Commercial fishermen raise concerns about the impacts of industry.
The James Cook University study says that Gladstone dredging sediment is drifting up to 35 kilometres out to sea, reports abc.net.
Gladstone Ports Corporation has previously said floods are the cause of sick fish.
Commercial fishermen hope that the ports corporation takes notice, but the ports corporation has declined to comment on the report.
Dredging Today Staff, June 19, 2012; Image: westernbasinportdevelopment