European Non‐native Species in Aquaculture Risk Analysis Scheme – a summary of assessment protocols and decision support tools for use of alien species in aquaculture

Copp, Gordon H.; Russell, I. C.; Peeler, E. J.; Gherardi, Francesca; Tricarico, Elena; MacLeod, Alan; Cowx, I. G.; Nunn, A. D.; Occhipinti‐Ambrogi, Anna; Savini, Dario; Mumford, John; Britton, J. Robert

doi:10.1111/fme.12074

Cited by 66 publications

(87 citation statements)

References 25 publications

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“…With regard to the other countries, except for Hungary where measures for conservation of native carp are relevant (Balon, 1995;Ko s co and Hol c ık, 2008), informed decisions on a case-by-case basis should still be considered as part of wider pan-European risk assessments (e.g., Copp et al, 2015b), and the general guidelines provided above are likely to apply. However, it remains to be evaluated to what extent the precautionary ("guilty until proven innocent") approach advocated by some (e.g., Savini et al, 2010) would be fully defensible.…”

Section: Risk Areasmentioning

confidence: 99%

Experimental Evidence from Causal Criteria Analysis for the Effects of Common CarpCyprinus carpioon Freshwater Ecosystems: A Global Perspective

Vilizzi

Tarkan

Copp

2015

Reviews in Fisheries Science & Aquaculture

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126

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As the most widely distributed freshwater fish worldwide, common carp Cyprinus carpio can be either invasive or "naturalized" in most areas of introduction. This leads to different levels of perception regarding the species' role in freshwater ecosystems, with experimental research focusing either on its "middle-out" impacts or overall function in limnological processes. At the same time, the large scales at which carp dynamics operate may severely limit the validity of laboratory and, oftentimes, field experiments in extrapolating results to real-world ecosystems. In this study, 129 laboratory, field, and "natural" experiments were systematically reviewed through causal criteria analysis, and within an historical/biogeographical and risk-assessment context. Of the 19 countries where experiments were conducted, only 4 were considered as "low risk" and one as "no risk, " the other being "medium" to "high risk. " Experimental findings from 373 component-wise assessments supported the framework of effects on water quality, vegetation, invertebrates, and vertebrates, with the latter including also amphibians and waterfowl, previously unreported. Stronger evidence was provided by natural and field relative to laboratory experiments, reflecting the reductionism of the latter. Critical biomass for an impact was highly dependent on experimental setup, even though the overall threshold of %200 kg ha ¡1 under natural conditions supported recent findings. Management of carp should reflect the level of current and potential risk posed by the species in its different areas of distribution, thereby accounting for projections of further spread but also for unsuccessful colonization. Future experimentation should favor a holistic!reductionist over a reductionist!holistic approach.

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Section: Risk Areasmentioning

confidence: 99%

Experimental Evidence from Causal Criteria Analysis for the Effects of Common CarpCyprinus carpioon Freshwater Ecosystems: A Global Perspective

Vilizzi

Tarkan

Copp

2015

Reviews in Fisheries Science & Aquaculture

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126

132

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“…The utilisation of experiments to predict invasion impacts can thus provide important theoretical insights and results of high utility to invasion risk management (Copp et al, 2009(Copp et al, , 2016. However, an issue with some experimental ecological approaches is that they are completed under intense conditions in relatively short timeframes and are thus outside of ecological norms.…”

Section: Discussionmentioning

confidence: 99%

“…This species might be a specific non-native fish for which there is minimal extant information on their impacts in wild situations and thus the experiment aims to predict their potential impacts for invasive species that can be used as the basis of invasion impact assessments (Copp et al, 2009(Copp et al, , 2016. Alternatively, the focal non-native fish can be used as a model that is representative of a wider range of nonnative taxa that enables conclusions to be drawn on impact predictions that are relevant beyond the study system (Dick et al, 2017a).…”

Section: Approaches Model Species and Experimental Designmentioning

confidence: 99%

Untitled

Britton¹

2019

Turk. J. Fish. Aquat. Sci.

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Predicting the ecological impacts of invasive fishes is crucial for understanding their risks in the environment. Experimental approaches that provide empirical data on invasion impacts provide both theoretical insights and data of high management utility for prioritising high-risk invaders. Here, a synthesis of some experimental approaches that predict invasion impacts of non-native fish is presented, where the focus is on impacts relating to the trophic impacts of the invader on either native trophically analogous fishes or prey populations. Experiments in tank aquaria are advantageous in providing homogenous and controlled conditions that also enable high replication. Competition-based studies can determine invasion impacts via exposure of fish to fixed food rations, although these experiments tend to produce results in intensely competitive conditions that might not occur in the wild. Comparative functional response experiments in tank aquaria have been successfully applied to determining the relative impacts of invaders compared with native species on prey populations, and have revealed high resource efficiency in globally invasive piscivorous fishes. Experiments completed in mesocosms and small ponds have the advantage of providing replicated systems in semi-natural conditions. They have been successful in revealing that rather than competing with native fishes, many invasive fishes show strong patterns of trophic niche partitioning. These patterns are also evident in these fishes when in natural invaded communities. Thus, whilst it is often suggested invasion impacts from non-native fishes result from inter-specific competition, evidence for this from experimental and field-based predictions is equivocal.

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“…For piscivorous fishes, impacts tend to be via predation with, for example, invasive largemouth bass Micropterus salmoides and peacock basses of the Cichla genus having deleterious impacts on native species richness and fish abundance (Gratwicke & Marshall, 2001;Pelicice & Agostinho, 2009). Managing the impact of invasive fishes in open systems is challenging (Britton, Gozlan, & Copp, 2011), so predictions that indicate whether an introduced species will develop an invasion are fundamental to their management (Copp et al, 2014(Copp et al, , 2016. Spatial assessments of somatic growth rates assist these predictions (Britton, Harper, & Oyugi, 2010), especially as growth rates can be a strong proxy of other life-history traits (Oyugi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…There has been much less focus on their spatial variability in growth parameters (Milardi, Lappalainen, Malinen, Vinni, & Ruuhijärvi, 2011;Pérez-Bote & Roso, 2012), and how their age range and somatic growth rates might vary across their native and invasive distributions. This is despite the ecological and management utility of these data for assisting invasion risk assessments across their invasive range (Copp et al, 2014(Copp et al, , 2016.…”

Section: Introductionmentioning

confidence: 99%

Spatial variability in the somatic growth of pikeperch Sander lucioperca, an invasive piscivorous fish

Nolan

Britton

2018

Ecology of Freshwater Fish

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Introduced fishes can develop invasive populations that impact native species and ecosystems. Understanding the population ecology of introduced species in their extended ranges and how this compares to their native ranges is therefore important for informing their management. Here, the age and somatic growth rates of the piscivorous freshwater fish pikeperch Sander lucioperca were analysed across their invasive and native ranges to determine their spatial patterns and drivers. Analyses were initially completed in their invaded range in central and western England. Populations varied spatially in their growth rates; being slowest for a population in a narrow and shallow canal and fastest in a large, impounded lowland river. A meta-analysis of parameters of the von Bertalanffy growth model then revealed that across their native and invasive ranges, their theoretical ultimate lengths (L ∞ ) and growth coefficients (K) were significantly related to latitude, but not longitude. Their relationships with latitude were nonlinear, with higher values of L ∞ and lower values of K being evident towards their northerly and southerly range limits. Faster growth rates were evident in the middle of their range (45 to 55°N), suggesting temperatures here were most optimal for growth, but were in a trade-off with reduced ultimate lengths. These spatial patterns suggest that whilst introduced S. lucioperca can colonise new waters across a wide area, the expression of their life-history traits will vary spatially, with potential implications for how invasive populations establish and integrate into native fish communities. K E Y W O R D Sclimate change, invasion, latitude-growth relationships, scale ageing, von Bertalanffy growth model, zander

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European Non‐native Species in Aquaculture Risk Analysis Scheme – a summary of assessment protocols and decision support tools for use of alien species in aquaculture

Abstract: The European Non-native Species in Aquaculture Risk Analysis Scheme (ENSARS) was developed in response to European 'Council Regulation No. 708/

Cited by 66 publications

References 25 publications

Experimental Evidence from Causal Criteria Analysis for the Effects of Common CarpCyprinus carpioon Freshwater Ecosystems: A Global Perspective

Experimental Evidence from Causal Criteria Analysis for the Effects of Common CarpCyprinus carpioon Freshwater Ecosystems: A Global Perspective

Untitled

Spatial variability in the somatic growth of pikeperch Sander lucioperca, an invasive piscivorous fish

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