Paul Humphries is a river and fish ecologist with 40 years' research experience in
many parts of Australia and overseas. Paul co-edited Ecology of Australian Freshwater Fishes with Keith Walker (CSIRO Publishing, 2013) and wrote The Life and Times of the Murray Cod (CSIRO Publishing, 2023).

Katherine Doyle is an aquatic ecologist with more than 15 years' experience researching the ecology, management and restoration of freshwater and marine ecosystems. Her current research focuses on fisheries management at river infrastructure, such as hydropower and irrigation schemes, as well as on threatened and invasive fish species.