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Salmon: Running the Gauntlet

Season 29 Episode 12 | 53m 19s

The parallel stories of collapsing Pacific salmon populations and how biologists and engineers have become instruments in audacious experiments to replicate every stage of the fish's life cycle. Our once great runs of salmon are now conceived in laboratories, raised in tanks, driven in trucks, and farmed in pens. Here we go beyond the ongoing debate over how to save an endangered species.

Aired: 04/29/11 | Expires: 07/25/18
Major support for NATURE is provided by The Arnhold Family in memory of Henry and Clarisse Arnhold, Sue and Edgar Wachenheim III, The Fairweather Foundation, Charles Rosenblum, Kathy Chiao and Ken Hao, Sarah and Sandra Lyu in memory of Seung and Dorothy Lyu, The Lillian Goldman Charitable Trust, Dr. George Stanley and Sandra Caruso, Colin S. Edwards, Kate W. Cassidy Foundation, Filomen M. D’Agostino Foundation, Gregg Peters Monsees Foundation, Koo and Patricia Yuen, Seton J. Melvin, Sandra Atlas Bass, George D. Smith Fund, Inc., Dr. Coralyn W. Whitney Program Fund for Science and Nature, Bradley L. Goldberg Family Foundation, The Hite Foundation, Arlene and Milton D. Berkman, Paul H. Klingenstein and Kathleen R. Bole, Perpetual Kindness Foundation and Sun Hill Renewal Fund, Paul L. Tilley and Family, Kitty Hawks and Larry Lederman, and by Viewers Like You.
Extras
Uncover the story of the revival of northwestern India’s legendary tiger clan.
These tigers had lost their fear of humans — and it cost them their lives.
A tiger’s dangerous behavior shocks researchers, until the reason is revealed.
Faced with a powerful male, a mother tiger must choose: mate, or protect her cubs.
At Reteti Sanctuary, caretakers prepares to release their oldest orphans into the wild.
Go behind the scenes as the team captures a historic elephant herd release.
A call comes in: a week-old elephant calf has fallen into a well.
A young zebra forms a close bond with her keeper, but not everyone is ready to share the attention.
In northern Kenya, a remarkable conservation experiment is unfolding at Reteti Sanctuary.
Long’uro struggles to connect with other elephants after losing his trunk as a baby.

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