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| Registros recuperados: 13.863 | |
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| Yamazaki, T; Oda, H. |
| We have conducted a paleomagnetic study of six sediment cores taken from the equatorial Pacific, three from the West Caroline Basin and three from the Manihiki Plateau, in order to make a relative paleointensity stack during the Matuyama and late Gauss Chrons. The age of the bottom of the cores ranges from 1.2 to 3.0 Ma. The sediments show little downcore changes in the proxies of magnetic grain size and mineralogy and are hence suitable for estimating relative paleointensity. The age of the cores is controlled by correlating variations in magnetic concentration ( magnetic susceptibility and/or anhysteretic remanent magnetization (ARM)) to target oxygen-isotope (delta(18)O) curves. All cores from the Manihiki Plateau show an upward decrease of the natural... |
| Tipo: Text |
Palavras-chave: Equatorial Pacific; Excursion; Orbital modulation; Paleointensity; Paleomagnetism. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00232/34285/32650.pdf |
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| Logan, Joanne; Walker, Forbes R.; Jolly, Brooke A.; Foster, Tiffany. |
| Under the Clean Water Act, U.S. states are required to establish water quality standards, list impaired waterbodies and create Total Maximum Daily Loads (TMDL) for impaired waters. Sediment contributes greatly to the water impairment in Tennessee, with agriculture often cited as the primary source. The watershed (catchment) in our study, Pond Creek, is listed as impaired for sediment and will require a TMDL and watershed restoration plan in the near future. The Tennessee Valley Authority (TVA) has developed an Integrated Pollutant Source Identification tool, consisting of aerial photographs, GIS database, and set of analysis spreadsheets to help plan watershed restoration efforts. We used this tool to assess sediment delivery from pastures, soil loss from... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2005 |
URL: http://purl.umn.edu/47960 |
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| Deblitz, Claus; Hemme, Torsten; Isermeyer, Folkhard; Plessmann, Frank. |
| Before IFCN was founded, existing farm-level data sets for international comparisons - if there were any - were not comparable. Differences from country to country regarding methodology applied, extent of data sets (physical and financial figures), and availability of up-to-date figures caused the incomparability. The IFCN is a world-wide association of agricultural scientists, advisors and farmers. Within the framework of this co-operation, farms and agricultural production systems are defined that are typical for their regions. Their economic situation is analysed, and the farms can be projected into the future. At present, the network, which is coordinated by the IFCN-centre in Braunschweig, Germany, operates for three branches: dairy (> 30... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm comparisons; Typical farms; International competitiveness; International Farm Comparison Network; Farm Management; Institutional and Behavioral Economics. |
| Ano: 2005 |
URL: http://purl.umn.edu/24247 |
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| Hailu, Yohannes G.; Brown, Cheryl. |
| Using county data for West Virginia, Maryland, and Pennsylvania, estimation of a system of simultaneous equations shows that population growth, higher taxes, high farmland value, and high initial per capita income accelerate farmland development, but return on farmland, government assistance to farmers, farmland conservation, and farming agglomeration reduce development pressure. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farmland; Development; Regional growth; Policy; Equilibrium model; Spatial autocorrelation; Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/19488 |
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| Singh-Knights, Doolarie; Smith, Dennis K.; Knights, Marlon. |
| This paper examines whether buyers of live lambs and goats in the Northeast region have systematic preferences for specific live product attributes (age, weight, market class, sales lot size, market location and timing of sale) and whether they pay significantly different prices for these attributes consistent with their preferences. Non-linear hedonic models are estimated using auction price and quality data for live lambs and goats in specific Northeast markets. The results indicate that both lamb and goat buyers have systematic preferences for specific weight, market class and timing of sale, and that these preferences are implicitly reflected in prices offered in traditional auction markets. Producers can capitalize on price differences based on... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Institutional and Behavioral Economics. |
| Ano: 2005 |
URL: http://purl.umn.edu/19289 |
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| Edmeades, Svetlana. |
| A hedonic price model is used to estimate the marginal value function for output characteristics of a subsistence crop in a developing economy. Within the framework of the agricultural household, with non-separable consumption and production decisions, prices reflect the implicit marginal valuation of both consumption and production attributes jointly. Variety-specific crop product farm-gate prices are used in the hedonic analysis. The findings provide guidance for future crop improvement efforts, while revealing those attributes most likely to capture premiums at the market place. Implicit premiums for attribute scarcity are also revealed. Improvements in infrastructure could partially reduce the implicit costs of transportation, leading to higher... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2005 |
URL: http://purl.umn.edu/19500 |
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| Sotillo, M; Ratsimandresy, A; Carretero, J; Bentamy, Abderrahim; Valero, F; Gonzalez Rouco, F. |
| A 44-year (1958-2001) high-resolution atmospheric hindcast for the whole Mediterranean Basin was performed within the EU-funded Hindcast of Dynamic Processes of the Ocean and Coastal Areas of Europe (HIPOCAS) Project. The long-term hindcasted data set, which comprises several atmospheric parameters at different levels, was produced by means of dynamical downscaling from the NCEP/NCAR global reanalysis using the atmospheric limited area model REMO. The REMO hindcast has been exhaustively validated. On that score, various hindcasted surface parameters, such as 10-m wind field, 2-m temperature and mean sea level pressure, have been compared to satellite data (ERS-1/2 scatterometer) and in-situ measurements from offshore stations. In addition, two ocean models... |
| Tipo: Text |
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| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-3804.pdf |
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| Mai, Kangsen; Yu, Hairui; Ma, Hongming; Duan, Qingyuan; Gisbert, Enric; Zambonino, Jose-luis; Cahu, Chantal. |
| The ontogenetic development of the gut and accessory organs in large yellow croaker Pseudosciaena crocea was investigated using light microscopy from hatching up to the juvenile stage (40 days post hatch, dph). At 3 dph (mean +/- S.D., 4.1 +/- 0.1 mm total length, L-T), coinciding with the buccopharynx opening, larvae started to feed exogenously, and the gut consisted of a well-developed buccopharynx, a partially-differentiated oesophagus and an intestine divided in three regions (anterior intestine, intermediate intestine and rectum). Yolk reserves were not completely depleted at the onset of exogenous feeding, and a period of mixed nutrition was observed up to 6 dph (4.3 +/- 0.1 mm L-T) when yolk was definitively exhausted. Important morphological... |
| Tipo: Text |
Palavras-chave: Pseudosciaena crocea; Ontogenetic development; Large yellow croaker; Histology; Digestive system. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-930.pdf |
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| Gittenberger, A.; Gittenberger, E.. |
| Twenty-two epitoniid species that live associated with various hard coral species are described. Three genera, viz. Epidendrium gen. nov., Epifungium gen. nov., and Surrepifungium gen. nov., and ten species are introduced as new to science, viz. Epidendrium aureum spec. nov., E. sordidum spec. nov., Epifungium adgranulosa spec. nov., E. adgravis spec. nov., E. adscabra spec. nov., E. marki spec. nov., E. nielsi spec. nov., E. pseudolochi spec. nov., E. pseudotwilae spec. nov., Surrepifungium patamakanthini spec. nov., and ‘Epitonium’ crassicostatum spec. nov. and ‘E.’ graviarmatum spec. nov. Although their identities as separate gene pools are convincingly demonstrated by molecular data, some of these species cannot be identified unequivocally on the basis... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Indo-Pacific; Parasites; Coral reefs; Coral/mollusc associations; Epitoniidae; Epitonium; Epidendrium; Epifungium; Surrepifungium; New species; New genera; Scleractinia; Fungiidae; Fungia; 42.73. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/214349 |
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| Registros recuperados: 13.863 | |
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