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| Registros recuperados: 26 | |
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| Lacerda, Carlos Henrique Figueiredo; Universidade Federal de Pernambuco; Hayashi, Carmino; Instituto de Pesca; Galdioli, Eliana Maria; Universidade de Maringá; Fernandes, Carlos Eduardo Bento; Universidade de Maringá. |
| The experiment had as objective to study the survival of Piaractus mesopotamicus and Oreochromis niloticus larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. niloticus, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L) containing one larvae of Odonate and 10 larvae of fish were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h), the remnant larvae of fish (alive) in each... |
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Palavras-chave: Experiment; Odonate; Fish larvae; Predator and prey experiment; Odonate; Fish larvae; Predator and prey. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5470 |
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| F. A., Shreen; Badr, S.E.; Morad, M.M.. |
| This study was carried out at a private farm in Owlad Sakr District, Sharkia governorate Egypt during 2015 summer season. It aimed to maximize wheat crop yield by modifying a stationary thresher. The modification involved tractor mounting the thresher to move among the field and the thresher was attached with a feeding device and a straw container. The experiment was established and designed statistically as a factorial experiment in complete randomized blocks with three replications. The tested treatments were wheat plant feeding rate levels of 500, 700,900 and 1100 kg/h and wheat plant moisture content levels of 16%, 18% and 20% (w.b.). The obtained results showed that the modified thresher decreased the total grain losses with 45.24%, increased the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Develop; Experiment; Threshing efficiency; Mobile thresher. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3505 |
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| Silva,Willerson Custódio da; Puiatti,Mário; Cecon,Paulo Roberto; Macedo,Leandro Roberto de; Sediyama,Tocio. |
| ABSTRACT: Taro is a tropical tuberous vegetable that produces cormels of high nutritional and energetic value. In recent years, its cultivation has expanded, creating the need for more research. However, the experimental plot size interferes directly with the precision of the experiment.Literature describes several methods for establishing the optimum experimental plot size. The objective of the current research was to estimate the optimal experimental plot size for taro culture, utilizing the Modified Maximum Curvature Method. The field experiment was conducted in the vegetable garden of the Departamentode Fitotecnia of Universidade Federal de Viçosa, from September 2011 to June 2012, with Japanese taro. Twenty-two rows with 20 plants each were planted,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colocasia esculenta; Yam; Experiment. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500201 |
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| Morvan, Barthelemy; Priour, Daniel; Guede, Zakoua; Bles, G.. |
| The evaluation of the mesh resistance to opening of fishing nets is an important issue in assessing the selectivity of trawls by numerical methods. Sala et al. (2007) proposed a method using a relatively expensive experimental device ensuring the 2D deformation of net sample. De la Prada and Gonzales (2015) proposed a simple uni-axial experimental set-up, which stretches a sample in the transverse direction of the meshes while leaving free its deformation in the normal direction. Both authors (Sala and De la Prada) assumed that the deformation is uniform in the sample. The present study aims at developing a finite element model taking into account the mesh resistance to opening of nets, allowing the simulation of non-uniform deformation. Mechanical... |
| Tipo: Text |
Palavras-chave: Netting; Mesh resistance to opening; Bending stiffness; Experiment; Numerical model. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00347/45813/49043.pdf |
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| Mycek, Paul; Gaurier, Benoit; Germain, Gregory; Pinon, Gregory; Rivoalen, Elie. |
| The ambient turbulence intensity in the upstream flow plays a decisive role in the behaviour of horizontal axis marine current turbines. Experimental trials, run in the IFREMER flume tank in Boulogne-Sur-Mer (France) for two different turbulence intensity rates, namely 3% and 15%, are presented. They show, for the studied turbine configuration, that while the wake of the turbine is deeply influenced by the ambient turbulence conditions, its mean performances turn out to be slightly modified. The presented conclusions are crucial in the view of implanting second generation turbines arrays. In addition, complete and detailed data sets (wake profiles and performance graphs) are made available to the scientific community in order to encourage further... |
| Tipo: Text |
Palavras-chave: Marine current turbine; Performance; Wake; Turbulence; Experiment; Flume tank. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00175/28647/27171.pdf |
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| Hammen, L. van der. |
| The present paper constitutes an introduction to taxonomic methodology. After an analysis of taxonomic practice, and a brief survey of kinds of attributes, the paper deals with observation, description, comparison, arrangement and classification, hypothesis construction, deduction, model, experiment, abstraction, and synthesis. The methodological aspects of the species-concept and of biological classification are dealt with in two final sections. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Abstraction; Classification; Comparison; Deduction; Description; Experiment; Hypothesis; Methodology; Model; Observation; Species-concept; Synthesis; Systematics; Taxonomy; 42.03; 42.70. |
| Ano: 1986 |
URL: http://www.repository.naturalis.nl/record/318283 |
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| Santos,Alejandra F. G. N.; Alcaraz,Carles; Santos,Luciano N.; Hayashi,Carmino; García-Berthou,Emili. |
| We experimentally examined the predator-prey relationships between juvenile spotted sorubim Pseudoplastystoma corruscans and young-of-the-year invasive and native fish species of the Paraná River basin, Brazil. Three invasive (peacock bass Cichla piquiti, Nile tilapia Oreochromis niloticus, and channel catfish Ictalurus punctatus) and two native (yellowtail tetra Astyanax altiparanae and streaked prochilod Prochilodus lineatus) fish species were offered as prey to P. corruscans in 300 L aquaria with three habitat complexity treatments (0%, 50% and 100% structure-covered). Prey survival was variable through time and among species (C. piquiti < O. niloticus < A. altiparanae < P. lineatus < I. punctatus), depending largely on species-specific prey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Experiment; Habitat Complexity; Predator-Prey Interactions; Pseudoplatystoma corruscans. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100016 |
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| Ule, Aljaz; Goeree, Jacob K.; Riedl, Arno. |
| This paper reports results from a laboratory experiment on network formation among heterogeneous agents. The experimental design extends the Bala-Goyal (2000) model of network formation with decay and two-way flow of benefits by allowing for agents with lower linking costs or higher benefits to others. Furthermore, agents' types may be common knowledge or private information. In all treatments, the (efficient) equilibrium network has a "star" structure. With homogeneous agents, equilibrium predictions fail completely. In contrast, with heterogeneous agents stars frequently occur, often with the high-value or low-cost agent in the center. Stars are not born but rather develop: with a high-value agent, the network's centrality, stability, and efficiency all... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Network Formation; Experiment; Heterogeneity; Private Information; Institutional and Behavioral Economics; C72; C92; D82; D85. |
| Ano: 2007 |
URL: http://purl.umn.edu/9099 |
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| Balgah, Roland Azibo; Buchenrieder, Gertrud. |
| Increasing occurrence of devastating natural shocks has stimulated research interest in the economics of natural disasters. Much of this scholarly work concentrates on effects of shocks on poverty, risk and vulnerability, and very little on understanding the effects of natural shocks on risk behavior. Referring to a 25 year-old disaster, we use unique survey data and experiment results from two disaster affected communities in rural Cameroon to test two hypotheses: (1) Natural shocks affect long term risk behavior; and (2) self-relocation into risk-prone areas is an explicit demonstration of risk taking. The results reveal differentiated risk behavior in self-relocated and state-resettled households, with the former taking higher risks compared to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Shocks; Risk behavior; Experiment; Cameroon; Risk and Uncertainty. |
| Ano: 2011 |
URL: http://purl.umn.edu/114215 |
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| Registros recuperados: 26 | |
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