Consulta: subjectFacets:"Estimation"
Registros recuperados: 25
Data/hora: 10/06/2024 07:38:31

Amélioration de l'évaluation des stocks de mollusques cultivés en Charente- Maritime
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Deslous-paoli, Jean-marc; Heral, Maurice; Prou, Jean.
The expansion of shellfish culture businesses (oysters, mussels, clams...) gives way to a competition for the use of limited food resources, especially in the Marennes-Oléron basin where water circulation is slow. Increasing the amount of cultivated molluscs leads, from a biological point of view, to:- a drop in growth performances- a rise in chronic mortalities, higher and higher, due to a weakness in the physiological state with a lack of stocks which would have compensated the habitat seasonal shortages (end of winter, etc...)- a greater weakness to diseases, linked to a deficient physiological state and a density rise which increases the proximity rate and thus, parasite propagation speed.For these primary reasons, and for the future of oyster culture,...
Tipo: Text
Palavras-chave: Modélisation; Estimation; Echantillonnage; Mollusques; Marennes Oléron; Evaluation stocks.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-3841.PDF

Sampling design optimization for EROD measurements in fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Beliaeff, Benoit; Burgeot, Thierry.
Activity of 7-ethoxyresorufin-O-deethylase (EROD) in fish is certainly the best-studied biomarker of exposure applied in the field to evaluate biological effects of contamination in the marine environment. Since 1991, a feasibility study for a monitoring network using this biomarker of exposure has been conducted along French coasts. Using data obtained during several cruises, this study aims to determine the number of fish required to detect a given difference between 2 mean EROD activities, i.e. to achieve an a priori fixed statistical power (l-beta) given significance level (alpha), variance estimations and projected ratio of unequal sample sizes (k). Mean EROD activity and standard error were estimated at each of 82 sampling stations. The...
Tipo: Text
Palavras-chave: Biomonitoring; Estimation; EROD activity; Statistical power; Sample size; Sampling design.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44787/44483.pdf

Physical structures, advection and mixing in the region of Goban spur
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Huthnance, John M.; Coelho, Henrique; Griffiths, Colin R.; Knight, Philip J.; Rees, Andrew P.; Sinha, Bablu; Vangriesheim, Annick; White, Martin; Chatwin, Paul G.
The physical context for ocean margin exchange at Goban Spur is described. Observations adjacent to, prior to and during the Ocean Margin EXchange (OMEX) project of 1993-1996 are used. They include currents measured on moorings, drogued-buoy tracks; temperature and other data from CTD profiles, especially as indicators of vertical mixing; evidence from models, particularly for turbulence causing vertical mixing. These data are combined in estimates of (seasonally dependent) mean flow, tidal currents, other current variability, exchange and mixing over the main cross-slope section studied in OMEX and in nearby and contrasted locations (aided by the use of earlier and adjacent measurements). Causative physical processes are discussed: potentially northward...
Tipo: Text
Palavras-chave: Estimation; Physical process; Tidal current; Mixing; Ocean margin exchange; Physical oceanography.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-740.pdf

Difficulties in sampling for estimation of phytoplankton biomass in estuarine conditions : variabilities and precisions at different temporal scales in the case of the bay Marennes Oleron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Goulletquer, Philippe; Razet, Daniel; Prou, Jean; Ravail, Brigitte; Maestrini, Serge.
Different sampling strategies have been tested for estimation of phytoplanktonic biomasses in a bay submitted to estuarine conditions and high velocity of currents. Daily variations showed that for a precision of 5% of the daily mean, it is necessary to sample with a 1 hour and a half time scale. Systematic sampling appears to be more preceise than the random sampling. A sampling during 35 days at low tide and at high tide, during the phytoplanktonic bloom, showed the large variability between the days. A precision of 30% of the mean biomass of the month is obtained with a 8 days time scale. Comparison between tidal cycle sampling (10% of precision) with a punctual sample in the middle of the day did not show large differences. As the main variability is...
Tipo: Text
Palavras-chave: Marennes Oleron; Phytoplanktonic biomasses; Estimation.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/acte-2877.pdf

Estimation de la biomasse d'huîtres non cultivées dans le bassin de Marennes-Oléron
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Prou, Jean; Pouvreau, Stephane; Renaud, Vivian.
In the Marennes-Oléron oyster culture basin, the cultivated oyster stock shows an unbalanced age distribution: 25 000 to 30 000 tonnes are commercialized each year for a total cultivated biomass of 95 000 tonnes (1993). The biological overexploitation of the basin requires a reduction of the stock in order to get back to productivity rates that are compatible with the restrictions of the oyster market. This study gives an estimated natural deposit biomass of around 3 000 tonnes. An estimate of the abandoned and wild oyster biomass shows that 20 000 tonnes of these animals can be considered as competitors to cultivated oysters. [...].
Tipo: Text
Palavras-chave: Bassin Marennes Oléron; Echantillonnage; Estimation; Répartition spatiale; Typologie; Biomasse; Crassostrea gigas; Huîtres.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-4741.PDF

Cartographie et évaluation des principaux mollusques filtreurs du Golfe Normano-Breton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Noel, Philippe; Blanchard, Michel; Berthou, Patrick.
During 1993 and 1994, quantitative sampling were realized in Norman Gulf (Western Channel) to estimate molluscs suspension-feeders. Four bivalves are regularly sampled : Spisula ovalis, Tapes rhomboides, Glycymeris glycymeris and Venus verrucosa. For each species, individual age and weight were noticed. The spreading gastropod Crepidula fornicata was also sampled. The resultant biomass and distribution are proposed. These results will contribute to the evaluation of trophic exchanges in boundary layer and to the proposed modeling, in the program PNOC (National Program for Coastal Oceanography). NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Western Channel; Norman Gulf; Crepidula fornicata; Venus verrucosa; Glycymeris glycymeris; Tapes rhomboides; Spisula ovalis; Suspension feeders; Cartography; Estimation; Manche Ouest; Golfe Normano Breton; Crepidula fornicata; Venus verrucosa; Glycymeris glycymeris; Tapes rhomboïdes; Spisula ovalis; Suspensivores; Cartographie; Evaluation.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-3856.pdf

A methology for the stocks assessments of cultivated oysters among along the French Atlantic coasts
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric; Baud, Jean-pierre; Bodoy, Alain; Deslous-paoli, Jean-marc; Dreno, Jean-paul; Heral, Maurice; Maurer, Daniele; Prou, Jean.
An assessment of the reared stocks of the Pacific oyster (Crassostrea gigas ) has been recently conducted on the major French areas of molluscs culture. The methodology proposed included both estimates of densities obtained by subsampling in the field, and aerial photographs which covered the cultivated, intertidal area. The size and the number of samples were designed to reach a precision of 10% on the final assessment in each area. The field work consisted in weighing and counting the oyster in unit areas of 0.5 m2 for the bottom culture or in trays or bags, for the off bottom technique. These results give a better knowledge of the technique evolution and of the general structures in the cultivated areas.
Tipo: Text
Palavras-chave: Modeling; Estimation; Stocks; Crassostrea gigas; Oysters.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2864.pdf

Use of a disjunctive kriging to model areas of high pelagic fish density in acoustic fisheries surveys
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre.
Schooling fish may aggregate in very high densities covering very small areas. Thus the probability of hitting such high-density spots during a large-scale sampling is very low. The sampling fluctuations of the tail of the histogram are thought to be very significant. The stock biomass estimate and its precision rely greatly on how precisely the tail of the histogram can be sampled. In order to acquire elements for improving survey designs and abundance estimators wc study here the relation in space that the high values have with the other values. A disjunctive kriging approach is used. Different quantiles of the histogram are coded by indicators. The spatial structure of each indicator and its spatial covariation with the others are studied by computing...
Tipo: Text
Palavras-chave: Distribution spatiale; Agrégation; Abondance; Estimation; Géostatistique; Échantillonnage; Spatial distribution; Aggregation; Abundance estimation; Geostatistics; Sampling.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00190/30076/28564.pdf

Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bordeyne, François; Robert, Stephane; Le Moine, Olivier; Leaute, Jean-pierre.
On French coast, Manila clam is a bivalve subject of a large activity recreational and professional hand harvest. Two species are represented in France, European Manila clam Ruditapes decussatus (native) and Japanese Manila clam Ruditapes philippinarum (introduced). Predominance of this last species (more than 90 % of number and biomass), earn them the status of invasive species. Contrary to Arcachon bay, Pont l’Abbé River or Morbihan bay, an estimation campaign of Manila clams stock on Marennes-Oléron bay had never been carried out. The objective of this study: estimate, in number and biomass, the Manila clams stock of two areas. The first affect recreational hand harvest, on Saint-Trojan shore (0.8 km²) whereas the second scopes professional hand...
Tipo: Text
Palavras-chave: Palourde; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oléron.; Manilla clam; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oleron.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52621/53459.pdf

Gestion des bassins conchylicoles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Prou, Jean; Sauriau, Pierre-guy; Goulletquer, Philippe.
The excess of farmed mollusc biomass in some French shellfish-farming basins (Marennes-Oléron basin, Isle of Ré, Isle of Bourgneuf) has been clearly highlighted. This manifests itself as a decrease of growth consistency of the molluscs and an increase in chronic mortality rates not linked to pathogenic agents. To this excess of farmed biomass are added the biomass of oysters or "wild" mussels or biomass linked to abandoned concessions.
Tipo: Text
Palavras-chave: Estimation; Croissance; Biomasse; Conchylicultre.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-3084.pdf

Shell of the Great Scallop Pecten maximus as a high-frequency archive of paleoenvironmental changes - art. no. Q08001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chauvaud, Laurent; Lorrain, Anne; Dunbar, Robert; Paulet, Yves; Thouzeau, Gérard; Jean, Frédéric; Guarini, Jean-marc; Mucciarone, David.
We investigate the environmental and biological controls on oxygen isotope ratios in the shells of modern Pecten maximus bivalves collected alive in the Bay of Brest (France). Seasonal delta(18)O profiles, obtained by drilling the daily calcite ridges deposited at the surface of the left valve, were compared with in situ measurements of temperature and salinity. We show that P. maximus delta(18)O values accurately track seasonal variations in bottom water temperature. Shell growth rate has no significant effect on shell delta(18)O values. Our study demonstrates that daily variations in water temperature can be reconstructed within about 0.5 degrees C. Temperatures estimated with the paleotemperature equation established in this study were compared with...
Tipo: Text
Palavras-chave: Pecten Maximus; Brittany; Paleoenvironment; Estimation; Daily varition; Water temperature; Isotope; Calcite; Shell; Ëecten maximus; Paleotempérature; Variation saisonnière; Température eau; Strie croissance; Isotope; Coquille.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-643.pdf

Estimating EAF indicators from scientific trawl survey : theorretical and pratical concerns
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Jouffre, D.; Borges, M.; Bundy, A.; Coll, M.; Diallo, I.; Fulton, E.A.; Guitton, J.; Labrosse, P.; Mohamed Abdellahi, K.O.; Masumbuko, D.; Thiaro, D.
Tipo: Journal Contribution
Palavras-chave: Scientific research; Estimation; Trawling; Ices.
Ano: 2010
URL: http://hdl.handle.net/1834/4985

Collinearity in Linear Structural Models of Market Power
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Perloff,   Jeffrey M.; Shen,   Edward Z.
The well-known structural model used to estimate market structure suffers from a severe collinearity problem if the marginal cost and demand equations are linear.
Tipo: Working or Discussion Paper
Palavras-chave: Market power; Estimation; Demand and Price Analysis; Industrial Organization; L13; C1.
Ano: 2001
URL: http://purl.umn.edu/25012

LEAST SQUARES AND ENTROPY AS PENALTY FUNCTIONS
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Preckel,   Paul V.
Mathematical measures of entropy as defined by Shannon (1948) and Kullback and Leibler (1951) are currently in vogue in the field  of econometrics, primarily due to the comprehensive work by  Golan, Judge, and Miller (1996). In this paper, an alternative interpretation of the entropy measure as a penalty function over deviations is presented. Using this interpretation, a number of parallels are drawn with least squares estimators, and it is demonstrated that, with a minor modification of the traditional least squares estimator, both approaches may be applied to the general linear model.  The advantages and disadvantages of each approach are discussed, and a philosophical approach to the selection of estimation technique is suggested.
Tipo: Working or Discussion Paper
Palavras-chave: Entropy; Econometrics; Penalty functions; Estimation; Research Methods/ Statistical Methods.
Ano: 1998
URL: http://purl.umn.edu/28625

Grain Sorghum International Trade: U.S.-Mexico Simulation and Estimation Model
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Liu,   Bing; Malaga,   Jaime E.
An econometric international supply/demand/trade simulation and forecast sorghum model in a partial equilibrium framework is built in this research paper to quantify the effects of key exogenous variables on the U.S.-Mexico sorghum trade. A forecast baseline is also established by using the validated model and values of exogenous variables provided by FAPRI to project the level of endogenous variables over the period of 2009 to 2017. Impacts of plausible alternative scenarios for key exogenous variables are simulated from 2009 to 2017.
Tipo: Conference Paper or Presentation
Palavras-chave: Sorghum; International Trade; Simulation; Estimation; International Relations/Trade.
Ano: 2010
URL: http://purl.umn.edu/56434

Agro-well and pump diffusion in the dry zone of Sri Lanka:  Past trends, present status and future prospects
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Kikuchi,   Masao; Weligamage,   Parakrama; Barker,   Randolph; Samad,   Madar; Kono,   Hiroichi; Somaratne,   H.M.
The use of shallow wells, equipped with small pumps, to lift groundwater has spread rapidly in many agricultural regions of tropical monsoonal Asia. In Sri Lanka, the rapid and pervasive invasion of agro-wells and pumps drew the attention of policymakers and researchers, but many questions were left unanswered due to lack of research in the area. This study aims to fill this gap in knowledge, based on observations and data obtained in field surveys conducted in major and minor irrigation schemes in the dry zone of Sri Lanka. This report gives the key findings of this study into the pattern, extent and causes of the spread and use of agro-wells and pumps in traditional villages and irrigated settlement schemes. It investigates farmer investments in...
Tipo: Report
Palavras-chave: Wells; Construction technology; Pumps; Arid zones; Investment; Irrigation systems; Irrigation programs; Rice; Estimation; Agribusiness; Agricultural Finance; Crop Production/Industries; Financial Economics; Marketing; Public Economics.
Ano: 2003
URL: http://purl.umn.edu/44558

Spatial variation in water supply and demand across river basins of India
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Amarasinghe,   Upali A.; Sharma,   Bharat R.; Aloysius,   Noel; Scott,   Christopher A.; Smakhtin,   Vladimir U.; de Fraiture,   Charlotte.
India is a large country with regional differences in per-capita water supply and demand. Attempts to describe the water situation in India at a national level are often misleading due to the tremendous diversity in the water situation across the country. This Report analyzes the spatial variation of water supply and demand across river basins in India. The study identifies basins that are water-scarce because of inadequate water availability to meet the effective demand. It also identifies issues that are important for estimating the future water demand and for the formation of policy for future water-resources development and management.
Tipo: Report
Palavras-chave: Water supply; Water demand; River basins; Catchment areas; Water availability; Water scarcity; Estimation; Irrigation water; Domestic water; Population growth; Urbanization; Groundwater extraction; Crop production; Policy; Water transfer; India; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics.
Ano: 2004
URL: http://purl.umn.edu/52966

The Effects of China's Tariff Reductions on EU Agricultural Exports
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Niemi,   Jyrki S.; Huan-Niemi,   Ellen.
China's accession to the WTO means significant increases in export opportunities for China's trading partners. This study attempts to identify and measure quantitatively the effects of changing economic environment and trade policies on China's agricultural imports from the European Union (EU). The approach is to estimate demand functions for China's agri-food imports from the EU using semi-annual data from 1980 to 2000. The demand functions are used to measure the impacts of relative-price and trade policy changes on EU agricultural exports to China. The results suggest that in China, there is a relatively strong demand response for agrifood imports to changes in income and prices. Furthermore, the results indicate that relative-price variations affect...
Tipo: Conference Paper or Presentation
Palavras-chave: China; WTO; Agricultural trade; Tariffs; Demand functions; Estimation; International Relations/Trade.
Ano: 2002
URL: http://purl.umn.edu/24839

O ESQUEMA DE TARIFAS EM BLOCO PRATICADO PELAS COMPANHIAS DE ÁGUA: UM ESTUDO DOS CONSUMIDORES RESIDENCIAIS DE BAIXA RENDA
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pizaia,   Marcia Goncalves; Alves,   Rozane.
Partindo-se da tarifa de água cobrada dos consumidores residenciais de baixa renda no município de Cambe, Estado do Paraná, considerando-se o esquema de tarifas em bloco praticado pelas companhias de água, da renda familiar, do número de habitantes por domicílio, e dos custos marginais de produção de água, este estudo objetiva estimar, através da função demanda residencial por água, quanto os aumentos efetuados nas tarifas cobradas aos usuários residenciais de renda baixa influenciam na quantidade de água demandada por esses usuários. Concluiu-se que a demanda residencial por água explica, para a classe analisada, a hipótese que deveria ser provada. Ou seja, mudanças efetuadas nas tarifas cobradas aos usuários, afetam as quantidades de água demandadas por...
Tipo: Conference Paper or Presentation
Palavras-chave: Estimação; Função demanda; Baixa renda; Estimation; Demand function; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108928

Agricultural water productivity: estimation at plot, farm and basin scale
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Cook,   Simon; Gichuki,   Francis; Turral,   Hugh.
Tipo: Working or Discussion Paper
Palavras-chave: Irrigated farming; Productivity; Estimation; Water balance; Water use; Simulation models; Water use efficiency; Livestock; Fisheries; Production Economics; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/91959

Estimating water requirements and water storage requirements for farms, community and backyard gardens, and for large irrigation systems: A user manual for PLANWAT Version 1.2.3b and a CD-ROM to install this program
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: van Heerden,   Pieter S.
Tipo: Working or Discussion Paper
Palavras-chave: Computer models; Computer software; Irrigation requirements; Estimation; Irrigated farming; Irrigation management; Water harvesting; Water requirements; Water storage; Production Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/92657

Natural convection drying kinetics of ‘Prata’ and ‘D’água’ banana cultivars (Musa ssp) by nonlinear regression models
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Furtado,Thais Destefani Ribeiro; Muniz,Joel Augusto; Silva,Edilson Marcelino; Frühauf,Ariana Campos; Fernandes,Tales Jesus.
Abstract  Banana is among fruits most planted in tropical countries and belongs to the fruit group most consumed in the world; however, banana needs proper conservation techniques. The aim of this study was to describe the drying kinetics of ‘Prata’ and ‘D’água’ banana cultivars at temperatures of 40 and 70°C, comparing the Henderson, STPE, Lewis, Page and Fick regression models, estimating the Absolute Drying Rate (ADR). Parameters were estimated with R and SAS Studio softwares, using for comparison and selection models of the R²aj, RSD and corrected Akaike Information Criteria. The Page and Fick models did not adjust, and the others presented good adjustment to data. The Henderson model was the most suitable to describe data of ‘Prata’ banana at both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food preservation; Absolute Drying Rate; Estimation; Statistical models.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000500901

Best distribution and plotting positions of daily maximum flood estimation at Ona River in Ogun-Oshun river basin, Nigeria
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Temitayo Abayomi EWEMOJE; Department of Agricultural and Environmental Engineering, University of Ibadan; O. S. Ewemooje; Department of Statistics, University of Ibadan.
The paper discusses how Normal, Lognormal, and log-Pearson type 3 distributions were investigated as distributions for modelling at-site annual maximum flood flows using the Hazen, Weibull, and California plotting positions at Ogun-Oshun river basin in Nigeria.  All the probability distributions when matched with Weibull plotting position gave similar values near the center of the distribution but varied considerably in the tails.  The Weibull plotting position when matched with Normal, Log-normal and Log Pearson Type III probability distributions gave the highest coefficient of determinations of 0.967, 0.987, and 0.986 respectively.  Hazen plotting position gave minimal errors with the RMSE of 6.988, 6.390, and 6.011 for Normal, Log-normal, and...
Palavras-chave: Probability distributions; Plotting positions; Maximum flood; Estimation; Statistical modelling; Nigeria.
Ano: 2011
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1380

A weighted negative binomial Lindley distribution with applications to dispersed data
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: BAKOUCH,HASSAN S.
Abstract A new discrete distribution is introduced. The distribution involves the negative binomial and size biased negative binomial distributions as sub-models among others and it is a weighted version of the two parameter discrete Lindley distribution. The distribution has various interesting properties, such as bathtub shape hazard function along with increasing/decreasing hazard rate, positive skewness, symmetric behavior, and over- and under-dispersion. Moreover, it is self decomposable and infinitely divisible, which makes the proposed distribution well suited for count data modeling. Other properties are investigated, including probability generating function, ordinary moments, factorial moments, negative moments and characterization. Estimation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Characterization; Discrete distributions; Estimation; Vuong test statistic; Mixture distributions; Thunderstorms data.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602617

Estimated live weight of growing Pêga breed donkeys
Provedor de dados: Ciência Rural
Autores: Moreira,Camilla Garcia; Balieiro,Júlio César de Carvalho; Menezes,Madalena Lima; Ribeiro,Gabriela; Nascimento,Olivia Carmen de Araújo; Brandi,Roberta Ariboni.
ABSTRACT: The equations available in the literature to estimate the body weight (BW) of Pêga breed donkeys were evaluated using 25 animals aged 0-6 months and it was proposed an equation for BW prediction. For the measurement of the thoracic perimeter (TP) and for weighing the animals using the weighing tape, the animals were positioned in a forced station on a steep slope. An electronic scale was used for the determination of the BW. Accuracy of linear and nonlinear equations described in the literature was tested for BW prediction based on the animals’ TP, followed by the comparison of these equations with the equation developed in the present study for BW prediction of Pêga breed donkeys. A difference was noted (P&lt;0.001) between the weights obtained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accuracy; Asinine; Equations; Estimation; Growth.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000651