Long-term trends of second generation anticoagulant rodenticides (SGARs) show widespread contamination of a bird-eating predator, the Eurasian Sparrowhawk (Accipiter nisus) in Britain

Broughton, Richard K.; Searle, Kate R.; Walker, Lee A.; Potter, E.D.; Pereira, M. Glória; Carter, Heather; Sleep, Darren; Noble, David G.; Butler, Adam; Johnson, Andrew C.

doi:10.1016/j.envpol.2022.120269

Cited by 8 publications

(8 citation statements)

References 50 publications

(89 reference statements)

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“…2019; Hunold & Mazuchowski 2020; Broughton et al. 2022) as is the case already in the European Union (Jacob & Buckle 2018). This trend mirrors a global shifting of attitudes from wildlife management to human–wildlife coexistence, particularly in highly developed countries and in urbanized areas (Manfredo et al.…”

Section: Introductionmentioning

confidence: 84%

Developing fertility control for rodents: a framework for researchers and practitioners

2023

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Fertility control is often heralded as a humane and effective technique for management of overabundant wildlife, including rodents. The intention is to reduce the use of lethal and inhumane methods, increase farm productivity and food security as well as reduce disease transmission, particularly of zoonoses. We developed a framework to guide researchers and stakeholders planning to assess the effectiveness of a potential contraceptive agent for a particular species. Our guidelines describe the overarching research questions which must be sequentially addressed to ensure adequate data are collected so that a contraceptive can be registered for use in broad‐scale rodent management. The framework indicates that studies should be undertaken iteratively and, at times, in parallel, with initial research being conducted on (1) laboratory‐based captive assessments of contraceptive effects in individuals; (2) simulation of contraceptive delivery using bait markers and/or surgical sterilization of different proportions of a field‐based or enclosure population to determine how population dynamics are affected; (3) development of mathematical models which predict the outcomes of different fertility control scenarios; and (4) implementation of large‐scale, replicated trials to validate contraceptive efficacy under various management‐scale field situations. In some circumstances, fertility control may be most effective when integrated with other methods (e.g. some culling). Assessment of non‐target effects, direct and indirect, and the environmental fate of the contraceptive must also be determined. Developing fertility control for a species is a resource‐intensive commitment but will likely be less costly than the ongoing environmental and economic impacts by rodents and rodenticides in many contexts.

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Section: Introductionmentioning

confidence: 84%

Developing fertility control for rodents: a framework for researchers and practitioners

2023

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“…These results suggest the possibility of various exposure sources with a low quantity of difenacoum. It is now recognized that AR contamination is widely spread in various wild animals, such as small passerines or invertebrates, that are potentially exposed to ARs by ingesting baits, rodent carcasses, feces and/or soil-bound residues. − In the UK, the insectivorous small mammal European hedgehog Erinaceus europaeus collected during 2004–2006 and the bird-eating raptor sparrowhawk during 1995–2015 showed a high prevalence of SGARs, particularly difenacoum (47.5 and 72.2%, respectively). Given the generalist diet of buzzards, , such various foods might be potentially additional sources of exposure.…”

Section: Discussionmentioning

confidence: 99%

“…The magnitude of ∑SGAR in buzzards was significantly higher in eastern England than in northern England or Scotland. Broughton et al 27 also demonstrated high SGAR concentrations in sparrowhawks from eastern England, where urbanization and intensive agriculture coverage was higher than in the other parts. Moreover, Roos et al 28 observed a positive relationship between the prevalence of SGARs in UK kestrels and the percentage of arable cereals, confirming high SGAR usage in arable farms.…”

Section: Environmental and Biological Factors Influencingmentioning

confidence: 94%

“…There was no significant difference in the number of each sex–age category within specimens whose sex and age were identified ( p -value of the Fisher exact test >0.05). The sample locations were classed into four regions as in the study of Broughton et al on SGARs in the Eurasian Sparrowhawk Accipiter nisus in the UK: “Scotland”, “northern England” (North West, North East, Yorkshire, & the Humber), “western England & Wales” (West Midlands, South West), and “eastern England” (South West, East of England, London, South East). When liver SGAR residue was detected, birds with hemorrhage in the absence of traumatic injury were considered to be poisoned with SGARs.…”

Section: Methodsmentioning

confidence: 99%

“…Given the complex situation with SGAR use, several studies have assessed the temporal trend of exposure of UK wildlife to SGARs (e.g., refs − ), and their results generally show increasing trends in exposure over time. Other studies have demonstrated some significant differences in exposure to SGARs before and after the change in regulation (e.g., refs , ).…”

Section: Introductionmentioning

confidence: 99%

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Significant Turning Point: Common Buzzard (Buteo buteo) Exposure to Second-Generation Anticoagulant Rodenticides in the United Kingdom

Ozaki,

Movalli,

Cincinelli

et al. 2024

Environ. Sci. Technol.

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Second-generation anticoagulant rodenticides (SGARs) are widely used to control rodent populations, resulting in the serious secondary exposure of predators to these contaminants. In the United Kingdom (UK), professional use and purchase of SGARs were revised in the 2010s. Certain highly toxic SGARs have been authorized since then to be used outdoors around buildings as resistance-breaking chemicals under risk mitigation procedures. However, it is still uncertain whether and how these regulatory changes have influenced the secondary exposure of birds of prey to SGARs. Based on biomonitoring of the UK Common Buzzard (Buteo buteo) collected from 2001 to 2019, we assessed the temporal trend of exposure to SGARs and statistically determined potential turning points. The magnitude of difenacoum decreased over time with a seasonal fluctuation, while the magnitude and prevalence of more toxic brodifacoum, authorized to be used outdoors around buildings after the regulatory changes, increased. The summer of 2016 was statistically identified as a turning point for exposure to brodifacoum and summed SGARs that increased after this point. This time point coincided with the aforementioned regulatory changes. Our findings suggest a possible shift in SGAR use to brodifacoum from difenacoum over the decades, which may pose higher risks of impacts on wildlife.

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Toxicology of chemical biocides: Anticoagulant rodenticides – Beyond hemostasis disturbance

Popov Aleksandrov,

Tucovic,

Kulas

et al. 2024

Comparative Biochemistry and Physiology Part C: Toxicology &

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Long-term trends of second generation anticoagulant rodenticides (SGARs) show widespread contamination of a bird-eating predator, the Eurasian Sparrowhawk (Accipiter nisus) in Britain

Cited by 8 publications

References 50 publications

Developing fertility control for rodents: a framework for researchers and practitioners

Developing fertility control for rodents: a framework for researchers and practitioners

Significant Turning Point: Common Buzzard (Buteo buteo) Exposure to Second-Generation Anticoagulant Rodenticides in the United Kingdom

Toxicology of chemical biocides: Anticoagulant rodenticides – Beyond hemostasis disturbance

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