Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 19
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A Toolkit Modeling Approach for Sustainable Forest Management Planning: Achieving Balance between Science and Local Needs Ecology and Society
Sturtevant, Brian R.; Northern Research Station, U.S. Forest Service; bsturtevant@fs.fed.us; Fall, Andrew; Gowlland Technologies Ltd; fall@cs.sfu.ca; Simon, Neal P. P.; Newfoundland and Labrador Department of Natural Resources; nealsimon@gov.nl.ca; Morgan, Don G.; British Columbia Ministry of Forests; Don.Morgan@gems7.gov.bc.ca.
Tipo: Peer-Reviewed Reports Palavras-chave: Decision support; Ecosystem management; Forest sustainability; Interdisciplinary modeling; Land planning; Participatory modeling; Scaling.
Ano: 2007
Imagem não selecionada

Imprime registro no formato completo
Allometry as evidence of sexual selection in monochromatic birds: the case of the Coscoroba Swan (Anseriformes: Anatidae) Rev. Bras. Zool.
Calabuig,Cecilia P.; Green,Andy J.; Muriel,Roberto; Katzenberger,Marco; Patino-Martinez,Juan; Moreira,Heden M..
The Coscoroba Swan, Coscoroba coscoroba (Molina, 1782), is a poorly known aberrant Anserine endemic to South America. We captured adult birds (189 male, 157 female) from the largest population in Brazil at the Taim Ecological Reserve, State of Rio Grande do Sul, Brazil. Different patterns between sexes can reflect differences in selection, and positive allometry may indicate that a character is sexually selected. We used body weight and 10 morphological measurements to examine allometric differences between males and females of C. coscoroba. Males were consistently larger than females. Analysis of scaling relationships against body mass showed that nostril, tail, wing and bill height were positively allometric (i.e., heavier birds had relatively larger...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Monomorphic; Natural selection; Waterfowl; Scaling.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400008
Imagem não selecionada

Imprime registro no formato completo
Alternative specifications of advertising in the Rotterdam model AgEcon
Brown, Mark G.; Lee, Jonq-Ying.
This paper examines several approaches to introduce advertising in systems of demand equations. Advertising is included in the Rotterdam model using an unrestricted specification and three restricted specifications - advertising affects demand alternatively through (1) marginal utilities as in studies by Duffy (1987, 1989, 1990) and Selvanathan (1989), (2) scaling parameters which can be viewed as indicators of product quality, and (3) translation parameters which can be viewed as indicators of basic needs. A test to choose among the alternative specifications is provided and the methodology is applied to data on demand for fruit juice products.
Tipo: Report Palavras-chave: Advertising; Rotterdam model; Scaling; Translation; Demand and Price Analysis.
Ano: 1991 URL: http://purl.umn.edu/52717
Imagem não selecionada

Imprime registro no formato completo
Breaking the rule: multiple patterns of scaling of sexual size dimorphism with body size in orthopteroid insects Rev. Soc. Entomol. Argent.
Bidau,Claudio J.; Taffarel,Alberto; Castillo,Elio R..
Sexual size dimorphism (SSD) although a widespread phenomenon among animals, is both enigmatic as to its proximate and ultimate causes and the scaling relationships between SSD and body size (Rensch's rule). We analyzed SSD at the intra- and interspecific levels in a number of representative species and genera of the major orthopteroid orders: Orthoptera, Phasmatodea, Mantodea, Blattodea, Dermaptera, Isoptera, and Mantophasmatodea. The vast majority of the species showed female biased SSD but numerous exceptions occur in cockroaches and earwigs. Rensch's rule and its converse are not common patterns at both, intra-and cross-species level, most species and genera showing an isometric relationship between male and female body sizes. In some but not all...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body size; Blattodea; Dermaptera; Mantodea; Mantophasmatodea; Morphometric traits; Orthoptera; Phasmatodea; Rensch's rule; Scaling.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802016000100002
Imagem não selecionada

Imprime registro no formato completo
Caracterização e prevenção de incrustações em sistemas de dessalinização por osmose inversa. Infoteca-e
AMORIM, M. C. C. de; SILVA JUNIOR, L. G. de A.; PORTO, E. R..
O que são incrustações; Scaling; Prevenção do Scaling; Conclusão.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Água; Dessalinização; Osmose inversa; Incrustação; Água salina; Water desalting; Scaling.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/131456
Imagem não selecionada

Imprime registro no formato completo
Crossing Scales and Disciplines to Achieve Forest Sustainability Ecology and Society
Sturtevant, Brian; Institute for Applied Ecosystems Studies, Northern Research Station, US Forest Service; bsturtevant@fs.fed.us.
Tipo: Peer-Reviewed Synthesis Palavras-chave: Decision support; Ecosystem management; Forest sustainability; Interdisciplinary modeling; Land planning; Participatory modeling; Scaling; Sustainable forest management..
Ano: 2008
Imagem não selecionada

Imprime registro no formato completo
Disentangling Scale Approaches in Governance Research: Comparing Monocentric, Multilevel, and Adaptive Governance Ecology and Society
Termeer, Catrien J.A.M.; Public Administration and Policy Group, Wageningen University; katrien.termeer@wur.nl; Dewulf, Art; Public Administration and Policy Group, Wageningen University; art.dewulf@wur.nl; Lieshout, Maartje van; Public Administration and Policy Group, Wageningen University; maartje.vanlieshout@wur.nl.
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive governance; Levels; Monocentric governance; Multilevel governance; Scale mismatch; Scaling.
Ano: 2010
Imagem não selecionada

Imprime registro no formato completo
Economic Governance to Expand Commercial Wetlands: Within- and Cross-Scale Challenges Ecology and Society
de Blaeij, Arianne T.; LEI Wageningen UR; Arianne.deblaeij@wur.nl; Polman, Nico; LEI Wageningen UR; Nico.Polman@wur.nl; Reinhard, Stijn; LEI Wageningen UR; Stijn.Reinhard@wur.nl.
Commercial wetlands are defined as wetlands directed by an entrepreneur with the intention of making a profit. The combination of ecosystem services that commercial wetlands can provide seems to be an attractive societal perspective. Nevertheless, these wetlands are not developed on a large scale in the Netherlands. This paper discusses different types of economic governance that could facilitate the development of new commercial wetlands and addresses challenges that have to be overcome. We conclude that developing governance solutions that address ecosystem services with different scales is crucial for the introduction of commercial wetlands. Also, distinct and autonomous property rights of entrepreneurs need to be addressed.
Tipo: Peer-Reviewed Reports Palavras-chave: Commercial ecosystem; Economic governance; Economic value; Ecosystem management; Ecosystem services; Multifunctional land use; PES systems; Scaling; Social-ecological systems.
Ano: 2011
Imagem não selecionada

Imprime registro no formato completo
Finite size scaling in the local abundances of geographic populations Biol. Res.
Abades,Sebastián R; Marquet,Pablo A.
We analyzed the statistical distribution of intra-specific local abundances for a set North American breeding bird species. We constructed frequency plots for every species and found that they showed long-tail power-law behavior, truncated at an upper abundance cut-off value. Based on finite size scaling arguments, we investigated whether frequency curves may be considered scaled copies of each other. Data collapse was possible after taking powers of the total abundance of each species, in order to correct deviations from the underlying universal finite size scaling function (UFSS). The UFSS power law exponent oscillated in time within the regime of unbounded variance, which is consistent with the wild fluctuations that characterize ecological phenomena....
Tipo: Journal article Palavras-chave: Finite size scaling; Geographic population; Data collapse; Truncated power-law; Bose-Einstein distribution; Scaling.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000100013
Imagem não selecionada

Imprime registro no formato completo
From Scaling to Governance of the Land System: Bridging Ecological and Economic Perspectives Ecology and Society
Veldkamp, Tom; Faculty of Geo-Information Science and Earth Observation. University of Twente; veldkamp@itc.nl; Polman, Nico; LEI part of Wageningen UR (Agricultural Economics Research Institute); Nico.Polman@wur.nl; Reinhard, Stijn; LEI part of Wageningen UR (Agricultural Economics Research Institute); Stijn.Reinhard@wur.nl; Slingerland, Maja; Wageningen University, Plant Production Systems Group; Maja.Slingerland@wur.nl.
One of the main unresolved problems in policy making is the step from scale issues to effective governance. What is appropriate for a lower level, such as a region or location, might be considered undesirable at a global scale. Linking scaling to governance is an important issue for the improvement of current environmental management and policies. Whereas social–ecological science tends to focus on adaptive behavior and aspects of spatial ecological data, new institutional economics focuses more on levels in institutional scales and temporal dimensions. Consequently, both disciplines perceive different scaling challenges while aiming at a similar improvement of effective governance. We propose that future research needs to focus on four themes:...
Tipo: Peer-Reviewed Reports Palavras-chave: Combined system perspective; Governance; New institutional economics; Scaling; Social– Ecological sciences.
Ano: 2011
Imagem não selecionada

Imprime registro no formato completo
Geometrical similarity analysis of photosynthetic light response curves, light saturation and light use efficiency OAK
Koyama, Kohei; Kikuzawa, Kihachiro.
Light absorption and use efficiency (LAUE mol mol−1, daily gross photosynthesis per daily incident light) of each leaf depends on several factors, including the degree of light saturation. It is often discussed that upper canopy leaves exposed to direct sunlight are fully light-saturated. However, we found that upper leaves of three temperate species, a heliophytic perennial herb Helianthus tuberosus, a pioneer tree Alnus japonica, and a late-successional tree Fagus crenata, were not fully light-saturated even under full sunlight. Geometrical analysis of the photosynthetic light response curves revealed that all the curves of the leaves from different canopy positions, as well as from the different species, can be considered as different parts of a single...
Palavras-chave: Scaling; Big leaf model; Helianthus tuberosus; Alnus japonica; Fagus crenata.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4482
Imagem não selecionada

Imprime registro no formato completo
In modelling effects of global warming, invalid assumptions lead to unrealistic projections ArchiMer
Lefevre, Sjannie; Mckenzie, David J.; Nilsson, Goeran E..
Tipo: Text Palavras-chave: Climate change; Fish; Growth; Metabolism; Modelling; Oxygen uptake; Scaling; Warming.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00426/53762/54697.pdf
Imagem não selecionada

Imprime registro no formato completo
MANDIBULAR ALLOMETRY IN HYDROCHOERUS HYDROCHAERIS (LINNAEUS, 1766) (HYDROCHERINAE, CAVIIDAE) Pap. Avulsos de Zool. (São Paulo)
PARÉS-CASANOVA,PERE MIQUEL.
ABSTRACT The mammalian masticatory apparatus is a highly plastic region of the skull and thus subjected to singular ontogenetic trajectories. Here we present the first descriptive allometric pattern study of mandible among the capybara (Hydrochoerus hydrochaeris), based on the study of 37 specimens. Allometric changes in shape were analyzed using geometric morphometrics techniques and the pattern of allometry was visualized. A multivariate regression of the shape component on size, estimated by the logarithm of centroid size, appeared as highly significant. Therefore, a major component of shape variation in these mandibles is related to the attainment of adult size (i.e., growth).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capybara; Jaw; Ontogeny; Rodentia; Scaling.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017003500451
Imagem não selecionada

Imprime registro no formato completo
Models projecting the fate of fish populations under climate change need to be based on valid physiological mechanisms ArchiMer
Lefevre, Sjannie; Mckenzie, David J.; Nilsson, Goran E..
Some recent modelling papers projecting smaller fish sizes and catches in a warmer future are based on erroneous assumptions regarding (i) the scaling of gills with body mass and (ii) the energetic cost of 'maintenance'. Assumption (i) posits that insurmountable geometric constraints prevent respiratory surface areas from growing as fast as body volume. It is argued that these constraints explain allometric scaling of energy metabolism, whereby larger fishes have relatively lower mass-specific metabolic rates. Assumption (ii) concludes that when fishes reach a certain size, basal oxygen demands will not be met, because of assumption (i). We here demonstrate unequivocally, by applying accepted physiological principles with reference to the existing...
Tipo: Text Palavras-chave: Aerobic scope; Gill surface area; Growth; Metabolism; Oxygen consumption; Respiration; Scaling.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00395/50621/51449.pdf
Imagem não selecionada

Imprime registro no formato completo
Scale and ecosystem services: how do observation, management, and analysis shift with scale—lessons from Québec Ecology and Society
Raudsepp-Hearne, Ciara; McGill University; ciara.rh@gmail.com; Peterson, Garry D; Stockholm Resilience Centre, Stockholm University; garry.peterson@su.se.
Ecosystem service assessment and management are shaped by the scale at which they are conducted; however, there has been little systematic investigation of the scales associated with ecosystem service processes, such as production, benefit distribution, and management. We examined how social-ecological spatial scale impacts ecosystem service assessment by comparing how ecosystem service distribution, trade-offs, and bundles shift across spatial scales. We used a case study in Québec, Canada, to analyze the scales of production, consumption, and management of 12 ecosystem services and to analyze how interactions among 7 of these ecosystem services change across 3 scales of observation (1, 9, and 75 km²). We found that ecosystem service...
Tipo: Peer-Reviewed Reports Palavras-chave: Covariance; Ecosystem service bundles; Mont Saint-Hilaire; Problem of fit; Scaling; Social-ecological; Spatial; Trade-offs.
Ano: 2016
Imagem não selecionada

Imprime registro no formato completo
Scaling of coastal phytoplankton features by optical remote sensors: comparison with a regional ecosystem model ArchiMer
Druon, Jean-noel; Loyer, S; Gohin, Francis.
Different scales of hydrological and biological patterns of the Bay of Biscay are assessed using space-borne and airborne optical remote sensing data, field measurements and a 3-dimensional biophysical model. If field measurements provide accurate values on the vertical dimension, ocean colour data offer frequent observations of surface biological patterns at various scales of major importance for the validation of ecosystem modelling. Although the hydrobiological model of the continental margin reproduces the main seasonal variability of surface biomass, the optical remote sensing data have helped to identify low grid resolution, input inaccuracies and neglect of swell-induced erosion mechanism as model limitations in shallow waters. Airborne remote...
Tipo: Text Palavras-chave: Bay of Biscay; Models; Scaling; Remote sensing; Satellite observation; Phytoplankton.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-953.pdf
Imagem não selecionada

Imprime registro no formato completo
Scaling of semivariograms and the kriging estimation of field-measured properties Rev. Bras. Ciênc. Solo
Vieira,S. R.; Tillotson,P. M.; Biggar,J. W.; Nielsen,D. R..
Two methods were evaluated for scaling a set of semivariograms into a unified function for kriging estimation of field-measured properties. Scaling is performed using sample variances and sills of individual semivariograms as scale factors. Theoretical developments show that kriging weights are independent of the scaling factor which appears simply as a constant multiplying both sides of the kriging equations. The scaling techniques were applied to four sets of semivariograms representing spatial scales of 30 x 30 m to 600 x 900 km. Experimental semivariograms in each set successfully coalesced into a single curve by variances and sills of individual semivariograms. To evaluate the scaling techniques, kriged estimates derived from scaled semivariogram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semivariogram; Scaling; Kriging; Spatial variability.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831997000400001
Imagem não selecionada

Imprime registro no formato completo
Spatial Trends of Genetic Variation of Domestic Ruminants in Europe Inra
Laloë, D.; Moazami-Goudarzi, K.; Lenstra, J.A.; Marsan, P.A.; Azor, P.; Baumung, R.; Bradley, D.G.; Bruford, M.W.; Canon, J.; Dolf, G.; Dunner, S.; Erhardt, G.; Hewitt, G.; Kantanen, J.; Obexer-Ruff, G.; Olsaker, I.; Rodellar, C.; Valentini, A.; Wiener, P.; INRA, Institut National de la Recherche Agronomique (FRA); European Cattle Genetic Diversity Consortium (INT).
The introduction of livestock species in Europe has been followed by variousgenetic events, which created a complex spatial pattern of genetic differentiation. Spatialprincipal component (sPCA) analysis and spatial metric multidimensional scaling (sMDS)incorporate geography in multivariate analysis. This method was applied to threemicrosatellite data sets for 45 goat breeds, 46 sheep breeds, and 101 cattle breeds fromEurope, Southwest Asia, and India. The first two sPCA coordinates for goat and cattle, andthe first sPCA coordinate of sheep, correspond to the coordinates of ordinary PCAanalysis. However, higher sPCA coordinates suggest, for all three species, additionalspatial structuring. The goat is the most geographically structured species, followed...
Tipo: Journal Article Palavras-chave:  cattle; Sheep; Goat; Diversity; Spatial structure; PCA; SPCA; Multidimensional; Scaling; Moran’s I.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201171b6cbcd&uri=/notices/prodinra1/2011/06/
Imagem não selecionada

Imprime registro no formato completo
THE IMPACT OF INVENTORY ON TUNA PRICE: AN APPLICATION OF SCALING IN THE ROTTERDAM INVERSE DEMAND SYSTEM AgEcon
Chiang, Fu-Sung; Lee, Jonq-Ying; Brown, Mark G..
This study adopted the scaling approach to examine the impacts of inventories on tuna auction prices in Japan using the Rotterdam inverse demand system. The inclusion of two inventory variables in the model only increases the number of parameters by two. Results indicate that frozen tunas are more likely to be close substitutes, fresh and frozen tunas of the same species are also likely to be substitutes, and inventory had significant impacts on auction prices.
Tipo: Journal Article Palavras-chave: Scaling; Rotterdam inverse demand system; Tuna; Inventory; Demand and Price Analysis.
Ano: 2001 URL: http://purl.umn.edu/15445
Registros recuperados: 19
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional