Study finds 'alarming' levels of chemicals in Great Barrier Reef turtles

Results of research into 2012 mass deaths offer insights into reef health and throw up further questions

Conservationists want major bays and estuaries along the Great Barrier Reef tested for contaminants after a five-year study found "alarming" levels of some chemicals in unhealthy turtles on the reef.

Scientists working on the research have also recommended expanded monitoring of turtle-population health on the Great Barrier Reef "as an indicator of the health of the reef itself".