Early ocean distribution of juvenile Chinook salmon in an upwelling ecosystem          下载免费PDF全文

Jason L. Hassrick  Mark J. Henderson  David D. Huff  William J. Sydeman  Megan C. Sabal  Jeffrey A. Harding  Arnold J. Ammann  Eric D. Crandall  Eric P. Bjorkstedt  John Carlos Garza  Sean A. Hayes 《Fisheries Oceanography》2016,25(2):133-146

Extreme variability in abundance of California salmon populations is often ascribed to ocean conditions, yet relatively little is known about their marine life history. To investigate which ocean conditions influence their distribution and abundance, we surveyed juvenile Chinook salmon (Oncorhynchus tshawytscha) within the California Current (central California [37°30′N) to Newport, Oregon (44°00′N]) for a 2‐week period over three summers (2010–2012). At each station, we measured chlorophyll‐a as an indicator of primary productivity, acoustic‐based metrics of zooplankton density as an indicator of potential prey availability and physical characteristics such as bottom depth, temperature and salinity. We also measured fork lengths and collected genetic samples from each salmon that was caught. Genetic stock identification revealed that the majority of juvenile salmon were from the Central Valley and the Klamath Basin (91–98%). We constructed generalized logistic‐linear negative binomial hurdle models and chose the best model(s) using Akaike's Information Criterion (AIC) to determine which covariates influenced the salmon presence and, at locations where salmon were present, determined the variables that influenced their abundance. The probability of salmon presence was highest in shallower waters with a high chlorophyll‐a concentration and close to an individual's natal river. Catch abundance was primarily influenced by year, mean fork length and proximity to natal rivers. At the scale of sampling stations, presence and abundance were not related to acoustic indices of zooplankton density. In the weeks to months after ocean entry, California's juvenile Chinook salmon population appears to be primarily constrained to coastal waters near natal river outlets.  相似文献   

Selenium Depletion Reduces Vaccination Response in Horses     

M. Brummer  S. Hayes  S.M. McCown  A.A. Adams  D.W. Horohov  L.M. Lawrence 《Journal of Equine Veterinary Science》2011,31(5-6):266-267

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Salter-Harris type III fractures of the distal humerus in two dogs     

Hayes GM  Radke H  Langley-Hobbs SJ 《Veterinary and comparative orthopaedics and traumatology》2011,24(6):478-482

Salter-Harris type III fractures of the distal humerus in a four-month-old male Labrador Retriever and a male crossbreed dog (estimated to be 3.5-months-old) are reported. Both fractures were treated with open reduction and interfragmentary compression by lag screw fixation. Both fractures healed and full limb use was regained at four weeks postoperatively. The occurrence of this unusual fracture type may be related to the physeal closure pattern of the distal humeral physis, and a different mechanism of injury compared to the more common Salter-Harris type IV fracture seen in this region.  相似文献   

Investigation of burnout syndrome and job‐related risk factors in veterinary technicians in specialty teaching hospitals: a multicenter cross‐sectional study     

Galina M. Hayes  Denise F. LaLonde‐Paul  Jennifer L. Perret  Andrea Steele  Marina McConkey  William G. Lane  Rosalind J. Kopp  Hannah K. Stone  Meredith Miller  Andria Jones‐Bitton 《Journal of Veterinary Emergency and Critical Care》2020,30(1):18-27

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Across-breed validation study confirms and identifies new loci associated with sexual precocity in Brahman and Nellore cattle     

Thaise Pinto de Melo  Marina Rufino Salinas Fortes  Ben Hayes  Lucia Galvão de Albuquerque  Roberto Carvalheiro 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2020,137(2):139-154

The aim of this study was to identify candidate regions associated with sexual precocity in Bos indicus. Nellore and Brahman were set as validation and discovery populations, respectively. SNP selected in Brahman to validate in Nellore were from gene regions affecting reproductive traits (G1) and significant SNP (p ≤ 10^–3) from a meta-analysis (G2). In the validation population, early pregnancy (EP) and scrotal circumference (SC) were evaluated. To perform GWAS in validation population, we used regression and Bayes C. SNP with p ≤ 10^–3 in regression and Bayes factor ≥3 in Bayes C were deemed significant. Significant SNP (for EP or SC) or SNP in their ±250 Kb vicinity region, which were in at least one discovery set (G1 or G2), were considered validated. SNP identified in both G1 and G2 were considered candidate. For EP, 145 SNP were validated in G1 and 41 in G2, and for SC, these numbers were 14 and 2. For EP, 21 candidate SNP were detected (G1 and G2). For SC, no candidate SNP were identified. Validated SNP and their vicinity region were located close to quantitative trait loci or genes related to reproductive traits and were enriched in gene ontology terms related to reproductive success. These are therefore strong candidate regions for sexual precocity in Nellore and Brahman.  相似文献   

Influence of speaker's gender on speaker introductions at the 2018 ACVS Surgical Summit     

Sarah E Boston DVM  DVSc  DACVS  ACVS Founding Fellow of Surgical Oncology  ACVS Founding Fellow of Oral & Maxillofacial Surgery  Galina Hayes BVSc  PhD  DACVS  DACVECC  Sara A Colopy DVM  PhD  DACVS  Katie C Kennedy DVM  MS  DACVS-SA  ACVS Fellow of Surgical Oncology  Owen T Skinner BVSc  DECVS  DACVS-SA  ACVS Fellow of Surgical Oncology  Matthew T Boylan BSc  MVB  Julia P Sumner BVSc  MANZCVS  DACVS-SA  Jolle Kirpensteijn DVM  PhD  DACVS  DECVS  ACVS Founding Fellow of Surgical Oncology  ACVS Founding Fellow of Minimally Invasive Surgery  Frances M James MA  VetMB  DACVS-LA  DECVS 《Veterinary surgery : VS》2020,49(5):879-883

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Long-term resource variation and group size: A large-sample field test of the Resource Dispersion Hypothesis     

Dominic DP Johnson  Samantha Baker  Michael D Morecroft  David W Macdonald 《BMC ecology》2001,1(1):2-18

Background  

The Resource Dispersion Hypothesis (RDH) proposes a mechanism for the passive formation of social groups where resources are dispersed, even in the absence of any benefits of group living per se. Despite supportive modelling, it lacks empirical testing. The RDH predicts that, rather than Territory Size (TS) increasing monotonically with Group Size (GS) to account for increasing metabolic needs, TS is constrained by the dispersion of resource patches, whereas GS is independently limited by their richness. We conducted multiple-year tests of these predictions using data from the long-term study of badgers Meles meles in Wytham Woods, England. The study has long failed to identify direct benefits from group living and, consequently, alternative explanations for their large group sizes have been sought.  相似文献   

Molecular mapping of Loci conferring resistance to different pathotypes of the spot blotch pathogen in barley     

Bilgic H  Steffenson BJ  Hayes PM 《Phytopathology》2006,96(7):699-708

ABSTRACT Spot blotch, caused by Cochliobolus sativus, is an important disease of barley in many production areas and is best controlled through the deployment of resistant cultivars. Information on the genetics of resistance in various sources can be useful in developing effective breeding strategies. Parents of the doubled haploid mapping population Calicuchima-sib/ Bowman-BC (C/B) exhibit a differential reaction to pathotypes 1 and 2 of C. sativus. To elucidate the genetics of spot blotch resistance in this population, C/B progeny were evaluated with both pathotypes at the seedling stage in the greenhouse and at the adult plant stage in the field. At the seedling stage, progeny segregated 84 resistant to 26 susceptible based on the qualitative analysis of infection response (IR) data to pathotype 1. This fit best to a 3:1 ratio, indicating that two genes were involved in conferring resistance. Quantitative analysis of the raw IR data to pathotype 1 revealed a single quantitative trait locus (QTL) on chromosome 4(4H) explaining 14% of the phenotypic variance. Adult plant resistance to pathotype 1 was conferred by QTL on chromosome 2(2H) and chromosome 3(3H), explaining 21 and 32% of the phenotypic variation, respectively. Bowman contributed the resistance alleles on chromosome 3(3H) and chromosome 4(4H), whereas Calicuchima-sib contributed the resistance allele on chromosome 2(2H). Resistance to pathotype 2 was conferred by a single gene (designated Rcs6) on chromosome 5(1H) based on qualitative analysis of data. Rcs6 was effective at both the seedling and adult plant stages and was contributed by Calicuchima-sib. This result was corroborated in the quantitative analysis of raw IR (seedling stage) and disease severity (adult plant stage) data as a single major effect (r(2) = 0.93 and 0.88, respectively) QTL was identified on chromosome 5(1H). Progeny with resistance to both pathotypes were identified in the C/B population and may be useful in programs breeding for spot blotch resistance.  相似文献   

Molecular Characterization, Phylogenetic Relationships, and Specific Detection of Peach mosaic virus     

James D  Varga A  Croft H  Rast H  Thompson D  Hayes S 《Phytopathology》2006,96(2):137-144

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Comparative pathogenicity of different Actinobacillus suis O/K serotypes.          下载免费PDF全文

D Slavi?  J DeLay  M A Hayes  J I MacInnes 《Canadian journal of veterinary research》2000,64(2):81-87

The pathogenicity of Actinobacillus suis serotypes O1/K1 (strain SO4), O1/K2 (strain C84), and O2/K2 (strain H91-0380) was evaluated in specific-pathogen-free (SPF) piglets challenged by intraperitoneal inoculation with approximately 1 x 10(7) colony-forming units per mL. All 3 strains produced peritonitis, but differences were observed in the composite histopathologic scores (P = 0.001) and in their ability to spread (P = 0.008) at 7 h post challenge. The O2/K2 strain caused the most severe peritonitis and disseminated most widely to other tissues. Moderate lesions were seen with the O1/K2 strain while the O1/K1 strain caused mild lesions and remained largely localized to the peritoneum. In an attempt to explain the basis of observed differences, the serum sensitivity of 9 A. suis strains with different O and K types was assessed. Regardless of the O/K type, all of the isolates tested were serum resistant. Moreover, most A. suis isolates grew as well or better in complement-replete sera as they did in complement-depleted sera. These observations indicate that although 02 and K2 strains had a greater propensity to cause a disseminating septic inflammatory response in pigs, they were no more resistant to complement-mediated killing than O1 strains.  相似文献