Invalidity of three Palaearctic species of Triaenophorus tapeworms (Cestoda: Pseudophyllidea): evidence from morphometric analysis of scolex hooks     

Kuchta R  Vlcková R  Poddubnaya LG  Gustinelli A  Dzika E  Scholz T 《Folia parasitologica》2007,54(1):34-42

A comparative study of the scolex hook morphology of five species of tapeworms of the genus Triaenophorus Rudolphi, 1793 (Cestoda: Pseudophyllidea), parasites of pikes (Esox lucius L. and E. reichertii Dybowski) in the Palaearctic Region, was carried out. Measurements of scolex hooks of 81 plerocercoids and 492 adults from different hosts and regions were compared using basic statistics and forward stepwise linear discriminant analysis. The shape of the scolex and that of tridental hooks were found to be suitable only for differentiation of the taxa with a similar shape of hooks, i.e. Triaenophorus nodulosus (Pallas, 1781) from T. amurensis Kuperman, 1968, and T. crassus Forel, 1868 from T. meridionalis Kuperman, 1968 and T. orientalis Kuperman, 1968, respectively. In contrast, discriminant analysis did not enable reliable separation of specimens of individual taxa of these two morphological groups due to high intraspecific variability and overlaps between species. This was reflected in low classification efficiencies (average 83%) of all species of the T. crassus group, whereas all T. amurensis specimens were misidentified as T. nodulosus. The new data also considerably enlarge (up to twofold) the size range of the species described by Kuperman in 1968, which invalidates suitability of the most important discriminant characteristic, the width of the basal plate, for delimitation of Triaenophorus species. Based on the present data, all Kuperman's taxa are considered to represent only distinct geographical populations of T. nodulosus and T. crassus. As a result, T. anmurensis is synonymized with T. nodulosus, whereas T. orientalis is considered to be a synonym of T. crassus. Previous synonymisation of T. ineridionalis with T. crassus, first proposed by Dubinina (1987), is also accepted.  相似文献   

Oestrogen and Progesterone Receptor Gene Expression in Canine Oocytes and Cumulus Cells Throughout the Oestrous Cycle     

JSA Gonçalves  CI Vannucchi  FC Braga  FF Paula-Lopes  MP Milazzotto  MEOA Assumpção  JA Visintin 《Reproduction in domestic animals》2009,44(S2):239-242

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What constitutes freedom from disease in livestock?     

FC BALDOCK 《Australian veterinary journal》1998,76(8):544-545

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The first finding of the tapeworm Proteocephalus macrocephalus (Creplin, 1825) (Cestoda: Proteocephalidae) in Czechoslovakia     

T Scholz  T Kepr 《Folia parasitologica》1988,35(2):111-112

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评估猪亚临床回肠炎在肥育阶段导致经济损失的试验     

Scholz A M  朱书 《养猪》2008,(6)

回肠炎是生长肥育猪的一种常见病,由胞内劳森菌引起,能导致猪饲料转化率降低、生长迟缓、腹泻,并可造成猪肥育晚期和后备母猪猝死或血痢。据Hardge等(2005)报道,欧洲有95%以上的猪群  相似文献   

Ecological Restoration of Polluted Plain Rivers Within the Haihe River Basin in China   总被引：1，自引：0，他引：1  

W. Wang  X. Q. Tang  S. L. Huang  S. H. Zhang  C. Lin  D. W. Liu  H. J. Che  Q. Yang  Miklas Scholz 《Water, air, and soil pollution》2010,211(1-4):341-357

The Haihe River basin is located in the north of China and has an area of 318,000 km². The region is politically important and economically advanced. For example, the Haihe River basin sustains a population of more than 120 million and generates a gross domestic production of approximately 2,600 billion Chinese Yuan. The ecological health of plain rivers within the Haihe River basin of China is questionable because of severe water shortages, considerable water, soil and air pollution, and the destruction of the natural river morphologies. It is therefore necessary to establish a generic and theoretical restoration methodology to guide river ecological restoration efforts in the future. Thirteen methodologies and technologies were selected from an existing suit of ecosystem restoration techniques currently applied to the Haihe River catchment. These technologies were further divided into three types: water quantity adjustment, water purification, and habitat improvement. The most suitable ecological restoration techniques were selected as a function of all three types. However, direct methods of addressing water quantity and quality problems were identified as critical for the success of future restoration efforts. Examples of the application of the conceptual ecological restoration model for the representative plain rivers Beiyunhe, Yongding and Wei, all located within the Haihe River Basin, are also assessed. The conceptual model provides practical solutions to pollution problems, is generic in nature, and could therefore be applied to other polluted watercourses in densely populated regions in the developed and developing world.  相似文献   

Nutrient Accumulation in Typha latifolia L. and Sediment of a Representative Integrated Constructed Wetland     

Atif Mustafa  Miklas Scholz 《Water, air, and soil pollution》2011,219(1-4):329-341

This paper investigates the role of plants and sediment in removing nutrients from wastewater being treated in a representative integrated constructed wetland (ICW). It discusses the role of plants and sediment in removing nutrients from an ICW treating agricultural wastewater for more than 7 years. More nitrogen and phosphorus were stored in wetland soils and sediments than in plants. The first cell had the highest depth of sediment accumulation (45 cm). Over the 7-year operation period, the accretion rate was approximately 6.4 cm/year. With respect to maintenance, desludging of the first wetland cell of the ICW system appears to be necessary in 2011. An average of 10,000 m³ per year of wastewater entered the ICW. Approximately 74% (780 kg) of the phosphorus and 52% (5,175 kg) of the nitrogen that entered the wetland system was stored in the wetland soils and sediments. Plants stored a small fraction of nutrients compared to soils (<1% for both nitrogen and phosphorus). This study demonstrates that soils within a mature wetland system are an important and sustainable nutrient storage component.  相似文献   

Current findings of veterinary counseling on feeding. 5. Errors in ration planning for dairy cows in herds with health problems (a report of experiences)     

W Drochner  E Heck?tter  H Scholz 《DTW. Deutsche tier?rztliche Wochenschrift》1984,91(9):324-330

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Pathogenesis of hypomagnesemic tetany. IV. Effect of parenteral administration of phosphorus and citric acid in sheep with various supply of Mg     

H Scholz  H Meyer 《DTW. Deutsche tier?rztliche Wochenschrift》1973,80(23):545-548

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Hyperthermia in the rabbit. II. Studies on influencing respiration with exogenic hyperthermia]     

M Nichelmann  R Martin  J Scholz  L Lyhs 《Archiv fuer experimentelle veterinaermedizin》1975,29(2):241-251

Rectal temperature, respiratory rate, arterial and venous pH and arterial and venous pCO2 were recorded at intervals of 15-30 minutes in female broiler rabbits exposed an environmental temperature of 35 degrees C, until they died. Respiratory rate and blood pH rose, and pCO2 fell, until a rectal temperature of 42 degrees C was reached. Upon further increase in rectal temperature the respiratory rate and pH began to fall, while pCO2 began to rise. The rabbits died when rectal temperature reached 43 degrees C. Features of respiratory function peculiar to the rabbit were discussed.  相似文献