Polyculture of the Giant Malaysian Prawn and the Golden Shiner in Southwestern Louisiana1     

Gregory Scott  W. Guthrie Perry  James W. Avault 《Journal of the World Aquaculture Society》1988,19(3):118-126

Juvenile prawns (Macrobrachium rosenbergii) were stocked at 37,050/ha and golden shiner (Noremigonus crysoleucas) fry at 321,100/ha into 16 earthen ponds at Rockefeller Wildlife Refuge, Grand Chenier, Louisiana. Four replicated treatments were tested: fed prawn monoculture, fed shiner monoculture, fed prawn and fed shiner polyculture, and unfed prawn fed shiner polyculture. The study lasted 149 days. There were no significant differences in growth between prawns fed in monoculture and prawns fed in polyculture (P > 0.05). However, fed prawns grew significantly larger (P < 0.05) than unfed prawns. Prawn survival in all treatments combined averaged 63%. Survival was significantly higher (P < 0.05) for fed prawns than for unfed prawns. Prawn yields averaged 533 kg/ha, when all treatments were combined. Yield was significantly higher (P < 0.05) for prawns grown with shiners and for prawns that received supplemental feed. Growth was significantly higher (P < 0.05) for shiners grown with fed prawns than for shiners grown with unfed prawns. Shiner survival averaged 33% and was significantly higher (P < 0.05) in monoculture than in polyculture. Yield for all ponds averaged 392 kg/ha, with no significant differences between treatments (P > 0.05).  相似文献   

Evaluation of the efficacy of d-penicillamine and trientine as copper chelators using an in vitro technique involving ovine red blood cells.     

C J Botha  T W Naude  G E Swan  A J Guthrie 《The Onderstepoort journal of veterinary research》1992,59(3):191-195

An in vitro technique for haemolysing ovine red blood cells with copper sulphate was standardized to induce c 50% haemolysis with 0.5 mM CuSO4 after incubation for 14 h at 38 degrees C. This technique was then applied to test the efficacy of trientine and d-penicillamine in preventing haemolysis. Trientine concentrations of 0.5; 1.0 and 1.5 mM were found to be the most effective (P < 0.05) in reducing copper-induced haemolysis. One and 1.5 mM concentrations of d-penicillamine were also effective (P < 0.05), but in this experiment a 0.5 mM concentration failed to protect the erythrocytes.  相似文献   

Gametic disequilibria between virulence genes in barley powdery mildew populations in relation to selection and recombination. I. Models     

HANNE øSTERGÅRD  MOGENS S. HOVMøLLER 《Plant pathology》1991,40(2):166-177

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Animal medical genetics: a perspective on the epidemiology and control of inherited disorders     

RD Jolly  HT Blair 《New Zealand veterinary journal》2016,64(3):135-144

This perspective considers genetic disorders of domestic animal populations, in particular their epidemiology and control. Inherited disorders of animals share the same basic molecular biology as those of human beings, but they differ in their epidemiology due largely to the breed structure of the various species, human control of breeding and a greater influence of the founder effect, particularly due to extensive use of a limited number of sires, and inbreeding. Control of genetic disorders in animals is also more practical through extensive screening for disease, or heterozygous animals within defined breed populations, followed by exclusion of affected or carrier animals from breeding. This is assisted by the fact that, within a breed, many inherited monogenic disorders are associated with a single mutation. However some of the more important disorders may be inherited in a non-Mendelian manner, being influenced by multiple genes as well as environmental factors. These aspects are discussed and contrasted with similar aspects in human medical genetics.  相似文献   

Bullous retinal detachment in a cat          下载免费PDF全文

Christmas R  Guthrie B 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(5):430-431

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1984,57(5):98-102

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1988,61(6):118-120

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1986,59(7):137-139

Ohne ZusammenfassungPflanzenschutzorganisation für Europa und die Mittelmeerländer  相似文献   

Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1983,56(7):140-143

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Anthropogenic and meteorological factors influence vector abundance and prevalence of bluetongue virus infection of dairy cattle in California     

Mayo CE  Gardner IA  Mullens BA  Barker CM  Gerry AC  Guthrie AJ  MacLachlan NJ 《Veterinary microbiology》2012,155(2-4):158-164

Bluetongue is an economically important arboviral disease of ruminants that is transmitted by hematophagous Culicoides midges. In light of dramatic recent changes in the global distribution of bluetongue virus (BTV), the goals of this study were to re-evaluate the prevalence of BTV infection of cattle and abundance of Culicoides midges on individual dairy farms in California. A serosurvey of adult dairy cattle confirmed that BTV infection is prevalent throughout much of the state, although the coastal northwestern region remains free of infection and prevalence varies markedly among farms in the remainder of the state. Intensive sampling for one year of 4 farms in the northern Central Valley of California showed that the abundance of Culicoides midges was markedly different and coincided with the prevalence of BTV infection of sentinel cattle on each farm. Mean maximum and minimum temperatures and other meteorological parameters were similar on all 4 farms, thus we speculate that particular management practices were responsible for both the increased midge abundance and prevalence of BTV infection of cattle at individual farms. Specifically, it is concluded that variation in vector abundance at individual farms most likely is the result of waste-water lagoon and irrigation management practices, leading to higher BTV infection rates among livestock held on farms with more waste-water lagoons and greater acreage of land for waste-water irrigation.  相似文献