Preface: the 10th International Charr Symposium held in Nikko, Japan.

The 10th International Charr Symposium was held in Nikko, Japan, bringing together researchers from 11 countries to discuss the ecological and evolutionary studies of charr species, such as Arctic charr and lake charr. The symposium covered various topics, including migration patterns, feeding habits, and habitat differences among charr species. Researchers emphasized the importance of conservation and management of charr species worldwide, especially in the face of anthropogenic stressors like climate change and development. The symposium aimed to foster collaboration and knowledge-sharing among scientists to deepen our understanding of charr biology and contribute to their conservation. [Extracted from the article]