Rats and the placement of rodenticide baits for their eradication on indoor livestock farms

The frequency and distribution of specific structural farm elements in relation to the occurrence of rats was investigated on 24 German livestock farms, 18 in Lower Saxony and 6 in the Münsterland area. Using the interactive control programme BayTool® we also examined whether the allocation of baitingpoints to these elements would result in complete rat eradication. Standardized rat control measures were applied with baiting-points allocated to six specific structural elements on these farms, and the feeding activity of rats was recorded for each of these elements and their position. Rat activity mainly occurred at five specific structural elements. Farms with rat infestations held a higher number of the element ‘old materials’ than rat-free farms. The allocation of rodenticide baiting-points to five specific structural elements is a precondition for complete rat eradication. Most rat feeding activity was observed at baiting-points allocated to ‘old materials’, ‘stacks’ (of construction materials), and ‘livestock’. Rat feeding activity was predominantly located outdoors at ‘old materials’ and ‘stacks’. The stringent allocation of baiting-points to six specific structural elements is a reliable means of rat eradication and rat monitoring on livestock farms. As most rat activity on livestock farms is expected outdoors a rodenticide must be chosen that only poses low secondary poisoning hazards

Automatic and permanent rodent-monitoring - a proper method to evaluate rodenticide effects?

Fuelling, O., Klemann, N., Endepols, S

Physiological and Morphological Characterization of Organotypic Cocultures of the Chick Forebrain Area MNH and its Main Input Area DMA/DMP

Cocultures of the learning-relevant forebrain region mediorostrai neostriatum and hyperstriatum ventrale (MNH) and its main glutamatergic input area nucleus dorsomedialis anterior thalami/posterior thalami were morphologically and physiologically characterized. Synaptic contacts of thalamic fibers were lightand electron-microscopically detected on MNH neurons by applying the fluorescence tracer DiI-C18(3) into the thalamus part of the coculture. Most thalamic synapses on MNH neurons were symmetric and located on dendritic shafts, but no correlation between Gray-type ultrastructure and dendritic localization was found. Using intraceilular current clamp recordings, we found that the electrophysiological properties, such as input resistance, time constant, action potential threshold, amplitude, and duration of MNH neurons, remain stable for over 30 days in vitro. Pharmacological blockade experiments revealed glutamate as the main neurotransmitter of thalamic synapses on MNH neurons, which were also found on inhibitory neurons. High frequency stimulation of thalamic inputs evoked synaptic potentiation in 22% of MNH neurons. The results indicate that DMA/DMP-MNH cocultures, which can be maintained under stable conditions for at least 4 weeks, provide an attractive in vitro model for investigating synaptic plasticity in the avian brain

Characteristics of the local distribution of the Y139C resistance gene in Norway rats (Rattus norvegicus

Klemann, N., Esther, A., Endepols, S

Field trials to assess resistance to warfarin and difenacoum of house mice in relation to the occurrence of variants in the vkorc1-gene before and after the treatments

Endepols, S., Klemann, N., Song, Y., Kohn, M.H

Improving distributed collaboration at Porsche Engineering Services GmbH through the application of the EDiT Method

To support development teams with their individual challenges of distributed collaboration in product development, the EDiT method is being developed. This paper contributes to the continuous validation of the EDiT method by a field study at the process team of Porsche Engineering Services GmbH to support the successful transfer into practice. The validation is based on validation by application, validation by evaluation of the contribution to success, and validation by comparison of the requirements. The contribution of the EDiT method could be proven by different measurement criteria, e.g. reducing the average number of days to finish a task by a remarkable amount

Genospecies diversity of Lyme disease spirochetes in rodent reservoirs.

To determine whether particular Borrelia burgdorferi s.l. genospecies associate solely with rodent reservoir hosts, we compared the genospecies prevalence in questing nymphal Ixodes ticks with that in xenodiagnostic ticks that had fed as larvae on rodents captured in the same site. No genospecies was more prevalent in rodent-fed ticks than in questing ticks. The three main spirochete genospecies, therefore, share common rodent hosts

Перспективы нефтегазоносности нижнеюрских резервуаров на основе комплексной интерпретации данных геотермии и бурения в Нюрольской мегавпадине (Томская область)

Объектом исследования является нефтематеринская тогурская свита и резервуары нижнеюрского нефтегазоносного комплекса. Цель работы – выполнение оценки перспектив нефтегазоносности нижнеюрских отложений Нюрольской мегавпадины на базе палеотектонических реконструкций и палеотемпературного моделирования, картирование плотности первично-аккумулированных тогурских нефтей, определение первоочередных объектов для постановки геолого-разведочных работ. Работа выполнена на основе геолого-геофизических данных, полученных при бурении глубоких скважин и лабораторных исследований керна с использованием публикаций по теме исследования и фондовым материалам.Object of research is the oil source togur suit and Lower Jurassic oil and gas oil and gas bearing complex. Work objective is to estimate lower Jurassic oil and gas potential of Nurolka mega depression using paleotectonic reconstructions and modeling, mapping of initially accumulated oil resources containing in togurskaya suit, determining premium objects for geological exploration. During research we analyzed publications and library materials. Geological and geophysical data obtained by well drilling and core analysis were also systematized and used in that work