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In these days of environmental awareness, it comes (1) ______ a surprise to many that the fishermen of some countries are (2) ______ using nets which are over twenty-five kilometres, long. These drift nets (3) ______ pulled behind boats and clear the seas and oceans of all the living creatures swimming near the surface.
Some of the main victims of (4) ______ controversial fishing technique are dolphins, sea turtles and whales. The fishermen are typically trying to catch tuna or swordfish, (5) ______ up to 85% of the species (6) ______ end up in their nets are (7) ______ types of sea creatures.
Scientists are confused by the fact (8) ______ dolphins are not able to avoid the nets. (9) ______ making high-pitched sounds which bounce off objects in (10) ______ way, dolphins use "echolocation" to detect the objects in (11) ______ of them. More study is necessary to learn (12) ______ this ability of the dolphins is not allowing them to stay out of the nets.
International pressure is building (13) ______ to end the use of drift nets. (14) ______ that happens, though, marine mammals (15) ______ continue to die, held beneath the surface of the water and unable to breathe the air they need to survive.
Some of the main victims of (4) ______ controversial fishing technique are dolphins, sea turtles and whales. The fishermen are typically trying to catch tuna or swordfish, (5) ______ up to 85% of the species (6) ______ end up in their nets are (7) ______ types of sea creatures.
Scientists are confused by the fact (8) ______ dolphins are not able to avoid the nets. (9) ______ making high-pitched sounds which bounce off objects in (10) ______ way, dolphins use "echolocation" to detect the objects in (11) ______ of them. More study is necessary to learn (12) ______ this ability of the dolphins is not allowing them to stay out of the nets.
International pressure is building (13) ______ to end the use of drift nets. (14) ______ that happens, though, marine mammals (15) ______ continue to die, held beneath the surface of the water and unable to breathe the air they need to survive.