A Travellerspoint blog

Antarctica

Voyage to Antarctica: Seabirds of the Drake Passage

Observations and reflections on the plight of seabirds...............................Ramdas Iyer

26 °F

large_011.jpg
DSC_0839.jpg_DSC6828.jpg

My travel stories are normally laced with adventure in very historic places. But somehow the story of the sea birds of the Southern oceans is very compelling. My real adventure to Antarctica involved crossing the violent 500 mile Drake Passage for 2 days until reaching the cooler waters of Antarctica. My article here has to do with the seabirds of the Antarctic convergence.
” The convergence is a geological feature. It is a curve continuously encircling Antarctica where cold, northward-flowing Antarctic waters meet the relatively warmer waters of the subantarctic. Antarctic waters predominantly sink beneath subantarctic waters, while associated zones of mixing and upwelling create a zone very high turbulence causing frequent storms and high seas .The oceans south of the sub-tropical convergence is highly productive on account of the strongly developed water currents and the associated upwelling of the nutrient rich sub-surface water. This leads to the multiplication of the zooplankton and krill which sustains a wide variety of marine animals’ especially pelagic sea birds.” says K.J. Matthew, Scientist, Indian Antarctic expedition of 1986.

large__DSC6840.jpg
large__DSC7249.jpg
large__DSC1067-1.jpg
The Drake crossing if choppy or stormy completely confines one to the insides of the vessel. But we were fortunate to have a good crossing onwards aboard the sleek former research vessel Akademik Sergei Vavilov .Armed with my cameras I was scouting the decks for presence of marine mammals alongside my good friend Lee Slabber, winner of National Geographic Wild Life photographer of the year 2011.About 200 miles south of the South American continent we started observing seabirds. Our normal fascination for birds is a result of beautiful plumages, patterns, singing ability and the like. But here in the Southern ocean my fascination for these birds was a result of their size, majesty and their survival story in a harsh clime where they cover large distances for food and survival.

We started observing different species of albatrosses and petrels swooping around the ship. It was much akin to standing near the run way of a busy airport. They came at a steady pace, at a steady path gently gliding past the deck before making another pass after a few minutes. This process involved at least 10 to 12 different species of petrels, shearwaters and albatrosses. After passing the ship the more elegant albatrosses swam over the surface of the choppy water feeling the water with one tip of the wing and adjusting to the undulations of the waves. It was mystical. We saw the great Wanderer albatross reaching wing spans of over 12feet, Royal albatrosses with fine white feathers, the sooty albatross with a beautiful smoked feather pattern over its face and the large black browed albatrosses (see pictures)

_DSC7596.jpg_DSC1124.jpg
_DSC8165.jpg_DSC7296.jpg

They were followed by Giant Southern petrels and Antarctic Petrels. They were so close to us yet hard to photograph given my slow speed lenses and the speed of their flight. They flew with such purpose for hours at a time keeping me transfixed on the deck despite the cold and moisture.

Albatrosses are miracles of nature’s engineering – their long, narrow wings enable them to glide for thousands of miles on wind currents without flapping their wings. Simply by angling their wings and their flight path, albatrosses can use the variation in air speed and direction near the waves to soar over the oceans. This phenomenon is called dynamic soaring. This soaring is incredibly efficient, requiring less energy than sitting on a nest. Albatrosses are the great ocean wanderers, often flying thousands of kilometers on a single trip to feed their chick. The wandering albatross flies up to 10,000 kilometers (6,250 miles) to find food for its chick. So the photograph on my blog could be of one such bird flying to feed her chick! A grey-headed albatross from South Georgia has been recorded circumnavigating the globe in a mere 46 days! Since they depend on wind to fly efficiently the equatorial doldrums acts as a barrier. During my research and reading for this article I came across a spectacular photographer who had attached a camera on an albatross to see its feeding habits. This picture shown below shows the wandering albatross following a killer whale with the hope of picking up scraps of meat from a dolphin or seal.

If you observe the picture of my Giant Southern petrel, you will see twin tubes above the beak.Seabirds have two small salt glands that are 10 times more efficient at removing salt than the birds’ kidneys. These glands are positioned in a small groove above their eyes. Blood carries the salt through the salt glands, where it’s excreted in a saline-loaded solution that drains into the bird’s nasal cavities. This salt solution typically drips from the bird’s nostrils to the end of its bill. You may also see salt water dripping from most of the bird pictures.

large_alb_and_killer-001.jpg

Albatrosses and petrels have long life spans with some individuals known to live for more than 60 years. They have low rates of natural mortality and low rates of mortality among their offspring. While some species breed annually, others breed only every second or third year. A young bird that leaves its nest only comes back to the same site 7 years later to mate. During that time it is always flying except for brief and occasional stops on the water. While albatrosses and petrels can withstand the demands of the harsh Antarctic and sub-Antarctic environments, they are facing numerous human-induced threats that are putting their long-term survival at risk. These threats include pollution, hunting and poaching for eggs, meat and feathers, habitat destruction, introduction of non-native predators and longline fishing methods. These threats are putting some species of the birds at risk for extinction

large__DSC8020.jpg
large__DSC7995-001.jpg

Long line fishing is the biggest human induced threat facing albatrosses and petrels. Longline fishing is a popular method of fishing that is used in the Southern Ocean to obtain high quantities of bluefin tuna, ling, snapper, hoki and Patagonian toothfish. The way that long lining works is that fishermen set out a single line up to 130 km long behind their boat and attaches to the line thousands of baited hooks. Once the loglines are sunk they do not affect the birds but while floating behind the boats albatrosses and petrels try and take the bait but may end up swallowing the hook and then drowning. According to Bird Life International more than 300,000 seabirds are killed by longline fishing every year, including 100,000 albatrosses. 17 species of albatrosses that are already endangered are now threatened by extinction due to the significant number of deaths brought about by longline fishing. Every time we eat Chilean Bass it is nothing but Patagonian toothfish harvested from the subantarctic waters.
However, this threat can be greatly minimized by modifying fishing practice and adopting seabird by-catch mitigation measures. These include the use of bird-scaring lines and streamers, weighted lines to reduce the amount of time baits are available to birds, setting lines at night, setting lines beneath the waters' surface, and seasonal closures of fisheries to avoid fishing when birds are more susceptible to being caught, such as around nesting colonies during the breeding season. Adoption of these measures has now virtually eliminated seabird by-catch in some fisheries.

large__DSC1131.jpg
large__DSC1133.jpg
large_DSC_0399.jpg
Sam Thalmann of the Tasmanian Wildlife Division, a 20 year subantarctic bird conservationist, and one of our expedition leaders lectured us on the plight of these birds through slides and unbelievable photographs. He was especially concerned about the introduction of feral cats in the South Georgia Islands, the last untouched paradise on earth where the albatrosses and other seabirds breed. Jamie watts formerly of the British Antarctic Survey who was stranded in the South Georgia islands during the Falkland wars gave us great wild life stories but often with the bad news of impending population collapse.
large__DSC81651.jpg
_DSC7809.jpg_DSC7633.jpg
_DSC7305.jpg_DSC7809.jpg
large__DSC1023.jpg

As we approached the coast of Antarctic peninsula we saw less of the sea birds and instead saw porpoising penguins in open waters, another story of beauty and hardship. We saw plenty of terns, shearwaters, prions and Skuas. These birds are mostly land based and only use the waters for prey. On our return from Antarctica the weather had turned sour with nasty winds and huge waves. The birds were nowhere to be seen. I am fortunate to have witnessed some of the finest flying specimens on earth and hope my pictures will convey the rest of my thought. The End

Emailme at ( riyerr@aol.com)

Wildlife List – R/V Akademik Sergey Vavilov
Antarctic Explorer December 04 - 14, 2011
X marks number of sitings

Penguins
Gentoo Penguin Pygoscelis papua x x x x x
Adélie Penguin Pygoscelis adeliae x x
Chinstrap Penguin Pygoscelis antarctica x x x x
Magellanic Penguin Spheniscus magellanicus x
Albatrosses
Wandering Albatross Diomedea exulans x x
Northern Royal Albatross Diomedea sanfordi x x
Black-browed Albatross Diomedea melanophris x x x x x
Grey-headed Albatross Diomedea chrysostoma x x x
Light-mantled Sooty Albatross Phoebetria palpebrata x x
Petrels
Northern Giant Petrel Macronectes halli x x x
Southern Giant Petrel Macronectes giganteus x x x x x x x
Southern Fulmar Fulmarus glacialoides x x x x x x x x
Cape Petrel Daption capense x x x x x x x x x
Antarctic Petrel Thalassoica antarctica x x x
Antarctic Prion Pachyptila desolata x
Blue Petrel Haplobaena caerulea x x
Sooty Shearwater Puffinus griseus x
Storm Petrels
Wilson’s Storm-Petrel Oceanites oceanicus x x x x x x x x x
Black-bellied Storm-Petrel Fregetta tropica x
Skuas
South Polar Skua Catharacta maccormicki x
Brown Skua Catharacta antarctica x x x x x x
Chilean Skua Catharacta chilensis x
Shags
Antarctic Shag Phalacrocorax bransfieldensis x x x x x
Rock Shag Phalacrocorax magellanicus x
Gulls and Terns
Dolphin Gull Larus scoresbii x
Kelp Gull Larus dominicanus x x x x x x
Antarctic Tern Sterna vittata x x x x x
South American Tern Sterna hirundinacea x
Sheathbills
Pale-faced Sheathbill Chionis alba x x x x x x
BIRDS
MAMMALS
Seals
Crabeater Seal Lobodon carcinophagus x x x x
Weddell Seal Leptonychotes weddellii x x x x
Leopard Seal Hydrurga leptonyx x x x x
Elephant Seal Mirounga leonina x
Baleen Whales - Rorquals
Humpback Whale Megaptera novaeangliae x x x x
Antarctic Minke Whale Balaeonptera bonaerensis x x x
Dolphins
Orca Orcinus orca x
Peale's Dolphin Lagenorhynchus australis

large_DSC_0860.jpg

Posted by Ramdas Iyer 13:01 Archived in Antarctica Tagged passage drake antarctica albatros petrels Comments (1)

Deception Island, Antarctic peninsula: A State of Mind

Sailing inside an active volcanic caldera in Antarctica................Ramdas Iyer

snow 31 °F

large_DSC_0112.jpg
I have come a long way
to a distant place far far away
from where i used to live
and from what i used to do

Deception Island...
it’s just a state of mind,
i tell myself
hoping to erase these thoughts
of fear that hinges on the edge of my happiness

Adapted from Praveen ( Poetry of Life.com)

]_DSC0816.jpg
Deception-Island-Map.jpg

Exhausted by an exhilarating and action packed 12 days of sailing and exploring the Antarctic Peninsula we were mentally preparing for our return to South America through the rough seas of the Drake Passage. Our expedition leader…. had one more surprise. An announcement made on the PA system of our sleek Finnish built Russian Arctic explorer Akademik Sergei Vavilov called everyone to the various decks to see the walls of rock rise on both sides of our vessel through sea mist. It was a surreal moment. We were sailing into the active volcano, Deception Island

DSC_0127.jpgDSC_0120.jpg

Deception Island (62°57'S, 60°38'W) is one of the most incredible islands on the planet. Deception Island has fire and ice in its history, and in the present day. Mountainous, half covered by glaciers and mostly covered with black volcanic ash, Deception is an active volcano. The island is a “submerged caldera,” a circle of craggy hills around an almost-enclosed seawater lagoon its horseshoe shape formed when a volcanic eruption 10,000 years ago that blew off the top of the mountain and allowed seawater to flood the center, or caldera.
This volcano is quiet, but not dead. The island is classified as a “restless caldera with significant volcanic risk,” that could erupt at any time. Eruptions in 1968 and 1970 forced a British scientific research station to close, sending mud and ash through it and the nearby abandoned whaling station. Geologists continuously monitor the island for seismic activity.
large_DSC_0128.jpg
large_DSC_0139.jpg
Deception Island is now managed as part of the Antarctic treaty, making it a protected area with restricted human visits and impacts. But its history also records some of the human over-use of the Antarctic. Human activity there began in about 1820, with sealing. But in the early 1900s, when seals were nearly hunted to extinction, Antarctic seafarers turned to whaling.
A little whaling history is essential to understand Deception Island. With the advent of Industrial revolution in Europe in the 18th century, need for lighting, to increase the working hours of people who woke up at dawn and retired at sunset, changed. It was first seal oil and later whale oil that was the energizer of the industrial revolution. Animal fat from pigs lubricated the machinery while wholesale slaughter of seals and whales provided candle and oil lighting. Norwegians were the pioneers of European sealing as they had access to the riches of the Arctic Ocean. Ironically what made them rich in the 18th century has sustained their wealth through North Sea oil in the 20th century. Good karma I suppose.
large_DSC_0158.jpg
large_DSC_0162.jpg
The rise of Industrial America increased whaling in the Atlantic waters further diminishing supplies to the growing economies. In 1906, Norwegian whaling magnate Christen Christensen sent the first factory ship to the South Shetlands of the Atlantic Peninsula. These islands were discovered by sailors who were blown off course while trying to navigate Cape Horn in 1821.Soon other shore stations had been set up, including one at Deception Island. By 1912, there were six shore stations, 21 factory ships, and 62 catchers in Antarctica. That year 10,760 whales were killed. In 1926, a new kind of factory ship entered Antarctic waters, one equipped with a chute for hauling whole whales on board. With this, Antarctic whaling entered a new phase.

DSC_0143.jpgDSC_0145.jpg
DSC_0149.jpgDSC_0147.jpg
Around 1500 barrels of oil was obtained from killing 155 Right whales according to the records of a Whaler. It is estimated that 200000 Humpbacks were killed in the early 20th century, not to mention the Sperm, Beluga, Grey and Right whales. Nonetheless, during the 1937-1938 season, over 46,000 whales were killed, 9000 of them immature.
Thankfully the discovery of petroleum in the 1859’s and the mass usage of Kerosene which was 5 times cheaper , which did not turn rancid and was less smellier quickly turned the table on whale oil consumption. By the early 1900’s the price of whale oil dropped and by 1938 the industry was deemed unviable, (read “How the oil Industry saved the Whales” http://www.sjvgeology.org/history/whales.html).

large__DSC0845.jpg
Entering the volcanic caldera, a live one, was in itself a great adventure. We could see ice, snow and volcanic ash laden mountains all around us. Beautiful black sand beaches awaited our Zodiac boat landing. While in the other parts of Antarctica we were awed by nature here we were shocked by the extent of human occupation and damage done to a pristine environment. Upon landing we were free to walk about anywhere. As an engineer I was curious to see the riveted storage tanks, the huge boilers that melted the blubber and an abandoned machine shop. At every corner there was a penguin peering at me curiously. Due to its interesting temperature gradient -11C to plus 13 C, it has the largest chinstrap penguin rookery in the area with a population of 65000. (Protected and not approachable)
On my walk along the beach I enjoyed seeing Kestrels lapping in the waves, Giant Skua
birds roosting on their eggs and fur seals in the distance. There was an old airplane hanger where in 1935, Lincoln Ellsworth assembled his aircraft the Polar Star here prior to his pioneering trans-Antarctic flight from Dundee Island, nearby. Deception Island was also the base of an early Aerial Survey Expedition (1955-57).

DSC_0156.jpgDSC_0155.jpg
DSC_0167.jpg_DSC0844.jpg
Stories of men ill equipped to handle the cold suffering from depression and insanity is rampant. Especially to see the graves of some of the Norwegians from a distant land was spooky. The ruins of this station are the most complete remains of whaling history in the Antarctic, and governments have agreed to let the remains stand, undisturbed, to be seen and understood as part of maritime history—and as a witness to the power of volcanic activity. A visit here leaves an equally powerful impression, and Deception Island is the most-visited site in the Antarctic. There is a restriction on the numbers of people allowed to visit, and each ship must plan visits in advance, to lessen their impact on the island and its life
DSC_0162.jpg_DSC0853.jpg
_DSC0812.jpgDSC_0173.jpg
Prior to embarking on our vessel we were given the opportunity to skinny dip in polar waters. Depending on the currents, the geo-thermal waters make it possible to take a quick dip there. We were lucky to have one such day and my pictures will highlight the event.
We said good-bye to Antarctica and alas hit the roughest seas I have ever encountered. While the hull was racked by 50 foot waves half of the 90 passengers disappeared to their cabins dealing with their own waves of nausea. I was one of those lucky ones to experience the notoriety of the Drake Passage. Deception Island is a great story and a great place.
The End.
Emailme at ( riyerr@aol.com)

large_DSC_0270.jpg
large_DSC_0273.jpg

Posted by Ramdas Iyer 17:16 Archived in Antarctica Tagged beach volcanoes black penguins antarctica whaling sealing skua Comments (4)

(Entries 1 - 2 of 2) Page [1]