Consulta: subjectFacets:"Portugal"
Registros recuperados: 41
Data/hora: 03/06/2024 08:36:30

Socioeconomics, Policy, or Climate Change: What is Driving Vulnerability in Southern Portugal?
Provedor de dados: 7
Autores: Moors, Eddy J.; ALTERRA; eddy.moors@wur.nl; Fraser, Evan D. G.; Department of Geography, University of Guelph; University of Leeds ; frasere@uoguelph.ca.
Tipo: Peer-Reviewed Reports
Palavras-chave: Climate change; Drought; Portugal; System dynamics modeling; Vulnerability.
Ano: 2011

Climate adaptation, transitions, and socially innovative action-research approaches
Provedor de dados: 7
Autores: Alves, Filipe M; Center for Ecology, Evolution and Environmental Changes (CE3C), University of Lisbon; fmalves@fc.ul.pt; Truninger, Monica; Institute of Social Sciences, University of Lisbon; monica.truninger@ics.ulisboa.pt; Penha-Lopes, Gil; Center for Ecology, Evolution and Environmental Changes (CE3C), University of Lisbon; gppenha-lopes@fc.ul.pt.
Climate change may be a game-changer for scientific research by promoting a science that is grounded in linking the production of knowledge and societal action in a transition toward more sustainable development pathways. Here, we discuss participatory action-research (PAR) as a way of thinking and leading investigations that may promote incremental and transformative changes in the context of climate change adaptation research. Our exploration is addressed in the Portuguese context, where PAR and sustainable transition studies are still marginal, and adaptation processes are a recent topic on political agendas. We describe the characteristics of PAR and use two studies of adaptation to illustrate how research and practice co-evolve through interactive...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptation; Participatory action-research; Portugal; Transitions.
Ano: 2016

Human&amp;#8211;Nature Relationship in Mediterranean Streams: Integrating Different Types of Knowledge to Improve Water Management
Provedor de dados: 7
Autores: Clemente, Adelaide; Environmental Biology Centre, Faculty of Sciences, University of Lisbon; maclemente@fc.ul.pt; Nielsen, Kurt Aagaard; Department of Environmental, Social and Spatial Change, University of Roskilde; aagaard@ruc.dk; Branquinho, Cristina; Environmental Biology Centre, Faculty of Sciences, University of Lisbon; cmbranquinho@fc.ul.pt.
The social and ecological systems of Mediterranean streams are intrinsically linked as a result of long human occupation. In this region, these links vary greatly across small distances due to geomorphology, resulting in great diversity across space, which poses particular challenges for understanding and managing these systems. This demands (i) interdisciplinary integration of knowledge that focuses on the social&amp;#8211;ecological interactions, while according due consideration to the whole; and also (ii) transdisciplinary integration, integrating lay and expert knowledge to understand local specificities. To address these needs&amp;#8212;a focus on interactions and local knowledge&amp;#8212;the research presented here studies the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Co-evolution; Ecological indicators; Interdisciplinary; Local knowledge; Natural resource management; Portugal; Social&amp;#8211; Ecological systems; Transdisciplinary.
Ano: 2009

Oak Persistence in Mediterranean Landscapes: The Combined Role of Management, Topography, and Wildfires
Provedor de dados: 7
Autores: Holmgren, Milena; Resource Ecology Group, Wageningen University; milena.holmgren@wur.nl; Mohren, Godefridus M.J.; Forest Ecology and Forest Management Group, Wageningen University; frits.mohren@wur.nl.
Mediterranean ecosystems have been shaped by a history of human and ecological disturbances. Understanding the dynamics of these social-ecological systems requires an understanding of how human and ecological factors interact. In this study, we assess the combined role of management practices and biophysical variables, i.e., wildfire and topography, to explain patterns of tree persistence in a cork oak  (Quercus suber L.) landscape of southern Portugal. We used face-to-face interviews with landowners to identify the management practices and the incentives that motivated them. We used aerial photographs and a Geographic Information System (GIS) to classify vegetation patch-type transitions over a period of 45 years (1958-2002) and logistic regression to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agroforestry system; Alternative ecosystem state; Cistus ladanifer; Land degradation; Mediterranean; Portugal; Shrub encroachment; Succession; Quercus suber; Vegetation transition.
Ano: 2010

A participação do Piigs no mercado lácteo.
Provedor de dados: 14
Autores: GAMA, D. A.; SIQUEIRA, K. B.
Tipo: Artigo de periódico
Palavras-chave: Irlanda; Itália; Grécia; Espanha; Leite; Produto Derivado do Leite; Mercado; Produtividade; Portugal.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/921775

Water column and recent sediment data on diatoms and coccolithophorids, off Portugal, confirm sediment record of upwelling events
Provedor de dados: 5
Autores: Abrantes, F; Moita, Mt.
Diatom and coccolithophorid abundance and diatom assemblage composition found in the water column along the Portuguese margin, during upwelling and non-upwelling conditions, are compared to the distribution patterns observed in the recent sediments from the same area. The water column results indicate a one order of magnitude increase in phytoplankton biomass during upwelling conditions (summer), with diatoms being the most important contributors. Coccolithophorids, on the contrary, dominate the phytoplankton in winter (non-upwelling), The comparison of the upwelling and non-upwelling spatial distribution of these phytoplankton groups to their sedimentary record reveals the sediment record as a reflection of the upwelling situation, preserving most of its...
Tipo: Text
Palavras-chave: Upwelling; Portugal; Diatomée; Colonne d'eau; Sédiment; Upwelling; Portugal; Diatom; Water column; Sediment.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43630/43253.pdf

Phylogeographic study of the dwarf oyster, Ostreola stentina, from Morocco, Portugal and Tunisia: evidence of a geographic disjunction with the closely related taxa, Ostrea aupouria and Ostreola equestris
Provedor de dados: 5
Autores: Lapegue, Sylvie; Ben Salah, Ines; Batista, Frederico; Heurtebise, Serge; Neifar, L; Boudry, Pierre.
Despite the economic importance of oysters due to the high aquaculture production of several species, the current knowledge of oyster phylogeny and systematics is still fragmentary. In Europe, Ostrea edulis, the European flat oyster, and Ostreola stentina, the Provence oyster or dwarf oyster, are both present along the European and African, Atlantic and Mediterranean, coasts. In order to document the relationship not only between O. stentina and O. edulis, but also with the other Ostrea and Ostreola species, we performed a sequence analysis of the 16S mitochondrial fragment (16S rDNA: the large subunit rRNA-coding gene) and the COI fragment (COI: cytochrome oxidase subunit I). Oysters were sampled from populations in Portugal (two populations), Tunisia...
Tipo: Text
Palavras-chave: Tunisia; Portugal; Marocco; Ostreola stentina; Ostreola equestris; Ostrea aupouria; Phylogeographic study.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1912.pdf

Field measurements of coastal waves and currents in Portugal and Greece
Provedor de dados: 5
Autores: Paillard, Michel; Prevosto, Marc; Barstow, Sf; Soares, Cg.
The MAST II WAVEMOD Project aimed at improving stochastic modelling of ocean waves and currents in coastal waters. In order to supplement existing data, two measurement campaigns were carried our, one on the Atlantic coast of Portugal, and, secondly, on the northern coast of Crete in the Mediterranean. The Portuguese measurements covered 7 months during winter 1993-1994, while off Crete, measurements started early in February 1994 and continued for 10 months, In both sites, two directional Waveriders and one non-directional Waverider were deployed along a transect our from the coast in water depths between 10 and 100 m. In addition, the Mediterranean site also incorporated measurements of mean current velocities. Available satellite data were analysed to...
Tipo: Text
Palavras-chave: Waves; Currents; Portugal; Greece.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00000/10506/66722.pdf

Trends and drivers of marine fish landings in Portugal since its entrance in the European Union
Provedor de dados: 5
Autores: Bueno-pardo, Juan; Pierce, Graham J; Cabecinha, Edna; Grilo, Catarina; Assis, Jorge; Valavanis, Vasilis; Pita, Cristina; Dubert, Jesus-pedreira; Leitão, Francisco; Queiroga, Henrique.
Marine landings in Portugal have decreased at a higher rate than fishing effort in the last 20 years. Identifying the variables driving the quantity and composition of landings is pivotal to understand the dynamics of the fisheries sector, which entails complex social and environmental aspects. In this study, we investigate the main drivers of marine fish landings in continental Portugal between 1989 and 2014. To identify common trends in time series, and quantify the importance of environmental factors, we applied a dynamic factor analysis considering four regions and three types of gear (trawling, purse-seine, and a multi-gear fishery). Our results show the importance of fishing effort as the most relevant factor driving marine landings in Portugal, both...
Tipo: Text
Palavras-chave: Fisheries; Landings; Landings per unit effort; Portugal; Purse-seine; Trawling.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72090/70918.pdf

Water column and recent sediment data on diatoms and coccolithophorids, off Portugal, confirm sediment record of upwelling events
Provedor de dados: 5
Autores: Abrantes, F; Moita, Mt.
Diatom and coccolithophorid abundance and diatom assemblage composition found in the water column along the Portuguese margin, during upwelling and non-upwelling conditions, are compared to the distribution patterns observed in the recent sediments from the same area. The water column results indicate a one order of magnitude increase in phytoplankton biomass during upwelling conditions (summer). with diatoms being the most important contributors. Coccolithophorids, on the contrary, dominate the phytoplankton in winter (non-upwelling). The comparison of the upwelling and non-upwelling spatial distribution of these phytoplankton groups to their sedimentary record reveals the sediment record as a reflection of the upwelling situation, preserving most of its...
Tipo: Text
Palavras-chave: Upwelling; Portugal; Diatomée; Colonne d’eau; Sédiment; Upwelling; Portugal; Diatom; Water column; Sediment.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43613/43915.pdf

Composition en cires, triglycérides, protéines et sucres du mésozooplancton
Provedor de dados: 5
Autores: Alayse-danet, Anne-marie; Daniel, Jean-yves; Le Coz, Jean-rene.
Analyses effectuées sur le zooplancton total des pêches verticales au WP2 et sur des animaux triés à partir des pêches horizontales (Campagne RCA sur les côtes Atlantiques du Portugal). On ne signale pas de différence significative entre la composition biochimique des populations du large et de la côte
Tipo: Text
Palavras-chave: Zooplancton; Milieu marin; Composition chimique; Glucide; Cire animale; Triglycéride; Protéine; Océan Atlantique Nord; Upwelling; Méiofaune; Portugal; France; Zone côtière; Zooplankton; Marine environment; Chemical composition; Carbohydrate; Animal wax; Triglyceride; Proteins; North Atlantic; Upwelling; Meiofauna; Portugal; France; Coastal zone.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00189/29976/28429.pdf

Rapport de mission sur les récifs artificiels en Espagne et au Portugal - 12-23 avril 1999
Provedor de dados: 5
Autores: Dao, Jean-claude; Lacroix, Denis; Veron, Gerard.
L'Espagne et le Portugal sont de gros consommateurs de produits de la mer avec 42 et 60 kg par habitant et par an, respectivement. Ces deux pays accueillent également un important flux de tourisme, principalement sur les régions côtières. Enfin, comme le reste des pays européens, l'Espagne et le Portugal sont confrontés à une stagnation des apports de la pêche malgré l'accroissement de l'effort, y compris dans les petits fonds (moins de 50 m), normalement interdits de chalutage. C'est dans ce contexte que l'Espagne et le Portugal ont engagé depuis une douzaine d'années des programmes d'immersion de récifs à une échelle importante: - 87 projets réalisés, plus une dizaine en cours de mise en oeuvre - environ 973 km2 de zones protégées du chalutage illégal -...
Tipo: Text
Palavras-chave: Récif artificiel; Repeuplement; Espagne; Portugal.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00142/25302/23374.pdf

Local fishermen's perceptions of the usefulness of artificial reef ecosystem services in Portugal
Provedor de dados: 5
Autores: Ramos, Jorge; Lino, Pedro G.; Himes-cornell, Amber; Santos, Miguel N.
Proponents of artificial reef (AR) deployment are often motivated by the usefulness of such structures. The usefulness of ARs is related to their capability of providing ecosystem services/additional functions. We present two distinct Portuguese AR case studies: (1) The Nazare reef off the central coast of Portugal and (2) the Oura reef off the Algarve coast. Semi-structured interviews were conducted with local fishermen in the fishing towns of Nazare and Quarteira pre-and post-AR deployment. The main focus of the interviews was to understand fishermen's perception of AR usefulness (or lack thereof) in terms of nine ecosystem services/additional functions potentially provided by the ARs. We tested the null hypothesis that ARs do not provide additional...
Tipo: Text
Palavras-chave: Artificial reefs; Direct use value; Stakeholders; Ecosystem services; Indirect use value; Local fishermen; Likert scales; Portugal; Perception.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00479/59041/62432.pdf

Supply and larval traits at metamorphosis of a coastal marine invertebrate with a bi-phasic life cycle under contrasting oceanographic conditions
Provedor de dados: 5
Autores: Rey, Felisa; Silva Neto, Gina M.; Bueno-pardo, Juan; Bispo, Regina; Calado, Ricardo.
Patterns of larval supply and larval condition at metamorphosis play key roles in the structure and dynamics of marine populations. Hence, biological and environmental conditions driving the dispersion of larval individuals, shape early life phenotypes, and influence their survival and post-settlement success. We performed a study over two consecutive years at Ria de Aveiro (Portugal), a coastal lagoon influenced by upwelling regimens in the North-eastern Atlantic. This study assessed the effect of contrasting oceanographic conditions on larval supply and larval traits at metamorphosis of the green crab Carcinus maenas. Crab megalopae were daily sampled and monitored in the laboratory until metamorphosis. Environmental conditions experienced by larvae in...
Tipo: Text
Palavras-chave: Carcinus maenas; Bi-phasic life cycles; Invertebrate larvae; Phenotypic variations; Time series; Upwelling; East Atlantic; Portugal; Ria de Aveiro.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00514/62599/66957.pdf

Speciation in Cyprinidae of the Iberic Peninsula.
Provedor de dados: 5
Autores: Almaca, Carlos.
Coming from Oriental Asia and Siberia, the Cyprinidae reached the Iberic Peninsula probably at the end of the Oligocene. Their populations bore speciation processes which led to the formation of a fauna rich in endemic species and subspecies. Populations of two of the genera Barbus and Pseudophoxinus reached Northwestern African forming there several endemic species. Concerning the speciation forms, it is probable that the allopatric form, whether by foundation effect or by subdivision, played an important part. Pyrenees and Mediterranean Sea settled probably efficient barriers for the Iberic Cyprinidae isolation. The present geographical repartition of Cyprinidae in Iberic Peninsula suggests that altitude lines and glaciations which reached the north of...
Tipo: Text
Palavras-chave: Portugal; Spain; Cyprinidae; Biogeography; Speciation.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-1997.pdf

Drastic population size change in two populations of the Golden-striped salamander over a forty year period - are eucalypt plantations to blame?
Provedor de dados: 16
Autores: Arntzen, J.W.
Over the last half century the Iberian peninsula has seen the large scale planting of exotic gum trees (Eucalyptus sp.) therewith reducing space for native wildlife. An additional effect of the gum tree plantations may be the lowering of the water table in adjacent streams, to which amphibian species with a larval niche in the running sections of small streams would be especially susceptible. In northwestern Iberia that niche is occupied by the Golden-striped salamander, Chioglossa lusitanica. I here report on the demographic trends of two C. lusitanica populations over a forty year period, in two areas of one mountain range near Porto in northwestern Portugal. In both areas advantage was taken of the migration pattern of C. lusitanica to sites for...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibian decline; Chioglossa lusitanica; Demographic modelling; Gum tree; Iberia; Monoculture; Portugal; Urodela; Vortex; 42.82.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/569285

A new species of Torymus Dalman, 1820 (Hymenoptera: Torymidae), with additions and corrections to the revision of the European species
Provedor de dados: 16
Autores: Gijswijt, M.J.
Torymus interruptus spec. nov. from southern Portugal is described. A list of additions and corrections to the revision to the European species (Graham &amp; Gijswijt, 1998) is added. The form of Torymus tipulariarum (Zetterstedt, 1838) and the “species indet.” as mentioned in the key to females, are synonymized with typical T. tipulariarum and the species is redescribed with the use of annotations by the late M. de Vere Graham.
Tipo: Article / Letter to the editor
Palavras-chave: Chalcidoidea; Torymidae; Torymus; New species; Portugal; 42.75.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/216028

On Cernuella virgata (Da Costa, 1778) and two Iberian Xerosectaspecies (Mollusca: Gastropoda Pulmonata: Hygromiidae)
Provedor de dados: 16
Autores: Gittenberger, E.
On the basis of a conchological study, taking anatomical data from the literature into account, four hygromiid species, sensu Ortiz de Zarate y Lopez, are reduced to three, viz. Cernuella virgata (Da Costa), Xerosecta promissa (Westerlund) and X. reboudiana (Bourguignat). Diagnostic shell characters are discussed and illustrated, and synonymy lists are given.
Tipo: Article / Letter to the editor
Palavras-chave: Hygromiidae; Cernuella; Xerosecta; Taxonomy; Spain; Portugal; 42.73.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/318631

Digging in the graveyard of synonymy, in search of Portuguese species of Candidula Kobelt, 1871 (Mollusca: Gastropoda Pulmonata: Hygromiidae)
Provedor de dados: 16
Autores: Gittenberger, E.
Next to the wide-spread Candidula gigaxii (Pfeiffer, 1848) and C. intersecta (Poiret, 1801), four endemic Candidula species are reported from Portugal and characterized conchologically, viz. C. belemensis (Servain, 1880) (provisionally), C. codia (Bourguignat, 1859), C. olisippensis (Servain, 1880) and C. setubalensis (Pfeiffer, 1850). Several nominal taxa are classified in the synonymy of these six species, after topotypes (that might be syntypes) or lectotypes.
Tipo: Article / Letter to the editor
Palavras-chave: Hygromiidae; Candidula; Taxonomy; Portugal; 42.73.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/319316

Four new species of Pteromalus Swederus (Hymenoptera: Chalcidoidea: Pteromalidae) and redescriptions of three other species
Provedor de dados: 16
Autores: Gijswijt, M.J.
A key to the European species of the Pteromalus altus group is presented. The relationship between this group and species of the genus Euphorbia (Euphorbiaceae) is confirmed. One new species: P. villosae, associated with Euphorbia villosa Waldst. &amp; Kit.is presented. Two new species of the albipennis group: Pteromalus almeriensis and P. costulata are presented. In addition one species of the P. vibulenus group: P. tethys is added. Information on P. sylveni Hedqvist, P. osmiae Hedqvist and P. discors Graham is given.
Tipo: Article / Letter to the editor
Palavras-chave: Chalcidoidea; Pteromalidae; Pteromalus; New species; Redescriptions; Spain; Portugal; France; Greece; Euphorbia; 42.75.
Ano: 1999
URL: http://www.repository.naturalis.nl/record/215091

Further observations on North African and South Iberian Bathyporeia (Crustacea, Amphipoda), with the description of a new species
Provedor de dados: 16
Autores: Udekem d’Acoz, C. d'; Echchaoui, H.M.C.; Menioui, M.
A new species of amphipod, Bathyporeia watkini sp. nov. from the Atlantic coasts of North Africa is described. This very characteristic species is abundant in some lagoons and estuaries near 28°N. New morphological information on B. elkaimi d’Udekem d’Acoz and Menioui, 2004 is given after specimens that were recently collected on the Atlantic coasts of southern Spain and South Portugal. The male of B. ledoyeri d’Udekem d’Acoz and Menioui, 2004 is described for the first time and new records of North African B. guilliamsoniana (Bate, 1857) and B. chevreuxi d'Udekem d'Acoz and Vader, 2005a are discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Bathyporeia; Crustacea; Amphipoda; Taxonomy; North Africa; Spain; Portugal; Eastern Atlantic; 42.74.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/209653

Gammaridea and Caprellidea (Crustacea — Amphipoda) of the Portuguese south-western continental shelf: taxonomy and distributional ecology
Provedor de dados: 16
Autores: Marques, João Carlos; Bellan-Santini, Denise.
Amphipods from the Portuguese south and south-western continental shelf were studied with regard to the species inventory, distribution, and ecology. This study allowed the identification of 113 species, belonging to 52 genera; of these species 28 are recorded for the first time along the Portuguese coast. Two species, Ampelisca heterodactyla Schellenberg, 1925, and A. latifrons Schellenberg, 1925, are redescribed. The latter is different from the Ampelisca named latifrons by Ledoyer in 1972 and 1982. The absolute frequencies and abundances of the species, and their distribution in terms of bathymetry and type of substrate are also analysed. The most frequent and abundant species also presented wide ranges of vertical distribution. In addition, these...
Tipo: Article / Letter to the editor
Palavras-chave: Gammaridea; Caprellidea; Taxonomy; Distribution; Ecology; Portugal.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/504578

&lt;i&gt;Fosliella farinosa&lt;/i&gt; (Lamouroux) Howe var. &lt;i&gt;chalicodictya&lt;/i&gt; Taylor (Rhodophyceae-Cryptonemiales) et &lt;i&gt;Lophosiphonia scopulorum&lt;/i&gt; (Harvey) Womersley (Rhodophyceae-Ceramiales) récoltées en Méditerranée nord-occidentale
Provedor de dados: 27
Autores: Coppejans, E.
&lt;i&gt;Fosliella farinosa&lt;/i&gt; (Lamour.) Howe var. &lt;i&gt;chalicodictya&lt;/i&gt; Taylor has been described in 1939 after material from the Caribbean Sea. It has never been mentioned since the &lt;i&gt;descriptio princeps&lt;/i&gt;. We found it sometimes while assorting phytosociological relevés from Banyuls and Port-Cros (France). &lt;i&gt;Lophosiphonia scopulorum&lt;/i&gt; (Harv.) Womersl., described from Australia, has recently been mentioned by Ardre (1970) along the Portuguese coasts. We noted this species at Banyuls. Both taxa are new for the Mediterranean Sea; the first one is new for the French algological flora.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ceramiales; Fosliella farinosa (Lamouroux) Howe var. Chalicodictya Taylor; Rhodophyceae; Caribbean Region; France; Portugal.
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3546

Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries
Provedor de dados: 27
Autores: Middelburg, J.J.; Nieuwenhuize, J.
Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using &lt;sup&gt;15&lt;/sup&gt;N-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 µmol N l&lt;sup&gt;-1&lt;/sup&gt;h&lt;sup&gt;-1&lt;/sup&gt; and 0.00025 to 0.25 µmol N l&lt;sup&gt;-1&lt;/sup&gt; h&lt;sup&gt;-1&lt;/sup&gt;, respectively, and differed significantly between and within estuaries. Analysis of nitrogen uptake using the relative preferential index (RPI) indicated ammonium to be the preferred substrate. The turnover times of particulate nitrogen (0.7 to 31 d) and dissolved ammonium (0.1 to 27 d) were similar to or shorter than estuarine-water residence times, whereas turnover times of dissolved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ANE; Ems Estuary ANE; France; Gironde Estuary ANE; France; Pays de Loire; Loire Estuary ANE; Netherlands; Rhine estuary ANE; Netherlands; Westerschelde ANE; Portugal; Douro Estuary.
Ano: 2000
URL: http://www.vliz.be/imisdocs/publications/144317.pdf

Comparing the Productive Efficiency of Cooperatives and Private Enterprises: The Portuguese Wine Industry as a Case Study
Provedor de dados: 31
Autores: Barros,   Carlos Pestana; Santos,   J.C. Gomes.
This paper compares the efficiency of cooperatives and private enterprises in the Portuguese wine industry, employing data envelopment analysis (DEA). The use of DEA for the analysis of comparative efficiency within a sector is a key tool in evaluating organizational competitiveness. Competitiveness should be based on benchmarking the different types of organizations that comprise the viniculture sector. We conclude that Portuguese wine cooperatives, on average, are more efficient than their private counterparts. Economic implications arising from the study are discussed.
Tipo: Journal Article
Palavras-chave: Cooperatives; Private enterprises; Technical efficiency; DEA; Wine industry; Portugal; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/58683

Consumer and Supply Chain Dynamics in the Portuguese Organic Milk Market
Provedor de dados: 31
Autores: Rosa,   Rui; Mili,   Samir; Briz,   Julian.
This study explores consumer demand for organic milk products (OMP) and prospective developments in OMP supply chain in Portugal. Consumer demand is approached through a survey accomplished with a stratified sample of 625 consumers from the Porto Metropolitan area (north Portugal), whose population provides a broad representation of Portuguese. Likely future developments in the Portuguese OMP supply chain are established for 2015 time horizon through the Delphi technique, using a panel of 27 qualified experts from different professional backgrounds. Results show inter alia that there are among consumers significant lack of knowledge and conceptual distortion about the organic notion. Cluster analysis has led to the detection of three differentiated...
Tipo: Conference Paper or Presentation
Palavras-chave: Organic milk; Consumer behaviour; Supply chain; Portugal; Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/59208

Institutions of Sustainability and Multifunctional Landscapes: Lessons from the Case of the Algarve
Provedor de dados: 31
Autores: Thiel,   Andreas.
The paper uses function analysis to complement the analytical framework Institutions of Sustainability and to apply it for the analysis of the role of institutions for the multifunctionality of landscapes. This combination of conceptual tools is evaluated through their application to the case of landscape development in a sub-region of the Algarve, Portugal. In view of this case study it is suggested to complement the Institutions of Sustainability framework: case and transaction specific contextual factors should be included. The paper suggests to look at cross-jurisdictional agency features, cross-function, -transaction and -institutional commonalities, and interconnections as well as to include a dynamic dimension of institutional and physical time lags...
Tipo: Working or Discussion Paper
Palavras-chave: Multifunctional landscape; Institutions; Portugal; European integration; Institutional and Behavioral Economics; Resource /Energy Economics and Policy; N54; Q56; O18.
Ano: 2006
URL: http://purl.umn.edu/18844

Typology of the Portuguese Farm Holdings and Taxation Regimes
Provedor de dados: 31
Autores: Godinho,   Maria de Lurdes Ferro; Coelho,   Maria Leonor Macedo de Seabra.
The study describes the evolution, since the Portuguese accession to the European Community, in 1986, of the different types of farm holdings (household-farms, corporations, co-operatives and other legal forms), using the Agricultural Census data. In addition, the experience of agricultural taxation in Portugal in the context of the ongoing policy debate about the tax structure and tax reform affecting agricultural producers is addressed for different categories of farms. The research also examines the problems associated with tax regimes. A major problem has been the measurement of the actual taxable farm income. The different measures to estimate farm income are explained for the various taxation regimes.
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Holdings; Legal Personality; Portugal; Taxes; Agricultural and Food Policy.
Ano: 2005
URL: http://purl.umn.edu/24433

Coping with ex ante Regulations and ex post Liability Rules for Planting Bt-maize – The Portuguese Experience
Provedor de dados: 31
Autores: Skevas,   Theodoros; Fevereiro,   P.; Wesseler,   Justus.
This study investigates the attitude and practices of GM and non-GM maize farmers in Portugal. Thirty seven GM maize farmers were interviewed representing 22.5% of the total number of GM maize notifications in the country. Additionally, 66 non-GM maize farmers were surveyed in an attempt to investigate their opinion on the Bt technology, its viability and its future. The most interesting finding is that almost half of all the surveyed maize farmers (GM and non-GM) stated that the ex ante regulations are rigid and difficult to apply. On the contrary, the ex post tort liability rules are very clear and provide the appropriate security for the continuation of the GM maize cultivation.
Tipo: Conference Paper or Presentation
Palavras-chave: Coexistence; Bt-maize; Portugal; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44189

Consumer Perceptions and Attitudes Towards Food Safety in Portugal
Provedor de dados: 31
Autores: Ventura-Lucas,   Maria Raquel.
The recent food crises and its great diffusion through the media had as consequence a reduction of the European consumer's confidence, in general, and of the Portuguese ones in particular, in the products that they buy and consume. These events also served to disclose some of the existing problems in the current marketing chain, in which many sectors result to have low, or no transparency or unknown ones to the consumers. For moreover, these crises had demonstrated that science and technology, in set with the governmental regulation do not offer guarantees that the risks associated with food have acceptable levels. All these questions triggered the interest of researchers to study the impact of food safety related issues on consumer behaviour. The...
Tipo: Conference Paper or Presentation
Palavras-chave: Food safety; Consumer behaviour; Perceptions; Attitudes; Portugal; Food Consumption/Nutrition/Food Safety.
Ano: 2004
URL: http://purl.umn.edu/24986

Farm Structure and the Effects of Agri-Environmental Programs: Results from a Matching Analysis for European Countries
Provedor de dados: 31
Autores: Pufahl,   Andrea; Weiss,   Christoph R.
This paper extends previous research (Pufahl and Weiss, 2009) and applies a semi-parametric propensity score matching approach to evaluate the effects of agrienvironment (AE) programs on input use and farm output of individual farms in eight Member States of the European Union. We find substantial differences in treatment effects between countries. The analysis reveals significant effects of AE participation on production (Germany, France) and farm profits (France, Ireland, United Kingdom). AE participation sporadically reduces the intensity of land use as measured by the purchase of farm chemicals (fertilizer, pesticide) and grazing livestock densities. We also find differences in the treatment effect among farms with different farm size (heterogeneous...
Tipo: Conference Paper or Presentation
Palavras-chave: Evaluation; Agri-environment programs; Propensity score matching; Germany; Italy; Spain; France; Portugal; United Kingdom; The Netherlands; EU-15; Agribusiness; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/52997

A Multi-Criteria Approach for Irrigation Water Management
Provedor de dados: 31
Autores: Saraiva,   Joao Paulo; Pinheiro,   Antonio Cipriano.
The major implications that the European Union (EU) Water Framework Directive (WFD) may have in irrigated agriculture were analysed using alternative water policy measures. The consequences of policy change were evaluated in a case study (Baixo Alentejo, Portugal), using a Multi-Criteria Decision Making (MCDM) model that simulates farmers’ preferred behaviour. The study compares the effects of water pricing (volumetric and flat tariffs) and consumption quotas, in farmer’s income, water agency revenues, agricultural employment and water demand for irrigation. Model results indicate that the adjustments in farmer’s responses are dependent on the policy strategy enforced and on the policy level.
Tipo: Journal Article
Palavras-chave: Water Framework Directive; Flat Pricing; Volumetric Pricing; Multi- Objective Programming; Water Management; Portugal.
Ano: 2007
URL: http://purl.umn.edu/42143

Demand for Organic Milk Products in Portugal
Provedor de dados: 31
Autores: Rosa,   Rui; Briz,   Julian; Mili,   Samir.
Milk consumption patterns are changing in Portugal. Factors like convenience, quality and safety increasingly constitute the basis for the Portuguese consumer purchasing decision. Demand for organic milk products (OMP) is emerging while most of these products are supplied by foreign companies. This study explores the demand for OMP in Portugal using both direct market observation and multivariate methods, in particular factor and cluster analysis. It appears that there are specific emerging segments preferring OMP, as they are increasingly concerned by health attributes and environmental protection.
Tipo: Conference Paper or Presentation
Palavras-chave: Organic milk consumption; Market segmentation; Portugal; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2008
URL: http://purl.umn.edu/44330

Sustainability of Local Agri-food Products in the Border Area of Northern Portugal and Castilla-Léon
Provedor de dados: 31
Autores: Baptista,   Alberto; Tiberio,   Luis; Cristovao,   Artur.
Even in relatively peripheral areas, such as the Portuguese-Spanish border regions, agriculture and food systems have changed greatly in the last decades. Traditional agricultural systems have been declining and some products are no longer appreciated, or even tend to become quantitatively insignificant. Not only are producers ageing but their knowledge and know-how along with the local genetic heritage and biodiversity associated with farming are at risk of disappearing. Local products and markets have been progressively integrated into the larger framework of the global food market. Distributors, restaurant owners and consumers in general rely more and more on exogenous food products, despite the undeniable quality of the existing products and the...
Tipo: Conference Paper or Presentation
Palavras-chave: Local agri-food products; Peripheral areas; Portugal; Spain.; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/94925

A agricultura familiar em Portugal: rupturas e continuidades
Provedor de dados: 123
Autores: Carmo,Renato Miguel do.
Em Portugal, as ciências sociais têm estudado a agricultura familiar a partir de um modelo de interpretação dualista que acentua as diferenças inter-regionais, marginalizando, até certo ponto, o significado sociológico de algumas continuidades que se estabeleciam (e se estabelecem) entre as zonas do Norte e do Sul ou entre o Litoral e o Interior. O presente estudo pretende, assim, construir uma perspectiva diferente sobre as modalidades de agricultura familiar em Portugal, procurando identificar, num primeiro momento, uma série de proximidades sociológicas entre os diferentes modos de organização (tradicionais e modernos) das famílias agrícolas e, consequentemente, traçar os eixos para um modelo mais complexo na análise dessas mesmas modalidades.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rural; Pluriactividade; Agricultura familiar; Portugal.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032010000100001

Assigning dates and identifying areas affected by fires in Portugal based on MODIS data
Provedor de dados: 42
Autores: PANISSET,JESSICA; DACAMARA,CARLOS C.; LIBONATI,RENATA; PERES,LEONARDO F.; CALADO,TERESA J.; BARROS,ANA.
ABSTRACT An automated procedure is here presented that allows identifying and dating burned areas in Portugal using values of daily reflectance from near-infrared and middle-infrared bands, as obtained from the MODIS instrument. The algorithm detects persistent changes in monthly composites of the so-called (V,W) Burn-Sensitive Index and the day of maximum change in daily time series of W is in turn identified as the day of the burning event. The procedure is tested for 2005, the second worst fire season ever recorded in Portugal. Comparison between the obtained burned area map and the reference derived from Landsat imagery resulted in a Proportion Correct of 95.6%. Despite being applied only to the months of August and September, the algorithm is able to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burned area; MODIS; Portugal; Remote sensing.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401487

Occurrence of Listeria monocytogenes in silages assessed by fluorescent in situ hybridization
Provedor de dados: 45
Autores: Oliveira,M.; Guerra,M.; Bernardo,F.
Avaliou-se a qualidade microbiológica da silagem produzida em Portugal e otimizaram-se alguns aspectos relacionados com a eficácia de detecção de Listeria monocytogenes mediante protocolo baseado na técnica de hibridação in situ fluorescente (FISH) para detecção directa desse microrganismo em amostras de silagens. O protocolo foi aplicado a 74 amostras, em simultâneo com o método bacteriológico convencional. Este último permitiu a detecção de L. monocytogenes em 11 silos (15%). Por meio do protocolo FISH, observou-se que 22 silos (29,7%) se encontravam contaminados. O método FISH apresentou precisão (77,0%), especificidade (92,5%) e sensibilidade (72,7%) elevadas, sendo adequado para a análise microbiológica presuntiva de silagens, uma vez que é um método...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Silage; Listeriosis; Fluorescent in situ hybridization; Listeria monocytogenes; Portugal.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000100038

Situação epidemiológica da leucose bovina enzoótica em Portugal entre os anos de 1995 e 2005
Provedor de dados: 45
Autores: Poeta,P.; Coelho,A.C.; Rodrigues,J.
This paper evaluated the epidemiological situation of the enzootic bovine leucosis from 1995 to 2005, in Portugal. With exception of the South region, Algarve, the disease was distributed throughout the country, being more prevalent in the north, between Douro and Minho and Trás-os-Montes, than in the centre. A decrease in prevalence and incidence of the infection throughout the studied period was also observed.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Leucose bovina; Epidemiologia; Portugal.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000500030

Patterns of avian malaria in tropical and temperate environments: testing the "The enemy release hypothesis"
Provedor de dados: 49
Autores: Antonini,Yasmine; Lobato,Debora Nogueira Campos; Norte,Ana Cláudia; Ramos,Jaime A.; Moreira,Patrícia de Abreu; Braga,Erika Martins.
Abstract: According to the enemy release hypothesis (ERH) the spread of invasive species will be facilitated by release from their enemies as they occupy new areas. However, the ERH has rarely been tested by comparing populations of native (non-invasive, long established) species with expanding or shifting ranges, to the same species as invasive in another area. We tested the ERH with respect to blood parasite levels (prevalence and intensity of Plasmodium spp. and Haemoproteus spp.) of (a) two closely related, widely distributed species of thrush (Turdus leucomelas and T. merula), and (b) an invasive sparrow (Passer domesticus) whose range has expanded from the Old World to the New World since the 18th century. A total of 158 birds were sampled in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Portugal; Brazil; Turdus; House sparrow; Invasive bird; Range expansion.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400204

Molecular characterization of vanA-containing Enterococcus from migratory birds: song thrush (Turdus philomelos)
Provedor de dados: 58
Autores: Silva,Nuno; Igrejas,Gilberto; Felgar,Ana; Gonçalves,Alexandre; Pacheco,Rui; Poeta,Patrícia.
Vancomycin-resistant enterococci (VRE) were detected in two faecal samples (1.3%) of song thrush in Portugal. vanA isolates showed high level vancomycin/teicoplanin resistance, as well as resistance to ciprofloxacin, quinupristin-dalfopristin and cloranfenicol. Thrush can be a reservoir of VRE and transmit these resistant bacteria to other animals including humans.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Migratory birds; VanA-containing enterococci; Antibiotic resistance; Portugal.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300026

Cross-cultural adaptation of Hypertension Knowledge Test into European Portuguese
Provedor de dados: 60
Autores: Cabral,Ana C.; Moura-Ramos,Mariana; Castel-Branco,Margarida; Caramona,Margarida; Fernandez-Llimos,Fernando; Figueiredo,Isabel V.
ABSTRACT We aim to validate a European-Portuguese version of the Hypertension Knowledge Test (HKT) questionnaire and examine its factorial structure with a confirmatory factor analysis (CFA). A process of translation and back-translation was performed. A cross-sectional study was developed in which all adult patients taking at least one antihypertensive drug were invited to participate. Data on personal and family history were collected, and the HKT, Strelec, and the Batalla questionnaires were administered. We enrolled 304 patients with a mean age of 68.12±10.83 years. The mean score of HKT was 15.33±2.79. CFA indicated that the construct being tested was unidimensional, and Cronbach’s alpha (α=0.65) showed that the instrument had an acceptable internal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Health Knowledge/attitudes/practice; Hypertension/prevention and control; Psychometrics; Surveys and questionnaires/standards; Portugal.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000400608