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| Registros recuperados: 145 | |
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| Huigen, Marco G. A.; Leiden University; mhuigen@uni-hohenheim.de; Overmars, Koen P.; Leiden University; overmars@cml.leidenuniv.nl; de Groot, Wouter T.; Leiden University; degroot@cml.leidenuniv.nl. |
| Land-use system dynamics and demographic dynamics are tightly coupled. In environmental science and studies of changes in land use and land cover, an unequivocal relationship is sometimes found between both systems, especially in coarse-scale studies. To obtain a better understanding of these intermingling dynamics, we formulated an agent-based model, the MameLuke settlement model, that used a deductive approach to investigate these relationships. The model was constructed based on ethnographic histories of farm households in San Mariano, the Philippines. The model was calibrated visually. Although this calibration approach proved to be very inefficient, the model itself still outperformed a random model. The model formulation process and the model... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Actor decision-making; Agent-based models; Ethnic distribution; Ethnographic history; Land-use dynamics; Mameluke framework; Philippines; Population dynamics. |
| Ano: 2006 |
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| Mendonça, Jr.,Milton de S.; Romanowski,Helena P.. |
| Our understanding of the population ecology of insect gallers is largely built on examples from temperate zones, but tropical and subtropical gallers may present distinct patterns of abundance and distribution across time. Eugeniamyia dispar Maia, Mendonça & Romanowski, 1996 is a multivoltine Neotropical cecidomyiid that induces spongy leaf galls on Eugenia uniflora (Myrtaceae). Galls were censused in the urban area of Porto Alegre, southern Brazil on six plants at two sites, for two years, at roughly weekly intervals. Overall 9,694 eggs, galling attempts and galls were counted. New galls continuously appear on developing leaves, but galls with live inducers are absent from June to at least early August. Galls on a same shoot develop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Eugenia uniflora; Gall-inducer; Myrtaceae; Population dynamics. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200009 |
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| 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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| OLIVEIRA, C. M. de; RESCK, D. V. S.; FRIZZAS, M. R.. |
| RESUMO: Este trabalho objetivou avaliar a influência de sistemas de preparo de solo e de rotação de culturas e pastagem na abundância e dinâmica de artrópodes edáficos. O experimento, instalado em Planaltina, DF, foi composto por 17 tratamentos que corresponderam a sistemas de preparo de solo (convencional e direto) e a rotação de culturas, pastagem e vegetação nativa (Cerrado). Realizaram-se amostragens de solo em três profundidades (0-5 cm, 5-10 cm e 10-20 cm) e em quatro épocas do ano (fevereiro, maio, agosto/setembro e outubro/novembro) entre 2003 e 2006. Os artrópodes foram extraídos em funil de Berlese-Tüllgren e identificados com relação à ordem. Coletaram-se artrópodes pertencentes a três classes: Insecta, Arachnida e Collembolla. Observou-se que... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Entomologia; Dinâmica Populacional; Inseto; Gramínea; Leguminosa; Manejo do Solo.; Grasses; Entomology; Legumes; Population dynamics; Soil management.. |
| Ano: 2006 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570260 |
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| FAZOLIN, M.; LEDO, A. da S.. |
| A demanda por informações sobre o cultivo da gravioleira na região de Rio Branco, vem aumentando consideravelmente, principalmente no que se refere ao ataque de pragas. O ataque de insetos, afeta a qualidade dos frutos ou inviabilizam a sua comercialização, pela baixa qualidade que apresentam. Os frutos são danificados tanto interna como externamente, sendo que, cm ambos os casos, é comum a ocorrência de patógenos, que agravam ainda mais o problema. Este trabalho teve por objetivo fornecer informações sobre os insetos que se alimentam dos frutos de graviola em Rio Branco, dentro de uma proposta para a definição de wn manejo integrado dessas pragas na Região. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Guanabana; Ensacamento do fruto; Cerconota anonella; Broca da semente; Bephrateloides spp; Antiteuchus sepulcralis; Cigarrinha da graviola; Hemispherical scale; Rio Branco (AC); Acre; Western Amazon; Amazonia Ocidental; Trigona spp; Ceresa peruensis; Citrus snow scale; Bees; Abeja; Sapotes agrios.; Métodos de control; Dinámica poblacional; Control físico; Cochinilla; Plagas de plantas; Percevejo; Broca do fruto; Flutuação populacional; Controle mecânico; Inseto; Annona muricata; Irapuã.; Graviola; Praga de planta; Abelha; Saissetia coffeae; Cochonilha; Plant pests; Insecta; Unaspis citri; Apoidea.; Control methods; Soursops; Population dynamics; Physical control; Scale insects. |
| Ano: 1997 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492604 |
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| Muths, D.; Jollivet, D.; Gentil, F.; Davoult, D.. |
| The brittle star Ophiothrix fragilis (Abilgaard, 1789) constitutes a heterogeneous morphological group that can be subdivided into 4 varieties. The species is also characterized by high demographic variability. The present study explores the possibility of genetic patchiness arising due to admixture of varieties or recruitment heterogeneity. We sequenced a portion of the mitochondrial cytochrome oxidase subunit I (mtCOI) gene and genotyped 7 allozymes from 21 populations of the 2 most common varieties. While mtCOI analyses showed that all the varieties grouped together with virtually no divergence among them (< 1%), a clear divergence (18.6%) was evident between the northern Atlantic populations and individuals collected in the Mediterranean and along... |
| Tipo: Text |
Palavras-chave: Echinoderm; Allozyme; MtCOI; Population dynamics; Ecotypes; Dispersal; Recruitment. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00301/41247/40439.pdf |
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| Thomas, Yoann; Dumas, Franck; Andrefouet, Serge. |
| The black-lip pearl oyster (Pinctada margaritifera) is cultured extensively to produce black pearls, especially in French Polynesia atoll lagoons. This aquaculture relies on spat collection, a process that experiences spatial and temporal variability and needs to be optimized by understanding which factors influence recruitment. Here, we investigate the sensitivity of P. margaritifera larval dispersal to both physical and biological factors in the lagoon of Ahe atoll. Coupling a validated 3D larval dispersal model, a bioenergetics larval growth model following the Dynamic Energy Budget (DEB) theory, and a population dynamics model, the variability of lagoon-scale connectivity patterns and recruitment potential is investigated. The relative contribution of... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Lagoon; Biophysical modelling; Connectivity; Population dynamics; DEB model. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00321/43192/42926.pdf |
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| Registros recuperados: 145 | |
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