Fixed‐time Insemination in Pasture‐based Medium‐sized Dairy Operations of Northern Germany and an Attempt to Replace GnRH by hCG          下载免费PDF全文

D Marthold  J Detterer  U Koenig von Borstel  M Gauly  W Holtz 《Reproduction in domestic animals》2016,51(1):85-90

A field study was conducted aimed at (i) evaluating the practicability of a fixed‐time insemination regime for medium‐sized dairy operations of north‐western Germany, representative for many regions of Central Europe and (ii) substituting hCG for GnRH as ovulation‐inducing agent at the end of a presynch or ovsynch protocol in an attempt to reduce the incidence of premature luteal regression. Cows of two herds synchronized by presynch and two herds synchronized by ovsynch protocol were randomly allotted to three subgroups; in one group ovulation was induced by the GnRH analog buserelin, in another by hCG, whereas a third group remained untreated. The synchronized groups were fixed‐time inseminated; the untreated group bred to observed oestrus. Relative to untreated herd mates, pregnancy rate in cows subjected to a presynch protocol with buserelin as ovulation‐inducing agent was 74%; for hCG it was 60%. In cows subjected to an ovsynch protocol, the corresponding relative pregnancy rates reached 138% in the case of buserelin and 95% in the case of hCG. Average service interval was shortened by 1 week in the presynch and delayed by 2 weeks in the ovsynch group. It may be concluded that fixed‐time insemination of cows synchronized via ovsynch protocol with buserelin as ovulation‐inducing agent is practicable and may help improve efficiency and reduce the work load involved with herd management in medium‐sized dairy operations. The substitution of hCG for buserelin was found to be not advisable.  相似文献   

A new technique for insertion of esophagostomy tubes in cats     

von Werthern CJ  Wess G 《Journal of the American Animal Hospital Association》2001,37(2):140-144

A new percutaneous insertion technique for esophageal feeding tubes in cats is presented. The technique has been successfully applied in 12 feline patients. The placement technique is relatively simple, takes approximately five minutes to perform, and requires a scalpel blade, a curved hemostat, and an applicator for the insertion of the feeding tube. In contrast to other esophageal tube placement techniques, the tube is inserted into the definitive aboral position in a one-step procedure. Because of its shoehorn shape, the applicator allows the tube to be inserted into the esophagus safely and precisely. Placement of the tube in the midcervical area does not interfere with the function of the pharynx and avoids having the animal irritated by the presence of the tube. The chosen diameter of the tube is large enough to permit feeding of diluted, blended, commercial canned food. For the patients of this study, feeding was started after recovery from anesthesia, and tubes were removed without complications once the animals had started to eat voluntarily.  相似文献   

Digalacturonates from pectin degradation induce tissue responses against potato soft rot     

Weber J.  Olsen O.  Wegener C.  von Wettstein D. 《Physiological and Molecular Plant Pathology》1996,48(6):389-401

The pathogenicity of the bacteriumErwinia carotovorasubsp.atroseptica, which causes potato soft rot, is triggered by short oligogalacturonates released by enzymic degradation of plant cell wall pectin. In the first stage unsaturated digalacturonate (uDG), produced by the action of pectate lyases, is degraded by oligogalacturonide lyase (OGL) to keto-deoxyuronate (DKI). The OGL encoding gene fromE. carotovoraand the corresponding recombinant enzyme were characterized. Measuring the changes in plant cell viability and tissue maceration during soft rot pathogenesis in tissue slices of sprouting potato tubers, it was observed that exposure to uDG and DKI, produced by recombinant OGL, killed up to 30% of the plant cells over a period of 16h. This protected the tissue against maceration byE. carotovorasubsp.atroseptica. Endogenous OGL activity was detected in extracts from sprouting tubers where it may be involved in the conversion of uDG into cell toxic compounds. The results indicate that an additional function of small, diffusable digalacturonates is to induce plant cell death during the rotting process, thus contributing to defence reactions againstE. carotovorasubsp.atroseptica.  相似文献   

Relation between erythrocyte sedimentation rate and erythrocyte count, fibrinogen content and viscosity of plasma in the individual (long-term study of 3 dogs)     

R Pfeil 《Berliner und Münchener tier?rztliche Wochenschrift》1986,99(11):370-373

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The development of Marek's disease in chickens following the cytotoxic effects of cyclophosphamide on the lymphatic organs]     

H C L?liger  D von dem Hagen 《DTW. Deutsche tier?rztliche Wochenschrift》1977,84(3):100-104

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Differenzierung von Feldstämmen des Hühner-Bronchitisvirus (IBV)     

Vicco von Bülow 《Zoonoses and public health》1969,16(5):414-427

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Studies on trypanosome infestation of tsetse flies (Gl. tachinoides Westwood and Gl. morsitans submorsitans Newstead) in the Republic of Niger and its seasonal variations     

P von Sivers  U Spielberger 《Berliner und Münchener tier?rztliche Wochenschrift》1972,85(20):392-394

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Controversies concering the anatomy of bursa cloacae, papilla vaginalis and phallus femininus in the chicken     

F Preuss  D Berens von Rautenfeld 《Berliner und Münchener tier?rztliche Wochenschrift》1974,87(23):456-458

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Thromboplastic activity of brain extracts from various species in normal plasma and in congenital factor VII deficient plasma from dogs     

H von Schaewen 《Berliner und Münchener tier?rztliche Wochenschrift》1972,85(8):149-152

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Gegenwartsprobleme im forstlichen Pflanzgartenbetrieb     

A. von Schönborn 《European Journal of Forest Research》1964,83(11-12):350-358

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