This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.
Habitat use and movements of Australian grayling (Prototroctes maraena) in a Victorian coastal stream
Riverine fishes are among the most imperilled fauna in the world, but for many species there is little or no understanding of their ecological requirements. The Australian grayling (Prototroctes maraena) is a small diadromous fish endemic to rivers in south-eastern Australia that has declined considerably in range and abundance and is listed as threatened nationally. To improve understanding of the species’ movement ecology and to inform the development of conservation management actions, we examined the day-to-day movements and habitat use of Australian grayling (n = 7) over 8 weeks using radiotelemetry. Tagged Australian grayling typically occupied restricted (i.e. tens to hundreds of metres) reaches of stream, and were mostly located in moderate to fast flowing habitats (i.e. glide/run), although at night use of slower-flowing habitats (i.e. pools) increased. They also undertook longer-distance downstream movements during a period of increased streamflow. Incorporation of such information into management strategies has the potential to improve our capacity to maintain or reinstate the conditions required to conserve and restore Australian grayling populations.
MF17198 Accepted 04 January 2018
© CSIRO 2018