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Modelos matematicos de simulacao e a dinamica populacional de rebanho bovino. Infoteca-e
AFFIN, O. A. D.; SANTOS, N. A. dos; BARCELLOS, J. M..
bitstream/item/101496/1/doc-57.pdf
Tipo: Documentos (INFOTECA-E) Palavras-chave: Agropecuaria; Simulation.; Bovino; Dinâmica Populacional; Modelo Matemático; Pesquisa; Simulação.; Agriculture; Cattle; Mathematical models; Population dynamics; Research..
Ano: 1994 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549101
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Modélisation biophysique pour la prévision du recrutement ArchiMer
Allain, Gwenhael.
Exploited fish populations are dependent on recruitment (i.e. size of the new year class) to sustain their abundance. Recruitment variations are related to hydroclimatic variations and may accentuate the detrimental effects of fishing. Recruitment prediction requires accurate fisheries oceanographic tools, which are expected to be more reliable than large-scale correlation analyses between fish abundance and climate variables. Recruitment is the result of the integration over a season and large oceanic areas of processes affecting larval survival, which are dependent on small-scale mechanisms. Hydrodynamic models are a tool to perform this integration. This thesis aims at exploring and modelling physical-biological interaction mechanisms in order to...
Tipo: Text Palavras-chave: Anchovy; Upwelling; Turbulence; Retention; Fisheries management; Population dynamics; Stock environment interaction; Stock recruitment relation; Scale integration; Individual based models; Survival; Growth; Otolith; Physical biological interactions; Prediction; Recruitment; Turbulence; Rétention; Méso échelle; Intégration des échelles; Modèle de survie; Modèle de ponte; Modèles individu centrés; Modèles de corrélation; Modèles stochastiques; Juvéniles; Larves; Otolithe; Modèle de croissance; Interactions physique biologie; Prévision; Recrutement.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-5.pdf
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Application of deterministic model of isothermals for population dynamics of Synthesiomyia nudiseta (Diptera, Muscidae) BJB
ALMEIDA,J. R. de; OLIVEIRA,S. G. de; BORGES,I. L.; D'ALMEIDA,J. M..
The isothermal deterministic model adherence was studied to evaluate the population dinamic of Synthesiomyia nudiseta (Diptera, Muscidae). The linear form of equation obtained for the experiments in the several phases, were for Egg: 1/D = -0.18 + 0.02 . T; Larva: 1/D = -0.028 + 0.01. T; Pupa: 1/D = -0.069 + 0.01 . T; and Adult: 1/D = -0.4178 + 0.02 . T. In function of temperature, S. nudiseta can present from 4.18 to 8.95 and from 4.91 to 8.99 generations per year, when calculated through the equations of development and through the simulations, respectively. And the higher the temperature the larger the generation number. Through variance analysis it was verified the significance for the regression equations in relation to the annual generation number...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deterministic model; Population dynamics; Synthesiomyia nudiseta; Diptera.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100018
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Dinámica poblacional de la langosta Panulirus argus (Latreille, 1804) OceanDocs
Alzugaray Martínez, Romina; Puga Millán, Rafael.
La región suroriental de Cuba es la segunda zona en aportes a los desembarques nacionales de langosta, Panulirus argus. Esta zona, al igual que el resto del país, presentó las mayores capturas a mediados de los años 80, decreciendo posteriormente hasta promediar en los últimos años menos de 1 000 t. Con el objetivo de caracterizar la dinámica de la población de langosta y del esfuerzo pesquero aplicado en esta región, se analizó información sobre captura, esfuerzo pesquero y composición por tallas de las capturas de langosta. Mediante técnicas de Análisis Secuencial de Poblaciones, se demuestra que en los últimos años ha ocurrido una disminución del número de individuos de la población de langosta, de la biomasa y del reclutamiento, en relación con la...
Tipo: Journal Contribution Palavras-chave: Lobster fisheries; Population dynamics; Fishery biology.
Ano: 2010 URL: http://hdl.handle.net/1834/4185
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Population ecology of small rodents and marsupials in a semi-deciduous tropical forest of the southeast Pantanal, Brazil Rev. Bras. Zool.
Andreazzi,Cecilia S. de; Rademaker,Vitor; Gentile,Rosana; Herrera,Heitor M.; Jansen,Ana M.; D'Andrea,Paulo S..
The Pantanal is a South American biome characterized by extensive plains and stark environmental seasonality. Several habitats are subject to annual flooding, forcing small mammal species to aggregate in dry forest patches, which most likely influences their population dynamics and life history strategies. In order to investigate the seasonal influence on the life history traits of these small mammals, we conducted a 2-year mark-recapture study in the southeastern region of the Brazilian Pantanal (Nhecolândia) and analyzed the population dynamics of the most abundant small mammal species with the jackknife estimator. A trapping effort of 21,560 trap-nights resulted in 615 individuals in 1,171 captures (success = 5.43%). Three species of rodents - Oecomys...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gracilinanus agilis; Oecomys mamorae; Population dynamics; Seasonality; Small mammal; Thrichomys pachyurus.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600009
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Ecologia populacional de especies arboreas na estacao ecologica do Panga (Uberlandia-MG). Infoteca-e
AQUINO, F. de G.; OLIVEIRA, M. C. de; RIBEIRO, J. F.; SCHIAVINI, I..
bitstream/CPAC-2009/24594/1/bolpd_26.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: ECFLOR100; Acacia glomerosa; Uberlandia; Minas Gerais; Brasil; Species; Plant population; Growth.; Anadenanthera Macrocarpa; Biodiversidade; Árvore; Crescimento; Cerrado; Ecologia Vegetal; Dinâmica Populacional; Espécie; Mortalidade; População de Planta.; Brazil; Biodiversity; Plant ecology; Population dynamics; Mortality; Trees..
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548581
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Dinâmica de populações de espécies lenhosas de Cerrado, Balsas, Maranhão. Repositório Alice
AQUINO, F. de G.; WALTER, B. M. T.; RIBEIRO, J. F..
Tipo: Artigo de periódico Palavras-chave: Balsas; Recrutamento; Flora arbustivo-arbórea; Maranhão; Brasil; Savanna; Species; Plant shrubs and trees; Woody plant; Recruitment; Regeneration.; Cerrado; Dinâmica Populacional; Espécie; Mortalidade; Planta Lenhosa; Regeneração; Vegetação.; Brazil; Population dynamics; Mortality; Vegetation..
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/571631
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Flutuação populacional de Rhynchophorus palmarum e a associação com o Bursaphelenchus cocophilus em dendezeiro no Estado do Amazonas. Repositório Alice
ARAUJO, J. C. A. de; ARAUJO, A. E. de; SANTOS, A. F. dos.
Estudo da flutuacao populacional de Rhyncophorus palmarum e de sua associacao com o nematoide Bursaphelenchus cocophilus em uma plantacao de dende no municipio de Rio Preto da Eva (Manaus, AM, Brasil). A populacao do inseto foi considerada alta na area circunvizinha a plantacao e as vezes apresentou picos coincidindo com os meses chuvosos. Entretanto, nao houve correlacao signficativa entre captura e pluviosidade. As medias mensais de besouros capturados por isca, nos anos de 1988, 1989, 1990 e 1991, foram, respectivamente, 11,8, 17, 8, 17,0 e9,7. Os indices mensais de contaminacao dos insetos com o nematoide foram bastante variaveis e apresentaram distribuicao irregular ao longo do periodo. Os maiores percentuais de insetos contaminados foram observados...
Tipo: Artigo de periódico Palavras-chave: Inseto vetor; Bursaphelenchus cocophilus; Brasil; Amazonas; Rio Preto da Eva; Diseases; Anel Vermelho; Dendê; Dinâmica Populacional; Elaeis Guineensis; Doença; Nematóide; População; Nematoda; Rhynchophorus palmarum; Population dynamics.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/668060
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Population biology of the crab Armases angustipes (Crustacea, Decapoda, Sesarmidae) at Brazilian tropical coast Iheringia, Sér. Zool.
Araújo,Marina de Sá Leitão C. de; Tenório,Deusinete de O.; Castiglioni,Daniela da S..
The semi terrestrial crabs are important elements of the fauna of coastal regions. The aim of this study was to analyze the population structure of Armases angustipes (Dana, 1852) at estuaries of the Ariquindá River, considered a non impacted area, and Mamucabas River, considered a few impacted area, on the south coast of state of Pernambuco, Brazil. The species occurred in all months of the year. The number of individuals per month varied, being higher in the months of transition between the seasons. This is probably due to significant seasonal variations of air and burrow temperature and burrow salinity. There was no sexual dimorphism in size of A. angustipes in the mangrove of Ariquindá River, but males were larger than females in the mangrove of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Population dynamics; Reproductive period; Sesarmid.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200004
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Transferability of heterologous microsatellite loci between species of Euterpe genus. Repositório Alice
AZÊVEDO, H. F.; BENVINDO, F. D.; CAVALCANTE, L. N.; HAVERROTH, M.; WADT, L. H. de O.; CAMPOS, T. de.
Euterpe precatoria, popularly known as "açaí-do-amazonas", has agronomic, technological and economic potential and has been gaining prominence with the commercialization of its fruits. The production of this açaí-do-amazonas is based on extractivism and management practices have been recommended for sustainable collection. To recommend sustainable rates of fruit collection, it is essential to have information on the genetic variability of natural populations to monitor the recruitment and population dynamics. The objective of this study was to evaluate the transferability of microsatellite loci of E. edulis species to E. precatoria to confirm the applicability of these markers in genetic studies. Eighteen microsatellite loci developed for E. edulis were...
Tipo: Artigo de periódico Palavras-chave: Transferability; Western Amazon; Marcador microssatélite; Transferibilidade; Transferibilidad; Formoso; Novo Segredo; Feijó (AC); Acre; Dinámica poblacional; Amazonia Ocidental; Repeticiones de microsatélite; Variación genética.; Ensayos de variedades; Fitomejoramiento; Melhoramento genético vegetal; Variedade; Dinâmica populacional; Marcador molecular.; Açaí; Variação Genética; Population dynamics; Euterpe precatoria; Genetic variation; Loci.; Variety trials; Plant breeding; Microsatellite repeats.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079268
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Biologie et dynamique des populations d’Anchois (Engraulis encrasicolus) des côtes mauritaniennes. OceanDocs
Ba, I.S..
Résumé: Cette étude traite de la biologie et de la dynamique des populations d’anchois (Engraulis encrasicolus) des côtes mauritaniennes. Après un bref rappel des conditions climatiques et hydrobiologiques de la région, une tentative de mise en évidence de race ou population locale a montré que cette espèce pourrait être rattachée à la population méridionale atlantique du Golfe de Gascogne. En Mauritanie, l’Anchois n’est pêché que de façon accessoire. Les captures les plus abondantes sont réalisées de mai à Septembre essentiellement dans la zone nord où l’on observe un upwelling permanent. Pour évaluer la taille du stock, des estimations de biomasse par échointégration ont été effectuées, mais celles-ci n’ont pas permis de donner un ordre de grandeur...
Tipo: Theses and Dissertations Palavras-chave: Anchovy fisheries; Upwelling; Population dynamics; Mortality.
Ano: 1988 URL: http://hdl.handle.net/1834/676
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Vanishing populations of Oryza minuta Presl. in Pangil, Laguna, Philippines International Rice Research Institute
Banaticla, M. C. N.; Almazan, M. S. R..
p.94-95
Palavras-chave: Endangered species; Extinction; Population dynamics; Plant ecology; Wild relatives; Philippines.
Ano: 2004 URL: http://hdl.handle.net/123456789/1083
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Coastal phytoplankton community dynamics and coexistence driven by intragroup density-dependence, light and hydrodynamics ArchiMer
Barraquand, F.; Picoche, C.; Maurer, Daniele; Carassou, L.; Auby, Isabelle.
Phytoplanktonic communities maintain a high diversity in a seemingly homogeneous environment, competing for the same set of resources. Many theories have been proposed to explain this coexistence despite likely competition, such as contrasted responses to temporal environmental variation. However, theory has developed at a faster pace than empirical evaluation using field data, which requires inferring drivers of community dynamics from observational time series. Here, we combine autoregressive models with a data set spanning more than 20 years of phytoplankton counts every two weeks, together with nutrients and physical variables. By comparing models dominated by nutrients or physical variables (hydrodynamics and climate), we first explore which abiotic...
Tipo: Text Palavras-chave: Competition; Diatoms; Dinoflagellates; Hydrodynamics; Interactions; MAR; Mutualism; Network; Population dynamics; Seasonality; Time series.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00461/57257/59285.pdf
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Monitoreo de Eoreuma loftini (Lepidoptera: Crambidae) en caña de azúcar con su feromona sexual en Morelos, México. Colegio de Postgraduados
Barroso Aké, Hanzel Jesús.
Eoreuma loftini (Lepidoptera: Crambidae) es un problema fitosanitario en la zona productora de caña de azúcar de Tlaquiltenango, Morelos, México. Para ampliar el conocimiento de esta especie, en este trabajo se plantearon los objetivos siguientes: conocer la fluctuación población de E. loftini; evaluar la eficacia de captura de machos con la feromona comercial; determinar la relación entre capturas, temperatura y precipitación pluvial y estimar la duración del atrayente en campo. Se establecieron dos experimentos con trampas tipo “ala”; el primero del mes de febrero de 2013 con revisiones quincenales hasta enero de 2014. En el cual, el liberador de la feromona se renovó mensualmente. El experimento dos, se llevó a cabo de abril a diciembre de 2013, con...
Palavras-chave: Fluctuación poblacional; Regresión lineal; Trampa tipo "ala"; Citocromo oxidasa I.; Population dynamics; Linear regression; Trap type "wing"; Cytochrome oxidase I.; Entomología y Acarología; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2364
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Waterboatmen, and testing for Lotka-Volterra-type interactions OMA
Bergmans, M..
A previous paper by Istock, in which this author claims to have successfully applied the Lotka-Volterra model to his observations on corixid population dynamics, is criticised for the shortcomings in evidence cited to support the model's fit with the data. It is contended that the dynamic behaviour of the system of Hesperocorixa lobata - Sigara macropala interaction is not in accordance with the Lotka-Volterra model. ThIs brief critique is followed by comments by istock in reply to the points raised in Bergmans' letter.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Models; Population dynamics; Corixidae.
Ano: 1979 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3600
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Situação da cultura da pupunha no Estado do Acre. Infoteca-e
BERGO, C. L..
Este trabalho tem por objetivo relatar a situação da pupunha-palmiteira cultivada no Estado do Acre, podendo servir também para orientar futuras discussões e pesquisas sobre a cultura da pupunha na Região Norte.
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Peach palm; Palmetto; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Dinámica poblacional.; Cadena de suministro; Pupunha; Bactris gasipaes; Plantio; Dinâmica populacional; Palmito; Produção; Cadeia produtiva; Population dynamics; Supply chain..
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/661752
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A new analytical formulation of retention effects on particle diffusion processes Anais da ABC (AABC)
Bevilacqua,Luiz; Galeão,Augusto C.N.R.; Costa,Flavio P..
The ultimate purpose of this paper is to present a new analytical formulation to simulate diffusion with retention in a reactive medium under stable thermodynamic conditions. The analysis of diffusion with retention in a continuum medium is developed after the solution of an equivalent problem using a discrete approach. The new law may be interpreted as the reduction of all diffusion processes with retention to a unifying phenomenon that can adequately simulate the retention effect namely a circulatory motion. It is remarkable that the governing equation requires a fourth order differential term as suggested by the discrete approach. The relative fraction of diffusion particles β is introduced as a control parameter in the diffusion-retention law as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diffusion; Retention; Constitutive law; Discrete approach; Population dynamics; Fourth order differential equations.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400031
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Conocimiento biológico pesquero del recurso merluza (Merluccius hubbsi) y su pesquería en la República Argentina. OceanDocs
Bezzi, S.I.; Dato, C.V..
This paper summarizes the present knowledge on Merluccius hubbsi and its fishery in Argentina, based on the model proposed by the Technical Secretary of Comisión Técnica Mixta del Frente Marítimo, in 1990. It includes the taxonomic location of the species, its geographical distribution, stock unity, structure and population dynamics. It describes the fishing gear and fishing operations and presents the available information on selectivity and discards. The paper shows the data landings separated by fleet. Exploitation regulatory measures in force are included.
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Population dynamics; Stock assessment; Mortality; Population structure; Fishery management; Landing statistics; Parasites; Stock assessment; Population structure; Fishery management; Mortality; Parasites; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_5574; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 1995 URL: http://hdl.handle.net/1834/2558
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Impact de l'érosion côtière et éléments d'étude de vulnérabilité : example du Togo (Golfe de Guinée) OceanDocs
Blivi, A.B..
La morphodynamique côtière permet d'analyser les séquences de plages réflexives et dissipatrices des côtes sablonneuses. Les ouvrages maritimes perturbent le mécanisme hydro-sédimentaire et déclenchent l'érosion côtière dont les impacts de recul sont généralement assez forts, notamment de 12 m/an sur le segment de 5 km de côte, à l'est du système d'infrastructures portuaires de Cotonou, au Bénin, et de 5 à 10 m/an sur environ 30 km de côte, au Togo. Cette caractérisation morphodynamique de plage, aussi bien à court qu'à long terme, est en réponse aux variations significatives du bilan sédimentaire dont les conséquences ' sont très importantes du fait de l'utilisation de l'espace pour des activités industrielles et urbaines très variées et de la forte...
Tipo: Journal Contribution Palavras-chave: COASTAL EROSION; Coastal zone; Growth; Population dynamics; Population number; Growth; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2001 URL: http://hdl.handle.net/1834/1236
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Pressions de sélection des variétés résistantes sur les populations de bioagresseurs: recherche de critères pour la sélection de variétés à résistance durable National Institute of Agronomic Research
Boissot, Nathalie; Palloix, Alain; Maisonneuve, Brigitte.
Tipo: Working Paper Palavras-chave: Selective pressure; Ecology; Population dynamics; Plant pathogen; Bioagresseur; Pression sélective; Ecologie; Dynamique des populations.
Ano: 2008 URL: http://hdl.handle.net/2174/185
Registros recuperados: 188
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