Friday, March 30, 2007

Will your house flood?



Most people are wondering how your property will fare in a world with higher sea-levels? Here's a tool that could help. Click Here! Once the site has loaded use your mouse to drag the map around and find the area you live in, the slider at on the left side zooms in and out, and at the top then choose between 1 metre to 14 metres of sea-level rise. However, I think who put this site together, just looked at altitude. Since, the shaded flooded areas that occur, when you select 3 m of sea-level rise, is simply land with an elevation of 3 m above current sea-level. I'm saying this because the shaded areas will not include areas that may be on higher ground but are nevertheless at greater risk of floods and storms. This site can take a while to load everything, so be patient! It very interesting.

Thursday, March 29, 2007

Taiwan discovers frozen natural gas

Taiwan has found off its coast huge deposits of frozen natural gas, known as the 'ice that burns' and billed as the energy source of the future, a newspaper said Saturday.A team of Taiwanese and Japanese researchers have succeeded in extracting samples of methane hydrate from the ocean floor off Taiwan's southwest coast and will publish their report in May, the Liberty Times reported.The team began its exploration two years ago, after US and Japanese scientists suspected methane hydrate deposits in the region through monitoring by satellite and scientific equipments.Relying on a deep-sea remote-controlled research ship, the team recently extracted crystallized methane hydrate from a depth of 1,100 metres and recorded how it began to melt at 500-metre depth and vaporize at 400-metre depth.Methane hydrate, in its original form, looks like whitish-yellow ice or ice cream. But at room temperature, it vaporizes and can be ignited, thus the name 'the ice that burns'.'One unit of methane hydrate contains 170 units of natural gas. So the ocean floor is like a gas cylinder holding compressed methane hydrate in crystal form,' Professor Yang Tsan-yao from the National Taiwan University and one of the team members was quoted as saying. The team estimates that Taiwan's southwest coast holds about 600 billion cubic metres of methane hydrate, enough to meet Taiwan's energy needs for 60 years.Several countries, including Japan, the US and Canada, have begun to explore methane hydrate - also called the 'greenhouse energy' - with Japan hoping to start commercial exploration in 2010.

Biggest, Smallest, Fastest, Deepest:Marine Animal Records

Whales and Dolphins

Largest Whale: Blue Whale, Balaenoptera musculusfemale: 33.27 meters (109 feet 3.5 inches) 190 tons estimated weightmale: 32.64 meters (107 feet 1 inch)Both captured near the South Shetland Islands in 1926

Largest Fin Whale, Balaenoptera physalus 90 feet, 97 tons estimated weight

Largest Sei Whale, Balaeonoptera borealis 72 feet, 45 tons estimated weight

Largest Sperm Whale, Physeter catodon 67 feet 10 inches, 72 tons estimated weight

Largest Humpback Whale, Megaptera novaeangliae 65 feet, 64 tons estimated weight

Largest Gray Whale, Eschrichtius robustus 51 feet, 39 tons

Fastest Swimming Baleen Whale (short distance)Sei Whale, Balaenoptera borealis: 35 miles per hour in short bursts

Fastest Swimming Dolphin:

Dall's porpoise, Phocoenoides dalli, recorded at 56 km/hr
Killer Whale, Orcinus orca , recorded at 56 km/hr
Common Dolphin, Delphinus delphis - 37 km/hr

Seals and Sea Lions

Largest Northern Elephant Seal, Mirounga angustirostris: 18 feet, taken in 1852 off Santa Barbara Island, 15 feet 7 inches taken in 1929 off San Diego

Largest Southern Elephant Seal, Mirounga leonina: 21 feet, 4 inches, taken near South Georgia Island in 1913

Smallest Pinniped: Baikal Seal, Pusa sibiricaAdults are 4 feet 6 inches and 140 pounds

Fastest Swimming Pinniped: California Sea Lion, Zalophus californianus 25 miles per hour

Greatest Age for a Pinniped:Ringed Seal, Phoca hispida: 43 years, collected on Baffin Island and based on growth layers in the teethGrey Seal, Halichoerus grypus, 41-42 years, kept in captivity in Sweden from 1901-1942

Fish

Largest Fish Whale Shark, Rhinodon typus 59 feet, for a specimen captured in Thailand in 1919

Largest Basking Shark, Cetorhinus maximus 45 feet. Weight estimated at 32,000 pounds

Largest Tiger Shark, Galeocerdo cuvieri 20 feet, 10 inches, 2070 pounds

Largest Hammerhead Shark, Sphyrna mokarran 18 feet, 4 inches, 1,860 pounds

Largest Thresher Shark, Alopias vulpinus 18 feet, 1,100 pounds

Largest Six-gill Shark, Hexanchus griseus 15 feet, 1,300 pounds

Heaviest Fish in the Class Ostyichtheys (bony fish)Ocean Sunfish, Mola mola: 10 feet in length, 14 feet between dorsal and anal fins, 4,928 pounds, struck and killed by a ship off Australia in 1908

Longest Fish in the Class Ostyichtheys (bony fish)Russian Sturgeon, Acipenser huso: 24 feet in length, weight 1,470 kg (3,250 pounds) caught in the Volga river in 1827

Shortest Marine FishSchindleria praematurus, found in Samoa in the South Pacific: 12-19 mm in length, weight 2 mg.

Fastest Fish:

Sailfish, Istiophorus platypterus: 68.18 mph
Mako Shark, Isurus oxyrinchus: 60 mph
Marlin, Tetrapturus sp. 50 mph
Wahoo, Acanthocybium solandri 48.5 mph
Bluefin Tuna, Thunnus thynnus 43.4 mph
Blue Shark, Prionace glauca 43 mph
Bonefish, Albula vulpes 40 mph
Swordfish, Xiphius gladius 40 mph

Slowest Fish:Sea Horse 0.01 mph

Echinoderms

Largest Sea Star: Evasterias echinosomo 96 cm (37.79 inches) in diameter, weight 5 kg (11 pounds), collected in the North Pacific

Smallest Sea Star: Leptychaster propinquus 1.83 cm (0.72 inches) total diameter

Deepest Sea Star: Eremicaster tenebrariusCollected in 7,630 meters (25,032 feet)

Fastest Sea Star: Sun Star, Pycnopodia helianthoides 75 cm per minute (0.027 miles per hour)

Largest Sea Urchin: Sperosoma giganteumTest diameter of 38 cm (13 inches)

Smallest Sea Urchin: Echinocyamus scaberTest diameter of 5.5 mm (0.21 inches)

Deepest Sea Urchin: Unidentified specimentaken from 7,250 meters (23,786 feet) near Indonesia in 1951

Largest Sea Cucumber: Members of the genus Stichopus have been measured up to 1.3 meters (40 inches) in length and 20 cm (8 inches) in diameter

Smallest Sea Cucumber: Rhabdomolgus ruber, found in the North Sea10 mm (0.39 inches) in length

Deepest Sea Cucumber: Unidentified specimen taken from the Philippine trench in 1951 in 10,190 meters (33,431 feet)

Largest Crinoid: Helimoetra glacialis, found in the Northeast Pacific90 cm (36 inches) in diameter

Smallest Crinoid: Unidentified species with a diameter of 3 cm (1.18 inches)

Deepest Crinoid: Unidentified specimen taken from the Kermadec Trench in 1951 in 8,210 meters (26,935 feet)

Crustaceans

Largest Crustacean: Giant spider crab Macrocheira kaempferiIndividuals can measure 12-14 inches across the body, with a claw span of 8-9 feet. There is a report of a crab weighing 14 pounds with a claw span of 12 feet.

Smallest Crab: Pea crabs in the family Pinnotheridae are about .25 inches across the shell

Heaviest Crustacean: Atlantic Lobster The record, however goes to a lobster weighing 44 pounds, 4 ounces, which was caught in Nova Scotia waters.

Molluscs

Heaviest Mollusc (and heaviest invertebrate): The giant squid (Architeuthis sp.)The largest giant squid ever recorded (Architeuthis princeps) was captured in 1878. One of the "arms" (probably a tentacle) measured 35 feet long. It is estimated that the animal weighed in the neighbourhood of 4000 pounds.

Largest Clams: Tridacna gigas, with a length of 137cm, as reported by Rosewater, J. 1965. The family Tridacnidae in the Indo-Pacific. Indo-Pacific Mollusca 1: 347-396. Tridacna derasa, found on coral reefs in the South Pacific. One was collected on the Great Barrier Reef in 1917 that measured 49 inches by 29 inches, and weighed 579.5 pounds.

Largest Gastropod: Syrinx aruanus, the trumpet or baler conch found off the coast of Australia. In 1979, a 40 pound animal was found with a shell that measured 30.4 inches in length and 39.75 inches in girth.

Cnidarians

Largest Jellyfish: Cyanea arctica, found in the North AtlanticSpecimens have been measured up to 7 feet 6 inches across the bell with a tentacle of 120 feet.

Porifera

Largest Sponge: Xestospongia muta, the barrel sponge, found in tropical coastal waters. Some individuals in the Caribbean measure 6-8 feet tall, and 6-8 feet across. It should be noted, however, that some species of encrusting sponge can cover a very large area.

Seaweed

Largest Seaweed: Macrocystis pyrifera, a brown algae called the giant kelp. The longest recorded length is 54 metres long! M. pyrifera is the type of kelp that makes up the majority of the giant kelp forests off the California coast.

Wednesday, March 28, 2007

Disaster as Thousands of Harp Seals 'Assumed' Dead Over Lack of Ice Floes; '100% Pup Mortality'

Charlottetown, Canada (Mar 27, 2007 17:33 EST) Thousands of harp seal pups are assumed dead in Canada's Gulf of St. Lawrence due to the lack of ice floes, which mother seals require to give birth and nurse their pups successfully. Experts with IFAW (International Fund for Animal Welfare - www.ifaw.org) have been carrying out daily surveillance flights over the region. They report that the Gulf of St. Lawrence, which is the annual birthing ground of hundreds of thousands of harp seals, is essentially devoid of both ice and seals.
"The conditions this year are disastrous. I've surveyed this region for six years and I haven't seen anything like this" said Sheryl Fink, a senior researcher with IFAW. "There is wide open water and almost no seals. I only saw a handful of adult harp seals and even fewer pups, where normally we should be seeing thousands and thousands of seals."
The ice conditions this year are among the worst on record. Scientists have recorded below average ice conditions in the Gulf of St. Lawrence and off Newfoundland for the past nine out of 11 years. In 2002, 75% of harp seal pups born in the Gulf died due to lack of ice before the hunt even began. This year, the ice conditions appear to be even worse than in 2002 and scientists with IFAW are concerned that pup mortality will be extremely high.
"It's highly likely that this year we could have close to 100% pup mortality in the Gulf of St. Lawrence due to the poor ice conditions caused by rising temperatures," said Dr. David Lavigne, IFAW's science advisor, who recently co-authored a report on the impacts of global warming on harp seals.
Experts with Canada's Department of Fisheries and Oceans (DFO), which monitors the harp seal population and sets targets for annual commercial seal hunt in Canada, have also acknowledged the increase in seal pup mortality this year. It is cited as one reason why the Canadian government has yet to announce the total allowable catch (TAC) or official start date of the this year's hunt, which is due to begin any day.
"It would be reckless for the government to allow the hunt to proceed this year, given the high pup mortality that has apparently occurred," said Fink. "We may not be able to save these seals from the effects of global warming, but the Canadian government can save the survivors from being hunted. I can only hope that they will do the right thing and cancel the hunt."
The Canadian government has permitted nearly one million seals to be killed in the past three years. The government quotas have continually exceeded the number of seals that can be safely removed without causing the population to decline. Last year, the TAC was set at 335,000 seals (far above the estimated sustainable level of 250,000) and the total number of seals reported killed was over 354,000 - exceeding the legal limit by 19,000 animals. Of the 354,000 seals killed last year, 98% were under three months of age.

Tuesday, March 27, 2007

Somalia: Pirates Rule the World's Most Dangerous Waters




Fred OluochNairobi
The hijacking of MV Rozen by pirates off the coast of Somalia is the latest in a series of hijackings that have been going on for years since Somalia became stateless in 1991.
The ship was on its way to Kenya after offloading 1,800 tonnes of maize, rice and vegetables, when pirates stuck at Ras Shuful off the Somali coast.
The crew of six Kenyans and six Sri Lankans had delivered cargo to different ports on behalf of the World Food Programme.
Though the Somalia Transitional Federal Government (TFG) is struggling to restore civil authority in Somalia, pirates continue to operate off the Somalia coast with impunity. Cases of piracy on the coast increased sharply in 2005, when a total of 48 vessels were attacked and 35 detained with crew and cargo.
Indeed, Somali waters are currently the most dangerous in the world, forcing some shippers to withdraw their operations from the region, while the few that continue plying the route do so at a high risk.
Yet, the route remains important for the region and the global sea trade. Piracy in the area is also encouraged by illegal fishing, which is extremely lucrative given that there is no government in place to monitor deep-sea fishing.
In March last year, a suspected pirate was killed when a group tried to attack a US navy ship off the coast of Somalia.
Various attempts by countries in the region to come up with anti-piracy measures have done little to stamp out the menace in Somali waters.
For example, 10 Somali pirates were last November jailed for seven years each after a trial in Kenya.
In February last year, various countries from the region and observers from the UK, the US, Australia, Bangladesh, Sri Lanka and India, converged on Mombasa to brainstorm on how to curb piracy and armed raids on ships in the Somali waters.
However, a full-fledged monitoring programme was found to be too costly for the struggling economies of the region.
Again, an attempt by the TFG to contract a private security firm to combat persistent insecurity along Somalia's 2,000 km coastline was met with controversy when critics argued that Top Cat marine Security of the US, did not have the capacity to carry out such an operation. TFG had signed a $55 million agreement with Top Cat to tackle piracy in the Horn of Africa.

Thursday, March 22, 2007

Cod Aquaculture: The Next Step in the “Blue Revolution”



Introduced in the late 1960s and early 1970s, salmon aquaculture today produces greater tonnages of salmon a year than wild catches. Just go to the grocery store and you’ll find farm-raised salmon for about $5 per poound (on sale) while wild salmon hovers near $10-14 (at least in my area, this may be significantly different if you live near major fish ports). Though some folks claim that there’s a significant difference between the two types of salmon, it’s just likely to be positive attribution error, or simply that wild-caught salmon is more carefully prepared. Either way, many consumers, including myself, find the farm-raised salmon to be an excellent way to add salmon to their diets.

Critics of the methods of industrialized salmon farming have been many and varied. Among the criticisms leveled against it are that it spawns algal blooms due to the nitrogen content in the concentrated fish waste, that it leads to interbreeding between farmed and wild stocks–thus reducing the genetic variability of wild stocks and increasing their susceptibility to mass disease–, and that it destroys crucial shallow estuarine ecosystems by virtue of the fact that farming salmon is easiest near shore. These criticisms have paradoxically led to either one of two decisions if you are eco-conscious: 1) eat much less fish that is wild-caught from only the most carefully managed fish stocks ($$$$), or 2) don’t eat fish. For those of us without the $$$$ and that like fish, we are stuck with a poorly-regulated, dirty, destructive source of this occasional delicacy.

Like most frustrating aspects of environmental protection, aquaculture is not going to disappear, in fact given the reasons I discussed above it is likely only to intensify. In an excellent and lengthy article in today’s NYTimes Magazine, Paul Greenberg discusses what may take aquaculture from big niche industry to big business: Cod Farming. Once thought so abundant that no amount of fishing could decrease their yields, Cod fueled the growth and prosperity of colonial America, and much of the shipping and fishing fleets of Atlantic Europe. But of course, “they” were wrong and Cod stocks plummeted to un-fishable levels in the 1980s and 1990s. Cod farming may help to change all that by reducing pressure on the wild stocks and by helping to re-energize recently destitute stretches of northern coastlines.

But farming Cod is a tricky business–far trickier than salmon. To reach profitability, farmers have had to overcome a host of obstacles including cannibalization, premature sexual maturity, and low survival rates that plagued early efforts. The article describes these obstacles and how they may be overcome. The bottom line is that large-scale commercial cod farming may become a reality in the next decade. And, of course, cod is just the first foray into farming the bulk of ocean fish species. Tuna, swordfish, and host of others are next.

Realty projects threaten reefs

Experts collect data on growth of coral reefs in Mina Al Fahal area off Oman.



Realty projects threaten reefs
By Sunil K. Vaidya, Bureau Chief
Muscat: Rich coral colonies in Oman's waters need close monitoring to protect them from threats that is posed by various elements, including development projects that are sprouting like mushrooms.
Oman is rapidly becoming an important destination for global tourists, especially the diving aficionados, who get drawn to this country's virgin beaches, pristine blue sea water and rich coral colonies, which can be very important habitats for fish and some of the other marine life.
The rising inflow of tourists is good for the country's economy as development is also rapidly increasing, but the flip side is that it also poses threat to marine life along Oman's 1,700 km coast.
"In the Gulf of Oman some of the best coral is found around Muscat, the Damaniyat Islands and in Musandam. Unfortunately corals here and around the world are suffering from various impacts," Dr Barry Jupp, a senior Marine Scientist with the Ministry of Regional Municipality, Environment and Water Resources, told Gulf News yesterday. "With rapid development of tourism there will be increasing impacts on reefs."
Development projects
In fact, marine scientists around the world are predicting that over 50 per cent of the coral reefs in the world may be destroyed by 2030.
Oman has witnessed major projects along the beaches in Muscat and a couple of more are coming up fast. "Sedimentation from coastal construction is one of the major threats to corals in Omani waters," Dr Jupp reckons.
Talking about the human impact on corals, Dr Jupp said: "Fishing activities, especially from abandoned nets, traps and anchor damage, pose a big threat to corals in Omani waters." He said that the marine environment department in Oman was making every effort to educate fishermen about the danger their activities could pose to corals.
"Litter and pollution such as oil spills from passing tankers also pose threat to this nature's wonder," felt the marine scientist, who is working hard to ensure that the corals in the Omani waters are protected. Interestingly, according to an estimate 16-17 million barrels of oil cross Musandam every day.
Of course, he pointed out, natural impacts such as up welling-related effects of low temperature and high nutrient levels, fluctuating temperatures, predation by the Crown-of-Thorns Starfish, storm damage, diseases, and "coral bleaching", also pose threat to corals in Omani waters.
Dr Jupp said: "Coral can be sensitive to environmental changes. A coral reef can easily be swamped in algae if there are too many nutrients in the water. Coral will also die if the water temperature changes by more than a degree or two beyond its normal range or if the salinity of the water drops."
Important habitat
Coral reefs are important habitats for fish, lobsters and cuttlefish, and are increasingly important for diving tourists in Oman, said Dr Jupp.
Taking personal interest in monitoring of coral growth as well as threat posed by various elements, Dr Jupp had placed modern data collection gadgets five metres under water in Mina Al Fahal area to monitor various impacts on corals but were stolen.
"In spite of the theft we have managed to log important data about light and temperature impact on corals," he revealed.
Talking about the development projects that have or are coming up along Oman's coastal areas, Dr Jupp said that there was a system in place to monitor this. "For every project the developer has to acquire Environment Impact Assessment (EIA) certificate," he said. However, the marine scientist added that EIA was a primary assessment of the impact that activities like dredging, reclamation etc could have on the marine life.
"Still threat persist," he reiterated, adding that Oman was not bad as quite a lot of regulations were in place and Ministry of Regional Municipality, Environment and Water Resources strictly monitors the adverse impact of any activities on marine life in the area.