scholarly journals Monitoring the eradication of the highly invasive topmouth gudgeon (Pseudorasbora parva) using a novel eDNA assay

2018 ◽  
Author(s):  
Chloe Victoria Robinson ◽  
Carlos Garcia de Leaniz ◽  
Matteo Rolla ◽  
Sofia Consuegra
Keyword(s):  
Invasive Species ◽  
Water Framework Directive ◽  
Ecological Integrity ◽  
Qpcr Assay ◽  
Detection Methods ◽  
Invasive Fish ◽  
Pseudorasbora Parva ◽  
Monitoring Methods ◽  
Topmouth Gudgeon ◽  
Trade Offs

AbstractAquatic Invasive Species (AIS) represent an important threat for Biodiversity and are one of the factors determining the ecological integrity of water bodies under the Water Framework Directive. Eradication is one of the most effective tools for the management of invasive species but has important economic and ecological trade-offs and its success needs to be carefully monitored. We assessed the eradication success of the topmouth gudgeon (Pseudorasbora parva), an invasive fish that poses significant risks to endemic aquatic fauna, in four ponds previously treated with the piscicide Rotenone using a novel environmental DNA (eDNA)-qPCR assay. Topmouth gudgeon was detected in all four treated ponds using 750 mL water samples and in three of the ponds using 15 mL samples, despite the eradication treatment. The highly sensitive qPCR assay detected topmouth gudgeon in a significantly greater proportion of sites (77.5%) than eDNA detection methods based on conventional PCR (35%). Our results highlight the difficulties of eradicating invasive fish and the need to incorporate reliable monitoring methods as part of a risk management strategy under the Water Framework Directive.

Piscivorous fishes diet dominated by the Asian cyprinid invader, topmouth gudgeon (Pseudorasbora parva)

Biologia ◽  
2007 ◽  
Vol 62 (4) ◽  
Author(s):  
Jiří Musil ◽  
Zdeněk Adámek
Keyword(s):  
Czech Republic ◽  
Prey Species ◽  
Ecological Integrity ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Cyprinid Fish ◽  
Pseudorasbora Parva ◽  
Sander Lucioperca ◽  
Topmouth Gudgeon ◽  
Native Fishes

AbstractPredation on the non-native cyprinid, Pseudorasbora parva, was reported during an annual study in a small connecting canal about 40 km south of Brno, Czech Republic. Two cyprinid fish species (Pseudorasbora parva, Rutilus rutilus) were identified in the diet of 23 piscivores belonging to three native fishes (Perca fluviatilis, Sander lucioperca, Esox lucius). The relative abundance of prey fishes changed seasonally and was dominated by the topmouth gudgeon in spring. Thereafter roach incidence continuously increased. In contrast, topmouth gudgeon was found to be a more sized-available prey and was the most dominant prey species in the diet of all piscivorous fishes during the whole season. Strong piscivory towards this alien might be beneficial for its eradication or control to support ecological integrity in natural and modified seminatural habitats.

scholarly journals Ihtiofauna lacului refrigerеnt Cuciurgan în anul 2020

2021 ◽  
Author(s):  
Mihail Mustea ◽  
Keyword(s):  
Invasive Species ◽  
Functional Status ◽  
Fish Species ◽  
Aquatic Ecosystem ◽  
Invasive Fish ◽  
Pseudorasbora Parva ◽  
Cooling Reservoir ◽  
Main Emphasis ◽  
Diversity Structure

The relevance of the paper lies in the fact that in previous investigations of the ichthyofauna of Cuciurgan cooling reservoir, the main emphasis was placed on economically valuable species. However, a number of invasive fish species have been less investigated, despite occupying, and currently occupying, dominant positions in the structure of the ichthyocenosis of this aquatic ecosystem. The aim of the paper is to research and update data on the diversity, structure and functional status of the ichthyofauna of the Cuciurgan cooling reservoir in conditions of increased anthropogenic and bioinvasive impact. The invasive species Pseudorasbora parva was first identified in the resevoir ecosystem.

scholarly journals Associated disease risk from the introduced generalist pathogen Sphaerothecum destruens: management and policy implications

Parasitology ◽  
2016 ◽  
Vol 143 (9) ◽  
pp. 1204-1210 ◽  
Author(s):  
DEMETRA ANDREOU ◽  
RODOLPHE ELIE GOZLAN
Keyword(s):  
Disease Risk ◽  
Close Association ◽  
Meta Analysis ◽  
Policy Implications ◽  
Disease Emergence ◽  
Invasive Fish ◽  
Pseudorasbora Parva ◽  
Topmouth Gudgeon ◽  
Potential Source ◽  
Available Information

SUMMARYThe rosette agent Sphaerothecum destruens is a novel pathogen, which is currently believed to have been introduced into Europe along with the introduction of the invasive fish topmouth gudgeon Pseudorasbora parva (Temminck & Schlegel, 1846). Its close association with P. parva and its wide host species range and associated host mortalities, highlight this parasite as a potential source of disease emergence in European fish species. Here, using a meta-analysis of the reported S. destruens prevalence across all reported susceptible hosts species; we calculated host-specificity providing support that S. destruens is a true generalist. We have applied all the available information on S. destruens and host-range to an established framework for risk-assessing non-native parasites to evaluate the risks posed by S. destruens and discuss the next steps to manage and prevent disease emergence of this generalist parasite.

West Asian colonisation of topmouth gudgeon, Pseudorasbora parva (Teleostei: Gobionidae): Genetic admixture at the crossroad of Europe and east Asia

2020 ◽  
Author(s):  
Zohreh Ganjali ◽  
Hamid Reza Esmaeili ◽  
Fatah Zarei ◽  
Golnaz Sayyadzadeh ◽  
Soheil Eagderi ◽  
...  
Keyword(s):  
East Asia ◽  
Genetic Admixture ◽  
Pseudorasbora Parva ◽  
Topmouth Gudgeon

Using complementary remote detection methods for retrofitted eco-passages: a case study for monitoring individual koalas in south-east Queensland

2016 ◽  
Vol 43 (5) ◽  
pp. 369 ◽  
Author(s):  
C. E. Dexter ◽  
R. G. Appleby ◽  
J. P. Edgar ◽  
J. Scott ◽  
D. N. Jones
Keyword(s):  
Road Construction ◽  
Primary Objective ◽  
Correlated Data ◽  
Camera Traps ◽  
Detection Methods ◽  
Urban Landscapes ◽  
Monitoring Methods ◽  
Monitoring Method ◽  
Phascolarctos Cinereus ◽  
The Individual

Context Vehicle-strike has been identified as a key threatening process for koala (Phascolarctos cinereus) survival and persistence in Australia. Roads and traffic act as barriers to koala movement and can impact dispersal and metapopulation dynamics. Given the high cost of wildlife mitigation structures such as purpose-built fauna-specific underpasses or overpasses (eco-passages), road construction and management agencies are constantly seeking cost-effective strategies that facilitate safe passage for fauna across roads. Here we report on an array of detection methods trialled to verify use of retrofitted road infrastructure (existing water culverts or bridge underpasses) by individual koalas in fragmented urban landscapes in south-east Queensland. Aims The study examined whether the retrofitting of existing road structures at six sites facilitated safe passage for koalas across roads. Our primary objective was to record utilisation of retrofitted infrastructure at the level of the individual. Methods We used a combination of existing monitoring methods such as GPS/VHF collars, camera traps, sand plots, and RFID tags, along with a newly developed animal-borne wireless identification (WID) tag and datalogging system, specifically designed for this project, to realise the study aims. Key results We were able to verify 130 crossings by koalas involving a retrofitted structure or a road surface over a 30-month period by using correlated data from complementary methods. We noted that crossings were generally uncommon and mostly undertaken by only a subset of our tagged individuals at each site (21% overall). Conclusions An important element of this study was that crossing events could be accurately determined at the level of the individual. This allowed for detailed assessment of eco-passage usage, rather than the more usual approach of simply recording species’ presence. Implications This study underscores the value of identifying the constraints of each individual monitoring method in relation to site conditions. It also highlights the benefits of contingency planning to limit data loss (i.e. using more than one method to collect data). We suggest an approach that uses complementary monitoring methods has significant advantages for researchers, particularly with reference to improving understanding of whether eco-passages are meeting their prescribed conservation goals.

scholarly journals What’s for Dinner? Assessing the Value of an Edible Invasive Species and Outreach Actions to Promote Its Consumption

2021 ◽  
Author(s):  
Inês Cerveira ◽  
Vânia Baptista ◽  
Maria Alexandra Teodósio ◽  
Pedro Morais
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Aquatic Invasive Species ◽  
Native Range ◽  
Invasive Fish ◽  
Press Releases ◽  
Cynoscion Regalis ◽  
The Public ◽  
Native Resources ◽  
A New Species

Abstract Promoting the consumption of edible aquatic invasive species has gained popularity to minimize its impacts while easing pressure on native resources. Weakfish Cynoscion regalis (Bloch & Schneider, 1801) is one of the most recent invasive fish species in the Iberian Peninsula (Europe) which once sustained an important fishery in the native range (Northwest Atlantic Ocean). Portugal ranks third in the list of the world’s top fish consumers, so promoting a weakfish fishery could at least help minimize the impacts upon native species, since weakfish have innate traits that are likely appreciated by Portuguese fish consumers. However, introducing a new species to consumers is challenging owing to consumers’ habits and unfamiliarity with the species. So, we aimed to (i) evaluate the acceptance of weakfish by a panel of Portuguese fish consumers and (ii) create outreach actions – partnerships with local Chefs and press releases – to explain to a broader public what invasive species are and promote the consumption of edible aquatic invasive species. The survey that we conducted to Portuguese fish consumers showed that weakfish has great chances of being well accepted by the public – 90% of consumers would buy weakfish because they appreciated its appearance, flavour, and texture, besides being a wild fish. The outreach actions reached a few million people because 46 online articles were published, and three news pieces broadcasted on national television. Overall, our strategy greatly increased the public’s awareness about invasive species, which can be replicated elsewhere in the world.

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