PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Fish research. Biologist weighing stunned fish by the banks of their river during biological research. These fish have been stunned by passing an electric current through the water, which allows them to be caught but does them no long- term damage. The fish are classified, weighed and measured. Research such as this helps to ascertain the health of a river and check that fish populations are stable. The fish are released after the measurements have been taken. Photographed in France.
Model release not available. Property release not required.