Sentences with phrase «using shark nets»

Not exact matches

STEP 5 Sometimes the cable is left to sink to the ocean floor and rest on the sandy bottom, but for the best protection from ship anchors, fishing nets and shark attacks, a sea plow or remotely operated vehicle may be used to bury cable between 1.5 and 3 metres below the bottom.

Instead of using advanced (and relatively untested) technology to attempt to repel sharks or nondiscriminatory nets that kill other threatened sea life as bycatch, researchers have simply caught sharks and moved them to where they would not pose a threat to swimmers.

Australian researchers used computerized tomography scans of the head of a great white shark accidentally killed in a commercial fishing net (great whites are a protected species) to construct a model of the animal's jaw musculature.

Restrictions on use of drift gill nets, which have a high rate of bycatch, have improved the survival of juvenile sharks.

In November, the World Conservation Union warned that more than 40 percent of shark and ray species in the Mediterranean were threatened with extinction because of intense fishing pressure, including the continued use of drift nets, which kill many sharks and rays even when they are not the target of the fishing effort.

The data that is sent back by the mobile lab carried by the robot is used by the research team to learn more about the sharks» homing abilities, but they're also presenting all the tracking information to the public in a free app called Shark Net.