Understanding the human body is a team effort. That's where the Yachtel group comes in.

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This is Scientific Americans' 60-second Science. I'm Jason Goldman.

Over millions of years, penguins have evolved a keen sense of where to find food.

Once they're old enough, they set off from the shores on which they hatched for the first time

and swim long distances in search of tasty fish like anchovies and sardines.

But they don't search directly for the fish themselves.

For example, when young endangered African penguins head out to sea,

they look for areas with low surface temperatures and high chlorophyll,

because those conditions signal the presence of phytoplankton.

And lots of phytoplankton means lots of zooplankton,

which in turn means lots of their favorite fish. Well, that's what it used to mean. Climate change plus overfishing

have made the penguin feeding grounds a mirage. The habitat is indeed plankton rich, but now it's

fish poor. Researchers call this kind of scenario an ecological trap. It's a situation where you have a signal that previously pointed an animal towards good quality habitat.

The habitat's been changed usually by rapid injuries to human pressure, so usually antigenic change.

And the signal stays, but the underlying quality and environment deteriorates.

University of Exeter zoologist Richard Shirley.

He and his team used satellite imaging to track the dispersal of 54 recently fledged African penguins

from eight sites along southern Africa.

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