DPG is a comprehensive underwater photography website and community for underwater photographers. Learn underwater photography techniques for popular digital cameras and specialized professional underwater equipment (wide angle, macro, super macro, lighting and work flow). Read latest news, explore travel destinations for underwater photography. Galleries of professional and amateur underwater photography including wrecks, coral reefs, undersea creatures, fashion and surfing photography.
Dive Photo Guide

News

Why Octopuses Don't End Up in a Tangle
By Ian Seldrup, May 16, 2014 @ 01:30 AM (EST)
Source: Science Daily

Ever wondered why octopuses don’t tie themselves in knots? A team from the Hebrew University of Jerusalem believes they have discovered how they achieve it: a chemical produced by octopus skin temporarily stops the suckers from doing their job.

Experiments have previously demonstrated that octopuses cannot keep track of the precise location of their arms—as the number of limbs and their degrees of freedom would require immense processing power from the octopus brain—so the newly discovered chemical mechanism turns out to be an ingenious solution to a challenging problem.

To show how the octopus manages the feat, the scientists covered Petri dishes with octopus skin and observed how amputated octopus arms (which remain alive for an hour after separation) never grabbed onto the dishes. In other experiments, an extract of the skin was applied to dishes, and it was found that the force with which the amputated arms attached themselves was much less than normal. It was concluded, therefore, that living octopuses are able to control that behavior by making use of this chemical signal in the skin.

The researchers are working to identify the active agent involved, with a possible view to making use of the idea in biologically inspired robot design.

Read more here

RELATED ARTICLES

LATEST EQUIPMENT

AOI UH-GPx
Isotta Housing for OM System OM-1 I & II
SeaLife SportDiver Smartphone Housing
Nauticam Fisheye Conversion Port (FCP)
Ikelite RC1 TTL Receiver for AOI and Backscatter Octo Housings
Be the first to add a comment to this article.
You must be logged in to comment.
Support Our Sponsors
Newsletter
Travel with us

Featured Photographer



Follow Us

Sponsors