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https://www.readbyqxmd.com/read/28215017/scaring-as-a-tool-to-alleviate-crop-damage-by-geese-revealing-differences-between-farmers-perceptions-and-the-scale-of-the-problem
#1
Caroline E Simonsen, Ingunn M Tombre, Jesper Madsen
Expanding populations of farmland foraging geese are causing escalating conflict with agriculture. We used questionnaires to investigate farmers´ perceptions in mid-Norway of spring staging geese and the extent to which they attempt to reduce pasture damage by goose scaring. We predicted farmers' scaring effort (a measure of dissatisfaction) to increase on fields closer to goose roosting sites where goose grazing intensity was highest (measured by dropping counts). Results showed no such relationship, suggesting that farmers' perception of goose use was not linked to actual goose use, but influenced by sociological factors and individual opinion...
March 2017: Ambio
https://www.readbyqxmd.com/read/28213031/antimicrobial-resistance-and-its-association-with-tolerance-to-heavy-metals-in-agriculture-production
#2
REVIEW
Zhongyi Yu, Lynda Gunn, Patrick Wall, Séamus Fanning
Antimicrobial resistance is a recognized public health challenge that since its emergence limits the therapeutic options available to veterinarians and clinicians alike, when treatment is warranted. This development is further compounded by the paucity of new antibiotics. The agri-food industry benefits from the availability of antimicrobial compounds for food-animal production and crop protection. Nonetheless, their improper use can result in the selection for bacteria that are phenotypically resistant to these compounds...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28211507/soil-aggregate-mediates-the-impacts-of-land-uses-on-organic-carbon-total-nitrogen-and-microbial-activity-in-a-karst-ecosystem
#3
Shuangshuang Xiao, Wei Zhang, Yingying Ye, Jie Zhao, Kelin Wang
Understanding the effect of land use on soil carbon, nitrogen, and microbial activity associated with aggregates is critical for thorough comprehension of the C and N dynamics of karst landscapes/ecosystems. We monitored soil organic carbon (SOC), total nitrogen (TN), microbial biomass carbon (MBC), and Cmic: Corg ratio in large macro- (>2 mm), small macro- (0.25-2 mm), and micro- (0.053-0.25 mm) aggregates to determine the changes in soil properties under different land uses in the karst area of Southwest China...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205235/differences-in-the-nutrient-concentrations-in-vitro-methanogenic-potential-and-other-fermentative-traits-of-tropical-grasses-and-legumes-for-beef-production-systems-in-northern-australia
#4
Zoey Durmic, Carlos A Ramírez-Restrepo, Chris Gardiner, Christopher J O'Neill, Eman Hussein, Phillip E Vercoe
BACKGROUND: In northern Australia, beef cattle grazed extensively on tropical rangelands are responsible for 5 % of the nation's total greenhouse gas emissions. Methane (CH4 ) is a potent greenhouse gas and in grazing ruminants might be mitigated by selecting forages that, when consumed, produce less CH4 when fermented by rumen microbes. This study examined variability in the in vitro fermentation patterns including CH4 production of selected tropical grasses and legumes to identify candidates for CH4 mitigation in grazing livestock in northern Australia...
February 16, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28203240/experimental-air-warming-of-a-stylosanthes-capitata-vogel-dominated-tropical-pasture-affects-soil-respiration-and-nitrogen-dynamics
#5
Miquel A Gonzalez-Meler, Lais B C Silva, Eduardo Dias-De-Oliveira, Charles E Flower, Carlos A Martinez
Warming due to global climate change is predicted to reach 2°C in tropical latitudes. There is an alarming paucity of information regarding the effects of air temperature on tropical agroecosystems, including foraging pastures. Here, we investigated the effects of a 2°C increase in air temperature over ambient for 30 days on an established tropical pasture (Ribeirão Preto, São Paulo, Brazil) dominated by the legume Stylosanthes capitata Vogel, using a T-FACE (temperature free-air controlled enhancement) system...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28202796/evaluation-of-genotypic-and-phenotypic-protease-virulence-tests-for-dichelobacter-nodosus-infection-in-sheep
#6
Andrew S McPherson, Om P Dhungyel, Richard J Whittington
Dichelobacter nodosus is a fastidious, strictly anaerobic bacterium, an obligate parasite of the ruminant hoof and the essential causative agent of virulent ovine footrot. The clinical disease results from a complex interplay between pathogen, environment and host. Sheep flocks diagnosed with virulent but not benign footrot in Australia may be quarantined and required to undergo a compulsory eradication program, with costs met by the farmer. Virulence of D. nodosus is at least partially dependent on elaboration of a protease coded by aprV2 and manifest as elastase activity...
February 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28194548/investigation-of-intra-herd-spread-of-mycobacterium-caprae-in-cattle-by-generation-and-use-of-a-whole-genome-sequence
#7
S Broeckl, S Krebs, A Varadharajan, R K Straubinger, H Blum, M Buettner
Single nucleotide polymorphisms (SNPs) calculated from whole genome sequencing (WGS) are ideally suited to study evolutionary relationships of pathogens and their epidemiology. Mycobacterium caprae infections have been documented frequently in cattle and red deer along the Bavarian and Austrian Alps during the last decade. However, little is still known about the transmission within cattle holdings and possible alterations of the genomes of M. caprae during such events. The aim of this study was to study the molecular epidemiology of bovine tuberculosis (bTB) in selected herds based on isolate-specific genome-wide SNPs and to perform a phylogenetic network analysis...
February 13, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28187655/-i-digitonthophagus-i-i-gazella-i-auctorum-an-unfortunate-case-of-mistaken-identity-for-a-widely-introduced-species-coleoptera-scarabaeidae-scarabaeinae-onthophagini
#8
François Génier, Adrian L V Davis
At risk of committing entomological heresy, we question the identity of a dung-burying beetle species that originates from Africa and has been introduced first into Hawaii and subsequently to Australasia, North America, and South America (Fincher 1986; Edwards 2007; Noriega et al. 2010) for pasture improvement and biological control of dung-breeding flies (Waterhouse 1974; Bornemissza 1979).  Under the name Onthophagus gazella (Fabricius 1787), it was the first species selected for introduction into Australia by the CSIRO Dung Beetle Project (Bornemissza 1976; Edwards 2007)...
January 19, 2017: Zootaxa
https://www.readbyqxmd.com/read/28177829/genomic-and-metabolic-characterisation-of-alkaloid-biosynthesis-by-asexual-epichlo%C3%A3-fungal-endophytes-of-tall-fescue-pasture-grasses
#9
Piyumi Ekanayake, Jatinder Kaur, Pei Tian, Simone Rochfort, Kathryn Guthridge, Tim Sawbridge, German Spangenberg, John Forster
Symbiotic associations between tall fescue grasses and asexual Epichloë fungal endophytes exhibit biosynthesis of alkaloid compounds causing both beneficial and detrimental effects. Candidate novel endophytes with favourable chemotypic profiles have been identified in germplasm collections by screening for genetic diversity, followed by metabolite profile analysis in endogenous genetic backgrounds. A sub-set of candidates was subjected to genome survey sequencing to detect the presence or absence and structural status of known genes for biosynthesis of the major alkaloid classes...
January 4, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28177410/combining-restricted-grazing-and-nitrification-inhibitors-to-reduce-nitrogen-leaching-on-new-zealand-dairy-farms
#10
Alvaro J Romera, Rogerio Cichota, Pierre C Beukes, Pablo Gregorini, Val O Snow, Iris Vogeler
Intensification of pastoral dairy systems often means more nitrogen (N) leaching. A number of mitigation strategies have been proposed to reduce or reverse this trend. The main strategies focus on reducing the urinary N load onto pastures or reducing the rate of nitrification once the urine has been deposited. Restricted grazing is an example of the former and the use of nitrification inhibitors an example of the latter. A relevant concern is the cost effectiveness of these strategies, independently and jointly...
January 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28177403/release-from-streambed-to-water-column-during-baseflow-periods-a-modeling-study
#11
Yongeun Park, Yakov Pachepsky, Eun-Mi Hong, Daniel Shelton, Cary Coppock
Streambed sediments can harbor large populations that are released into the water column during high-flow events. Few studies have been conducted on the rates of transfer from streambed sediment to water column in low-flow conditions in natural streams. The aim of this work was to apply the watershed-scale model SWAT (Soil and Water Assessment Tool) to a natural stream to evaluate the need to account for the release from streambed sediments during baseflow periods and to compare the results of simulating such a release by assuming predominantly passive transport, driven by groundwater influx, against simulations assuming predominantly active transport of random or chemotaxis-driven bacteria movement...
January 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28177395/influence-of-cow-breed-type-age-and-previous-lactation-status-on-cow-height-calf-growth-and-patterns-of-body-weight-condition-and-blood-metabolites-for-cows-grazing-bahiagrass-pastures
#12
S W Coleman, C C Chase, D G Riley, M J Williams
This study was initiated to evaluate performance and patterns of cow traits and blood metabolites of 3 breeds of cows grazing bahiagrass (Paspalum notatum Flügge) pastures in central Florida. Purebred cows (n = 411) of either Angus (Bos taurus), Brahman (Bos indicus), or Romosinuano (Bos taurus) breeding, rotationally grazed (moved twice weekly) bahiagrass pastures year-round, and received bahiagrass hay supplemented with molasses and soyhulls or legume hay supplemented with unfortified molasses from October to June each production year...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28177358/genetic-parameters-of-insect-bite-hypersensitivity-in-the-old-grey-kladruber-horse
#13
J Citek, L Vostry, H Vostra-Vydrova, M Brzakova, V Prantlova
The objective of this study was to assess the genetic parameters of insect bite hypersensitivity (IBH) in the Old Grey Kladruber horse, an original Czech warmblood horse breed. Insect bite hypersensitivity is a recurrent allergic skin disease affecting horses worldwide. Its etiology is multifactorial. The defect is genetically controlled, and the starting impulse is a bite by midges of the spp. and less frequently spp. Knowledge about the associated genes is limited. Horses were kept by the National Stud in Kladruby (1,146 measurements) and by 10 private breeders (63 measurements)...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28177350/effects-of-mass-airflow-rate-through-an-open-circuit-gas-quantification-system-when-measuring-carbon-emissions
#14
Stacey A Gunter, James A Bradford, Corey A Moffet
Methane (CH) and carbon dioxide (CO) represent 11 and 81%, respectively, of all anthropogenic greenhouse gas emissions. Agricultural CH emissions account for approximately 43% of all anthropogenic CH emissions. Most agricultural CH emissions are attributed to enteric fermentation within ruminant livestock; hence, the heightened interest in quantifying and mitigating this source. The automated, open-circuit gas quantification system (GQS; GreenFeed, C-Lock, Inc., Rapid City, SD) evaluated here can be placed in a pasture with grazing cattle and can measure their CH and CO emissions with spot sampling...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28166691/rhombencephalitis-caused-by-listeria-monocytogenes-in-a-pastured-bull
#15
Carolina Matto, Gustavo Varela, María Inés Mota, Ruben Gianneechini, Rodolfo Rivero
A pastured 2-y-old cross-breed bull developed brainstem encephalitis (rhombencephalitis); Listeria monocytogenes was isolated from the brain. In the brainstem, there was perivascular cuffing, multiple microabscesses, and positive immunostaining for L. monocytogenes. Samples of bovine feces, water, feedstuffs, milking parlor soil, and bulk tank milk were collected from the dairy farm. Seven isolates of the genus Listeria were obtained, 6 of L. innocua and 1 of L. monocytogenes, which was found in the pasture where the bull grazed...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28161167/ability-of-dairy-cows-to-ensure-pregnancy-according-to-breed-and-genetic-merit-for-production-traits-under-contrasted-pasture-based-systems
#16
N Bedere, C Disenhaus, V Ducrocq, S Leurent-Colette, L Delaby
The present study aimed to assess and measure the effects of breed, genetic merit for production traits, and feeding systems (FS) on the ability of dairy cows to ensure pregnancy through its components (fertilization, embryonic losses, recalving). An experiment was conducted over 9 yr on Normande and Holstein cows assigned to contrasted FS. Diets were based on maize silage in winter and grazing plus concentrate in spring in the high FS group, and on grass silage in winter and grazing with no concentrate during spring in the low FS group...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28158975/do-biofilm-communities-respond-to-the-chemical-signatures-of-fracking-a-test-involving-streams-in-north-central-arkansas
#17
Wilson H Johnson, Marlis R Douglas, Jeffrey A Lewis, Tara N Stuecker, Franck G Carbonero, Bradley J Austin, Michelle A Evans-White, Sally A Entrekin, Michael E Douglas
BACKGROUND: Unconventional natural gas (UNG) extraction (fracking) is ongoing in 29 North American shale basins (20 states), with ~6000 wells found within the Fayetteville shale (north-central Arkansas). If the chemical signature of fracking is detectable in streams, it can be employed to bookmark potential impacts. We evaluated benthic biofilm community composition as a proxy for stream chemistry so as to segregate anthropogenic signatures in eight Arkansas River catchments. In doing so, we tested the hypothesis that fracking characteristics in study streams are statistically distinguishable from those produced by agriculture or urbanization...
February 3, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28154571/a-review-of-perennial-ryegrass-endophytes-and-their-potential-use-in-the-management-of-african-black-beetle-in-perennial-grazing-systems-in-australia
#18
REVIEW
Mijail Karpyn Esqueda, Alan L Yen, Simone Rochfort, Kathryn M Guthridge, Kevin S Powell, Jacqueline Edwards, German C Spangenberg
The major insect pest of Australian cool temperate pastures is the root-feeding insect Heteronychus arator (African black beetle, ABB). Significant pasture damage can occur even at low ABB densities (11 individuals per square meter), and often re-sowing of the whole paddock is required. Mitigation of the effects of pasture pests, and in particular subterranean species such as the larval form of ABB, can be challenging. Early detection is limited by the ability to visualize above-ground symptoms, and chemical control of insects in soil is often ineffective...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28152459/combined-impacts-of-climate-and-socio-economic-scenarios-on-irrigation-water-availability-for-a-dry-mediterranean-reservoir
#19
João Pedro Nunes, Rita Jacinto, Jan Jacob Keizer
The impacts of climate and associated socio-economic changes on water availability, including supply and demand, quality, and storage volume, were evaluated for the Vale do Gaio reservoir in southern Portugal, located in a dry Mediterranean climate and already under drought stress. The SWAT model was applied with 6 scenarios for 2071-2100, involving two storylines (A1B and B1) with individual changes in climate (-9% rainfall, increasing in winter by +28 to +30%), socio-economic conditions (an increase in irrigation demand by 11%, and a replacement of cereals and pastures by sunflower), and a combination of both...
January 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28152335/association-between-age-and-time-from-calving-and-reported-lameness-in-a-dairy-herd-in-the-waikato-region-of-new-zealand
#20
W Mason
CASE HISTORY: During the 2014/2015 season 823 predominantly Holstein-Friesian cows calved on a pasture-based farm in the Waikato region of New Zealand. A high prevalence and recurrence rate of lameness had been noted for several years but cows feet were not routinely picked up and therapeutically trimmed. CLINICAL FINDINGS: At a farm visit in December 2015, 23 cows feet were examined and 18/23 (78%) cows had white line disease and 17/23 (74%) sole haemorrhages, as well as severely overgrown and misshapen hooves...
February 2, 2017: New Zealand Veterinary Journal
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