AAP: Starving fish are killing sections of the Great Barrier Reef already weakened by climate change, an Australian scientist says. And some fish species also face extinction - with potentially serious consequences for commercial fisheries. Morgan Pratchett, of the James Cook University-based ARC Centre of Excellence for Coral Reef Studies in Townsville, has spent the last two months at Britain’s University of Newcastle using chemical markers, such as carbon 13, to study the feeding …