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Series: Nature Great Events

 

The Great Feast

   2009    Nature
Every summer in the seas off Alaska humpback whales, sea lions and killer whales depend on an explosion of plant life, the plankton bloom. It transforms these seas into the richest on Earth. But will these animals survive to enjoy the great feast? The summer sun sparks the growth of phytoplankton, microscopic floating plants which can bloom in such vast numbers that they eclipse even the Amazon rainforest in sheer abundance of plant life. Remarkably, it is these minute plants that are the basis of all life here. But both whales and sea lions have obstacles to overcome before they can enjoy the feast. Humpback whales migrate 3,000 miles from Hawaii, and during their 3 month voyage lose a third of their body weight. In a heart-rending scene a mother sea lion loses her pup in a violent summer storm, while another dramatic sequence shows a group of killer whales working together to kill a huge male sea lion.
In late summer the plankton bloom is at its height. Vast shoals of herring gather to feed on it, diving birds round the fish up into a bait ball and then a humpback whale roars in to scoop up the entire ball of herring in one huge mouthful. When a dozen whales work together they employ the ultimate method of co-operative fishing - bubble net feeding. One whale blows a ring of bubbles to engulf the fish and then they charge in as one. Filmed from the surface, underwater and, for the first time, from the air, we reveal how these giant hunters can catch a tonne of fish every day.
Wild Russia
Wild Russia

   2009    Nature
Wild South America
Wild South America

   2005    Nature
How the Universe Works Season 6
How the Universe Works Season 6

   2018    Science
Tales by Light Season 2
Tales by Light Season 2

   2017    Nature
Galapagos with David Attenborough
Galapagos with David Attenborough

   2013    Nature
Out of the Cradle
Out of the Cradle

   2019    History
Triumph of Life
Triumph of Life

   2006    Nature
Through the Wormhole Season 7
Through the Wormhole Season 7

   2016    Culture