757 research outputs found
Distribution of Idanthyrsus cretus(Polychaeta:Sabellariidae) in the Tropical Eastern Pacific and application of PCR-RAPD for population analysis.
No full textSabellariid polychaetes, commonly known as honeycomb worms, are capable of forming large reef-like aggregations. One species, Idanthyrsus cretus, has recently been found in several localities during surveys of Las Perlas Archipelago, Pacific Panama. Large reefs of this species have not been recorded elsewhere in the Tropical Eastern Pacific. The reef distribution patterns were examined and mapped with the aid of Geographical Information Systems. Principal Component Analysis showed that the distribution of polychaete reefs in Las Perlas Archipelago and the reef building itself seem to be mainly dependent on depth, suitable substrate, and topography,the potential particle size for tube building, and wave exposure. Cluster analysis of Random Amplified Polymorphic DNA with Polymerase Chain Reaction molecular techniques demonstrated that the polychaete reefs in Las Perlas Archipelago may be derived from one population
BANKING RATING IN ROMANIA. A COMPARATIVE ANALYSIS BETWEEN CAAMPL AND PERLAS MODELS
No full textIn this paper the author presents the evaluation method of the crediting risk in 20 Romanian banks, based on the
unique rating systems called CAAMPL and PERLAS models. The content of each component of this system is taken into
consideration and also the group of values attached to every component of credit risk analysis is highlighted. Finally, the
main measures that a bank has to take in order to limit credit risk are presented
De la sobreexplotación a la sustentabilidad: Nácar y perlas en la historia mundial
No full textLa historia mundial de la pesca, el cultivo y el comercio de las perlas y del nácar es un tema vasto y cautivante. Desde la antigüedad hasta la actualidad, nos lleva en un recorrido a través de los mitos sobre el origen de las perlas y sus diferentes usos; el esfuerzo de buzos y marinos; la tenacidad de los científicos que trabajaron para descubrir el fenómeno de su formación; la ambición humana hacia uno de los objetos más apreciados del mundo; la originalidad de técnicas comerciales; y, sobre todo, haber pasado de la devastación de un recurso natural a su manejo
Alpheus perlas, sp. nov., a new infaunal snapping shrimp from the Pacific coast of Panama (Malacostraca: Decapoda: Alpheidae)
No full textAnker, Arthur, Pachelle, Paulo P.G. (2019): Alpheus perlas, sp. nov., a new infaunal snapping shrimp from the Pacific coast of Panama (Malacostraca: Decapoda: Alpheidae). Zootaxa 4651 (1): 75-84, DOI: 10.11646/zootaxa.4651.1.
FIGURE 3 in The eastern Pacific species of Salmoneus Holthuis, 1955, with description of a remarkable new species from Las Perlas Archipelago, Panama (Malacostraca: Decapoda: Alpheidae)
No full textFIGURE 3. Salmoneus tiburon sp. nov.: holotype, non-ovigerous specimen (cl 8.8 mm) from Las Perlas, Panama, MZUSP 34070 [a–d]; paratype, post-ovigerous specimen (cl 8.2 mm) from Las Perlas, Panama, OUMNH.ZC. 2015-08-0035 [e, f]; a—major cheliped, mesial view; b—same, lateral view; c—same, distal portion of merus, carpus and chela, ventrolateral view; d—same, chela fingers, mesial view; e—minor cheliped, lateral view; f—same, carpus and chela, mesial view.Published as part of Anker, Arthur, 2019, The eastern Pacific species of Salmoneus Holthuis, 1955, with description of a remarkable new species from Las Perlas Archipelago, Panama (Malacostraca: Decapoda: Alpheidae), pp. 125-140 in Zootaxa 4651 (1) on page 129, DOI: 10.11646/zootaxa.4651.1.8, http://zenodo.org/record/335923
Acoustic mapping of fish aggregation areas to improve fisheries management in Las Perlas Archipelago, Pacific Panama
No full textThe purpose of this study was to investigate, characterize and map areas of the seabed of Las Perlas Archipelago (LPA), Republic of Panama using swath-bathymetry acoustic sonar techniques and to assess these methods as tools for feeding information into management zoning policy. In 2007 the LPA was granted conservation protection under national legislation. However, detailed management plans are still pending. Seabed mapping plays a fundamental role in identifying areas which should be prioritized within the management framework. Visual representation of habitat maps provides an effective medium for involving stakeholders in a co-management arena. In this survey, acoustically mapped areas of the seabed were ground-truthed using a combination of benthic grab samples, drop-down video and diver observations. The resulting mapped areas were then incorporated into a Geographic Information System (GIS) for further analysis. The output was a physical characterization of the seabed at three locations selected for being areas of high rugosity (habitat complexity) and, therefore, their potential importance as valuable fish aggregation sites. The rocky reefs and rhodolith beds identified in this survey represent particularly important fish aggregation and nursery habitats which should be considered priorities for protection under the management plans. This survey demonstrated the use of acoustic techniques to spatially resolve topographic features and physical characteristics of the seabed, illustrating their potential value as tools for fisheries management and marine reserve zoning in Las Perlas Archipelago and elsewhere. © 2010 Elsevier Ltd.</p
PERLAS DE QUITOSANO CON PARTÍCULAS MAGNÉTICAS Y SU APLICACIÓN EN LA ADSORCIÓN DE IONES DE Cu (II)
No full textThe objective of this work is to prepare chitosan beads with magnetic properties for use in the adsorption of Cu (II). Through a process reported in the literature have been obtained with micro chitosan beads magnetite particles of2,5 mm diameter in the wet state and diameter of 0,8 mm when dry. Subsequently chitosan beads adsorption used for Cu (II), in a batch system, determining which optimum pH is in the range of 4.7 to 5.2. The study of the kinetics of the adsorption process showed that thermodynamic equilibrium is attained 250 min before starting the process. The experimental data described adsorption by the Langmuir model and found that the maximum adsorption capacity is qmax = 235,84 mg/g constant value Langmuir, b = 0,00442El objetivo del trabajo es preparar perlas de quitosano con propiedades magnéticas para utilizarlas en la adsorción de Cu(II). Mediante un proceso reportado en la literatura se han obtenido perlas de quitosano con micro partículas de magnetita de 2,5 mm de diámetro en estado húmedo, y de 0,8 mm de diámetro en estado seco. Posteriormente las perlas de quitosano se emplean para la adosrción de Cu(II), en un sistema batch, determinándose que pH óptimo se encuentra en el intervalo de 4,7 a 5,2. El estudio de la cinéticadel proceso de adsorción demostró que el equilibrio termodinámico se alcanza antes de 250 min deiniciado el proceso. Los datos experimentales de la adsorción se describen por el modelo de Langmuir yse ha determinado que la máxima capacidad de adsorción es qmax=235,84 mg/g y valor de la constantede Langmuir, b=0,00442
Composición y estructura de larvas del orden Trichoptera (Arthropoda: Insecta) en la quebrada Las Perlas, Ibagué - Colombia
No full textEl orden Trichoptera es un grupo de insectos muy abundante y diverso en los ecosistemas acuáticos donde funciona como base de la cadena trófica, degrada materia orgánica y es sensor de las alteraciones fisicoquímicas. Se planteó determinar la composición y estructura de los tricópteros relacionada con los sustratos y variables fisicoquímicas de la quebrada Las Perlas. Se monitorearon tres estaciones de la quebrada durante seis periodos de muestreo, la colecta se llevó a cabo con red Surber en cuatro sustratos (arena, grava, hojarasca y roca). Las muestras colectadas determinadas hasta el nivel taxonómico de género. Se colectaron 5831 organismos, distribuidos en 17 géneros y 9 familias, donde la el género Helycopsyche (Helicopsychidae) fue el más abundante (2200 ind.), seguido de los géneros Smicridea (1808 ind.). El análisis de ordenación NMDS apoyado con ANOSIM muestra que existen diferencias significativas entre el ensamblaje de las tres estaciones evaluadas. Los sustratos roca y grava son los preferidos por la mayoría de tricópteros para establecer sus redes de filtración y capullos púpales. Temporalmente la distribución de los organismos esta modulada por el efecto del caudal, siendo los periodos de bajas lluvias M3 y M4 los que presentaron mayor densidad de organismos. Por último el análisis de correspondencia canónica muestra que ninguna variable presenta efectos condicionantes sobre la distribución de los organismos. Estos resultados amplían el conocimiento de la fauna de tricópteros de la región y aportan información del estado ambiental de la quebrada Las Perlas, fuente importante y abastecedora de la población de Ibagué.The Trichoptera order is a very abundant and diverse group of insects in aquatic ecosystems where it functions as the base of the trophic chain degrades organic matter and is a sensor of physicochemical alterations. It was proposed to determine the composition and structure of the Trichoptera related to the substrates and physicochemical variables of the Las Perlas stream. Three stations of the stream were monitored during six sampling periods; the collection was carried out with Surber network on four substrates (sand, gravel, leaf litter and rock). The samples collected determined up to the taxonomic gender level. 5831 organisms were collected, distributed in 17 genera and 9 families, where the genus Helicopsyche (Helicopsychidae) was the most abundant (2200 ind.), Followed by the genera Smicridea (1808 ind.). The NMDS ranking analysis supported with ANOSIM shows that there are significant differences between the assemblies of the three stations evaluated. Rock and gravel substrates are preferred by most Trichoptera to establish their filtration networks and buds. Temporally distribution of the organisms is modulated by the effect of the flow, being the periods of low rainfall M3 and M4 those that presented a higher density of organisms. Finally, the analysis of canonical correspondence shows that no variable has conditioning effects on the distribution of organisms. These results broaden the knowledge of the Trichoptera of the region and provide information on the environmental status of the Las Perlas stream, an important source and supplier of the Ibague population
Nuestra Señora de la Fuensanta [Material gráfico] : de la Iglesia de San Juan Bautista de Coín
No full textVirgen siglo XV: alto 92 mm. de piedra. La corona de plata hecha en 1619. Dorados los apliques y balaustres. La corona alta en vez de perlas tiene ahora brillantes. La base es un aro de oro, con esmeraldas cuadradas y perlas. Las cartelas dicen: Monstrate esse Matrem tu gloria tu letia Jerusalen Israel.Dimensiones: Virgen 6'9 cm., Alto 57 ½ cm [anda?], urna y grada: 1'72 cm. [sic].Clisé pertenece a: J. Tembour
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