Effect of weaning age and the use of different sized Artemia nauplii as first feed for jade perch Scortum barcoo     

Stijn Van Hoestenberghe  Mathieu Wille  Evelien De Swaef  Bruno M. Goddeeris  Nancy Nevejan 《Aquaculture International》2015,23(6):1539-1552

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Modelling the interaction between a pest (Aculops lycopersici), two predators (Pronematus ubiquitus and Macrolophus pygmaeus) and climate variables: a 3-year greenhouse study in a tomato crop     

Rob Moerkens  Dominiek Vangansbeke  Marcus V. A. Duarte  Stijn Bellinkx  Elana De Roo  Juliette Pijnakker  Felix Wäckers 《Pest management science》2023,79(12):5362-5373

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Safety of a modified-live combination vaccine against respiratory and reproductive diseases in pregnant cows     

Ellsworth MA  Brown MJ  Fergen BJ  Ficken MD  Tucker CM  Bierman P  TerHune TN 《Veterinary therapeutics : research in applied veterinary medicine》2003,4(2):120-127

A combination vaccine (Bovi-Shield FP4 + L5, Pfizer Animal Health) containing modified-live virus (MLV) components against bovine herpesvirus-1 (BHV-1), bovine viral diarrhea virus BVDV), parainfluenza virus-3 (PI3), bovine respiratory syncytial virus (BRSV), and inactivated cultures of Leptospira canicola, grippotyphosa, hardjo, icterohaemorrhagiae, and pomona was evaluated for safety in pregnant beef and dairy animals. Heifers vaccinated prebreeding with the minimum immunizing dose (lowest antigen level initiating immunizing effects) of the vaccine's MLV BHV-1 or BVDV components and during pregnancy (approximately 200 days of gestation) with vaccine containing 10x doses of the same BHV-1 and BVDV components delivered live, healthy calves that were determined to be serologically negative (titer less than 1:2) for neutralizing antibodies to BHV-1 and BVDV prior to nursing. Additionally, in three field safety studies, previously vaccinated cows and heifers that received a field dose (vaccine containing antigen levels required for commercial sale of the MLV combination vaccine during either the first, second, or third trimester of pregnancy had abortion rates similar to those of pregnant cows and heifers vaccinated during the same stage of pregnancy with sterile water diluent.  相似文献   

Characterization of a feline homologue of the alphaE integrin subunit (CD103) reveals high specificity for intra-epithelial lymphocytes     

Woo JC  Roccabianca P  van Stijn A  Moore PF 《Veterinary immunology and immunopathology》2002,85(1-2):9-22

The characteristics of a feline homologue of the alphaE integrin (CD103), defined by two murine monoclonal antibodies, Fe7.1B8 (IgG1) and Fe7.2D8 (IgG1), are described. These antibodies recognized 75% of intra-epithelial (range 59-88%) and 40% of lamina proprial (range 28-46%) T cells of the intestinal mucosal tissue of the small intestine in contrast with approximately 2% of peripheral blood lymphocytes. Both antibodies immunoprecipitated a 180 kDa protein from biotinylated feline intra-epithelial mucosal leukocytes consistent with the alphaE integrin subunit in conjunction with a 120 kDa protein consistent with the beta7 subunit. The nucleotide sequence of feline alphaE integrin, generated from molecular cloning of the feline alphaE encoding cDNA, is also reported. This feline molecule shares 72% sequence homology with human and 69% homology with murine and rat counterparts. Homology includes the presence of an X (extra) domain, that appears unique to alphaE molecules as described for human, rat and mouse, as well as areas of homology common to other alpha integrins. Of note is a typical I (inserted) domain, the presence of seven repeat regions, and highly conserved sequences in the cytoplasmic tail. Transfection studies demonstrated that both antibodies recognized an extracellular component which encompassed the X and I domains of the cloned alphaE integrin subunit. These studies demonstrate that the pattern of tissue distribution, biochemical characteristics, and cDNA sequence of the feline alphaE integrin subunit are largely similar to that described for other species.  相似文献   

Estimating the impacts of water pricing on smallholder irrigators in North West Province, South Africa   总被引：1，自引：0，他引：1  

Stijn Speelman  Jeroen Buysse  Stefano Farolfi  Aymen Frija  Marijke D&#x;Haese  Luc D&#x;Haese 《Agricultural Water Management》2009,96(11):1560-1566

Worldwide growing water scarcity has increased the call for economic instruments to stimulate rational water use in agriculture. Furthermore, cost-recovery is now widely accepted as a cornerstone of sustainable water management. In many developing countries, where agricultural water use is often still subsidised, water pricing policies are developed for allocating water efficiently and achieving sustainability of water systems. However, the impacts of water pricing policies on irrigation water use and on farm production systems is mostly unknown. We introduce an innovative two-stage methodology that allows estimating these effects at farm level. Applying the method to small-scale irrigators in South Africa, we show that water demand is quite responsive even to small changes in water price. In addition, the introduction of a water price significantly decreases farm profit. This appears to be a problem primarily for the poorer farmers.  相似文献   

Rapid late Pleistocene incision of Atlantic passive-margin river gorges     

Reusser LJ  Bierman PR  Pavich MJ  Zen EA  Larsen J  Finkel R 《Science (New York, N.Y.)》2004,305(5683):499-502

The direct and secondary effects of rapidly changing climate caused large rivers draining the Atlantic passive margin to incise quickly into bedrock beginning about 35,000 years ago. Measured in samples from bedrock fluvial terraces, 10-beryllium shows that both the Susquehanna and Potomac Rivers incised 10- to 20-meter-deep gorges along steep, convex lower reaches during the last glacial cycle. This short-lived pulse of unusually rapid down-cutting ended by 13,000 to 14,000 years ago. The timing and rate of downcutting are similar on the glaciated Susquehanna and unglaciated Potomac Rivers, indicating that regional changes, not simply glacial meltwater, initiated incision.  相似文献   

Apple mealiness detection using fluorescence and self-organising maps     

Dimitrios Moshou  Stijn Wahlen  Reto Strasser  Ann Schenk  Herman Ramon 《Computers and Electronics in Agriculture》2003,40(1-3):103

The chlorophyll fluorescence kinetics of ‘Jonagold’ and ‘Cox’ apples, stored under different conditions to induce mealiness, were measured. Three different storage conditions were considered causing three mealiness levels: not mealy, moderately and strongly mealy. Also destructive measurements of the texture (firmness, hardness, juice content and soluble solids content) were done. Classification into different mealiness levels based on the fluorescence measurements was more performant than a classification based on the destructive measurements. To estimate the mealiness level in a non-destructive way from the fluorescence features, a number of different classifiers were constructed. Quadratic discriminants and supervised and unsupervised neural networks were tested and compared. The self-organising map gives promising results when compared with the multi-layer perceptrons and quadratic discriminant analysis. The different advantages of the constructed classifiers suggest that fluorescence can be used in an automatic sorting line to assess certain types of mealiness.  相似文献   

Influence of P-glycoprotein modulation on plasma concentrations and pharmacokinetics of orally administered prednisolone in dogs     

Van der Heyden S  Croubels S  Gadeyne C  Ducatelle R  Daminet S  Murua Escobar H  Sterenczak K  Polis I  Schauvliege S  Hesta M  Chiers K 《American journal of veterinary research》2012,73(6):900-907

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Contraceptive effect and potential side-effects of deslorelin acetate implants in rats (Rattus norvegicus): Preliminary observations     

Claire Grosset  Stijn Peters  Franck Peron  Jo?lle Figuéra  Christelle Navarro 《Canadian journal of veterinary research》2012,76(3):209-214

During the last ten years, numerous species have been treated with deslorelin implants to induce contraception. The aims of the study were 1) to assess contraceptive efficacy of 4.7 mg subcutaneous deslorelin implants in rats, 2) to determine the latency of contraceptive effect, and 3) to determine potential side effects. Three experimental females were implanted and their estrous cycle was studied by vaginal smear. Two weeks after implantation, a male whose fertility was previously assessed with a control female, was introduced into their cage. No female conceived during the 4 mo following implantation. Additionally, 38 pet rats were recruited from clients in practice to test for potential side effects, including 6 males and 32 females with a mean age of 14 mo. Local reaction and transient weight gain during the first 2 wk, as well as behavioral changes were recorded. According to this pilot study, deslorelin implant could be used as a contraceptive method in female rats. The latency period is about 2 wk. Nevertheless, it might be possible to refine the treatment further using hormonal measurements. The duration of contraceptive effect is to be determined in an upcoming study.  相似文献   

Left abomasal displacement between the uterus and rumen during bovine twin pregnancy     

Bart Pardon  Geert Vertenten  Pieter Cornillie  Stijn Schauvliege  Frank Gasthuys  Gunther van Loon  Piet Deprez 《Journal of veterinary science (Suw?n-si, Korea)》2012,13(4):437-440

Here, we describe two cases of left displaced abomasum (LDA) in Holstein cattle at 6 and 9 months of twin gestation. Clinical examination revealed signs of proximal ileus with marked abdominal distension, but no ping sounds. An unusually high position of the gravid uterine horn on the left side was observed with ultrasound. Left exploratory laparotomy confirmed that the abomasum was displaced to the left and entrapped between the rumen and twin gravid uterine horn. A left surgical approach was necessary to correct the condition. Both animals recovered and gave birth to healthy twins. The present cases indicate that the subomental position of a heavy twin gravid uterine horn is a possible mechanical cause of LDA.  相似文献