DNA analysis confirms 2,000-year-old sustainable fishing practices of Tsleil-Waututh Nation

NOVEMBER 12, 2021

by Simon Fraser University

Ancient Indigenous fishing practices can be used to inform sustainable management and conservation today, according to a new study from Simon Fraser University.

Working with the Tsleil-Waututh Nation and using new palaeogenetic analytical techniques developed in SFU Archaeology's ancient DNA lab, directed by professor Dongya Yang, the results of a new collaborative study featured in Scientific Reports provides strong evidence that prior to European colonization, Coast Salish people were managing chum salmon by selectively harvesting males.

Selectively harvesting male salmon increases the overall size of the harvest, as male salmon are bigger than female salmon. It also helps ensure successful spawning as one male can mate with several females. This allows fisheries to maximize the size of their harvest without negatively impacting future returns.

"This management practice is also described in Coast Salish knowledge and, through archaeology, we were able to extend the time depth of this practice by 2,000 years," says Thomas Royle, a postdoctoral fellow working in the lab.

More:
https://phys.org/news/2021-11-dna-analysis-year-old-sustainable-fishing.html