New research: Fish eyes – the hidden diet journal
It is strange to think of an eye as a diet journal, but a fish’s eye can tell much about what it has been eating at each point in its life. If we know what a fish has been eating and when, then we can figure out where a fish has been. You just need to know where to look and how to understand what the eye is telling you. This approach formed the basis for our publication Advancing diet reconstruction in fish eye lenses in Methods in Ecology and Evolution. In this study, we used stable isotopes of carbon, nitrogen, and sulfur in fish eyes to better understand diet and habitat history of juvenile and adult Chinook Salmon (Oncorhynchus tshawytscha).