John Hayes
Senior Scientist – Freshwater Fisheries and Ecohydraulics Research
Role at Cawthron
John is a senior scientist in the Coastal and Freshwater Group and is responsible for managing freshwater fisheries and ecohydraulics research and consulting programmes.
Technical skills, experience and interests
- Recreational trout and salmon fisheries
- In-stream habitat modelling with the in-stream flow incremental methodology (IFIM) and with process-based models
- Native fish ecology and distribution modelling
- A bioenergetics-based whole-lifetime growth model for trout
- World-leading process-based models integrating river hydraulics, invertebrate drift dispersion, bioenergetics-based trout growth and carrying capacity
- Best paper in Transactions of the American Fisheries Society award in 2001 for a paper on a whole-lifetime bioenergetics growth model for drift-feeding brown trout
- Communication of fisheries and ecohydraulics science to the public
- Regular contributor to Fish and Game New Zealand magazine
- Co-authored ‘The Artful Science of Trout Fishing’ with Les Hill, acclaimed fishing photographer
Professional affiliations
- New Zealand Freshwater Sciences Society
- American Fisheries Society
Qualifications
- PhD (Zoology). University of Canterbury, 1984
- BSc (Hons, Zoology). University of Canterbury, 1979