Barriers against invasive crayfish species in natural waters and fish passes - Practical experience

Krieg, Raphael; King, Alex C.; Zenker, Armin

doi:10.1016/j.gecco.2020.e01421

Cited by 10 publications

(21 citation statements)

References 63 publications

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“…Some field studies also assessed the impact of sea lamprey barriers on native fish movements (e.g., Pratt et al, 2009). In Europe (11 studies), AIS exclusion barriers have largely targeted invasive crayfish (e.g., Dana et al, 2011;Frings et al, 2013;Kerr et al, 2020;Krieg et al, 2021). Apart from crayfish studies, vertical barriers have also been tested to limit the spread of European minnow (Phoxinus phoxinus) in Scandinavia (Holthe et al, 2005), an innovative trap has been designed to intercept Chinese mitten crab (Eriocheir sinensis) as they migrate through a fish pass in Belgium (Schoelynck et al, 2020), and electric barriers have been used to protect endangered populations of endemic Mediterranean trout (Salmo cettii) from introduced brown trout (Salmo trutta) in Italy (Sabatini et al, 2018).…”

Section: Global Research Effortmentioning

confidence: 99%

“…For example, low-head lipped weirs can prevent movements of nonjumping sea lamprey while allowing passage of recreationally important salmonids, but unfortunately, they also impede the upstream movement of many small-bodied native fish (Porto et al, 1999;Dodd et al, 2003). Velocity barriers that block invasive crayfish but allow passage of fish have also been designed (Frings et al, 2013;Kerr et al, 2020;Krieg et al, 2021) but their effect on native species movement has not been robustly tested in the field. Exclusion screens are often designed to prevent passage of larger bodied invasive species but allow free movement of smaller-bodied native species.…”

Section: Effects Of Ais Exclusion Barriers On Native Faunamentioning

confidence: 99%

“…comm. ); the Pont, England (two barriers at separate locations); and a variety of barriers have recently been tested in Switzerland (Krieg et al, 2021). The Spanish barriers were for red swamp crayfish, while the remainder were for signal crayfish.…”

Section: Europe: Managing the Movement Of Invasive Crayfish With Physical Barriersmentioning

confidence: 99%

“…In Spain, vertical 1.5-2 m barriers, which incorporate overhanging crests, a central V-notch and vertical wing walls, have prevented red swamp crayfish invasion upstream (Dana et al, 2011) but they inevitably impact connectivity for native biota. The Swiss study reported some success in preventing the upstream movement of signal crayfish in a variety of natural and artificial channels, but the various designs were not tested for long enough, with study duration varying from hours to a maximum of 3 months (Krieg et al, 2021).…”

Section: Europe: Managing the Movement Of Invasive Crayfish With Physical Barriersmentioning

confidence: 99%

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The Use of Barriers to Limit the Spread of Aquatic Invasive Animal Species: A Global Review

et al. 2021

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Aquatic invasive species (AIS) are one of the principal threats to freshwater biodiversity. Exclusion barriers are increasingly being used as a management strategy to control the spread of AIS. However, exclusion barriers can also impact native organisms and their effectiveness is likely to be context dependent. We conducted a quantitative literature review to evaluate the use of barriers to control animal AIS in freshwater ecosystems worldwide. The quantitative aspect of the review was supplemented by case studies that describe some of the challenges, successes, and opportunities for the use of the use of AIS exclusion barriers globally. Barriers have been used since the 1950s to control the spread of AIS, but effort has been increasing since 2005 (80% of studies) and an increasingly diverse range of AIS taxa are now targeted in a wide range of habitat types. The global use of AIS barriers has been concentrated in North America (74% of studies), Australasia (11%), and Europe (10%). Physical barriers (e.g., weirs, exclusion screens, and velocity barriers) have been most widely used (47%), followed by electric (27%) and chemical barriers (12%). Fish were the most targeted taxa (86%), followed by crustaceans (10%), molluscs (3%) and amphibians (1%). Most studies have been moderately successful in limiting the passage of AIS, with 86% of the barriers tested deterring >70% of individuals. However, only 25% of studies evaluated barrier impacts on native species, and development of selective passage is still in its infancy. Most studies have been too short (47% < 1 year, 87% < 5 years) to detect ecological impacts or have failed to use robust before-after-control-impact (BACI) study designs (only 5%). Hence, more effective monitoring is required to assess the long-term effectiveness of exclusion barriers as an AIS management tool. Our global case studies highlight the pressing need for AIS control in many ecoregions, and exclusion barriers have the potential to become an effective tool in some situations. However, the design and operation of exclusion barriers must be refined to deliver selective passage of native fauna, and exclusion barriers should only be used sparingly as part of a wider integrated management strategy.

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Section: Global Research Effortmentioning

confidence: 99%

Section: Effects Of Ais Exclusion Barriers On Native Faunamentioning

confidence: 99%

Section: Europe: Managing the Movement Of Invasive Crayfish With Physical Barriersmentioning

confidence: 99%

Section: Europe: Managing the Movement Of Invasive Crayfish With Physical Barriersmentioning

confidence: 99%

See 2 more Smart Citations

The Use of Barriers to Limit the Spread of Aquatic Invasive Animal Species: A Global Review

et al. 2021

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“…On the one hand, it could be addressed by adopting a pragmatic approach that does not exclude either of the two options a priori but evaluates case by case which one to prefer based on the local ecological context. On the other hand, it could be addressed by refining the construction techniques of barriers so that they allow the selective passage of fish, while preventing that of crayfish (Krieg et al 2021). Moreover, NICS-and especially P. clarkii (Gherardi and Barbaresi 2000)-possess a great dispersion capacity, which could make in time barriers insufficient.…”

Section: Well-being (A1) and Fairness (A3)mentioning

confidence: 99%

Value-conflicts in the conservation of a native species: a case study based on the endangered white-clawed crayfish in Europe

Biasetti

Ferrante

Bonelli

et al. 2021

Rend. Fis. Acc. Lincei

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The future of the native European crayfish Austropotamobius pallipes depends on accurate conservation management. The goal of this paper is to attempt an investigation of the major ethical conflicts that can emerge in the conservation of this endangered crayfish threatened by invasive competitors, introduced diseases, and landscape alteration. To assess this issue, we will employ the Ethical Matrix, in a version explicitly tailored for its use in conservation. The filled Ethical Matrix will highlight several potential conflicts between values such as environmental protection, social and economic interests, animal welfare, cultural and aesthetic value, etc. We will discuss these conflicts, alongside some potential mitigating strategies present in the literature. We will stress in particular the need to take into account the ethical principle of fairness when assessing the economic and recreational value of invasive species, especially concerning the unfair distribution of costs. Moreover, we will assert the importance of conservation of A. pallipes both for its existence value and for its role as an umbrella and keystone species. Beyond its focus on A. pallipes, the Ethical Matrix here discussed might also provide insights on the value conflicts relative to analogous in situ conservation efforts involving a native species threatened by invasive alien competitors. Graphic abstract

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Environmental DNA‐based methods detect the invasion front of an advancing signal crayfish population

et al. 2022

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Barriers against invasive crayfish species in natural waters and fish passes - Practical experience

Cited by 10 publications

References 63 publications

The Use of Barriers to Limit the Spread of Aquatic Invasive Animal Species: A Global Review

The Use of Barriers to Limit the Spread of Aquatic Invasive Animal Species: A Global Review

Value-conflicts in the conservation of a native species: a case study based on the endangered white-clawed crayfish in Europe

Environmental DNA‐based methods detect the invasion front of an advancing signal crayfish population

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