Local anglers are more likely to take fish home to eat.
Dr Roger Young and Dr John Hayes have been studying the behaviour of backcountry trout after being caught and released. This work has considerable value in assessing what might happen to trout populations when dams are constructed on rivers. One of the longest-running freshwater biomonitoring programmes in New Zealand has been running in Taranaki. It covers the Kapuni Stream, which receives discharges from petrochemcial plants owned by Petrochem Ltd and the Natural Gas Corporation. Dr John Stark designed the programme in 1981, and Cawthron has continued the monitoring on a quarterly basis ever since.