstresses

Almost three metres of tightly-coiled DNA strands fit into a cell's nucleus. As DNA replicates, the strands unwind and unfold and then re-package into chromosomes, the genetic blueprints of life ?but what happens if this process becomes entangled? Untangling the heaps ...

Tyrannosaur survivorship -- tough times for teens

... be at least 22, which range from two to almost 10 metres in total length. For this latest paper, Currie c..., at which point they reached total lengths of six metres or 60 per cent of their maximum recorded size. At that point, mortality rates escalated to more than...

Global warming may have damaged coral reefs forever

...hers, who surveyed 21 sites and over 50,000 square metres of coral reefs in the inner islands of the Seychelles in 1994 and 2005. Their report is the first to show the long-term impact of the 1998 event where global warming caused Indian Ocean surface temperatures to increase to unprecedented and sustain...

Too mellow for our predatory world

...essure tolerated a human approach up to one or two metres and failed to mount a stress response even during sustained chasing. Darwin had already described the remarkable tameness of these animals, also termed "low wariness", during his voyage on the Beagle in 1835. In marine iguanas living with an intermed...

Extraordinary life found around deep-sea gas seeps

...The Builder's Pencil", covers about 180 000 square metres (0.18 square kilometre), making it one of the largest seep sites in the world', says Dr Rowden. A few cold seep sites were previously known along the New Zealand coast from geological and biogeochemical studies of the continental margin. But this i...

Coral stress 'like never in history'

...ninsula, which are now cliff faces rising up to 25 metres above the beach, A/Prof. Pandolfi and his team were able to see where large scale disturbances had occurred in the history of these reefs which dated back as far as 11 000 years ago. "The sequence of fossils is like a three dimensional movie of wh...

Reef warns of sea level rise

...lobal warming. A fossil coral reef, lying several metres above today's high tide mark at Foul Bay near Marg...an National University. "The reef lies about 2.5 metres above the current high tide zone, which means that for it to survive and grow, sea levels would have...

Dig deeper to find Martian life

...nough any closer to the surface of Mars than a few metres deep ?beyond the reach of even state-of-the-art dr...ear-subsurface of Mars ?within the first couple of metres below the surface ?in the face of the ionizing radiation field. Finding life on Mars depends on liqu...

Satellites shed light on global warming

...1995, and Larsen-B that broke away were 200 to 350 metres thick. According to Rott, only 1403 square kilomet...ca, which contain freshwater equivalent to several metres of sea-level rise," Rott added. Satellites have been extremely beneficial to scientists in under...

Fish growth changes enhanced by climate change

...ions ?faster growth in waters above a depth of 250 metres and slower rates of growth below 1,000 metres,?says lead author, Dr Ron Thresher. “These observations suggest that global climate change has enhanced some elements of productivity of shallow-water stocks but at the same time reduced the productivi...

Baby fish 'smell their way home'

...on reefs only a few kilometres or even hundreds of metres apart." This diversity between populations of the same fish species is what drives evolution on the Reef and underpins the spectacular richness of its sea life, Prof. Kingsford says. "This genetic separation between reefs may be what gives rise to...

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