​This Issues Backgrounder covers recent fish kills in the Murray Darling Basin (MDB). It focuses on the investigations into three large fish kills that occurred near Menindee on the Darling River over the 2018-19 summer.

This research by the Australia Institute suggests that the Darling River fish kill was due to the mismanagement of the Menindee Lakes in southwest New South Wales.

Abstract We assessed the landscape-scale effect of predation pressure from trout on the population integrity and distributions of non-diadromous galaxiids in high-country streams of the South Island, New Zealand. The effects of trout (brown trout, Salmo trutta, and rainbow trout, Oncorhynchus mykiss) on two widespread species, the Canterbury galaxias ( Galaxias vulgaris Stokell) and the...