Inuit

A Canadian judge in the northern province of Nunavut has curtailed the plans of several joint German-Canadian Arctic experiments after Inuit residents commented that the testing could harm marine life, sources from within the government revealed on Monday.

A judge for the territory, granted a last minute injunction this past Sunday, putting a hold on a major seismic program that was set to begin Monday in Lancaster Sound, north of Baffin Island.

The experiments, which were designed to help unearth the early history of our planet, were being carried out by Natural Resources Canada in conjunction with the Alfred Wegener Institute in Germany.

Susan Cooper, a fellow Justice, was in complete agreement with the fears that the Inuit communities were expressing, that the experiments, including the firing of an air gun under the water to collect data, could have a negative effect on the walruses, seals and whales in the area.

While the devices would not prove fatal to the sea creatures, it could possible make them deaf, and scare them away from the area for an extended period of time, explains an attorney for the Inuit, David Crocker.

“If the Inuit are right, they could lose their livelihood, their food source, their way of life,” Crocker commented to the AFP.

The Canadian government has not commented if it will appeal the decision or not.

So it looks like, for the time being at least, that the plans for gaining knowledge of the area have been put on ice, and if an appeal isn’t made soon, the tests will need to be conducted next year instead.

A conglomerate of Canadian and Spanish researchers have discovered new marine life, which have been previously unknown to the scientific community, and some are even over a 1,000 years old. They are hoping that these creatures will shed some light into the secrets of the ancient underwater ecosystems.

Scientists from the Spanish Institute of Oceanography in conjunction with three Canadian universities and the Fisheries Department are going on a 20 day expedition to take some photos and pick up samples of coral and sponges up to 3 kilometers deep in the cold waters off the Newfoundland coast.

The team will be studying 11 different areas which are under the protection of the North Atlantic Fisheries Organization.

These are important areas of study as they are the home to the “trees of the ocean” explains a research scientist with the Fisheries Department, Ellen Kenchington. Ellen is also leading the expedition.

The coral which can be found in these areas can be several meters tall and is sufficient enough in size to change the flow of currents. It is also the home to many other fish and other aquatic life.

The aim of the study is to see whether or not these areas need further protection from fishing to help keep the species abundant.

Ellen went on to explain that scientists can actually take a look at the chemical makeup of the coral and figure out the temperature of the water and other information dating back as far as 1,000 years!

For pictures see
http://www.montrealgazette.com

For the first time, a viral hemorrhagic septicemia virus (VHSV or VHSv) has been identified in fish from Lake Superior, the largest of the five Great Lakes of North America.

The virus was identified by researchers at the Cornell University’s College of Veterinary Medicine and the finding has also been confirmed by the United States Geological Survey’s (USGS) Western Fisheries Research Center in Seattle.

The virus causes viral hemorrhagic septicemia (VHS) in fish and can result in significant losses in wild and captive raised fish populations.

“VHS is one of the most important diseases of finfish,” says James Winton, a VHSV expert working at the Western Fisheries Research Center. “It not only affects the health and well-being of populations of several important native fish species, but it can also impact trade, and, should it spread into the U.S. aquaculture industry, could do substantial damage as happened in Europe and parts of Japan.”

The infection is one of only nine fish diseases that must be reported to the World Organization for Animal Health. Until 2005 it was not known to exist in the Great Lake system but that year it caused several massive die-offs. Since then the virus has been detected in all of the Great Lakes except Lake Superior, and was for instance the culprit when 40,000 freshwater drums died in Lake Ontario over the course of just four days. In addition to the Great Lakes, the virus is also present in the rivers of Niagara and St. Lawrence and in inland lakes in New York, Michigan and Wisconsin.

Previous genetic research carried out by scientists in Canada and the United States show that the VHS virus was probably introduced to the Great Lakes during the last 5-10 years.

Experts now fear that current federal and state restrictions placed upon the movement of fish and fish products won’t be enough to prevent the virus from reaching native fish in the 31 states of the Mississippi River basin.

A marine park will be formed at Camden Sound, Australia, in an effort to protect the Humpback whale (Megaptera novaeangliae). Once hunted to the brink of extinction, the humpbacks have already bounced back considerably thanks to conservation efforts and they are now much sought after by whale-watchers, particularly off parts of Australia, Canada, and the United States.

“The Government recognises the Kimberley as one of Australia’s special places,” said Premier Colin Barnett as he unveiled the plans for the park. “That is why we are protecting Camden Sound, making it a marine park, and developing and implementing our Kimberley Science and Conservation Strategy. This strategy will balance the need to develop industry and create wealth with the expectation that the environment and special places will be protected. This remarkable area warrants protection as a first step in the broader conservation of the Kimberley.”

Environment Minister Donna Faragher added that Camden Sound is the largest calving area for humpbacks in the southern hemisphere.

“More than 1000 humpback whales can be found in the Camden Sound ‘maternity ward’ during the calving season,” Faragher said. “They are part of the biggest population of humpback whales in the world – numbering about 22,000 – that migrate from Antarctica every year to give birth in the waters off the north of our State.”

Faragher said the park will be created in consultation with the local indigenous community and all stakeholders with an interest in the area.

Allowing for consultation, including a public comment period of three months, a marine park could be established as early as mid-2010.

Camden Sound

Camden Sound is a bay in the Indian Ocean situated in the Kimberley region of Western Australia. The sound is a highly bio-diverse region; home to animals such as dugongs, crocodiles, sea-snakes, sharks, rays, and three species of sea turtle. Indo-Pacific humpbacked dolphins, Bottle-nosed dolphins, and the newly recognized Snub-fin dolphin can all be found within the borders of the proposed marine park. The sound is also visited by several species of whale, including False Killer whale, Bryde’s whale, Minke whale, and Dwarf Sperm whale. The corals reefs in the region are still fairly unharmed and varied the extensive mangrove forests found along the shores acts as nursery areas for fish and invertebrates.

Humpback whales born in Camden Sound stay there for several months after birth to grow big and strong enough to survive the long journey to the chilly Arctic waters where the humpbacks feed during the summer.

According to a new research report released by Canadian scientists, American lobsters use jet propulsion to gain extra speed as the walk across the ocean floor. The lobster can produce 27 to 54mN of thrust, which is comparable to that produced by the pectoral fins of proficient swimmers like the Bluegill sunfish (Lepomis macrochirus) and Surfperch (Embiotoca jacksoni).

On the abdomen, the American lobster has tiny paddle-like structures, formally known as pleopods, which it can fan to create a wake that propels it forward. To understand why the lobster fans its “paddles”, graduate student Jeanette Lim and Professor Edwin DeMont of St Francis Xavier University in Antigonish built a mechanical model which replicates the moving parts of the lobster belly.

“No one had actually measured how much force the American lobster’s pleopods could produce,” says Lim. “We just took the abdomen of a lobster, emptied out the tissues, and hooked up eight mini servomotors bought from a robotic toy company in California to the pleopods.”

To image and measure how the plepods affected the surrounding water, the researchers used a technique called particle image velocimetry.

“Once we saw the flow visualisations, we were surprised with how large the wake was,” says Lim, now studying for her PhD at Harvard University in Boston, US. “The pleopods on American lobsters (Homarus americanus) are relatively broad and paddle-shaped compared to pleopods on crayfish, for example. But they are still fairly diminutive and rather flimsy appendages when you consider the size and toughness of the rest of the body. So we were surprised their beating produced a sizable wake with thrust that was on par with forces produced by the fins of some swimming fish.”

The results have been published in the Journal of Experimental Biology.

If everything goes according to plan, the world’s largest ocean observatory will be ready for use by late September, except for the instruments at one node which won’t be installed until next year.

“Scientists and staff at NEPTUNE Canada are delighted to begin the final phase of installation following a decade of planning,” says Dr. Chris Barnes, director of NEPTUNE Canada.

NEPTUNE Canada, the world’s most advanced cabled ocean observatory, consists of five 13-tonne nodes and more than 400 instruments and sensors that will be placed on the seafloor off the coast of British Columbia with the aid of three ships, one Remotely Operated Vehicle (ROV), and a team of scientists and marine engineers. The observatory will be attached to a loop of powered fibre-optic cable which was put in place in 2007.

NEPTUNE Canada will use the Internet to transmit information to land-based scientists across the world, thus making it possible for researchers to experiment and investigate the deep sea without having to get their feet wet (or die from the immense pressure). NEPTUNE Canada will also carry out long-term monitoring of ocean processes and events.

“This is truly transformative science,” says Dr. David Turpin, president of the University of Victoria. “At a time when our understanding of the oceans is clearly becoming more essential than ever, NEPTUNE Canada will play a leadership role in advancing our knowledge of the oceans in ways not previously possible. We are launching a new era of ocean exploration.”

NEPTUNE Canada has been designed to withstand the intense pressure and cold of the deep sea as well as trawlers and corrosive saltwater.

“Working with industry partners, we’ve developed a host of novel science experiments, advanced engineering and sensor technologies and innovative data management systems”, says Dr. Barnes. “This is a very exciting time for ocean science.”

A lot of the technology fitted to the observatory is cutting-edge solutions that are now being deployed for the very first time.

Much of the infrastructure for NEPTUNE Canada is being designed, manufactured and installed by Alcatel-Lucent and its main subcontractors. Other main partners are the University of Victoria, the research ship Atlantis operated by the Woods Hole Oceanographic Institution and the research ship Thompson operated by the University of Washington. The project is funded chiefly by the Government of Canada, the Canada Foundation for Innovation, the Natural Sciences and Engineering Research Council of Canada, CANARIE, and the Government of British Columbia through the BC Knowledge Development Fund.

A team of U.S. scientists has documented the first transmission of the lethal phocine distemper virus from the Atlantic Ocean to a population of sea otters living along the coast of Alaska.

The presence of phocine distemper virus has been confirmed in nasal swabs take from live otters and through necropsies conducted on dead otters found along the Alaskan coast. The findings also indicate that the virus was passed between seal species across Northern Canada or Arctic Eurasia before reaching the otters in Alaska’s Kachemak Bay.

Prior to this study, PDV had never been identified as the cause of illness or death in the North Pacific Ocean and researchers suggest that diminishing Arctic sea ice may have opened a new migration route for both animals and pathogens.

The study was carried out by researchers from two California universities and the Alaskan branch of the U.S. Fish and Wildlife Service. It has been published in ”Emerging Infectious Diseases”, a journal published by the U.S. Centers for Disease Control and Prevention.

What is phocine distemper virus (PDV)?

Phocine distemper virus (PDV) is a paramyxovirus of the genus Morbillivirus. It is dangerous for pinniped species, especially seals, and is a close relative of the canine distemper virus (CDV).

PDV was first identified in 1988 when it caused the death of approximately 18,000 harbour seals, Phoca vitulina, and 300 grey seals, Halichoerus grypus, in northern Europe. In 2002, the North Sea lost approximately 21,700 harbour seals in new a PDV outbreak – estimated to be over 50% of the total population.

Infected seals normally develop a fever, laboured breathing and nervous symptoms.

In an effort to end the country’s reliance on imported uranium, Dr Masao Tanada of the Japan Atomic Energy Agency has developed a fabric capable of absorbing uranium directly from seawater.

“At the moment, Japan has to rely on imports of uranium from Canada and Australia, but this technology could be commercially deployed in as little as five years,” says Tanada.

In Canada and Australia, the uranium is extracted in conventional mining operations which are expensive and damaging to the environment.

Dr Tanada is now hoping to secure funding to set up a 400 square mile underwater “uranium farm” consisting of anchored sponges made from the new material; a fabric composed primarily of irradiated polyethylene.

The world’s oceans contain an estimated 4.5 billion tons of uranium; roughly 3.3 parts per billion. Japan uses 8,000 tons of uranium per annum; an amount that Dr Tanada says could be harvested from the Kuroshio Current that flows along Japan’s eastern seaboard. His proposed 400 square mile farm would on its own supply Japan with roughly one-sixth of what it needs to run its nuclear power stations.

A rare orange-and-yellow lobster has been found off the coast of Prince Edward Island in Canada. Instead of the drab colours normally sported by lobsters, this female specimen boosts a spotted orange-and-yellow pattern. According to specialists, she’s one in about 30 million.

The colourful lobster is currently housed with roughly 100 other lobsters at Arnold’s Lobster and Clam Bar in Eastham, whose owner Nathan “Nick” Nickerson has named her “Fiona” after his girlfriend’s granddaughter. Getting a name is not the only special treatment she’s been awarded; unlike the other inhabitants of the tank her claws are not bound with rubber bands and she can therefore keep her house mates at bay. Lobsters can be cannibalistic, especially in crowded environments, but Nickerson says Fiona is “not very aggressive.”
Arnold’s Lobster and Clam Bar has not put the rare orange-and-yellow lobster on the menu.

“Gosh no!” Nickerson said. “That would be like steaming a Rembrandt.”

Instead, Fiona has gotten used to fine dining at Arnold’s – she’s kept on a diet of Yellowfin tuna of sushi quality while the other lobsters have to make do with cod fish. Nickerson plans on continuing to pamper her for a while before donating her to the Cape Cod Museum of Natural History in Brewster or to the New England Aquarium.

Nickerson received Fiona as a gift from his fried Michael R. Gagne, sales manager at Ipswich Shellfish Company Inc. who says Fiona is a “once-in-a-lifetime lobster”.

1According to Michael F. Tlusty, director of research at the New England Aquarium, Fiona’s distinctive coloration is caused by a rare genetic mutation. He estimated she might be 7 years old based on her weight, but how she managed to survive for so many years in her eye-catching garb is a true mystery.

“If you’re swimming over a muddy bottom, it would be much easier to see a yellow lobster than a normal-colored lobster,” said Tlusty, who has been studying lobsters for 10 years.

“Why was she able to survive with her coloration?” Tlusty asked. “That’s something we’re not quite sure of.”

The famous Sharktooth Hill Bone Bed near Bakersfield has tantalized the imagination of scientists and laymen alike since it was first discovered in the 1850s. How did a six-to-20-inch-thick layer of fossil bones, gigantic shark teeth and turtle shells three times the size of today’s leatherbacks come to be?

Was this a killing ground for C. megalodon, a 40-foot long shark that roamed the seas until 1.5 million years ago? Perhaps a great catastrophe like a red tide or volcanic eruption led to animal mass-death in the region? Or is this simply the result of Sharktooth Hill being used as a breeding ground for generations of marine mammals throughout the millennia?

A research team consisting of palaeontologists from the United States and Canada are now offering their take on the Bone Bed, suggesting it is not the result of a sudden die-off or a certain predator. Instead, the North American team sees it as a 700,000-year record of normal life and death, kept free of sediment by unusual climatic conditions between 15 million and 16 million years ago.

The research team bases its hypothesis on a new and extensive study of the fossils and the geology of Sharktooth Hill. Roughly 3,000 fossilized bone and teeth specimens found in various museums, including the Natural History Museum of Los Angeles County (NHM) and UC Berkeley’s Museum of Paleontology (UCMP), have been scrutinized, and the researchers also cut out a meter-square section of the bone bed, complete with the rock layers above and below.

“If you look at the geology of this fossil bed, it’s not intuitive how it formed,” says Nicholas Pyenson, a former UC Berkeley graduate student who is now a post-doctoral fellow at the University of British Columbia. “We really put together all lines of evidence, with the fossil evidence being a big part of it, to obtain a snapshot of that period of time.”

The existence of a 700,000-year window through which we can catch a glimpse of the past is naturally magnificent news for anyone interested in evolution and Earth’s history.

When the Central Valley was a sea

When the Sharktooth Hill Bone Bed formed between 15,900,000 and 15,200,000 years ago, the climate was warming up, ice was melting and the sea level was much higher than today. What is today California’s Central Valley was an inland sea with the emerging Sierra Nevada as its shoreline.

After closely examining the geology of the Sharktooth Hill area, the research team was able to confirm that it had once been a submerged shelf inside a large embayment, directly opposite a wide opening to the sea.

Several feet of mudstone interlaced with shrimp burrows is present under the bone bed, which is typical of ocean floor sediment several hundred to several thousand feet below the surface. Inside the bone bed, most of the bones have separated joints, indicating that they have been scattered by currents.

“The bones look a bit rotten, as if they lay on the seafloor for a long time and were

abraded by water with sand in it“, says UC Berkeley integrative biology professor Jere Lipps.

Many bones also had manganese nodules and growths on them, something which can form when bones sit in sea water for a long time before they are covered by sediment. According to the team, the most likely explanation for this is that the bones have lain exposed on the ocean floor for 100,000 to 700,000 years while currents have carried sediment around the bone bed. The prevailing climatic conditions at the time have made it possible for the bones to accumulate in a big and shifting pile at the bottom of the sea.

“These animals were dying over the whole area, but no sediment deposition was going on, possibly related to rising sea levels that snuffed out silt and sand deposition or restricted it to the very near-shore environment,” says Pyenson. “Once sea level started going down, then more sediment began to erode from near shore.”

The team discards the breeding-ground hypothesis due to the scarcity of remains from young and juvenile animals. Hungry Megalodon sharks being the main contributors to the bone pile is also unlikely, since few bones bear any marks of shark bites. If the bone bed was the result of mass-death caused by an erupting volcano the absence of volcanic ash in the bed would be very difficult to explain, and the presence of land animals like horses and tapirs that must have washed out to sea make the red-tide hypothesis equally thin.

Amazing remains from the past

The Sharktooth Hill Bone Bed covers nearly 50 square miles just outside and northeast of Bakersfield in California and is one of the richest and most extensive marine deposits of bones in the world. Studied parts of the bone bed average 200 bones per square meter, most of them larger bones. Ten miles of the bed is exposed, and the uppermost part of the bed contains complete, articulated skeletons of whales and seals.

Within the bone bed, scientists have found bones from many species that are now extinct and the bed provides us with invaluable information about the evolutionary history of whales, seals, dolphins, and other marine mammals, as well as of turtles, seabirds and fish. Sharktooth Hill is naturally the sight of some impressive shark findings too, including shark teeth as big as a hand and weighing a pound each.

A small portion of the bone bed was added to the National Natural Landmark registry in 1976 but the rest is in dire need of protection.

A collaborative effort

The research team, who’s study will be published in the June 2009 issue of the journal

Geology, consisted of:

– UC Berkeley integrative biology professor Jere Lipps, who is also a faculty curator in UC Berkeley’s Museum of Paleontology.

– Nicholas Pyenson, a UC Berkeley Ph.D who is now a post-doctoral fellow at the University of British Columbia.

– Randall B. Irmis, a UC Berkeley Ph.D who is now an assistant professor of geology and geophysics at the University of Utah.

– Lawrence G. Barnes, Samuel A. McLeod, and Edward D. Mitchell Jr., three UC Berkeley Ph.D’s who are now with the Department of Vertebrate Paleontology at the Natural History Museum of Los Angeles County.