Methods for estimating streamflow characteristics at ungaged sites in western Montana based on data through water year 2009: Chapter G in &lt;i&gt;Montana StreamStats&lt;/i&gt;

Worldwide, freshwater ecosystems are threatened by invasive species, resulting in adverse effects on infrastructure, economy, recreation, and native aquatic communities. In stream settings, chemical piscicides can be an effective tool for eradicating invasive fishes. However, chemical treatments are expensive and time consuming, and they do not discriminate between invasive and native species in a system. Therefore, managers would ideally limit treatment to only the area occupied by the invasive species. Because traditional survey methods may not accurately detect individuals in low abundance (e.g., at the edge of their distribution, or following an eradication effort), chemical treatments may be applied more broadly and more often than is necessary to ensure complete coverage. Furthermore, inadequate posttreatment sampling can fail to detect survivors of a treatment. As a result, managers may erroneously conclude that eradication was successful, leaving the ecosystem vulnerable to reestablishment by the invader. More sensitive sampling tools should allow for more precise definition of the treatment area and more accurate evaluation of project success. This would reduce project costs and overall effects on native species. Here, we illustrate how environmental DNA (eDNA) sampling addressed these challenges through three case studies, each of which used eDNA sampling to inform the removal of Brook Trout Salvelinus fontinalis in small streams. We found that eDNA methods can be informative throughout all stages of eradication projects in stream settings. It can assist with delimiting the population

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“…Stream flows downstream of the barrier range from 0.10 m 3 /s at base flow to 1.70 m 3 /s at bankfull flow (McCarthy et al. ).…”

Section: Resultsmentioning

confidence: 99%

Environmental DNA Sampling Informs Fish Eradication Efforts: Case Studies and Lessons Learned

Carim

Bean²,

Connor³

et al. 2020

N American J Fish Manag

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“…The Libby Creek watershed drains the east side of the rugged Cabinet Mountains and is located within the globally rare inland temperate rainforest biome (DellaSala et al 2011). The estimated mean June-August discharge at the Bear Creek site is 30.1 ft 3 /s (0.85 m 3 /s), and 30.2 ft 3 /s (0.86 m 3 /s) at the Ramsey Creek site (McCarthy et al 2016). The mean summer water temperature at both study sites during 2018 was 9.79°C (Clancy et al 2021).…”

Section: Methodsmentioning

confidence: 91%

Relationship of Trout Growth to Frequent Electrofishing and Diet Collection in a Headwater Stream

Clancy

Dunnigan

Budy

2021

N American J Fish Manag

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Research on fishes sometimes requires that individual fish be captured and subjected to invasive procedures multiple times over a relatively short time span. Electrofishing is one of the most common techniques used to capture fish, and it is known to cause injury to fish under certain circumstances. We evaluated the relationship of growth rates in Columbia River Redband Trout Oncorhynchus mykiss gairdneri to the number of times that they were captured via electrofishing and gastrically lavaged during the summer of 2018 in a mountainous, headwater stream. We captured fish between two and seven times over the course of 86 d using continuous (smooth) DC backpack electrofishing. We observed no relationship between the growth rate of Columbia River Redband Trout and the number of times that they were captured or gastrically lavaged. Although these findings contrast with hatchery electrofishing experiments, they may represent the greater resiliency of wild fish. It appears that researchers can use electrofishing and gastric lavage in cold waters at least once per month, and potentially up to twice per month, without greatly affecting the growth of wild Columbia River Redband Trout.

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Low-head hydropower as a reserve power source: A case study of Northeastern Illinois

et al. 2021

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Methods for estimating streamflow characteristics at ungaged sites in western Montana based on data through water year 2009: Chapter G in <i>Montana StreamStats</i>

Cited by 4 publications

References 8 publications

Environmental DNA Sampling Informs Fish Eradication Efforts: Case Studies and Lessons Learned

Environmental DNA Sampling Informs Fish Eradication Efforts: Case Studies and Lessons Learned

Relationship of Trout Growth to Frequent Electrofishing and Diet Collection in a Headwater Stream

Low-head hydropower as a reserve power source: A case study of Northeastern Illinois

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