An incredible and intense big-wave session
Links :
Saturday, September 10, 2011
Friday, September 9, 2011
Canada CHS update in the Marine GeoGarage
11 charts have been added and 35 charts have been updated (August 29) :
- 1312 LAC SAINT-PIERRE
- 1313 BATISCAN TO LAC SAINT-PIERRE
- 1550A BRITANNIA BAY TO CHATS FALLS
- 1550B BRITANNIA BAY TO CHATS FALLS
- 2067 HAMILTON HARBOUR
- 2086 TORONTO TO HAMILTON
- 3050A KOOTENAY RIVER
- 3050B KOOTENAY RIVER
- 3050C KOOTENAY RIVER
- 3050D KOOTENAY RIVER
- 3050E KOOTENAY LAKE
- 3050F KOOTENAY LAKE
- 3050G KOOTENAY LAKE
- 3050H KOOTENAY LAKE
- 3050I WEST ARM KOOTENAY LAKE
- 3050J WEST ARM KOOTENAY LAKE
- 3050K WEST ARM KOOTENAY LAKE
- 3050L WEST ARM KOOTENAY LAKE
- 3050M WEST ARM KOOTENAY LAKE
- 3050N KOOTENAY RIVER
- 3411 SOOKE
- 3443 THETIS ISLAND TO NANAIMO
- 3447 NANAIMO HARBOUR AND DEPARTURE BAY
- 3458 APPROACHES TO NANAIMO HARBOUR
- 3540 DISCOVERY PASSAGE APPROACHES TO CAMPBELL RIVER
- 3674 CLAYOQUOT SOUND MILLAR CHANNEL TO ESTEVAN POINT
- 3724 CAAMANO SOUND AND APPROACHES
- 3737 LAREDO CHANNEL - INCLUDING LAREDO INLET AND SURF INLET
- 3742 OTTER PASSAGE TO McKAY REACH
- 3910 PLANS
- 3941 CHANNELS VICINITY OF MILBANKE SOUND
- 3943 FINLAYSON CHANNEL AND TOLMIE CHANNEL
- 3947 GRENVILLE CHANNEL TO CHATHAM SOUND
- 3955 PLANS PRINCE RUPERT HARBOUR
- 3956 MALACCA PASSAGE TO BELL PASSAGE
- 3957 APPROACHES TO PRINCE RUPERT HARBOUR
- 3958 PRINCE RUPERT HARBOUR
- 4011 APPROACHES TO BAY OF FUNDY
- 4012 YARMOUTH TO HALIFAX
- 4099 SABLE ISLAND ILE DE SABLE - WESTERN PORTION
- 4116 APPROACHES TO SAINT JOHN
- 4141A SAINT JOHN TO EVANDALE
- 4141B GRAND BAY TO EVANDALE INCLUDING BELLEISLE BAY
- 4230 LITTLE HOPE ISLAND TO CAPE ST MARYS
- 4233 CAPE CANSO TO COUNTRY ISLAND
- 4234 COUNTRY ISLAND TO BARREN ISLAND
- 4235 BARREN ISLAND TO TAYLORS HEAD
- 4237 APPROACHES TO HALIFAX HARBOUR
- 4241 LOCKEPORT TO CAPE SABLE
- 4243 TUSKET ISLANDS TO CAPE ST MARYS
- 4245 YARMOUTH HARBOUR AND APPROACHES
- 4266 SYDNEY HARBOUR
- 4277 GREAT BRAS D'OR ST. ANDREWS AND ST. ANNS BAY
- 4278 GREAT BRAS D'OR AND ST PATRICKS CHANNEL
- 4281 CANSO HARBOUR AND APPROACHES
- 4367 FLINT ISLAND TO CAPE SMOKEY
- 4420 MURRAY HARBOUR
- 4429 HAVRE SAINT-PIERRE AND APPROACHES
- 4432 ARCHIPEL DE MINGAN
- 4529 FOGO HARBOUR SEAL COVE AND APPROACHES
- 4955 HAVRE-AUX-MAISONS
So 785 charts (1659 including sub-charts) are available in the Canada CHS layer. (see coverage)
Note : don't forget to visit 'Notices to Mariners' published monthly and available from the Canadian Coast Guard both online or through a free hardcopy subscription service.
This essential publication provides the latest information on changes to the aids to navigation system, as well as updates from CHS regarding CHS charts and publications.
See also written Notices to Shipping and Navarea warnings : NOTSHIP
Giant crabs make Antarctic leap
It's like a scene out of a sci-fi movie -- thousands, possibly millions, of king crabs are marching through icy, deep-sea waters and up the Antarctic slope.
"They are coming from the deep, somewhere between 6,000 to 9,000 feet down," says James McClintock, Univ. of Alabama at Birmingham Endowed Professor of Polar and Marine Biology. Source: UAB
"They are coming from the deep, somewhere between 6,000 to 9,000 feet down," says James McClintock, Univ. of Alabama at Birmingham Endowed Professor of Polar and Marine Biology. Source: UAB
From BBC
King crabs have been found on the edge of Antarctica, probably as a result of warming in the region, scientists say.
Writing in the journal Proceedings B, scientists report a large, reproductive population of crabs in the Palmer Deep, a basin cut in the continental shelf.
They suggest the crabs were washed in during an upsurge of warmer water.
The crabs are voracious crushers of sea floor animals and will probably change the ecosystem profoundly if and when they spread further, researchers warn.
Related species have been found around islands off the Antarctic Peninsula and on the outer edge of the continental shelf.
But here the crabs (Neolithodes yaldwyni) are living and reproducing in abundance right on the edge of the continent itself.
Search for life
The researchers sent the Genesis, a submersible remotely operated vehicle (ROV) from the University of Ghent in Belgium, into the Palmer Deep in March last year.
The idea was to look at what life was down there, rather than specifically to look for crabs; and the team was somewhat surprised by how many they found.
Judging by the density of the crabs and their tracks, the scientists estimate there may be 1.5 million crabs in the basin.
A female crab retrieved from the area was found to be carrying mature eggs and larvae.
"Our best guess is there was an event, or maybe more than one, where warmer water flushed up across the shelf and carried some of the larvae into the basin," said project leader Craig Smith from the University of Hawaii.
It is believed that this species cannot tolerate water colder than 1.4C.
The seas here get warmer as you descend; and the crabs were only found below 850m.
The researchers calculate that they have probably been there only for 30-40 years; before that, the water would have been too cold even at the bottom of the Palmer Deep.
They cannot as yet survive on the continental shelf, which is at a depth of about 500m; but that could change.
"If you look at the rate at which the seas are warming, (the continental shelf) should be above 1.4C within a couple of decades, so the crabs are likely then to come into shallower waters," Professor Smith told BBC News.
Predators
The upper limit of the crab-dwelling zone - 850m - also marks the line between abundant seabed life above and depleted life below.
"Above the crab zone, the abundance and diversity of plants and animals was high, with echinoderms including brittlestars, sea lilies and sea cucumbers," said Professor Smith.
"We found none of them in the crab zone itself, and when we went 50-100m above we found very few - so we think the crabs are venturing up into shallow waters to feed.
"We would expect (local) extinctions in some of these organisms."
These findings reinforce the belief of other scientists that king crabs will change the ecology of the Antarctic perimeter once they arrive - and that they would arrive at some point, washed from warmer waters along the South American coast, has long been expected.
With a legspan of up to a metre, the animals are generally top predators in the seafloor ecosystem.
The king (or stone) crabs are a group of about 120 species - and one member, the red king crab (Paralithodes camtschaticus) is already having an ecological impact in Norwegian waters following its slow spread from Russia.
However, in Northern latitudes they are also now important commercially, with Norwegian fishermen alone allocated a quota of thousands each year.
Fishing crabs for profit in this part of the Antarctic would not be permitted.
But fishing could in time be used as a means to control them, said Professor Smith, if their ecological impacts become too severe.
Links :
- NewScientist : Giant red crabs invade the Antarctic abyss (video)
Thursday, September 8, 2011
Scientists call for end to deep-sea fishing
Dr. Gregor Cailliet, Professor Emeritus at Moss Landing Marine Labs, has studied deep-sea fishes since the 1960s.
As a leader in the field of age and growth, he was among the first to discover that deep-sea fishes grow slower, live longer, and reproduce later, all of which make them highly vulnerable to fishing pressure.
Here Dr. Cailliet discusses the sensitivity of deep-sea fishes and why fisheries managers might consider proceeding with caution when initiating commercial exploitation.
As a leader in the field of age and growth, he was among the first to discover that deep-sea fishes grow slower, live longer, and reproduce later, all of which make them highly vulnerable to fishing pressure.
Here Dr. Cailliet discusses the sensitivity of deep-sea fishes and why fisheries managers might consider proceeding with caution when initiating commercial exploitation.
From WashingtonPost
Describing the open ocean as “more akin to a watery desert,” the scientists argue that vessels have targeted patches of productive areas sequentially, depleting the fish there and destroying deep-sea corals before moving on to new areas.
Certain deep-sea species have gained widespread popularity — including orange roughy and Patagonian toothfish, otherwise known as Chilean sea bass — only to crash within a matter of years.
Elliott Norse, president of the Marine Conservation Institute and the paper’s lead author, said the world has turned to deep-sea fishing “out of desperation” without realizing fish stocks there take much longer to recover.
“We’re now fishing in the worst places to fish,” Norse said in an interview. “These things don’t come back.”
As vessels use Global Positioning System devices and trawlers, which scrape massive metal plates across the sea bottom, the catch of deep-water species has increased sevenfold between 1960 and 2004, according to the U.N. Food and Agriculture Organization.
“What they’re doing out there is more like mining than fishing,” said Kevin Hassett, director of economic policy studies at the American Enterprise Institute.
The estimated mean depth of fishing has more than tripled since the 1950s, from 492 feet to 1,706 feet in 2004, according to Telmo Morato, a marine biologist with the department of oceanography and fisheries at the University of the Azores in Portugal and one of the paper’s authors.
Fishing subsidies help sustain this practice, according to Rashid Sumaila, the paper’s other author, who directs the University of British Columbia Fisheries Centre.
He said high-seas trawlers around the world receive roughly $162 million each year in government handouts, which amounts to a quarter of the value of the fleets’ catch.
Industrial fishing in the deep sea should be banned because it has depleted fish stocks that take longer to recover than other species, according to a paper to be released this week by an international team of marine scientists.
The article, published in the scientific journal Marine Policy, describes fishing operations that have in recent decades targeted the unregulated high seas after stocks near shore were overfished.
“That is what is keeping most of them in business,” Sumaila said.
Bottom-trawling can crush deep-sea corals, which can live for as long as 4,000 years, the scientists noted.
Some fish species of the deep live for more than a century, and while they can spawn many eggs, there can be several years in which juveniles fail to make it into adulthood.
Orange roughy, which Australia declared a threatened species in 2006, take 30 years to reach sexual maturity and live up to 149 years.
The leafscale gulper shark, one of several deep-water sharks targeted for its liver oil, “matures late, has only 5-8 pups per year and lives to be 70 years old,” the authors write.
Ray Hilborn, a University of Washington professor of aquatic and fisheries science, questioned the paper on the grounds that several long-lived species off the Pacific Coast, such as geoduck clams, have been harvested sustainably at very low levels.
In many cases, fishing operations take just 1 percent of the population, he said, and this keeps the stocks from collapsing.
“There’s no question [a ban] can be done,” Hilborn said in an interview, adding that the international regulatory regimes may not be up for the task.
“The question is, is it worth it?”
Hilborn said that while deep-sea corals might be sacrificed in the pursuit of fishing, humans had accepted similar trade-offs when clearing old-growth forests for farmland.
“Some of these habitats will probably be changed by fishing.
Some of those corals will be gone,” he said.
“From a conservation perspective, maybe we shouldn’t fish at all, and the ocean should be left pristine. Where is the food going to come from?”
But Daniel Pauly, a marine biologist at the University of British Columbia, said the costs of deep-sea fishing far outweigh the benefits.
“It’s a waste of resources, it’s a waste of biodiversity, it’s a waste of everything,” Pauly said. “In the end, there is nothing left.”
Maria Damanaki, the European Union’s commissioner for maritime affairs and fisheries, said in an interview that she would like to reduce fishing on the high seas and cut subsidies for deep-sea trawlers.
“I’ll try. I really agree there’s a danger there, so we have to be prudent,” said Damanaki, adding that nations such as France, Denmark, Portugal and Spain resist such efforts.
“We have to try to persuade them to stop this.”
Links :
- NOAA : U.S., European Union to strengthen cooperation to combat illegal fishing
- FIS : Fisheries commissioner: fight against illegal fishing brings concrete results
- McKinsey&Company : Design for sustainable fisheries—Modeling fishery economics
Wednesday, September 7, 2011
Extreme kayaker tackes circumnavigation of South America
Freya Hoffmeister : one woman, one kayak, one continentFrom ExplorerWeb
The German Freya Hoffmeister is well known for her long distance kayak adventurers. September 1st she left Buenos Aires on her next big undertaking.
She will try to circumnavigate South Africa on her own in a kayak.
The trip will cover more than 24.000 kilometers and last over 24 months.
Freya Hoffmeister has kayaked round continents and big islands before.
In 2007 she did a 33 days speed record for paddling around Iceland together with Greg Stamer.
Two years later she was up for a paddle that took tens times longer.
She did a solo circumnavigation of Australia in 332 days.
This time she is heading out for an even bigger adventure.
South America has it all when it comes to probable adventure stoppers along the way: Huge seas right on the nose round Cape Horn, horrendous winds in Patagonia and long distances where both the Atlantic and Pacific ocean gets to hammer her.
But the same areas also will give her the most fantastic experiences if she manages to hold it all together.
In a kayak you get as close to nature as you possibly can, and the intense feeling of handling the sometimes brute force of the ocean alone in some of the most remote parts of the world must be worth all the hardship.
The German kayaker has divided the expedition in to three stages in a clockwise direction.
The first will take her from Buenos Aires, Argentina to Valparaiso, Chile.
Then to Georgetown, Guyana, and she plans to finish her circumnavigation on her 50th birthday on May 19th in 2014.
By then she will have paddled 24.000 kilometers through 12 countries.
Besides her kayak adventures, Hoffmeister is a businesswoman, former Miss Germany beauty contestant, competitive gymnast, bodybuilder and sky-diver who lives in Husum, Germany.
Links :
- Freyas blog
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