Headline Tag: Science Rating: Amazing Hits: 55 Comments: 0 The Blue Planet: Coasts The Blue Planet: Coasts Broadcast 31 October 2001 and 48:16. The final programme examines the world's coastal environments, "the most dynamic of all ocean habitats". The perils of living in such places are highlighted by Marine Iguanas on the Galápagos Islands, whose diet of seaweed is quickly grabbed between crashing breakers. Many shores provide sites in which to breed or lay eggs. Apart from birds, turtles are among other major species to do so, and the mass emergence of flatbacks on Crab Island in Australia is reduced by predatory herons, pelicans and other hunters. Each year, four million seabirds, comprising fourteen species, return to the island of Talan in eastern Russia to nest. By ensuring that all their chicks eventually leave at the same time, they lessen the impact of predators. The rough seas of the Southern Ocean play host to penguins, and a group of them is shown being pursued by an aggressive bull sea lion. The planet's coldest seas are in Antarctica, and on South Georgia each spring, thousands of Southern elephant seals arrive to breed. A pair of males is shown fighting a bloody battle to control a harem of females. In Patagonia, the social nature of sea lions is shown as they establish colonies, each of them several hundred strong. While in some respects it is an ideal location for the growing young, high tide brings danger for the colony as a pod of orcas habitually goes on the attack. Having snatched a victim, the predator returns to the open ocean to 'play' with it. User: spam_vigilante Jul 26, 2008 4:08 AM






















Headline Tag: Science Rating: Amazing Hits: 261 Comments: 0 The Blue Planet: Open Ocean The Blue Planet: Open Ocean Broadcast 26 September 2001, the third instalment focuses on life in the "marine deserts": seas that are furthest from land. Narrated by Sir David Attenborough and RT 48:07. Such waters contain the swiftest and most powerful of ocean hunters. A feeding frenzy is shown, as striped marlin, tuna and a Sei whale pick off a shoal of sardines until all within it have been consumed. Manta rays also gather to eat the eggs of spawning surgeonfish. Accumulations of plankton correspond to ocean 'boundaries' and consequently, schools of fish seek them out. This in turn attracts predators, and a sailfish is filmed on the attack. The only escape for smaller fish is to put as much distance between them and their pursuers as possible. Bluefin tuna are able to heat their bodies and so can hunt in colder conditions than the others of their species. Off the coast of New Zealand, an undersea volcano has formed an island and the nearby currents sweep many kinds of creatures to it, again creating huge feeding grounds. Another Pacific seamount is surrounded by hammerhead sharks, but not to seek food: they are there to allow other fish to clean them of parasites. However, others that are on the lookout for prey arrive in vast numbers. A large pod of common dolphins is too big to feed all at once and so splits up into smaller expeditions. One of these ends up near the Azores with a shoal of mackerel in its sights, but they have to compete for their quarry with an attendant flock of shearwaters and a group of adult yellowfin tuna. User: spam_vigilante Jul 24, 2008 10:39 PM


 
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