Consulta: subjectFacets:"Population"
Registros recuperados: 75
Data/hora: 01/06/2024 15:21:31

The Roles and Movements of Actors in the Deforestation of  Brazilian Amazonia
Provedor de dados: 7
Autores: Fearnside, Philip M; National Institute for Research in the Amazon-INPA; pmfearn@inpa.gov.br.
Tipo: Peer-Reviewed Insight
Palavras-chave: Deforestation; Migration; Population; Rainforest; Ranching.
Ano: 2008

The effect of reciprocal connections between demographic decision making and land use on decadal dynamics of population and land-use change
Provedor de dados: 7
Autores: Zvoleff, Alexander; San Diego State University, Department of Geography; azvoleff@conservation.org; An, Li; San Diego State University, Department of Geography; lan@mail.sdsu.edu.
Tipo: Peer-Reviewed Reports
Palavras-chave: Coupled human-natural system; Environment; Feedback; Fertility; Land use; Marriage; Population.
Ano: 2014

Resilience, Panarchy, and World-Systems Analysis
Provedor de dados: 7
Autores: Gotts, Nicholas M.; Macaulay Land Use Research Institute; n.gotts@macaulay.ac.uk.
The paper compares two ambitious conceptual structures. The first is the understanding of social-ecological systems developed around the term "resilience," and more recently the term "panarchy," in the work of Holling, Gunderson, and others. The second is Wallerstein's "world-systems" approach to analyzing hierarchical relationships between societies within global capitalism as developed and applied across a broader historical range by Chase-Dunn and others. The two structures have important common features, notably their multiscale explanatory framework, links with ideas concerning complex systems, and interest in cyclical phenomena. They also have important differences. It is argued that there are gaps in both sets of ideas that the other might remedy....
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Adaptive cycle; Cross-scale interaction; Panarchy; Population; Resilience; Technology; World-systems.
Ano: 2007

Towards a mechanistic interpretation of bird migration in South America
Provedor de dados: 68
Autores: Jahn,Alex E.; Levey,Douglas J.; Johnson,Jennifer E.; Mamani,Ana Maria; Davis,Susan E.
Research to date has demonstrated that bird migration is comprised of highly diverse and plastic behavioural patterns. Our objective is to highlight the importance of studying mechanisms underlying these patterns in austral migrants. We focus on the high incidence of overlap in breeding and non-breeding ranges as a particularly thought-provoking pattern. We then explore the opportunities afforded by partial migration theory to elucidate the mechanisms underlying seasonal range overlap. We propose that a mechanistic understanding of migration in South America will both provide a deeper appreciation of the ecology, physiology and evolution of migratory species in the New World, and improve the scientific foundation for their conservation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanism; Partial migration; Population; Range overlap; Tyrannus.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072006000200005

Significant genetic differentiation among populations of Anomalocardia brasiliana (Gmelin, 1791): a bivalve with planktonic larval dispersion
Provedor de dados: 74
Autores: Arruda,Cinthya Cristina Bulhões; Beasley,Colin Robert; Vallinoto,Marcelo; Marques-Silva,Nelane do Socorro; Tagliaro,Claudia Helena.
Four Brazilian populations of Anomalocardia brasiliana were tested for mutual genetic homogeneity, using data from 123 sequences of the mtDNA cytochrome oxidase c subunit I gene. A total of 36 haplotypes were identified, those shared being H3 (Canela Island, Prainha and Acupe) and both H5 and H9 (Prainha and Acupe). Haplotype diversity values were high, except for the Camurupim population, whereas nucleotide values were low in all the populations, except for that of Acupe. Only the Prainha population showed a deviation from neutrality and the SSD test did not reject the demographic expansion hypothesis. Fst values showed that the Prainha and Acupe populations represent a single stock, whereas in both the Canela Island and Camurupim stocks, population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MtDNA; COI; Population; Anomalocardia brasiliana; Conservation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200033

Особенности внутрипопуляционной изменчивости удельной поверхности фитопланктона Одесского региона (Черное море)
Provedor de dados: 13
Autores: Миничева, Г. Г.; Зотов, А. Б.
Анализируется внутрипопуляционная изменчивость удельной поверхности популяций фитопланктона Черного моря в районе Дунай–Днепровского междуречья и прилегающих водоемов и ее взаимосвязь с доминированием видов фитопланктона. Рассмотрены зависимости между сезонной динамикой удельной поверхности разноразмерных популяций фитопланктона и динамикой их структурных показателей: численности и биомассы.
Tipo: Journal Contribution
Palavras-chave: Фитопланктон; Популяции; Сезонная динамика; Phytoplankton; Population; Season dynamic Phytoplankton Phytoplankton http://aims.fao.org/aos/agrovoc/c_13344.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/492

Внутривидовая неоднородность шпрота Sprattus sprattus phalericus (Risso)  (Pisces: Clupeidae) в западной части Чёрного моря.
Provedor de dados: 13
Autores: Зуев, Г. В.; Мельникова, Е. Б.
Изучали внутривидовую дифференциацию шпрота Sprattus sprattus phalericus (Risso) в западной части Черного моря с помощью эколого-географического подхода. На основе полученных результатов о пространственном распределении икры, личинок, молоди и взрослых рыб, миграционном поведении, биологической специфичности, наличии природных изолирующих механизмов и т.д. выделены внутривидовые образования разного ранга. Два из них отвечают требованиям, предъявляемым к популяции как элементарной эволюционной единице – «румынское» и «крымское». Дана оценка их экологического состояния, рассмотрены факторы формирования.
Tipo: Journal Contribution
Palavras-chave: Шпрот; Популяция; Внутривидовая дифференциация; Эколого-географический подход; Чёрное море; Sprat; Population; Intraspecific differentiation; Distribution; Ecological-geographical approach; Black Sea; Популяція; Внутрішньовидова диференціація; Розподіл; Еколого-географічний підхід; Чорне море.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/855

О некоторых закономерностях продукционных процессов в популяциях черноморской мидии (Mytilus  galloprovincialis Lam.), выращиваемой на разных типах искусственных субстратов
Provedor de dados: 13
Autores: Золотницкий, А. П.
Исследованы закономерности протекания продукционных процессов в популяциях мидии (Mytilus galloprovincialis Lam.), выращиваемых на разных типах искусственных субстратах - коллекторах. Показано, что амплитуда и скорость продуцирования биомассы мидии в значительной степени определяются архитектоникой искусственных субстратов, а также начальной плотностью осевшего спата. Дана количественная характеристика продукции, элиминации и стационарной биомассы (урожая) моллюсков в процессе их культивирования в различных районах Черного моря.
Tipo: Journal Contribution
Palavras-chave: Мидия; Популяция; Продукция; Элиминация; Искусственный субстрат; Черное море; Mussel; Population; Production; Elimination; Artificial substratum; Black Sea.
Ano: 2006
URL: http://repository.ibss.org.ua/dspace/handle/99011/307

Отношение углерод/хлорофилл а как показатель возраста естественных популяций фитопланктона
Provedor de dados: 13
Autores: Чмыр, В. Д.; Сеничева, М. И.
The results of the regular measuring of main structural parameters of phytoplankton in near mouth waters of the Sevastopol Bay are presented: numbers, dimensional composition and biomasses of general its components, carbon and chlorophyll а contents. Analysis of relationship between some structural parameters, and also between them and environment conditions are carried out.
Tipo: Book Section
Palavras-chave: Biomasses of phytoplankton; Chlorophyll a; Population.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1843

Межгодовая изменчивость возрастной структуры популяции мидий Mytilus galloprovincialis в северо-западной части Черного моря
Provedor de dados: 13
Autores: Шурова, Н. М.
Проведен анализ многолетней изменчивости размерно-возрастной структуры поселений мидий в северо-западной части Черного моря. Выявленные межгодовые различия свидетельствуют о том, что в современных экологических условиях на северо-западном шельфе Черного моря продолжаются негативные процессы, которые увеличивают смертность моллюсков и приводят к неуклонному омоложению возрастной структуры их поселений. Это вызывает уменьшение продолжительности жизни черноморской мидии и снижение ее репродукционного потенциала.
Tipo: Journal Contribution
Palavras-chave: Population; Mussels; Long-term changes; The Black Sea; Популяция; Мидии; Черное море Population structure Population structure http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/489

Caracterização geo-ambiental do município de Carica (SE).
Provedor de dados: 14
Autores: RICHE, G. R.; MANTOVANI, L. E.
Trata sobre o municipio de Carica (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Localizacao; Extensao; Sergipe; Carira; Relievo; Hydrography; Localization; Extension; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Climate; Ecology; Geology; Brazil; Population; Soil; Vegetation.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133056

Animais geneticamente importantes nas populações de pedigree das raças Landrace e Large White do Brasil.
Provedor de dados: 14
Autores: SARALEGUI LARRAMBEBERE, W. H.; COSTA, C. N.
bitstream/item/59323/1/CUsersPiazzonDocuments30.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Raça Landrace; Raça Large White; Melhoramento genético.; População; Suíno.; Genetics; Population; Swine.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/435087

Cultivares, épocas de semeadura, populações, densidades e espaçamentos de soja, recomendados para o Estado do Paraná - ano agrícola 1979/80.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
bitstream/item/54027/1/3.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Praticas culturais; Variedade recomendada; Densidade; Brasil; Parana; Soybean; Recommended varieties; Spacing; Cultural methods.; Espaçamento; Época de Semeadura; População; Soja.; Density; Brazil; Population; Sowing date.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/444334

Cultivares de soja 1999.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
bitstream/CNPSO/16207/1/doc123.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Cultivar; Brasil; Soybean; Production.; Densidade de Semeadura; Época de Semeadura; Melhoramento; População; Produção; Soja.; Density; Brazil; Population; Plant breeding; Sowing date; Varieties.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/460383

Recomendações de cultivares de soja, épocas de semeadura, populações, densidades e espaçamentos de soja para o Estado do Paraná, para o ano agricola 1983/84.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
bitstream/item/54021/1/20.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Densidade; Variedade recomendada; Brasil; Parana; Soybean; Cultural methods; Spacing; Recommended variety.; Espaçamento; Época de Semeadura; População; Pratica Cultural; Soja.; Density; Brazil; Population; Sowing date.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/444340

Caracterizacao geo-ambiental do município de Ribeirópolis (SE).
Provedor de dados: 14
Autores: RICHE, G. R.; MANTOVANI, L. E.
Trata sobre o Municipio de Ribeiropolis (SE). Traz a localizacao, extensao, populacao, clima, geologia, vegetacao, relevo , hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Extensao; Localizacao; Sergipe; Ribeiropolis; Extension; Localization; Relievo; Hydrography; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Climate; Ecology; Geology; Brazil; Population; Vegetation.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133057

Recomendações de cultivares, épocas de semeadura, populações, densidade e espaçamentos de soja para o Estado do Paraná no ano agrícola 1981/82.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
bitstream/item/54020/1/10.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Densidade; Variedade recomendada; Brasil; Parana; Soybean; Cultural methods; Spacing; Recommended variety.; Época de Semeadura; Espaçamento; População; Pratica Cultural; Soja.; Density; Brazil; Population; Sowing date.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/444341

Caracterização geo-ambiental do município de Poço Redondo - SE.
Provedor de dados: 14
Autores: RICHE, G. R.; MANTOVANI, L. E.
Trata sobre o municipio de Poco Redondo (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grande unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Localizacao; Extensao; Sergipe; Poco Redondo; Relievo; Hydrography; Localization; Extension; Solo; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Ecology; Geology; Brazil; Population; Vegetation.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133055

Intervalo entre gerações da população de suínos Large White de pedigree do Brasil.
Provedor de dados: 14
Autores: SARALEGUI LARRAMBEBERE, W. H.; COSTA, C. N.
bitstream/item/59327/1/CUsersPiazzonDocuments25.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Raça Large White; Selection.; População; Seleção; Suíno.; Pedigree; Population; Swine.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/435065

Uso de levantamentos aéreos para o manejo de populações silvestres.
Provedor de dados: 14
Autores: MOURÃO, G. de M.; MAGNUSSON, W. E.
Propósitos de manejo de populações silvestres; Problemas de escala em manejo de populações silvestre; Limites de uma população; Escala de manejo; Aplicabilidade; Áreas factíveis de levantamentos aéreos no Brasil; Tipos de aparelhos usados; Levantamentos aéreos; Precisão e acurácia; Análise de dados; Estimativa simples; Estimativa ponderada; Estimativa com probabilidade proporcional ao tamanho.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Animal silvestre; Levantamento aéreo; Management; Aerial survey.; Manejo; População.; Population; Wildlife.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/811116

Recomendações técnicas para a cultura da soja no Paraná 1991/92.
Provedor de dados: 14
Autores: EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária.
A agricultura e Mercosul; Manejo do solo; Rotacao de culturas; Clima; Cultivares; Populacao e densidade de semeadura; Epocas de semeadura; Instalacao da lavoura; Controle de plantas daninhas; Manejo de pragas; Controle de doencas; Colheita; Retencao foliar ("haste verde"); Tecnologia de sementes.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Recomendacao tecnica; Cultivar; Densidade; Epoca; Planta daninha; Controle; Retencao foliar; Brasil; Parana; Soybean; Technical directions; Fertilization; Variety; Weed; Control; Pest; Disease; Fungus; Nematode; Harvest; Seed.; Adubação; Bactéria; Colheita; Doença; Fungo; Manejo; Nematóide; Pratica Cultural; População; Praga; Semeadura; Rotação de Cultura; Semente; Tecnologia; Solo; Vírus.; Soja; Density; Crop rotation; Crop management; Brazil; Population; Plant density; Soil; Sowing date.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/447056

Rebanhos genéticamente importantes para a população Landrace de pedigree do Brasil.
Provedor de dados: 14
Autores: SARALEGUI LARRAMBEBERE, W. H.; FAVERO, J. A.
bitstream/item/59348/1/CUsersPiazzonDocuments13.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Raça Landrace; Melhoramento genético.; População; Suíno.; Breeding; Genetics; Population; Swine.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/435052

Indicações do manejo de pragas para percevejos.
Provedor de dados: 14
Autores: VILLAS BOAS, G. L.; MOSCARDI, F.; CORREA FERREIRA, B. S.; HOFFMANN CAMPO, C. B.; CORSO, I. C.; PANIZZI, A. R.
Epocas de aparecimento; Determinacao da intensidade populacional; Metodos de amostragem; Ocorrencia nas diferentes cultivares; Controle; Biologia; Consideracoes finais.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Controle; Brasil; Soybean; Pest insect; Management; Control; Biology.; Amostragem; Biologia; Inseto; Manejo; Nezara Viridula; Piezodorus Guildinii; População; Praga; Soja.; Euschistus; Heros; Brazil; Population; Sampling.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/460397

Future challenges for good health and well-being.
Provedor de dados: 14
Autores: KIILL, L. H. P.; PORTO, D. D.
Challenges and solutions; Contributions of Embrapa.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Bem estar; Alimentação biofortificada; Saúde; Qualidade de Vida; Alimentação; Population; Human health; Healthy diet; Health foods.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1129111

Recomendações de cultivares, épocas de semeadura, populações, densidades e espaçamentos de soja para o Estado do Paraná no ano agrícola 1982/83.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
bitstream/item/54019/1/18.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Densidade; Espoca de semeadura; Variedade recomendada; Brasil; Parana; Soybean; Cultural methods; Spacing; Recommended variety.; Espaçamento; Pratica Cultural; População; Soja.; Density; Brazil; Population; Sowing date.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/444342

Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport préliminaire 1982
Provedor de dados: 5
Autores: Deslous Paoli, Jean-marc.
Des prélèvements dans le bassin de Marennes-Oléron ont permis de localiser les fortes charges de Crepidula fornicata L. principalement dans le centre du bassin (le long du banc de Charret et dans le courant d'Oléron). En ces deux points la charge fraîche cumulée a été estimée à environ 2 700 tonnes. La structure de population fait apparaître une croissance moyenne de 20, 19, 17 et 12 millimètres respectivement pour les 1ère, 2ème, 3ème et 4ème années avec une variabilité très importante dès la première année. 74,5% des animaux constituent des chaines primaires d'en moyenne six individus fixés sur des coquilles de crépidules mortes. La période de reproduction s'étale vraisemblablement du mois d'avril au mois de septembre et 25% des individus portent des...
Tipo: Text
Palavras-chave: Crepidula fornicata; Population; Croissance; Reproduction; Marennes Oléron.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00092/20356/18017.pdf

Forces, failles et opportunités de la recherche française en écologie trophique
Provedor de dados: 5
Autores: Perga, Marie-elodie; Danger, Michael; Dubois, Stanislas; Fritch, Clementine; Gaucherel, Cedric; Hubas, Cedric; Jabot, Franck; Lacroix, Gerard; Lefebvre, Sebastien; Marmonier, Pierre; Bec, Alexandre.
The French National Institute of Ecology and Environment (INEE) aims at fostering pluridisciplinarity in Environmental Science and, for that purpose, funds ex muros research groups (GDR) on thematic topics. Trophic ecology has been identified as a scientific field in ecology that would greatly benefit from such networking activity, as being profoundly scattered. This has motivated the seeding of a GDR, entitled “GRET”. The contours of the GRET's action, and its ability to fill these gaps within trophic ecology at the French national scale, will depend on the causes of this relative scattering. This study relied on a nationally broadcasted poll aiming at characterizing the field of trophic ecology in France. Amongst all the unique individuals that fulfilled...
Tipo: Text
Palavras-chave: Trans-ecosystem; Scientific network; Cleavage; Ecology; Population; Community.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00442/55338/56849.pdf

Long-term changes in density, population structure and growth rate of Tellina tenuis from Dublin Bay, Ireland
Provedor de dados: 5
Autores: Wilson, Jg.
Changes in the Tellina tenuis population in Dublin Bay, Ireland since 1977 are described. Population density at the monitoring site increased from 260 m(-2) (although a maximum density of 548 m(-2) was found nearby) in 1977 to a peak of 434 m(-2) in 1989. Densities recently have been the lowest recorded, around 170 m(-2). These changes do not seem to have been associated with any change in elevation of the site. The population structure has changed considerably, from one dominated by larger, older animals in 1977, when there did not seem to have been any significant recruitment for the previous two years, to one in which recruitment, if not in any great numbers, has at least been more or less regular, with the last two years (1993 and 1994) showing the...
Tipo: Text
Palavras-chave: Tellina tenuis; Long-term; Population; Growth; Ireland.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20396/18063.pdf

L'état des communautés exploitées au large des côtes de France. Application d'indicateurs à l'évaluation de l'impact de la pêche. Bilan 2004 – Edition 2009
Provedor de dados: 5
Autores: Morin, Jocelyne; Bertrand, Jacques; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lobry, Jeremy; Mahe, Jean-claude; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Vaz, Sandrine; Verin, Yves.
Since about twenty years, Ifremer have carried out fishery surveys along the French coasts. A dynamic indicator-based approach to the assessment of multi-stock fisheries has been applied to these data series. Reference points for non-commercial populations and community indicators are seldom available, but reference directions are well established: it is known whether fishing will increase or decrease the indicator, hence the direction that should be avoided. A set of simple indicators of fishing impacts on fish populations and communities were estimated from time-series data provided by scientific surveys (population abundance and average length, community total biomass and number, average length and weight, and size spectrum). Trends in these indicators...
Tipo: Text
Palavras-chave: Communauté; Population; Indicateurs; Campagnes scientifiques; Pêcheries multi spécifiques; Approche écosystémique pour la gestion des pêches.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-7293.pdf

The Paracentrotus lividus populations from the northern Moroccan Atlantic coast: growth, reproduction and health condition
Provedor de dados: 5
Autores: Bayed, Abdellatif; Quiniou, Francoise; Benrha, Ali; Guillou, Monique.
The condition of three intertidal Paracentrotus lividus populations, which inhabit an area between Rabat and Casablanca (Morocco) known by its high wave energy and its substantial anthropogenic disturbances were described. The growth rate of the juvenile sea urchins in this intertidal zone was low compared with more sheltered populations. A sharp increase in the gonad index was observed between January and March at the beginning of a period of algal production, and was concomitant with increases in seawater temperature and food consumption rate. This gonad index increase was followed by a single spawning period occurring between March and June, probably triggered by the phytoplankton bloom induced by upwelling conditions. Larval development in all three...
Tipo: Text
Palavras-chave: Moroccan Atlantic; Growth; Population; Juvenile; Reproduction.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-602.pdf

Estimation du nombre de tortues vertes femelles adultes Chelonia mydas par saison de ponte à Tromelin et Europa (Océan Indien) (1973-1985)
Provedor de dados: 5
Autores: Le Gall, Jean-yves; Bosc, Pierre; Taquet, Marc.
A research programm on the marine green turtle Chelonia mydas nesting on the two major reproduction sites for the species in the Indian Ocean, conducled over last 15 years, included intensive tagging programm. Processing of these lagging data provides estimations of adult female populations {or each site and season from two independent methods. First classical method is the ratio of total number of nests produced over a define time on the mean individual number of nests by female during the same time (November, December, January). The computed mean individual number ranges from 3 to 3.5 obtained over 2 to 3 months. The second method is the multiple capture-recapture method (JOLLY, 1965; SEBER, 1965; MANLY, 1984). Il is an original tentative of applying...
Tipo: Text
Palavras-chave: Tortue verte; Chelonia mydas; Reproduckion; Ponte; Population; Femelles; Marquage; Recapture; Océan Indien.; Marine green turtle; Chelonia mydas; Capture; Recapture; Indian Ocean; Nesting; Populations; Tagging; Reproduction.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00113/22406/20103.pdf

Reduced female gene flow in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Diaz Almela, F; Boudry, Pierre; Launey, Sophie; Bonhomme, Francois; Lapegue, Sylvie.
The geographical structure of 15 natural populations of the flat oyster (Ostrea edulis L.) was assessed by single-strand conformation polymorphism (SSCP) of a 313-base-pair (bp) fragment of the mitochondrial 12S-rRNA gene. Fourteen haplotypes were observed, with one being dominant in the Mediterranean samples and another one in the Atlantic populations. The geographically extreme populations sampled in Norway and the Black Sea appeared differentiated by exhibiting the dominance of a third group of haplotypes. The results were compared to available microsatellite data at five loci. The Atlantic/Mediterranean differentiation pattern was qualitatively the same with both types of markers, confirming an isolation-by-distance pattern. The average mitochondrial...
Tipo: Text
Palavras-chave: Ostrea edulis; Polymorphism; Flat oyster; Population; Gene.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-680.pdf

The concept of population in clonal organisms: mosaics of temporally colonized patches are forming highly diverse meadows of Zostera marina in Brittany
Provedor de dados: 5
Autores: Becheler, Ronan; Diekmann, O.; Hily, Christian; Moalic, Yann; Arnaud-haond, S.
Seagrasses structure some of the world's key coastal ecosystems presently in decline due to human activities and global change. The ability to cope with environmental changes and the possibilities for shifts in distribution range depend largely on their evolvability and dispersal potential. As large-scale data usually show strong genetic structure for seagrasses, finer-grained work is needed to understand the local processes of dispersal, recruitment and colonization that could explain the apparent lack of exchange across large distances. We aimed to assess the fine-grained genetic structure of one of the most important and widely distributed seagrasses, Zostera marina, from seven meadows in Brittany, France. Both classic population genetics and network...
Tipo: Text
Palavras-chave: Clonality; Dispersal; Ecotype; Network analysis; Population; Zostera marina.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00006/11690/8499.pdf

Genetic variability of the Amazon River prawn Macrobrachium amazonicum (Decapoda, Caridea, Palaemonidae)
Provedor de dados: 16
Autores: Vergamini, F.G.; Pileggi, L.G.; Mantelatto, F.L.
The freshwater prawn Macrobrachium amazonicum is widely distributed in South America, and occupies habitats with a wide range of salinities. Several investigations have revealed the existence of wide intraspecific variability among different populations, although the understanding of this variability is still fragmentary and incomplete. We compared and characterized inland and coastal populations of M. amazonicum from Brazil, using molecular data (16S and COI mtDNA) to describe the degree of variability, structure, and relationships among them. Genetic divergence rates among populations showed variability at the intraspecific level. All the analyses evidenced significant genetic divergence among populations, structuring them in three groups: I- inland...
Tipo: Article / Letter to the editor
Palavras-chave: Brazil; Genetic distance; Inland versus coastal populations; Phylogeny; Mitochondrial DNA; Population; 42.74.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/369711

Feeding and reproductive ecology of Cichla piquiti Kullander &amp;amp; Ferreira, 2006 within its native range, Lajeado reservoir, rio Tocantins basin
Provedor de dados: 83
Autores: Marto,Vanilcia Clementino de Oliveira; Akama,Alberto; Pelicice,Fernando Mayer.
Cichla piquiti is endemic to the Tocantins-Araguaia river basin, but information about its biology is restricted to populations introduced in other basins. In order to fill this gap, we investigated the feeding ecology and reproductive dynamics of C. piquiti in Lajeado reservoir, rio Tocantins. A total of 270 fish were collected between November 2010 and October 2011. The diet is rich and composed of at least 23 resources, predominantly fish (at least 19 species). We observed no clear influence of sex, periods and ontogeny on diet, which was basically composed of Characidae and Cichlidae. Considering its reproductive dynamics, immature, reproductive and non-reproductive fish were recorded during the whole study, and reproductive effort did not differ among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Management; Population; Predator; Recruitment.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300625

A long-term study of small mammal populations in a Quercus dentata forest surrounded by agricultural lands in Tokachi，Hokkaido : I．Yearly changes in fauna and populations
Provedor de dados: 19
Autores: Onoyama, Keiichi; 小野山, 敬一.
Palavras-chave: Small mammals; Clethrionomys rufocanus bedfordiae; Yearly chenge; Population; Reproduction.
Ano: 1988
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1544

北海道十勝地方の2つの小学校における鳥類のガラス衝突死
Provedor de dados: 19
Autores: 柳川, 久; 澁谷, 辰生; Yanagawa, Hisashi; Shibuya, Tatsuo.
1.北海道十勝管内の２か所の小学校で，建物の周辺環境（植生や人工建造物），鳥類相と衝突死する鳥類の個体数の関係を調べるため，1994年６月から12月まで調査を行なった．調査を行なった新得町立屈足小学校と佐幌小学校はガラスを多用した同型の体育館を有していた．  2.ラインセンサスの結果，屈足小学校では25種498個体，佐幌小学校では25種516個体の鳥類が観察された．屈足小学校では，スズメが最も多く（178個体. 2000. 35.7％），次いでコムクドリ（58個体. 2000. 11.6％），アオジ（53個体. 2000. 10.6％），ハクセキレイ（50個体. 2000. 10.0％）が多かった．佐幌小学校ではスズメ（152個体. 2000. 29.5％）が最も多く，次いでシメ（78個体. 2000. 15.1％）が多かった．  3.佐幌小学校では10種26個体のガラス衝突した鳥類が拾得されたが，屈足小学校では１個体のみであった．衝突死が最も多い鳥類はシメで11個体（40.7％）であった．死亡した鳥類はほとんど（85.2％）が幼鳥であった．  4.佐幌小学校の周辺では，巣立ちしたシメの幼鳥の群れが採食するのがしばしば観察された．また，佐幌小学校にはスズメ類やムクドリ類のための巣箱も架設されており，ホオジロ類が好むやぶ地も備わっていた．  5.両校間の衝突死個体数の差は，特にシメなどの建物周辺で繁殖，採餌する鳥類の個体数の違いに起因すると思われた．
Palavras-chave: ガラス衝突; 死因; 鳥類群集; Bird; Hokkaido; Mortality; Population; Window-collisions.
Ano: 2000
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2300

Population and Sustainability: Understanding Population, Environment, and Development Linkages
Provedor de dados: 31
Autores: Clay,   Daniel C.; Reardon,   Thomas.
The triple challenge of rapid population growth, declining agricultural productivity, and natural resource degradation are not isolated from one another; they are intimately related. However, strategic planning and development programming tend to focus on individual sectors such as the environment, agriculture, and population; they do not explicitly take into account the compatibilities and inconsistencies among them. Farm households and their livelihood strategies are at the core of the intersectoral linkages approach advocated in this chapter. Three key aspects of the population-environment-development debate are discussed: first, the finding that inconsistencies between public and individual household behavior regarding childbearing and family planning...
Tipo: Working or Discussion Paper
Palavras-chave: Africa; Agriculture; Rwanda; Population; Sustainability; Environment; Food security; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Environmental Economics and Policy; Food Security and Poverty; International Development; Q56.
Ano: 1998
URL: http://purl.umn.edu/57055

Commercialization of Agriculture Under Population Pressure: Effects on Production, Consumption, and Nutrition in Rwanda
Provedor de dados: 31
Autores: von Braun,   Joachim; de Haen,   Hartwig; Blanken,   Juergen.
Rapid population growth in agroecologies that are already under high population pressure poses a major challenge for development policy. It becomes an even greater challenge in complex agroecologies where little new technology for rapid agricultural expansion is available. The mountain zones of the Zaire-Nile Divide in Central Africa present an example of such a challenging environment where agriculture has encroached onto marginal zones, that is, water catchment areas and the last tropical forests of the area. This study by von Braun, de Haen, and Blanken highlights the potentials of agricultural development for the employment, income, and consumption of the poor, but also stresses that nonagricultural rural growth and employment expansion are key to...
Tipo: Report
Palavras-chave: Agriculture and State; Rwanda; Produce trade; Government policy; Exports; Food supply; Nutrition policy; Population; Food Consumption/Nutrition/Food Safety; International Development.
Ano: 1991
URL: http://purl.umn.edu/42154

ECONOMIC ANALYSIS OF AGRICULTURAL LAND CONVERSION IN THE SOUTHEAST
Provedor de dados: 31
Autores: Nzaku,   Kilungu; Bukenya,   James O.
Revised version of paper added to AgEcon Search 10/06/05.
Tipo: Conference Paper or Presentation
Palavras-chave: Land use; Growth equilibrium modeling; Population; Employment; Land Economics/Use.
Ano: 2005
URL: http://purl.umn.edu/19456

EQUINE '98, PART I: BASELINE REFERENCE OF 1998 EQUINE HEALTH AND MANAGEMENT
Provedor de dados: 31
Autores: Garber,   Lindsey.
The NAHMS Equine '98 Study was designed to provide both participants and the industry with information on the nation's equine population for education and research.  The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically valid sample such that inferences can be made for all places with equids and for all equids in the participating states.  Included in the study were 28 states that accounted for 78.2 percent of the U.S. horses and ponies and 78.0 percent of farms with horses and ponies.  NASS  interviewers collected data from 2,904 participants via questionnaire from March 16 through April 10, 1998 for Part I. Inventory data from the 133 participating race tracks were included in this report....
Tipo: Report
Palavras-chave: NAHMS; Equine; Equids; Demographics; Population; Hoof care; Health; EIA; Births; Deaths; Illnesses; Neonatal; Livestock Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/32746

Rural America at a Glance, 2010 Edition
Provedor de dados: 31
Autores: Kusmin,   Lorin D.; Hertz,   Thomas.
Rural America At A Glance, 2010 Edition highlights the most recent indicators of social and economic conditions in rural areas for use in developing policies and programs to assist rural areas. The 2010 edition focuses on the U.S. rural economy, including employment trends, poverty, and demographics.
Tipo: Report
Palavras-chave: Rural indicators; Population; Employment; Rural unemployment; Nonmetropolitan; Nonmetro; Rural economy; Metro; Rural America; Census data; Population growth; Unemployment; Poverty; Demographics; ERS; USDA; Community/Rural/Urban Development.
Ano: 2010
URL: http://purl.umn.edu/96637

Global Growth, Macroeconomic Change, and U.S. Agricultural Trade
Provedor de dados: 31
Autores: Gehlhar,   Mark J.; Dohlman,   Erik; Brooks,   Nora L.; Jerardo,   Alberto; Vollrath,   Thomas L.
After a decade of uneven export growth and rapidly growing imports, U.S. agriculture has begun to reassert its position in global trade markets. Rising exports and signs of moderating demand for imports mark a departure from previous trends. This report places past trends and emerging developments in perspective by spotlighting the role of two specific factors that help steer U.S. agricultural trade patterns: global growth and shifts in foreign economic activity that affect U.S. exports, and macroeconomic factors underlying the growth of U.S. imports. Consistent with actual changes in the level and destination of U.S. exports, model simulations corroborate the contention that renewed export growth can be sustained by expanding incomes and growing food...
Tipo: Report
Palavras-chave: Agricultural trade; Trade balance; Income growth; Economic development; Population; Macroeconomics; Exchange rates; Current account; Growth projections.; Agricultural and Food Policy; Agricultural Finance; International Development; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/55963

Agricultural Production Survey Frames: Changes over time, issues, and challenges
Provedor de dados: 31
Autores: Watt,   Jean.
New Zealand has a long history of producing official statistics on agricultural, horticultural, and forestry production. Having a good population or survey frame is a key factor enabling the collection and production of quality statistics. Several population frames have been used over time for agricultural production censuses and surveys. These include land based frames, administrative registers, farmer and grower lists, and combinations of these. This paper discusses the frame currently used and earlier frames and associated challenges, including: the transition from a land based to administrative frame, coverage issues, frame updating, and issues when comparing statistics based on different frames. The paper discusses frames used for the production of...
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Statistics; Population; Survey; Frame; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/96951

Rural America At A Glance, 2005
Provedor de dados: 31
Autores: Hamrick,   Karen S.
Rural America At A Glance, 2005 is a six-page brochure that highlights the most recent indicators of social and economic conditions in rural areas for use in developing policies and programs to assist rural areas. The brochure is the fourth in a series of reports that uses current social and economic data to highlight population, labor market, income, and poverty trends in rural areas. This brochure provides information on key rural conditions and trends for use by public and private decisionmakers and others in efforts to enhance the economic opportunities and quality of life for rural people and their communities.
Tipo: Report
Palavras-chave: Rural housing; Rural indicators; Population; Recreation; Tourism; Rural employment; Rural unemployment; Rural poverty; Housing; Industry; Nonmetropolitan; Nonmetro; Rural economy; ERS; USDA; Agricultural and Food Policy.
Ano: 2005
URL: http://purl.umn.edu/59394

Rural America At A Glance, 2008 Edition
Provedor de dados: 31
Autores: Kusmin,   Lorin D.
Rural America At A Glance, 2008 Edition highlights the most recent indicators of social and economic conditions in rural areas for use in developing policies and programs to assist rural areas. The 2008 edition focuses on employment, poverty, population change, and demographic characteristics of nonmetro areas.
Tipo: Report
Palavras-chave: Rural indicators; Population; Employment; Rural unemployment; Nonmetropolitan; Nonmetro; Rural economy; Metro; Rural America; Census data; Population growth; Employment; Unemployment; Poverty; Demographics; ERS; USDA; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2008
URL: http://purl.umn.edu/59019

Impacts of Population and Income Growth Rates on Threatened Mammals and Birds
Provedor de dados: 31
Autores: Pandit,   Ram; Laband,   David N.
Per capita income and human population levels in a country have direct influences on its environmental outcomes. Countries with same level of income may have different rate of income growth and vice versa, suggesting that the influence of the rate of income growth on environmental outcomes could be different than that of income level. Similarly, the rate of population growth might have different impact in addition to the impacts of sheer number of population. We explore this empirical question using country-level data on threatened species published by IUCN for the year 2007. Controlling for other factors, our model estimates the influences of the rate of population and income growth on threatened mammals and birds across 113 continental countries. The...
Tipo: Conference Paper or Presentation
Palavras-chave: Income; Population; Spatial models; Spatial autocorrelation; Endemic species; Biodiversity; Environmental Economics and Policy; C21; Q57.
Ano: 2011
URL: http://purl.umn.edu/101404

Rural America At A Glance, 2009 Edition
Provedor de dados: 31
Autores: Kusmin,   Lorin D.
Update of an annual series, the 2009 edition of Rural America At A Glance deals with effects of the major recession on rural America. Initially, effects of the recession were mitigated in nonmetro areas by high commodity prices throughout much of 2008, but as the recession deepened, prices fell. Both nonmetro and metro areas experienced rising unemployment as manufacturing and other major employment sectors contracted, and they were similarly affected by the mortgage foreclosure crisis. However, even before the current recession, nonmetro poverty rates had risen in the growth years after the 2001 recession, against the usual trend during a time of economic expansion; the nonmetro poverty rate has exceeded the national poverty rate since 2001. The nonmetro...
Tipo: Report
Palavras-chave: Rural indicators; Population; Housing markets; Employment; Rural unemployment; Nonmetropolitan; Nonmetro; Rural economy; Metro; Rural America; Census data; Population growth; Unemployment; Poverty; Demographics; ERS; USDA; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/59017

THE STATE OF NORTH DAKOTA: ECONOMIC OUTLOOK
Provedor de dados: 31
Autores: Leistritz,   F. Larry.
This paper summarizes the general condition of the North Dakota economy and the outlook for the next few years, addressing recent and projected changes in employment, personal income, and population. Forces affecting the growth and decline of various economic sectors are discussed, and specific examples of new or expanding firms in various economic sectors are presented. Differences in economic performance among regions of the state and between urban and rural areas are examined, and major factors affecting the state's economy over the next two to five years are explored.
Tipo: Working or Discussion Paper
Palavras-chave: Economic outlook; North Dakota; Employment; Income; Population; Labor and Human Capital.
Ano: 1999
URL: http://purl.umn.edu/23078

Developing effective institutions for water resources management:  A case study in the Deduru Oya Basin, Sri Lanka
Provedor de dados: 31
Autores: Somaratne,   Pallewatte G.; Jinapala,   Kiribandage; Perera,   L.R.; Ariyaratne,   Badugodahewa Ranjith; Bandaragoda,   Don Jayatissa; Makin,   I.W.
Tipo: Working or Discussion Paper
Palavras-chave: River basins; Water resource management; Water lifting; Wells; Domestic water; Population; Economic aspects; Income; Irrigation programs; Institutions; Policy; Groundwater; Agricultural development; Fish farming; Pumps; Ecology; Water supply; Drought; Poverty; Land use; Water scarcity; Natural resources; Agricultural production; Cropping systems; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Political Economy; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/92665

PARKS, POPULATION, AND RESETTLEMENT IN THE DOMINICAN REPUBLIC
Provedor de dados: 31
Autores: Stycos,   J. Mayone; Duarte,   Isis.
A survey of 139 men and 123 women in four communities bordering Los Haitises National Park in the Dominican Republic took place in late 1992.  The survey followed a presidential decree ordering the army to clear the forest of people and cattle and to resettle a number of villages.  The survey found that people admitted using the forest for firewood and cash crop cultivation.  However, they were aware of the need to conserve the forest and expressed willingness to compromise on its use.  They were less aware of park boundaries and did not understand the concept of a national park.  Villagers welcomed rapid population growth, and women favor (and have) large families despite high rates of sterilization.  Nearly everyone opposed resettlement and favored...
Tipo: Working or Discussion Paper
Palavras-chave: Attitudes; Behavior; Gender; Knowledge; Park; Population; Resettlement; Survey; Resource /Energy Economics and Policy.
Ano: 1994
URL: http://purl.umn.edu/11883

THE STATE OF NORTH DAKOTA:  ECONOMIC, DEMOGRAPHIC, PUBLIC SERVICE, AND FISCAL CONDITIONS
Provedor de dados: 31
Autores: Coon,   Randal C.; Leistritz,   F. Larry.
This report is a compilation of North Dakota data.  It is a general reference about socioeconomic conditions and trends in selected economic, demographic, public service, and fiscal variables.  Data describing the state's economic base, population, income, employment, retail sales, human and financial resources, local government finance, health and safety, and housing are presented.     Data are presented and compared at the county level, the state planning region level, and by metropolitan status.  In addition, population, trade area population, taxable sales and purchases, and pull factors are presented at the municipal level.  Graphic displays follow the tabular presentations of the data at the county and state planning region level.  All of the data...
Tipo: Working or Discussion Paper
Palavras-chave: North Dakota; Socioeconomic trends; Economic base; Employment; Population; Migration; Public service availability; Community resources; Fiscal conditions; Financial Economics; Labor and Human Capital.
Ano: 2003
URL: http://purl.umn.edu/23075

EQUINE '98, PART II: BASELINE REFERENCE OF 1998 EQUINE HEALTH AND MANAGEMENT
Provedor de dados: 31
Autores: Garber,   Lindsey.
The NAHMS Equine '98 Study was designed to provide both participants and the industry with information on the nation's equine population for education and research.  The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically valid sample such that inferences can be made for all places with equids and for all equids in the participating states.  Included in the study were 28 states that accounted for 78.2 percent of the U.S. horses and ponies and 78.0 percent of farms with horses and ponies.  NASS  interviewers collected data from 2,904 participants via questionnaire from March 16 through April 10, 1998 for Part II.        Contact for this paper: Lindsey Garber
Tipo: Report
Palavras-chave: NAHMS; Equine; Equids; Population; Biosecurity; Animal movement; Nutrition; Pasture; Bedding; Manure; Livestock Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/32769

The Global Supply and Demand for Agricultural Land in 2050: A Perfect Storm in the Making?
Provedor de dados: 31
Autores: Hertel,   Thomas W.
2010 AAEA Presidential Address; forthcoming in January 2011 AJAE in shortened version.
Tipo: Conference Paper or Presentation
Palavras-chave: Global agriculture; Land use; Projections; Population; Yields; Urbanization; Biodiversity; Water; Climate change; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; International Development; International Relations/Trade; Land Economics/Use; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Q11; Q15; Q16; Q17.
Ano: 2010
URL: http://purl.umn.edu/92639

TRENDS IN THE NORTH DAKOTA ECONOMY
Provedor de dados: 31
Autores: Coon,   Randal C.; Leistritz,   F. Larry.
As North Dakota has shifted from its traditional dependence on natural resource-based activities to a more diversified economy, changes in employment, population, income, and retail sales have occurred.  This report summarizes changes in these and other economic indicators at the county and community level from 1980 to 2004.  Employment increased 12 percent from 1990 to 2004, with 19 of the state's 53 counties registering job growth.  The largest percentage (and absolute) gains were in Cass (Fargo) and Burleigh (Bismarck) counties.  Population statewide decreased by less than 1 percent from 1990 to 2004, as substantial growth in the Fargo and Bismarck-Mandan metropolitan areas was offset by population decreases in most of the state's rural counties.  Per...
Tipo: Working or Discussion Paper
Palavras-chave: Employment; Population; Per capita income; Retail sales; Pull factors; Community/Rural/Urban Development.
Ano: 2006
URL: http://purl.umn.edu/23094

Apprentissage par l’Expérience: L’Utilisation des Résultats des Démonstrations du MINAGRI et du PDMAR pour Améliorer les Programmes de Stimulation de la Demande d’Engrais au Rwanda
Provedor de dados: 31
Autores: Kelly,   Valerie A.; Nyirimana,   Joseph.
Food Security Research Project (FSRP) et Division des Statistiques Agricoles (DSA) Ministère de l’Agriculture, de l’Elevage, et des For  MINAGRI
Tipo: Report
Palavras-chave: Food security; Food policy; Rwanda; Population; Extension; Crop Production/Industries; Q18.
Ano: 2002
URL: http://purl.umn.edu/55382

The role of poultry industry in indian economy
Provedor de dados: 89
Autores: Vetrivel,SC; Chandrakumarmangalam,S.
Poultry farming in India, in spite of several constraints, has progressed considerably during the last decade. The present study has been undertaken to examine various aspects related to the growth and development of poultry production in the country. Poultry production in India was confined to backyards till recently. Local breed of birds were reared for the supply of eggs and meat. The increasing demand for poultry products necessitates augmenting the supply by importing improved breeds of poultry. In 1961, the proportion of hybrid populations in the total population of poultry was about 2 percent. Within a couple of decades, these birds have dominated the market sidelining the indigenous birds. The technological advances have revolutionized the role and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eggs; Supply; Production; Technology; Growth; Population.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400001

Geographical variation in the reproduction and sexual dimorphism of the Boddaert's tropical racer, Mastigodryas boddaerti (Serpentes: Colubridae)
Provedor de dados: 103
Autores: Siqueira,Débora M.; Nascimento,Loana P.; Montingelli,Giovanna G.; Santos-Costa,Maria Cristina dos.
We obtained data on time of sexual maturity, dimorphism, fecundity and on the reproductive cycle of Mastigodryas boddaerti (Sentzen, 1796) through the examination of 321 preserved specimens, of which 221 were collected in the Brazilian Amazon region and 100 in the Cerrado savannas of Central Brazil. The degree of sexual size dimorphism (snout-vent length, SVL) was significantly greater in the specimens from the Cerrado in comparison with those from the Amazon. Females had a significantly larger number of ventral scales, on average, whereas males had more sub-caudal scales. However, there was no intersexual difference in tail length or head width, although the heads of the males were significantly longer, which may reflect dietary differences. Breeding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Ecology; Cerrado; Morphology; Population.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000500002

Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
Provedor de dados: 97
Autores: Novoa,F. Fernando; Rivera-hutinel,Antonio; rosenmann,Mario; Sabat,Pablo.
Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied the maximum and basal metabolic rates of two populations of the rodent Chroeomys olivaceus dwelling in habitats with contrasting temperature and rainfall regimes, and to test if differences in metabolic capacities are due to local adaptation or acclimatization effect. After four weeks of acclimation to 25 ºC and 10 ºC, the BMR and MMR were determined in individuals from the northern population of Caleta Loa, and the southern population of La Picada. Individuals from ‘La Picada’ population were heavier than those from Caleta Loa. MMR and BMR...
Tipo: Journal article
Palavras-chave: Basal metabolic rate; Chroeomys olivaceus; Maximum metabolic rate; Population; Phenotypic plasticity.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200004

Population density and reproduction of two Peruvian leaf-eared mice (Phyllotis spp.)
Provedor de dados: 97
Autores: ARANA,MARGARITA; RAMÍREZ,OSWALDO; SANTA MARÍA,SERGIO; KUNIMOTO,CESAR; VELARDE,RODRIGO; DE LA CRUZ,CECILIA; RUÍZ,MARíA LUISA.
Population density and reproduction were studied in two leaf-eared mice (Phyllotis spp.) in the Peruvian locality known as Lomas de Lachay. Density varied between 0-3 individuals ha-1 in P. andium, and between 0-12 individuals ha-1 in P. amicus. An annual cycle of population abundance was observed in both species. Phyllotis amicus showed no seasonal reproductive activity, but P. andium had seasonal reproduction with pregnant females principally observed between July and September. Differences in juvenile weight were related to litter size. It is likely that two young was the optimal litter size in the harsh and seasonal xeric environment of Lomas de Lachay. Our results suggest that P. amicus maintains low, highly dispersed populations in a harsh...
Tipo: Journal article
Palavras-chave: Ecology; Phyllotis; Rodents; Population; Desert.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000400010

Phenotypic, additive genetic and environment correlations of maize landraces populations in family farm systems
Provedor de dados: 63
Autores: Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado.
Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010

Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
Provedor de dados: 63
Autores: Faria,Italo Kaye Pinho de; Vieira,José Luís Vilela; Tenelli,Sarah; Almeida,Rodrigo Estevam Munhoz de; Campos,Leonardo José Motta; Costa,Rodrigo Veras da; Zavaschi,Eduardo; Almeida,Risely Ferraz de; Carneiro,Leandro de Mello e Silva; Otto,Rafael.
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hybrid; Population; Corn yield; Second-crop.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344

Spatial distribution of plant-parasitic nematodes in sugarcane fields
Provedor de dados: 63
Autores: Dinardo-Miranda,Leila Luci; Fracasso,Juliano Vilela.
Nematodes are important parasites of sugarcane in Brazil. Because of this, several studies have been conducted in recent years to evaluate the effectiveness of control methods. However, no studies have been reported on the spatial distribution of nematodes in sugarcane fields, and such studies are indispensable for the development of sampling plans, aimed at their application in integrated management programs. The spatial distribution of Meloidogyne javanica, Pratylenchus zeae, and mixed populations of P. zeae and P. brachyurus was studied in six commercial fields, with areas ranging from 0.26 to 0.50 ha; samples were obtained during the rainy season. The samples, represented by about 50 g roots, were collected within a rectangular grid measuring 7 × 12 m,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum; Meloidogyne; Pratylenchus; Spatial variability; Population.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200007

ความก้าวหน้าในการปรับปรุงพันธุ์ข้าวโพดหวานและข้าวโพดฝักอ่อนของ มหาวิทยาลัยเกษตรศาสตร์ในรอบ 3 ปี (พ.ศ. 2550-2552)
Provedor de dados: 106
Autores: Chokechai Aekatasanawan; Chamaiporn Aekatasanawan; Noppong Chulchoho; Kwanhatai Tanongjid; Warunya Dantaweesin; Patipat Promnaret.
Objectives of the Sweet Corn and Baby Corn Improvement Project of Kasetsart University was to improve populations and develop inbreds and single-cross hybrids of sweet corn and the non-detasseld baby corn for high yield and good eating quality for the fresh market and processing. Three sweet corn populations KSC 3 (AC0) and TSC 1 DMR (BC0) and KSC 2 (CC0) were improved by using S2 testcrossed with inbred testers KSei 14004 and SSWI 114, respectively, except for CC3 using S3 testcross). During 3 years (2007-2009), KSC 3(HI)C3 (AC3), TSC 1 DMR (HI)C2 (BC2) and KSC 2(HI)C3 (CC3) were successfully improved including their inbred and hybrid development. Population crosses were formed by factorial cross followed North Carolina Design II. Progress from selection...
Palavras-chave: Sweet corn; Baby corn; Improvement; Population; Inbred; Hybrid; ข้าวโพดหวาน; ข้าวโพดฝักอ่อน; การปรับปรุงพันธุ์ ประชากร; สายพันธุ์แท้; ลูกผสม; ผลผลิตฝักสด; คุณภาพการรับประทาน; ลักษณะทางการเกษตร; สมรรถนะการผสมทั่วไป; มหาวิทยาลัยเกษตรศาสตร์.
Ano: 2010
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4659

Sorghum breeding
Provedor de dados: 106
Autores: Krisda Samphantharak; Wasana Wongyai; Sutee Rayakaew; Chaba Amramphai; Thamrongsilpa Pothisoong; Prapon Boonrumpun.
1 ill., 6 tables
Palavras-chave: Sorghum; Breeding; Yields; Adaptability; Early maturity; Genetic diversity; Backcross; Population; ข้าวฟ่าง; การปรับปรุงพันธุ์; ผลผลิต; การปรับตัว; พันธุ์เบา; การผสมกลับ; การปรับปรุงประชากร.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4566

Ecologia populacional dos Amphipoda (Crustacea) dos fitais de Caiobá, Matinhos, Paraná, Brasil
Provedor de dados: 104
Autores: Dubiaski-Silva,Janete; Masunari,Setuko.
Spalial and temporal density distributions of Amphipoda from the phytals of Caiobá are described. Air temperature oscillated from 16ºC (August and May) to 23ºC (March), surface water temperature from 17ºC (August) to 25ºC (March) and the salinity from 29.3‰ (May) to 32.8‰ (August). Two samples of 25cm² (for algae less than 5cm long), 100 cm² (for algae between 5-10cm long) and whole plants (for algae more than 10cm long) were removed with a spatula from the rocky surface at Caiobá Beach, in August/86, November/86, March/87 and May/87. After sorting, the algal substrata were weighted, their adsorption coefficient calculated and the sediment retained among the thallii weighted. The average distance between the branching was measured for all branched algae....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphipoda; Phytal; Density; Population; Caiobá; Paraná; Brazil.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200015

Inbreeding and building up small populations of stingless bees (Hymenoptera, Apidae)
Provedor de dados: 104
Autores: Nogueira-Neto,Paulo.
A study of the viability of small populations of Hymenoptera is a matter of importance to gain a better zoological, ethological, genetical and ecological knowledge of these insects, and for conservation purposes, mainly because of the consequences to the survival of colonies of many species of bees, wasps, and ants. Based on the Whiting (1943) principle, Kerr &amp;amp; Vencovski (1982) presented a hypothesis that states that viable populations of stingless bees (Meliponini) should have at least 40 colonies to survive. This number was later extended to 44 colonies by Kerr (1985). This would be necessary to avoid any substantial amount of homozygosis in the pair of chromosomic sexual loci, by keeping at least six different sexual gene alleles in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee; Genetics; Imbreeding; Population; Meliponiculture; Stresses; Diploid males; Sex determining bee substance.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400025

População e território de forrageamento de uma colônia de Heterotermes tenuis (Hagen) (Isoptera, Rhinotermitidae)
Provedor de dados: 104
Autores: Camargo-Dietrich,Célia Regina Rodrigues de; Costa-Leonardo,Ana Maria.
Heterotermes tenuis (Hagen, 1858) is a subterranean termite that cause damage in forests, crops and urban areas. The population and foraging territory of an urban colony were determined using triple mark-release-recapture technique. Foraging population was estimated in 134,583 ± 5,803 individuals. The foraging territory encompassed an area of 175,5 m² and the maxim linear foraging distance was 36 m.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoptera; Rhinotermitidae; Heterotermes tenuis; Population; Territory.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300006

Estrutura populacional de Hyale media (Dana) (Amphipoda, Gammaridea, Hyalidae), habitante dos fitais de Caiobá, Matinhos, Paraná, Brasil
Provedor de dados: 104
Autores: Dubiaski-Silva,Janete; Masunari,Setuko.
A study of correlation between the total body length and the somites length was carried out in a population of Hyale media (Dana, 1857), in order to know which somite or group of somites has the highest correlation index with the total body length. As the sum of the length of the first to fourth pereonites showed the highest linear correlation index (Y=0.0764+0.2736X; r=0.9723), this meristic parameter was chosen to describe the population structure of the species. The following aspects were treated: distribution of the body size classes in the various phytals, population composition, seasonal fluctuation of population density. relative frequency of the ovigerous females and correlation between the body length and the number of eggs inside the marsupium of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hyale media; Population; Phytal; Correlation; Density; Matinhos; Brazil.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100003

Effects of forest structure components on the occurence, group size and density of groups of bare-face tamarin (Saguinus bicolor - primates: Callitrichinae) in Central Amazonia
Provedor de dados: 36
Autores: Vidal,Marcelo Derzi; Cintra,Renato.
This study analyzed the influence of forest structural components on the occurence, size and density of groups of Bare-face Tamarin (Saguinus bicolor) - the most threatened species in the Amazon - and produced the first map of distribution of groups in large-scale spatial within the area of continuous forest. Population censuses were conducted between November 2002 and July 2003, covering 6400 hectares in the Ducke Reserve, Manaus-AM, Brazil. Groups of S. bicolor were recorded 41 times accordingly distributed in the environments: plateau (20); slopes (12); and lowlands (09). The mean group size was 4.8 indiv./group, and ranged from 2 to 11 individuals. In the sites where the groups were recorded, and in an equivalent number of sites where no tamarins were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saguinus bicolor; Population; Ecology; Ducke Reserve; Threatened species.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000200014

Density, abundance and extractive potential of the mangrove crab, Ucides cordatus (Linnaeus, 1763) (Brachyura, Ocypodidae): subsidies for fishery management
Provedor de dados: 42
Autores: PINHEIRO,MARCELO A.A.; SOUZA,MARCELO R.; SANTOS,LUCIANA C.M.; FONTES,ROBERTO F.C.
ABSTRACT Ucides cordatus is a relevant fishery resource of Brazilian mangroves and requires legal normative to sustainable use based on stock assessment and management. This study evaluated some population parameters (structure, density, abundance, fishery potential and stock) of this crab species in Brazil Southeast (São Paulo, State), discussing the use of the results to delineate fishery management strategies. Density was monthly evaluated (September 1998 to August 1999), using five sample quadrats of 2x2 m. Density (ind.m-2) was indirectly estimated by counting the opened (with biogenic activity) and closed galleries, and contrasted with flooding level by tides using the vertical distribution of macroalgae in the base of trees. Density of U. cordatus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crab; Crustacean; Fishery; Management; Mangrove; Population.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401381

Bio-ecological aspects of the hermit crab Paguristes calliopsis (Crustacea, Diogenidae) from Anchieta Island, Brazil
Provedor de dados: 42
Autores: Biagi,Renata; Meireles,Andrea L.; Mantelatto,Fernando L.
In southern Atlantic studies on hermit crab biology are scanty considering the local biodiversity. In this way, some population features of Paguristes calliopsis Forest and Saint Laurent, 1968 such as size frequency distribution, sex ratio and shell occupation in the natural environment were studied. Specimens were collected by means of scuba methods in the infralittoral area of the Anchieta Island. A total of 116 individuals were analyzed. Size measurements (minimum; maximum; mean shield length ± sd, respectively) were 0.8; 4.5; 2.76 ± 0.79 mm for males and 2.28 ± 0.36 mm for females. The sex ratio was 1.47:1 in favor of males which prevailed in the largest size classes. The hermit crabs occupied shells from eleven gastropod species and Cerithium atratum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diogenidae; Paguristes; Population; Shell occupation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000300006

Y Chromosomal STR Polymorphism in Northern Chinese Populations
Provedor de dados: 48
Autores: ZHENG,LIHONG; SUN,HAIMING; WANG,JINGWEI; LI,SHILIN; BAI,JING; JIN,YAN; YU,YANG; CHEN,FENG; JIN,LI; FU,SONGBIN.
Y chromosomal STRs show sufficient variability among individduals in a population and a high degree of geographical differentiation, such that their polymorphic character makes them especially suited for population genetic studies. To investígate the polymorphism of a set of 17 Y-STR loci in northern China, we genotyped the 17 Y chromosomal STR loci in a population sample of 377 unrelated males from eight ethnic populations in northern China. We calculated the haplotype frequencies, Rst value and carried out the analysis of molecular variance (AMOVA). We then drew the multidimensional scaling analysis (MDS) plot and phylogenetic tree based on the Rst value. All populations showed a high level of haplotype diversity, with low inter-population variance as...
Tipo: Journal article
Palavras-chave: China; Population; STR; Y chromosome.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400011

Effect of buctril super (Bromoxynil) herbicide on soil microbial biomass and bacterial population
Provedor de dados: 52
Autores: Abbas,Zafar; Akmal,Muhammad; Khan,Khalid Saifullah; Fayyaz-ul-Hassan,.
The present study aimed to evaluate the effect of bromoxynil herbicide on soil microorganisms, with the hypothesis that this herbicide caused suppression in microbial activity and biomass by exerting toxic effect on them. Nine sites of Punjab province (Pakistan) those had been exposed to bromoxynil herbicide for about last ten years designated as soil 'A' were surveyed in 2011 and samples were collected and analyzed for Microbial Biomass Carbon (MBC), Biomass Nitrogen (MBN), Biomass Phosphorus (MBP) and bacterial population. Simultaneously, soil samples from the same areas those were not exposed to herbicide designated as soil 'B' were taken. At all the sites MBC, MBN and MBP ranged from 131 to 457, 1.22 to 13.1 and 0.59 to 3.70 µg g-1 in the contaminated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Buctril super; Bacteria; Effect; Population.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100002

Reading model to estimate optimum economic intakes of amino acids for poultry
Provedor de dados: 65
Autores: Silva,Edney Pereira da; Sakomura,Nilva Kazue; Hauschild,Luciano; Gous,Robert Mervyn.
The use of a linear-plateau procedure to describe the response of an individual in the population has theoretical support, since the maximum potential performance of each individual is genetically determined, and any increment in intake of the limiting nutrient above maintenance will result in a linear response in output until this genetic potential, and hence requirement, is reached. However, because of the distribution of body weights and maximum potential outputs in the population, the mean response of the population is curvilinear, which negates the possibility of defining a 'requirement' for the limiting nutrient, and instead leads to the possibility of defining an optimum economic intake of the nutrient.. The Reading model describes the response of a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg mass; Mathematical model; Optimal economic; Population.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300450