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Science Quickly

Crop Rotation Works in the Sea, Too

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 13 May 2015

⏱️ 2 minutes

🧾️ Download transcript

Summary

Models show that leaving sea cucumbers unharvested in some underwater zones for two years at a time stabilizes the overall population and actually increases yield for fishers. Cynthia Graber reports   Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

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

0:05.8

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

0:11.0

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

0:19.6

To learn more about Yachtolt, visit yawcult.co.

0:22.7

.j.p. That's Y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacult.

0:34.1

This is Scientific American 60-second science. I'm Cynthia Graber. Got a minute?

0:39.4

Crop rotation is a recognized way to keep soil and the food ecosystem healthy.

0:43.9

Now scientists are saying that rotation could be a useful tool in the sea.

0:48.2

Researchers tracked a shallow water near-shore species used for food, sea cucumbers.

0:52.9

They're easy to harvest and are fairly valuable,

0:55.4

but those same attributes mean they're easy to over harvest. The practice has put some sea cucumber

1:00.0

species at high risk of extinction, even in a relatively well-managed area, the Great Barrier

1:04.8

Marine Park in Australia. In 2004, authorities split the Great Barrier Reef into 154 zones,

1:12.1

where each zone was fished only once every three years.

1:14.0

Fishers rotate through the region.

1:15.9

In computer models, the researchers ran through dozens of simulations of each zone, both before

1:20.4

and after the divisions took place.

1:22.6

The trials revealed that even with an identical and low-catch allowance in all cases, the

1:27.0

sea cucumbers would recover

1:28.3

more fully under the rotation strategy than by harvesting simultaneously throughout the region.

1:33.3

In fact, in trials that included rotations, the yield actually increased.

1:37.3

The research is in the proceedings of the National Academy of Sciences.

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