Introduction:The UN Declaration on the Rights of Indigenous Peoples states that indigenous people have a fundamental right to contribute to the management of the resources that support their livelihoods.Salmon are vit...Introduction:The UN Declaration on the Rights of Indigenous Peoples states that indigenous people have a fundamental right to contribute to the management of the resources that support their livelihoods.Salmon are vital to the economy and culture of First Nations in coastal British Columbia,Canada.In this region,traditional systems of management including weirs-fences built across rivers to selectively harvest salmon-supported sustainable fisheries for millennia.In the late-19th century traditional fishing practices were banned as colonial goverments consolidated control over salmon.Outcomes:In collaboration with the Hei ltsuk First Nation we revived the practice of weir building in the Koeye River.Over the first four years of the project we tagged 1,226 sockeye,and counted 8,036 fish during fall stream walks.We used a mark-recapture model which accounted for both pre-spawn mortality due to variation in temperature,and tag loss,to produce the first mark-resight estimates of sockeye abundance in the watershed(4,600-15,000 escapement).Discussion:High river temperatures are associated with increased en route morality in migrating adult sockeye.We estimated pre-spawn mortality ranged from 8-72%across the four years of study,highlighting the degree to which climate conditions may dictate future viability in sockeye salmon populations.These results demonstrate the power of fusing traditional knowledge and management systems with contemporary scientific approaches in developing local monitoring.展开更多
基金The Tula foundation has provided generous funding and technical support through the Hakai Institute.Additional funders include TIDES Canada,the Pacific Salmon Foundation,the Vancouver Foundation,and the McLean Foundation.W.Atlas is supported by a Hakai Research Fellowship,and J.Moore receives funding through the Liber Ero Foundation.
文摘Introduction:The UN Declaration on the Rights of Indigenous Peoples states that indigenous people have a fundamental right to contribute to the management of the resources that support their livelihoods.Salmon are vital to the economy and culture of First Nations in coastal British Columbia,Canada.In this region,traditional systems of management including weirs-fences built across rivers to selectively harvest salmon-supported sustainable fisheries for millennia.In the late-19th century traditional fishing practices were banned as colonial goverments consolidated control over salmon.Outcomes:In collaboration with the Hei ltsuk First Nation we revived the practice of weir building in the Koeye River.Over the first four years of the project we tagged 1,226 sockeye,and counted 8,036 fish during fall stream walks.We used a mark-recapture model which accounted for both pre-spawn mortality due to variation in temperature,and tag loss,to produce the first mark-resight estimates of sockeye abundance in the watershed(4,600-15,000 escapement).Discussion:High river temperatures are associated with increased en route morality in migrating adult sockeye.We estimated pre-spawn mortality ranged from 8-72%across the four years of study,highlighting the degree to which climate conditions may dictate future viability in sockeye salmon populations.These results demonstrate the power of fusing traditional knowledge and management systems with contemporary scientific approaches in developing local monitoring.
