Grayling and brown trout are charismatic salmonid fish and keystone species of their respective habitats. Many populations of the Swiss Plateau have shown alarming declines over the last two decades. The reason for these declines are still not sufficiently understood. In this context, over 100,000 embryos have been photographed at least twice after hatching to determine growth under various environmental conditions. The aim of the project would be to design shape-based segmentation algorithms and to develop an ImageJ plugin for measure several morphometric measurements of the larvae.
This project is in collaboration with David Nusbaumer from the Department of Ecology and Evolution (University of Lausanne), the Fishery Inspectorate of the Bern canton and the Federal Office for the Environment.