Splitting Chinook salmon into two groups based on their DNA could aid conservation efforts. But some researchers argue that this would be a misuse of the data.
Genomic analysis of ancient chum salmon bones and cultural knowledge from the Tsleil-Waututh Nation suggest that people in the Pacific Northwest managed fisheries for thousands of years by harvesting males and releasing females.
Scientists who work with foreign biological specimens face a patchwork of permits that threaten to block their projects, with potentially harmful consequences for the ecosystems they study.