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- W2946861285 abstract "ABSTRACT The pink salmon Oncorhynchus gorbuscha was introduced from its native range in the Pacific to Northwest Russia several times since the 1950’s. While this species has been regularly observed in rivers in Northern Norway since that time, there has been an upsurge in the numbers of odd-year O. gorbuscha individuals observed in rivers in southern Norway in recent years, and particularly in 2017. Although the wide-scale effects of this species presence are currently uncertain, there are concerns regarding potential competition between O. gorbuscha and native species – most notably the Atlantic salmon Salmo salar. Environmental (e)DNA is becoming a widely used tool to monitor rare and invasive species in aquatic environments. In the present pilot study, primers and a probe were developed to detect O. gorbuscha from eDNA samples taken from a Norwegian river system where the species was observed. Water samples were taken at both upstream and downstream locations of the Lysakerelva river during Autumn 2017 (to coincide with spawning) and during late Spring 2018. Autumn samples were positive for O. gorbuscha at both sampling locations, whereas Spring samples showed positive detection of this species in the upstream region of the river, when smolt should have left, or be in the process of leaving the river. These findings reveal that eDNA-based methods can be used detect the presence of O. gorbuscha during their spawning season. This suggests that odd-year populations have the potential to become established in the studied river system. We recommend that eDNA sampling is repeated to determine whether individuals of this odd-year population have survived at sea and return to spawn. Our assay specificity tests indicate that the tools developed in the present study can be used for detection of O. gorbuscha in both Norwegian and other European river systems where presence/absence data is required. We also suggest some modifications to our methodology that may improve upon the detection capabilities of O. gorbuscha using eDNA." @default.
- W2946861285 created "2019-06-07" @default.
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- W2946861285 date "2019-05-31" @default.
- W2946861285 modified "2023-09-26" @default.
- W2946861285 title "Environmental (e)DNA detection of the invasive pink salmon <i>Oncorhynchus gorbuscha</i> during the 2017 Norwegian invasion" @default.
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- W2946861285 doi "https://doi.org/10.1101/651554" @default.
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