Exploring drivers of the usage of anticoagulant rodenticides on UK farms     

Alexandra J. Tomlinson  Annie Rayner  Ashleigh Bright  David P. Cowan  Kate E. Littin  Ruth Layton 《国际虫害防治杂志》2018,64(3):271-278

Anticoagulant rodenticides (ARs) are considered inhumane, show increasingly limited efficacy due to acquired resistance, and carry environmental consequences associated with non-target species uptake. In a questionnaire study of 499 UK farms that all deployed chemical rodenticide we found a high mean reliance (79%), on second generation ARs with just over half of the respondents using no other rodent control methods. Additional methods where deployed, alone or in combination, included predation (41%), kill-trap deployment (16%) and shooting (1%). Nearly 40% of all respondents deployed rodenticides year-round. There was no evidence to suggest that “tidy-farm” measures, such as clearing food spills and minimising on-farm rodent harbourage sites aimed at minimising rodent-associated problems, were associated with a lower likelihood of year-round deployment; in fact trends in our analyses suggested the opposite. We therefore encourage operators to fully evaluate the true necessity of rodenticide deployment before AR use.  相似文献   

Effects of photoperiod,light intensity,turbidity and prey density on feed incidence and survival in first feeding yellow tang (Zebrasoma flavescens)(Bennett)          下载免费PDF全文

Erin Pereira‐Davison  Chatham K Callan 《Aquaculture Research》2018,49(2):890-899

Zebrasoma flavescens (Bennett) aquaculture is limited by high mortality during first feeding. Photoperiod, light intensity, turbidity and prey density are culture parameters that have been shown to affect feed incidence and survival in some food fish species, offering a logical starting point to improve first feeding in Z. flavescens. This study aimed to determine the effect of photoperiod, light intensity, turbidity and prey density on feed incidence and survival in larval yellow tang age 3 DPH to 5 DPH (days post hatch). Larvae were reared in four photoperiods (24L:0D, 16L:8D, 12L:12D, 0L:24D), four light intensities (1,500, 3,000, 4,500 and 6,500 lx), three turbidity ranges (0 cells/ml, 100,000–200,000 cells/ml and 400,000–600,000 cells/ml) and four prey densities (1, 3, 6 and 9 per mL). Photoperiod at 16L:8D and 12L:12D significantly increased feed incidence; 16L:8D significantly increased survival. Light intensities at 3,000 and 4,500 lx significantly increased feed incidence. Larvae reared in 400,000–600,000 cells/ml fed and survived significantly better than those in clear water. Larvae in 1 per mL fed and survived significantly less than those fed at 6 per mL.  相似文献   

Characterization of Potato spindle tuber viroid (PSTVd) incidence and new variants from ornamentals     

Jaroslav Matoušek  Rajen J. J. Piernikarczyk  Petr Dědič  Josef Mertelík  Kateřina Uhlířová  Ganesh S. Duraisamy  Lidmila Orctová  Kateřina Kloudová  Jiří Ptáček  Gerhard Steger 《European journal of plant pathology / European Foundation for Plant Pathology》2014,138(1):93-101

We analyzed the spreading and persistence of PSTVd variants in several ornamentals in the territory of the Czech Republic. The pool of PSTVd variants detected in Solanum jasminoides, S. muricatum, Datura sp. and Brugmansia sp. was biolistically transferred to Matricaria chamomilla, Argyranthemum frutescens and Diascia sp., species which we found as sensitive hosts for PSTVd from ornamentals. The PSTVd pool showed sequence changes and increased variation after its transfer to potato, suggesting a wide adaptation potential of PSTVd in this crop. Potato exhibited genotype-dependent leaf and spindle tuber symptoms, when inoculated with the sap from S. jasminoides infected with the predominant and sequence-stable PSTVd-S1.  相似文献   

Environmental and spatial characterisation of bacterial community composition in soil to inform sampling strategies     

Kate L. Baker  Silke Langenheder  Graeme W. Nicol  Dean Ricketts  Kenneth Killham  Colin D. Campbell  James I. Prosser 《Soil biology & biochemistry》2009,41(11):2292-2298

Soil physicochemical properties and microbial communities are highly heterogeneous and vary widely over spatial scales, necessitating careful consideration of sampling strategies to provide representative and reproducible soil samples across field sites. To achieve this, the study aimed to establish appropriate sampling methodology and to determine links between the variability of parameters, utilising two sampling strategies. The first (design 1) involved extracting 25 cores from random locations throughout the field and pooling them into five sets of five cores. The second (design 2) involved a further 25 cores within five 1 m² sub-plots. Sub-samples from each sub-plot were pooled in order to determine between and within sub-plot variability. All samples were analysed independently and as pooled sub-samples. Results indicate that pooling spatially separated samples significantly reduced the variability in pH, compared to individual samples. Pooling samples from a small area resulted in lower within sub-plot variability than between sub-plots for pH and bacterial community composition assessed by terminal-restriction fragment length polymorphism analysis. Following multivariate statistical analysis, a large amount of variation in community composition was explained by soil pH, which is remarkable given the relatively small size of the sampling area and minor differences in pH. Moisture content was also important in determining bacterial communities in the random design (design 1). In the 1 m² sub-plot design (design 2), the spatial location of the plots explained a large degree of the variation in bacterial community composition between plots, which was due to spatial autocorrelation of pH and possible additional environmental parameters. This study emphasises the importance of sampling design for obtaining representative samples from soil.  相似文献   

Updating our knowledge of mycobacterial infection of fish     

Creevy KE  Quinn FD 《Veterinary journal (London, England : 1997)》2009,180(1):5-6

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Photoperiod and Soil Munition Constituent Effects on Phytoaccumulation and Rhizosphere Interactions in Boreal Vegetation     

Ryan R. Busby  Robyn A. Barbato  Carina M. Jung  Kate A. Morozova  Anthony J. Bednar  Andrew L. Bray  Jenifer M. Milam  Jared C. Smith  Karl J. Indest 《Water, air, and soil pollution》2018,229(12):380

Permafrost thaw is expected to alter biogeochemistry and hydrology, potentially increasing the mobility of soil constituents. Northern latitude boreal forests where permafrost thaw is occurring also experience extreme changes in day length during the growing season. As the effects of photoperiod on plant uptake of soil constituents or interactions with the rhizosphere are unknown, our objective was to determine these interactions with three plant species from different functional groups. A tree, forb, and grass common to military training ranges in this region were grown in soil spiked with or without lead, antimony, or 2,4-dinitrotoluene and grown under 16, 20, or 24 h of light. Plant biomass, soil constituent uptake, and rhizosphere bacterial communities were compared between treatments. Photoperiod had no effect on plant uptake of any soil constituent or on rhizosphere community, indicating that plants and their associated microbial communities adapted to this environment are resilient to extremes in photoperiod. Lead uptake was not significant in any plant species and had no effect on the rhizosphere. Antimony increased the percentage composition of Saprospirales in the rhizospheres of two of the three plants, indicating an interaction between this bacterial order and antimony. Antimony uptake by white spruce (Picea glauca) was considerable, with a mean concentration of 1731 mg kg^?1 in roots, while mean shoot concentration was only 155 mg kg^?1, indicating its potential to phytostabilize this heavy metal. Although antimony had the strongest impact on the rhizosphere bacterial community, it was also readily accumulated by the grass and tree.  相似文献   

The effect of postsurgical pain on attentional processing in horses     

Louise Dodds  Laura Knight  Kate Allen  Joanna Murrell 《Veterinary anaesthesia and analgesia》2017,44(4):933-942

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Leishmaniasis in a dog native to Colorado     

Freeman KS  Miller MD  Breitschwerdt EB  Lappin MR 《Journal of the American Veterinary Medical Association》2010,237(11):1288-1291

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Herpesvirus systematics   总被引：1，自引：0，他引：1  

Andrew J. Davison 《Veterinary microbiology》2010

This paper is about the taxonomy and genomics of herpesviruses. Each theme is presented as a digest of current information flanked by commentaries on past activities and future directions.  相似文献   

Catching sharks: recreational saltwater angler behaviours and attitudes regarding shark encounters and conservation          下载免费PDF全文

Kate Mcclellan Press  John Mandelman  Elizabeth Burgess  Steven J. Cooke  Vivian M. Nguyen  Andy J. Danylchuk 《水产资源保护:海洋与淡水生态系统》2016,26(4):689-702