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“Sight‐unseen” detection of rare aquatic species using environmental DNA

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TLDR
Quantitative comparisons with traditional fisheries surveillance tools illustrate the greater sensitivity of eDNA and reveal that the risk of invasion to the Laurentian Great Lakes is imminent.
Abstract
Effective management of rare species, including endangered native species and recently introduced nonindigenous species, requires the detection of populations at low density. For endangered species, detecting the localized distribution makes it possible to identify and protect critical habitat to enhance survival or reproductive success. Similarly, early detection of an incipient invasion by a harmful species increases the feasibility of rapid responses to eradicate the species or contain its spread. Here we demonstrate the efficacy of environmental DNA (eDNA) as a detection tool in freshwater environments. Specifically, we delimit the invasion fronts of two species of Asian carps in Chicago, Illinois, USA area canals and waterways. Quantitative comparisons with traditional fisheries surveillance tools illustrate the greater sensitivity of eDNA and reveal that the risk of invasion to the Laurentian Great Lakes is imminent.

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Journal ArticleDOI

Environmental DNA (eDNA) applications in freshwater fisheries management and conservation in Canada: overview of current challenges and opportunities

TL;DR: In this paper , the authors identify challenges that eDNA researchers and conservation practitioners must overcome to fully unlock the benefits of eDNA for fish management in the Canadian context and advocate for the wider use of EDNA as a monitoring tool.
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eDNA metabarcoding reveals differences in fish diversity and community structure in heterogeneous habitat areas shaped by cascade hydropower

TL;DR: In this paper , an aquatic ecological survey of the 12 river sections of the mainstream of the Wujiang River was conducted using the efficient and noninvasive environmental DNA metabarcoding (eDNA) approach.
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Prioritizing taxa for genetic reference database development to advance inland water conservation

TL;DR: This article quantified the availability and distribution of barcode and genome data for freshwater macroscopic organisms in Canada, a country rich in inland water resources and thus particularly vulnerable to aquatic species losses.
References
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Journal ArticleDOI

MEGA: A biologist-centric software for evolutionary analysis of DNA and protein sequences

TL;DR: The motivation, design principles and priorities that have shaped the development of MEGA are discussed and how MEGA might evolve in the future to assist researchers in their growing need to analyze large data set using new computational methods are discussed.
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The role of propagule pressure in explaining species invasions.

TL;DR: Propagule pressure is proposed as a key element to understanding why some introduced populations fail to establish whereas others succeed and how the study of propagule pressure can provide an opportunity to tie together disparate research agendas within invasion ecology.
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Species detection using environmental DNA from water samples.

TL;DR: A novel approach, based on the limited persistence of DNA in the environment, to detect the presence of a species in fresh water, using specific primers that amplify short mitochondrial DNA sequences to track the existence of a frog in controlled environments and natural wetlands.
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Biological invasions: recommendations for U.S. policy and management.

TL;DR: The Ecological Society of America recommends that the federal government take the following six actions: use new information and practices to better manage commercial and other pathways to reduce the transport and release of potentially harmful species, and establish a National Center for Invasive Species Management.
Journal ArticleDOI

An ounce of prevention or a pound of cure: bioeconomic risk analysis of invasive species

TL;DR: A quantitative bioeconomic modelling framework is presented to analyse risks from non–indigenous species to economic activity and the environment, and it is shown that society could benefit by spending up to US$324 000 year−1 to prevent invasions into a single lake with a power plant.
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