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Registros recuperados: 12
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Análisis de clasificación de series temporales: el caso de la salinidad en la Ciénaga Grande de Santa Marta OceanDocs
Giraldo-H., R.; Martínez-C., J.; Hurtado-T., L.H.; Zea, S.; Madera-R., E.R..
Se realizó una clasificación numérica de 21 estaciones de monitoreo del sistema laguno -estuarino comprendido por la Ciénaga Grande de Santa Marta y el Complejo Pajarales, de acuerdo a su similaridad en el comportamiento de la salinidad del agua. Se utilizó información quincenal comprendida entre enero de 1987 y octubre de 1991. Debido a la estructura de autocorrelación de los datos fue necesario emplear los modelos ARIMA de series de tiempo en primer lugar, y posteriormente aplicar una técnica de clasificación normal con los coeficientes de la representación infinita AR calculados para cada estación. Los resultados del análisis fueron coherentes con las hipótesis planteadas acerca de la distribución de la variable en el sistema.
Tipo: Journal Contribution Palavras-chave: Ecology; Salinity effects; Autocorrelation; Monitoring; Coastal lagoons; Estuaries; Statistical analysis; Ecology; Monitoring; Estuaries; Statistical analysis; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_4911; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1995 URL: http://hdl.handle.net/1834/3813
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Aplicación estadística en los bioensayos de toxicidad con sedimentos extraído del Estero Salado, canal de acceso al Puerto Marítimo de Guayaquil OceanDocs
Villamar, F..
With the purpose of proving and determining in a short term the impact of the dredged material that can be caused by the organisms that inhabit the marine-estuary ecosystem, was performed toxicity bioassay of the sediment extracted from the bottom of the Salado Estuary. This sediment obstructs the access channels of the Marítime Port of Guayaquil. For this bioassay, was used white shrimp larvae of the species Litopenaeus vannamei, a commercially important organism that depends for its food on the organic detritus coming from the sediment and the column of estuary water in the studied area. The results obtained were analyzed applying the graphic arithmetic method and statistical analysis, through which it was determined that there is a direct relation...
Tipo: Journal Contribution Palavras-chave: Bioassays; Toxicity; Marine organisms; Sediments; Statistical analysis; Kurtosis; Dredged samples; Bioassays; Toxicity; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002 URL: http://hdl.handle.net/1834/2257
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Bulletin des statistiques de pêche en ZEE de la République Islamique de Mauritanie en 1987 OceanDocs
Foucher, E.; Damiano, A..
Ce Bulletin préparé par Alain Damiano, Eric Foucher et l'ensemble du personnel du Service Statistique du CNROP présente les statistiques de pêche pour l'année 1987
Tipo: Other Palavras-chave: Collecte de données; Description des pêcheries; Effort de pêche; Flottille de pêche; Traitement des données; Statistiques des pêches; Statistical analysis; Statistical sampling; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1989 URL: http://hdl.handle.net/1834/1095
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Caractères biométriques de la Squille <Squilla mantis> dans les eaux tunisiennes OceanDocs
Mili, S.; Jarboui, O..
Pour l’étude biométrique de la squille Squilla mantis, un échantillonnage régulier a été réalisé dans le golfe de Tunis, le golfe de Hammamet et le golfe de Gabès de janvier 2005 à décembre 2006. Les équations morphométriques de la squille, dans le golfe de Gabès, ont montré que la croissance relative du telson, celle de la masse totale et celle de la masse éviscérée par rapport à celle du céphalothorax sont caractérisées par une allométrie positive. Par contre, la longueur totale croît négativement par rapport à celle du céphalothorax. Pour le golfe de Hammamet, ces caractères ont une croissance marquée par une allométrie négative à part la masse éviscérée. Les équations morphométriques de la squille du golfe de Tunis ont montré une allométrie positive...
Tipo: Journal Contribution Palavras-chave: Squilla mantis; Biometrics; Comparative studies; Population dynamics; Statistical analysis; Shrimp culture; Statistical analysis; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2008 URL: http://hdl.handle.net/1834/3789
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Estimación cuantitativa del descarte en la pesquería de merluza realizado por la flota comercial argentina OceanDocs
Dato, C.V.; Bambill, G.A.; Cañete, G.R.; Villarino, M.F.; Aubone, A..
Based on the comparison between length composition of landings and that of research cruises, filtered by the selectivity of the mesh used by the commercial fleet, to rebuild length distribution of catches, an indirect quantitative method was developed and used to estimate, in weight and number, the individuals discarded by the commercial fleet south of 41° S. Discards ranged between 15,563 and 46,113 annual tons in the 1986-1993 period which represented 10-13% in weight and 28-32% in number of actual catches, composed of around 87% of individuals age group 1, 12% of age group 2 and the rest of individuals age groups 0 and 3.
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Commercial fishing; Statistical analysis; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2006 URL: http://hdl.handle.net/1834/1587
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Estudio de las características sedimentológicas de la zona costera frente al balneario de Manta, Ecuador OceanDocs
Soledispa P., B..
se estudian 17 muestras de sedimentos superficiales de fondo de la zona costera de Manta. Se presentan las características sedimentológicas en base al análisis granulométrico, parámetros estadísticos y distribución de los sedimentos. Se establece que los sedimentos arenosos predominan en el área, y se ubican en el lado oeste y este del área de estudio. También hay limo y mezclas de este con arena.
Tipo: Journal Contribution Palavras-chave: Sediments; Sediment distribution; Granulometry; Statistical analysis; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2009 URL: http://hdl.handle.net/1834/3363
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Evaluación de la polaca (Micromesistius australis) del Atlántico sudoccidental, período 1987-1999. OceanDocs
Wöhler, O.C.; Cordo, H.D.; Cassia, M.C.; Hansen, J.E..
Taking into account the commercial catches by the Argentine fleet and other fleets that operated around Malvinas Islands (SW Atlantic) in the 1987-1999 period, the current state of southern blue whiting (Micromesistius australis) is assessed. A sequential analysis (Cohort Analysis) tuned, in an ADAPT conceptual framework with six independent indices of abundance, was performed for the southern blue whiting stock of the SW Atlantic. Commercial catch data of the Argentinian fleet and other fleets that operate around Malvinas Islands were used.The indices included catch per unit of effort of different fleets and data from Argentine-British research surveys. The analysis showed that the decreasing trend in biomass observed in previous studies went on during...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishing mortality; Biomass; Demersal fisheries; Statistical analysis; Gadoid fisheries; Stock assessment; Biomass; Demersal fisheries; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002 URL: http://hdl.handle.net/1834/2546
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Impact of agro-industrial activities on the water quality of River Nyando, Lake Victoria Basin, Kenya OceanDocs
Raburu, P. O.; Okeyo-Owuor, J.B..
The impact of agro-industrial activities on the water quality within River Nyando, Lake Victoria Basin (Kenya) was studied at different hierarchical levels between August 1997 and June 1999. Triplicate water samples were collected on a monthly basis from various stations ranging from the source to the mouth of the river and analyzed for selected physical and chemical water quality parameters using standard analytical methods. Statistical analysis was performed using MINITAB and STATISTICA computer packages. Agricultural land use was found to be the major factor contributing to changes in water quality. Salinity and pH varied at river basin scale, turbidity, TDS and conductivity at catchment scale, while DO, alkalinity and pH at subcatchment and river reach...
Tipo: Proceedings Paper Palavras-chave: Water quality; Environmental impact; Industrial wastes; Inland waters; Rivers; Anthropogenic factors; River basin management; Statistical analysis; Physicochemical properties; Land use; Limnological data; Environmental monitoring; Resource management; Environment management; Agricultural pollution; Water quality; Environmental impact; Rivers; Statistical analysis; Land use; Environmental monitoring; Industrial wastes; Inland waters; Anthropogenic factors; Physicochemical properties; Resource management; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_4182; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_11763; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_13330; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006 URL: http://hdl.handle.net/1834/3501
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Introducción al análisis Bayesiano OceanDocs
Hernandez, D.R..
An introduction to the Bayesian Analysis is presented and conceptual aspects highlighted. Initially, the probability concept is analyzed from its objective perspective such as frequency, and from its subjective perspective such as degree of belief. It is discussed how, within the context of Bayesian statistics, probability as degree of belief allows to give sense to the probability of a hypothesis and, therefore, enables to resolve problems of scientific interest that could not be otherwise addressed. The likelihood concept is discussed and the Bayes formula, which integrates a priori information and knowledge with information provided by current data demonstrated. Basic concepts of the Decision Theory within the Bayesian perspective are introduced. The...
Tipo: Book Palavras-chave: Statistical analysis; Statistical models; Fishery resources; Stock assessment; Prediction; Probability theory; Statistical analysis; Stock assessment; Fishery resources; Prediction; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_29367.
Ano: 2007 URL: http://hdl.handle.net/1834/2560
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Regeneración de colonias y transplante de fragmentos de Acropora palmata (Cnidaria: Scleractinia) en el Parque Nacional Natural Corales del Rosario, Caribe colombiano OceanDocs
García-U., R. P.; Alvarado-Ch., E. M.; Acosta, A..
El presente trabajo fue realizado con el fin de estudiar la posibilidad de recuperación de la especie de coral Acropora pálmate en el Parque Nacional Natural Corales del Rosario. Se determinó el porcentaje de regeneración de 42 colonias fragmentadas mecánicamente y la sobrevivencia de 53 fragmentos de esta especie. El tiempo de regeneración del tejido coralino para 25 colonias fragmentadas entre septiembre y diciembre de 1992 (período 1), fue de 3 meses; para las 17 colonias fragmentadas entre marzo y mayo de 1993 fue de 2 meses. Los fragmentos obtenidos de las colonias donantes fueron sometidos a 4 tratamientos. El tratamiento 1 consistió en el amarre con pita del fragmento a coral muerto y el traslado hacia Isla Kalua. Para el tratamiento 2, se colocaron...
Tipo: Journal Contribution Palavras-chave: Ecology; Condition factor; Survival; Regeneration; Statistical analysis; Ecology; Statistical analysis; Survival; Regeneration; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_7538; Http://aims.fao.org/aos/agrovoc/c_6486.
Ano: 1995 URL: http://hdl.handle.net/1834/3773
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Régimen del oleaje en la zona de Jaramijó y Salinas OceanDocs
Vera, L..
Mediante el uso de series de tiempo de altura y período de olas, medidas cada tres horas durante aproximadamente 6 años consecutivos, se realizó un análisis estadístico del comportamiento estacional y mensual de las ondas en las localidades de Jaramijó y Salinas, encontrándose que las alturas de olas muestran diferencias estacionales. Los mayores valores se encontraron en la época húmeda (Enero a mayo). Se realizó el análisis espectral de la serie, de donde se deducen los picos de frecuencia más significativos y se determina que el régimen de oleaje, es el mismo en las dos localidades.
Tipo: Journal Contribution Palavras-chave: Wave period; Spectral analysis; Time series; Statistical analysis; Statistical analysis; Spectral analysis; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_28964.
Ano: 2000 URL: http://hdl.handle.net/1834/2244
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Sobre los conceptos de utilización de biomasa excedentes de merluza de cola Macruronus magellanicus bajo esquemas de administración pesquera basadas en F 0,1, y F 30. RDP. OceanDocs
Ehrhardt, N.M.; Legault, C.; Prenski, L.B..
In this work we present a process of risk analysis related to the adoption of a Total Allowable Catch (TAC)based in series of allowable biological catches which contain uncertainty derived of the recruitment patterns which characterize the stock. With the information obtained by the F0,1, and F30. RDP, the exploitation ratio and with the 500 values of the projected biomass of 1995 obtained by Monte Carlo simulation, we calculate the distribution of the allowable biological catches under a scheme of F0,1, and F30. RDP andfor a natural mortality of 0.38. The selected TAC is expected to beas closer as possible to the reference fishery mortality F0,1, and F30. RDP. As a result of the present risk analysis in this study in Macruronus magellanicus of the SW...
Tipo: Journal Contribution Palavras-chave: Fishery management; Risks; Biomass; Statistical analysis; Gadoid fisheries; Fishery management; Biomass; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1997 URL: http://hdl.handle.net/1834/1936
Registros recuperados: 12
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