Prediction of human cases of West Nile virus by equine cases, Saskatchewan, Canada, 2003     

Corrigan RL  Waldner C  Epp T  Wright J  Whitehead SM  Bangura H  Young E  Townsend HG 《Preventive veterinary medicine》2006,76(3-4):263-272

In 2003, an outbreak of West Nile virus (WNV) occurred in Saskatchewan, Canada from July to September. One-hundred thirty-three horse cases and 947 human cases were recorded and data were analyzed retrospectively for evidence of clustering to determine if clinical infection in the horse population could be used to estimate human risk of infection with WNV. Kulldorff's scan statistic was used to identify spatial-temporal clusters in both the human and horse cases. In most areas, human clusters were not preceded by horse clusters. In one area, a significant cluster of horse cases preceded human cases by 1 week; however, 1 week does not provide sufficient time for human-health authorities to act and provide advance warning for the public.  相似文献   

A first observation of spermatogenesis in mature male scalloped hammerheads (Sphyrna lewini) from Zinkwazi,KwaZulu-Natal,South Africa     

Coetzee  Helené J.  Naidoo  Kristina  Wagenaar  Ina 《Fish physiology and biochemistry》2021,47(3):713-723

Fish Physiology and Biochemistry - Sharks are not only threatened, but also have a low fecundity as they are being overfished. The shark family, Sphyrnidae, consists of nine species of which three...  相似文献   

Patterns and impacts of fish bycatch in a scallop dredge fishery     

Helen R. Craven  Andrew R. Brand  Bryce D. Stewart 《水产资源保护:海洋与淡水生态系统》2013,23(1):152-170

Positive PCR alone should not be considered sufficient to establish Dirofilaria repens as the cause of subcutaneous nodular lesions in the absence of a clear cytologic picture          下载免费PDF全文

Simone Manzocchi  Luigi Venco  Eleonora Piseddu  Nikola Pantchev  Carlo Masserdotti  Ugo Bonfanti  Francesco Albanese  Laura Helen Kramer  Walter Bertazzolo 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2017,46(3):389-390

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Response of ammonia oxidizers and denitrifiers to repeated applications of a nitrification inhibitor and a urease inhibitor in two pasture soils     

Xiuzhen Shi  Hang-Wei Hu  Kevin Kelly  Deli Chen  Ji-Zheng He  Helen Suter 《Journal of Soils and Sediments》2017,17(4):974-984

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Patterns of SSR variation in bread wheat (<Emphasis Type="Italic">Triticum aestivum</Emphasis> L.) seeds under ex situ genebank storage and accelerated ageing     

Yong-Bi Fu  Mo-Hua Yang  Carolee Horbach  Dallas Kessler  Axel Diederichsen  Frank M. You  Hong Wang 《Genetic Resources and Crop Evolution》2017,64(2):277-290

Maintaining seed viability and germplasm integrity is a challenging task in conservation of plant genetic resources, as seeds under storage will lose viability and genetic changes will occur. Attempt was made to analyze the patterns of genetic changes in wheat germplasm under ex situ genebank storage and accelerated ageing treatments. A set of 16 naturally aged wheat accessions under ex situ genebank storage since 1994 were sampled. Four recently regenerated wheat accessions were selected, four random seed samples were chosen from each accession, and three of them were exposed to three different accelerated ageing treatments. These 32 seed samples in two germplasm sets displayed a range of germination rates from 4 to 98 %. Thirty-seven microsatellite markers representing 21 wheat chromosomes were applied to screen 12 seeds of each sample and 449 SSR alleles were scored. Large SSR variation was found in each germplasm set. There was 73.1 % of the total SSR variation present among the naturally aged samples and 78.2 % present among the accelerated ageing samples. Several analyses for genetic association consistently revealed no clear genetic separations among samples of high or low germination rates in both germplasm sets. Samples under different accelerated ageing treatments did not show much genetic differentiations from the original sample of each accession. Mantel tests revealed non-significant associations between SSR variability and sample germination rates for both germplasm sets. These findings are useful for understanding seed deterioration under different ageing conditions and suggest that genome-wide SSR variability may not provide sensitive markers for the monitoring of wheat seed viability.  相似文献   

Folate Polyglutamylation is Required for Rice Seed Development   总被引：1，自引：0，他引：1  

Nampeung Anukul  Riza Abilgos Ramos  Payam Mehrshahi  Anahi Santoyo Castelazo  Helen Parker  Anne Diévart  Nadège Lanau  Delphine Mieulet  Gregory Tucker  Emmanuel Guiderdoni  David A. Barrett  Malcolm J. Bennett 《Rice》2010,3(2-3):181-193

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Use of different items of “enrichment” for individual and group kept horses     

Grete Helen Meisfjord Jørgensen  Silje Hanche-Olsen Listøl  Knut Egil Bøe 《Journal of Veterinary Behavior: Clinical Applications and Research》2010,5(4):216

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Signs of left heart volume overload in severely anaemic cats     

Helen E. Wilson BVSc  Shailen Jasani MA  VetMB  Tobias B. Wagner Dr Med Vet  Livia Benigni DVM Dip ECVDI CertVDI  Joanna R. Milne BVMS  Alison L. Stokes BVetMed  Virginia Luis-Fuentes MA  VetMB  PhD  CertVR  DVC  Dip ACVIM  Dip ECVIM-CA 《Journal of Feline Medicine and Surgery》2010,12(12):904-909

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Habitat variables explain Loggerhead Shrike occurrence in the northern Chihuahuan Desert,but are poor correlates of fitness measures     

Véronique St-Louis  Anna M. Pidgeon  Murray K. Clayton  Brian A. Locke  Dallas Bash  Volker C. Radeloff 《Landscape Ecology》2010,25(4):643-654

Conservation efforts should be based on habitat models that identify areas of high quality and that are built at spatial scales that are ecologically relevant. In this study, we developed habitat models for the Loggerhead Shrike (Lanius ludovicianus) in the Chihuahuan Desert of New Mexico to answer two questions: (1) are highly used habitats of high quality for shrikes in terms of individual fitness? and (2) what are the spatial scales of habitat associations relevant to this species? Our study area was Fort Bliss Army Reserve (New Mexico). Bird abundance was obtained from 10 min point counts conducted at forty-two 108 ha plots during a 3-year period. Measures of fitness were obtained by tracking a total of 73 nests over the 3 years. Habitat variables were measured at spatial scales ranging from broad to intermediate to local. We related habitat use and measures of fitness to habitat variables using Bayesian model averaging. We found a significant relationship between bird abundance and measures of fitness averaged across nesting birds in each plot (correlation up to 0.61). This suggests that measures of habitat use are indicative of habitat quality in the vicinity of Fort Bliss. Local- and intermediate-scale variables best explained shrike occurrence. Habitat variables were not related to any measures of fitness. A better understanding of the factors that limit individual bird fitness is therefore necessary to identify areas of high conservation value for this species.  相似文献