Palaeoparasitological analysis of guinea pig mummies of the Chiribaya culture,Moquegua Valley,Peru     

Dittmar de la Cruz K  Ribbeck R  Daugschies A 《Berliner und Münchener tier?rztliche Wochenschrift》2003,116(1-2):45-49

During several excavations of archeological sites in the Moquegua Valley, Southern Peru, various guinea pig mummies (Cavia aperea f. porcellus) have been discovered. They belong to the Chiribaya Culture (900-1100 AD). The outstanding preservation of the mummified animals gave rise to the idea of a paleoparasitological analysis. In the fur, numerous well preserved ectoparasites (lice, fleas, mites) could be recovered. Generally, ectoparasite remains are rarely found among archeological material. This is the first account of an extensive ectoparasitological analysis of animal mummies in Peru. A modified technique for recovery and preservation of the ectoparasites has been developed.  相似文献   

Competition for food between Eurasian perch (Perca fluviatilis L.) and ruffe (Gymnocephalus cernuus [L.]) over different substrate types   总被引：1，自引：1，他引：0  

A. Dieterich  D. Baumgärtner  R. Eckmann 《Ecology of Freshwater Fish》2004,13(4):236-244

Abstract –  Food consumption by Eurasian perch ( Perca fluviatilis L.) and ruffe ( Gymnocephalus cernuus [L.]) was studied in single and mixed-species treatments in the laboratory, where alternative food resources, chironomids and zooplankton, were offered simultaneously. The effects of structural complexity, which was represented by substrate grain size, and of feeding level on food consumption were analysed. Across all experiments, the outcome of competition between perch and ruffe depended on food abundance and on the structural complexity of the environment. Perch and ruffe both changed their food consumption in the presence of a heterospecific competitor. With high food supply, perch consumed more benthic food than ruffe. With low food supply, the consumption of perch decreased strongly, while that of ruffe remained high on fine sediment. Under all conditions tested, the mechanism of competition appeared to be of interference rather than of exploitative nature. It is suggested that with decreasing lake productivity caused by re-oligotrophication, habitat shifts of both species will occur, which will alleviate interspecific competition. Ruffe will forage over fine sediment and perch over coarse sediment, whereby both species will achieve the highest foraging efficiency under conditions of low food supply.  相似文献   

Synthetisches Denken in der Forstwirtschaft und Forstwissenschaft     

V. Dieterich 《Forstwissenschaftliches Centralblatt》1960,79(7-8):207-220

Ohne Zusammenfassung  相似文献   

Bericht über die XXIV. Versammlung des Württ. Forstvereins (12.–14. Juni 1911)     

Forstamtmann Dr. Dieterich 《European Journal of Forest Research》1911,33(12):643-652

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Ertragskundliche und betriebswirtschaftliche Grundlagen einer Waldbodensch?tzung     

B. Dieterich 《Forstwissenschaftliches Centralblatt》1939,61(11):343-354

Ohne Zusammenfassung  相似文献   

Waldgesinnung und forstwirtschaftliches Wertdenken     

V. Dieterich 《European Journal of Forest Research》1968,87(1):65-74

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III. Buchbesprechungen     

Dieterich  Assmann  Huber  Rohmeder und Attenberger 《Forstwissenschaftliches Centralblatt》1953,72(5-6):184-192

Ohne Zusammenfassung  相似文献   

INTER‐ AND INTRAFRACTION MOTION FOR STEREOTACTIC RADIOSURGERY IN DOGS AND CATS USING A MODIFIED BRAINLAB FRAMELESS STEREOTACTIC MASK SYSTEM          下载免费PDF全文

Sonja Dieterich  Allison Zwingenberger  Katherine Hansen  Isabella Pfeiffer  Alain Théon  Michael S. Kent 《Veterinary radiology & ultrasound》2015,56(5):563-569

Precise and accurate patient positioning is necessary when doing stereotactic radiosurgery (SRS) to ensure adequate dosing to the tumor and sparing of normal tissues. This prospective cross‐sectional study aimed to assess feasibility of a commercially available modified frameless SRS positioning system for use in veterinary radiotherapy patients with brain tumors. Fifty‐one dogs and 12 cats were enrolled. Baseline and verification CT images were acquired. The verification CT images from 32 dogs and five cats had sufficient images for fusion to baseline CT images. A rigid box‐based fusion was performed to determine interfraction motion. Forty‐eight dogs and 11 cats were assessed for intrafraction motion by cine CT. Seventy percent of dogs and 60% of cats had interfraction 3D vector translational shifts >1 mm, with mean values of 1.9 mm in dogs, and 1.8 mm in cats. In dogs muscle wasting was weakly correlated with translational shifts. The maximum angular interfraction motion observed was 6.3° (roll), 3.5° (pitch), and 3.3° (yaw). There was no correlation between angular interfraction motion and weight, brachycephaly, or muscle wasting. Fifty‐seven percent of dogs and 50% of cats had respiration‐related intrafraction motion. Of these, 4.5% of dogs and 10% of cats had intrafraction motion >1 mm. This study demonstrates the modified Brainlab system is feasible for SRS in dogs and cats. The smaller cranial size and difference in anatomy increases setup uncertainty in some animals beyond limits usually accepted in SRS. Image‐guided positioning is recommended to achieve clinically acceptable setup accuracy (<1 mm) for SRS.  相似文献   

Gegens?tze technischen und wirtschaftlichen Denkens im Forstwesen     

V. Dieterich 《Forstwissenschaftliches Centralblatt》1963,82(1-2):1-12

Ohne Zusammenfassung  相似文献   

    

Dieterich 《Forstwissenschaftliches Centralblatt》1910,32(4):220-228

Ohne ZusammenfassungDem Berichterstatter stand das Protokoll der Versammlung und das Manuskript des Herrn Referenten zur Verfügung.  相似文献