Global Networks in Local Agriculture: A Framework for Negotiation     

Keith M. Moore 《Journal Of Agricultural & Food Information》2013,14(1):23-39

Agricultural systems operate through the enrollment of local actors into social networks. These social networks share common idioms and expectations concerning appropriate knowledge and practices. Interaction and competition between social network segments creates the potential for technological change and sustainable production. In the past, global actors enrolled local actors into the networks of modern agriculture through the success of the technology transfer model. However, the innovation to resolve the current problems of local agroecologies requires a more reflexive approach. The adaptive management model facilitates the negotiation of boundaries between networks while addressing the most pressing issues of sustainable local agriculture.  相似文献   

Predictive equations for managing semi-intensive grow-out of a freshwater crayfish (marron), Cherax tenuimanus (Smith 1912) (Decapoda: Parastacidae), on a commercial farm     

N M Morrissy  P Walker  W Moore 《Aquaculture Research》1995,26(1):71-80

Stocking and harvest data from 45 grow-outs of the crayfish Cherax tenuimanus (Smith 1912) on a commercial farm were analysed to give predictive equations for survival, mean weight and individual weights of crayfish at harvest. Density dependence was a major factor influencing variation in survival and mean weight. Harvest mean weight decreased, and biomass increased, with density. The crayfish price ($ kg^?1) employed to estimate the market value of harvested crayfish increased with individual weight from a minimum saleable weight of 40 g. For grow-out of 0+ year-olds for 1 year, the market value was a maximum at low stocking densities of 1.5-2.0 m^?2. Further grow-out for 1 year of the unsaleable weight range (20-40 g) of 1+ year-olds, gave a harvest value which increased with stocking density. Comparison of predicted and actual cohort numbers and mean weights for a further 1 5 harvests showed no bias in prediction and a mean precision level of 16% for numbers and 11% for mean weight.  相似文献   

Amino acids indigenous to the murray meteorite     

Lawless JG  Kvenvolden KA  Peterson E  Ponnamperuma C  Moore C 《Science (New York, N.Y.)》1971,173(3997):626-627

Analysis of the Murray meteorite, a type II carbonaceous chondrite, has led to the identification of 17 amino acids. For seven of the amino acids nearly equal amounts of the D and L isomers are present, and 11 of the amino acids are not found in protein. These results suggest that these amino acids, like the amino acids of the Murchison meteorite, are extraterrestrial in origin.  相似文献   

Coastal Russet: a mid-season Russet-skinned potato cultivar     

J. B. Sieczka  R. E. Webb  D. R. Wilson  D. E. Halseth  S. B. Sterrett  M. R. Henninger  G. A. Porter  J. R. Shumaker  R. Moore 《American Journal of Potato Research》1988,65(12):N1-N1

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Clinical Characteristics and Outcome in Dogs with Splenic Marginal Zone Lymphoma     

D. O'Brien  P.F. Moore  W. Vernau  J.R. Peauroi  R.B. Rebhun  C.O. Rodriguez Jr.  K.A. Skorupski 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2013,27(4):949-954

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Randomized Trial of Cisplatin versus Firocoxib versus Cisplatin/Firocoxib in Dogs with Transitional Cell Carcinoma of the Urinary Bladder     

D.W. Knapp  C.J. Henry  W.R. Widmer  K.M. Tan  G.E. Moore  J.A. Ramos‐Vara  M.D. Lucroy  C.B. Greenberg  S.N. Greene  A.H. Abbo  P.D. Hanson  R. Alva  P.L. Bonney 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2013,27(1):126-133

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Effect of Different Manganese Concentrations during in vitro Maturation of Bovine Oocytes on DNA Integrity of Cumulus Cells and Subsequent Embryo Development     

JP Anchordoquy  JM Anchordoquy  MA Sirini  G Mattioli  SJ Picco  CC Furnus 《Reproduction in domestic animals》2013,48(6):905-911

Manganese (Mn) is a trace element present in forages and cereals, and its concentration depends on soil status. Manganese deficiency in cattle, goats and ewes not only impairs oestrous cycle but reduces calf birth weight. The achievement of the first oestrus is delayed, and more attempts are necessary to obtain a successful conception. This study was conducted to investigate the effect of the availability of supplemental Mn during IVM on DNA damage of cumulus cells and total glutathione (GSH) content in oocytes and cumulus cells. The effect of supplementary Mn during IVM on subsequent embryo development was also studied. The results reported here indicate (i) DNA damage in cumulus cells decreased with 0, 2, 5 and 6 ng/ml Mn supplementation during IVM (p < 0.05). (ii) Intracellular GSH‐GSSG content increased (p < 0.01) with different Mn concentrations in oocytes and cumulus cells. Also, cumulus cell number per cumulus oocyte‐complexes (COC) did not differ either before or after IVM. (iii) Addition of Mn to maturation medium resulted in similar cleavage rates (p > 0.05) at 0, 2, 5 and 6 ng/ml Mn. However, subsequent embryo development to blastocyst stage was significantly higher (p < 0.01) in oocytes matured with 5 and 6 ng/ml Mn. (iv) There was also an increase (p < 0.05) in mean cell number per blastocyst obtained from oocytes matured with 5 and 6 ng/ml respect to zero Mn (IVM alone) and 2 ng/ml Mn. This study provides evidence that optimal embryo development to the blastocyst stage was partially dependent on the presence of Mn during IVM. Moreover, the availability of Mn during oocyte maturation ensures ‘normal’ intracellular GSH content in COCs and protects DNA integrity of cumulus cells.  相似文献   

Characterization of GFRα‐1‐Positive and GFRα‐1‐Negative Spermatogonia in Neonatal Pig Testis     

KH Lee  WY Lee  JH Kim  MJ Yoon  NH Kim  JH Kim  SJ Uhm  DH Kim  HJ Chung  H Song 《Reproduction in domestic animals》2013,48(6):954-960

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Melanoma in horses: Current perspectives     

J. S. Moore  C. Shaw  E. Shaw  V. Buechner‐Maxwell  W. K. Scarratt  M. Crisman  M. Furr  J. Robertson 《Equine Veterinary Education》2013,25(3):144-151

Debate surrounding the nature of equine melanoma has resulted in an underestimation of its life‐threatening potential. Contrary to popular dogma, the variable, often slow, rate of growth commonly associated with equine melanoma does not warrant benign classification. Equine melanoma is a malignant neoplasm with the capacity for local invasion and metastasis. A classification scheme was proposed in 1995, but this does not address the progressive nature of equine malignant melanoma (EMM). Additionally, frustration with conflicting therapeutic recommendations has led many practitioners to inappropriately advocate benign neglect. This article addresses the need for a clinically applicable, standardised classification system, provides a review of current therapies and recommendations for equine practitioners, and comments on the future directions of EMM research.  相似文献   

Distribution of prion protein genotypes in breeds of sheep in New Zealand     

MA Lee  TR Manley  BC Glass  RM Anderson  SJ Wilson  JS O'Keefe 《New Zealand veterinary journal》2013,61(5):222-227

AIM: To use an established high through-put genotyping procedure to gain an estimate of the frequency of alleles of the prion protein (PrP) gene in some common sheep breeds in New Zealand.

METHODS: Using a genotyping procedure based on matrix-assisted laser desorption ionisation-time of flight (MALDI-TOF), DNA samples from 3,024 sheep from New Zealand, including breeds such as Romney, Texel, Coopworth, Merino and mixedbreed, were isolated, genotyped and the results analysed.

RESULTS: The 15 scrapie genotypes commonly reported, and derived from the five commonly reported allelic variants (ARR, ARQ, AHQ, ARH and VRQ), were all observed in the samples analysed. The estimates were indicative of the frequencies in the population of alleles present in breeds of sheep in New Zealand. There was a significant difference between the frequencies of alleles between breeds, but the ARQ, followed by the ARR allele, were, except in Carwell sheep, the most common alleles present.

CONCLUSION: This study gave an indication of the percentages of PrP gene alleles in sheep in New Zealand, including data previously unreported from breeds in this country. It is of interest because of the relatively large size of the sheep population in New Zealand compared with many countries, and it provides some useful information on the genetic susceptibility or resistance of the sheep population in New Zealand to scrapie. The frequencies of the alleles can be different for an individual breed compared between countries.  相似文献