Production Characteristics and Size Variability of Channel Catfish Reared in Cages and Open Ponds1     

Thomas E. Schwedler  Joe R. Tomasso  John A. Collier 《Journal of the World Aquaculture Society》1989,20(3):158-161

Production characteristics of channel catfish (Ictalurus punctatus) reared in cages and open ponds were compared. Fish reared in open ponds had significantly better growth and food conversion ratios than fish reared in cages. Cages and open ponds stocked with fish which were closely graded in size produced fish with less size variability at harvest compared to ponds and cages stocked with nongraded and coarsely graded fish. The decrease in size variability at harvest was reflected in a greater proportion of marketable fish.  相似文献   

Pancreatic Polypeptide and Insulin-Secreting Tumor in a Dog With Duodenal Ulcers and Hypertrophic Gastritis     

Carole A. Zerbe DVM  MS    Timothy R. Boosinger DVM  PhD    J. H. Grabau DVM    J. M. Pletcher DVM  Thomas M. O''Dorisio MD 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1989,3(3):178-182

A 7-year-old spayed female Cocker Spaniel was hospitalized with a history of chronic vomiting, anorexia, and weight loss. Laboratory abnormalities included leukocytosis, metabolic alkalosis, hypoglycemia, hypoproteinemia, and hyperinsulinemia. Gastroscopy and ultrasonography revealed multiple gastric masses and a possible pancreatic mass, respectively. Examination of tissues obtained at necropsy showed a pancreatic adenocarcinoma with hepatic metastasis, gastric hypertrophy, and multiple duodenal ulcers. Immunocytochemical staining of the neoplasia was positive for pancreatic polypeptide (PP) and insulin and negative for gastrin, calcitonin, adrenocorticotropic hormone (ACTH), serotonin, L-enkephalin, chromagranin, glucagon, and somatostatin. Subsequent serum gastrin and PP assays showed a fasting hypergastrinemia with a normal response of gastrin to provocative testing and extremely increased PP values. The high PP values may have resulted in the vomiting and gastrointestinal ulceration. A PP-secreting tumor has not previously been reported in the dog.  相似文献   

Ontogeny and function of the pituitary-gonadal axis during fetal development in sheep     

AN Brooks  GB Thomas 《Reproduction in domestic animals》1995,30(4):158-162

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Salmonella paratyphi B infection in dairy cows. II. Investigation of an active carrier     

G W Thomas  J F Harbourne 《The Veterinary record》1972,91(6):148-150

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Benign enzootic paresis (Talfan's disease) of pigs     

H Keller 《Schweizer Archiv für Tierheilkunde》1969,111(4):175-180

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Sequelae of neurectomy of the volar nerves in horses: neuromas, regeneration, and reinnervation of nerve stumps     

H Keller 《Berliner und Münchener tier?rztliche Wochenschrift》1969,82(13):244-247

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Transmissible gastroenteritis virus: plaques and a plaque neutralization test.          下载免费PDF全文

F C Thomas  G C Dulac 《Canadian journal of veterinary research》1976,40(2):171-174

A plaquing system and plaque neutralization test in porcine thyroid cells were used to study different transmissible gastroenteritis isolates and hemagglutinating encephalomyelitis virus. Among transmissible gastroenteritis virus isolates, plaque size varied considerably and mixed size ranges sometimes occurred. The most recently isolated viruses produced smaller plaques than the laboratory viruses or hemagglutinating encephalomyelitis virus. All transmissible gastroenteritis virus isolates reacted in the plaque neutralization test with a transmissible gastroenteritis virus antiserum which showed no activity against hemagglutinating encephalomyelitis virus. Plaque neutralization results both from experimentally infected pigs and following a field outbreak demonstrated the reliability of this test and its greater sensitivity than the conventional tube test.  相似文献   

The agricultural foundations of civilization     

Thomas Wessel 《Agriculture and Human Values》1984,1(2):9-12

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ADVANCE NOTES ON RESEARCH     

P. T. Thomas 《Grass and Forage Science》1961,16(4):276-277

Tilley et al . (1) have clearly demonstrated that their rumen liquor and pepsin procedure for the determination of digestibility of herbage is useful and precise. The method has, however, the disadvantage that the equipment required for the centrifugation stages is relatively expensive and, moreover, when using one centrifuge only the procedure is somewhat tedious. The method outlined below completely eliminates centrifugation; the rumen-liquor stage is terminated by acidification and the residues from the pepsin stage is recovered by filtration, using a filter aid. Digestible dry matter or digestible organic matter may be determined; results for the former estimation on thirteen samples already examined at Hurley have given satisfactory results.  相似文献   

SONOGRAPHY OF THE EQUINE PALMAR METACARPAL SOFT TISSUES   总被引：2，自引：0，他引：2  

John W.  Pharr  DVM  MS  Thomas G.  Nyland  DVM 《Veterinary radiology & ultrasound》1984,25(6):265-273

It was hypothesized that ultrasonography may be a sensitive method for identifying pathologic changes in the tendons and ligaments of the palmar metacarpus of the horse. The palmar meta-carpi of equine cadavers and live horses were examined sonographically. The advantages and disadvantages of various ultrasound scanning techniques and the normal appearance of longitudinal and transverse palmar metacarpal sonograms are described.  相似文献