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para basin » pucara basin (Expander búsqueda), para brasil (Expander búsqueda), plata basin (Expander búsqueda)
1
artículo
Publicado 2020
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Small-scale fishing, such as that of the Tahuayo river basin (CRT) has been little studied despite its importance as a protein supply for the region. This article presents the fisheries' main ecological features in the CRT based on of an analysis of fish landings. Between August 2016 and July 2017, the richness and composition of species, biomass and catches per unit of effort (CPUE) were evaluated, by hydrological periods, aquatic environments and communities. The captures presented 62 species, grouped into 23 families and 7 orders, with the Pimelodidae family being the most diverse (12 species). Species richness was very similar between hydrological periods and between aquatic environments. The total landing amounted to 13,805.38 kg, where 17 species represented 80.5% of the biomass. More than 50% of the biomass was landed in periods of...
2
tesis doctoral
Publicado 2018
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Se han producido cuatro eventos extremos de El Niño en las últimas cinco décadas (1972/1973, 1982/1983, 1997/1998 y 2015/2016) y se caracterizaron como fuertes en la región de Niño 3.4. Presentan diferencias significativas en su evolución que inducen a anomalías distintas de precipitaciones a lo largo de la vertiente del Pacífico peruano que ilustran la no linealidad de la teleconexión ENSO en precipitaciones en esta región. Las lluvias extremas tienen un impacto negativo en la población y los sectores productivos debido a las inundaciones y deslizamientos de tierra que se producen. Sin embargo, hasta la fecha, los patrones de circulación climática clave para sus diferentes tendencias y magnitudes aún son muy poco conocidos. En esta tesis mostramos que las diferentes configuraciones de precipitación durante estos eventos están asociadas con el transporte de humedad desde ...
3
artículo
The present study compares the patterns of fish’s diversity of the Alto Yurúa Basin. The study area included three sub basins: Beu, Breu and Yurúa, all without anthropogenic impact. Fishing was carried out with trawls, 10564 individuals were collected and 185 fish’s species were identified. In regional scale, the average of the Shannon diversity index (H’) for Beu was of 2,02; for Breu 1,84 and Yuruá 1,75. The rarefaction analysis shows to Yurúa with the highest species richness (91 spp.), in comparison with Beu (87) and Breu (68). In the local scale, the diversity average (H’) was highest in lotic environments (Beu 2,04; Breu 1,90; and Yurúa 1,86), compared with respective lentics environments (Beu 1,66; Breu 1,86; and Yurúa 1,82). The highest diversity of fishes observed in lotic environments could be explained because the most of Amazonian fishes have the behavior to tra...
4
artículo
The present study compares the patterns of fish’s diversity of the Alto Yurúa Basin. The study area included three sub basins: Beu, Breu and Yurúa, all without anthropogenic impact. Fishing was carried out with trawls, 10564 individuals were collected and 185 fish’s species were identified. In regional scale, the average of the Shannon diversity index (H’) for Beu was of 2,02; for Breu 1,84 and Yuruá 1,75. The rarefaction analysis shows to Yurúa with the highest species richness (91 spp.), in comparison with Beu (87) and Breu (68). In the local scale, the diversity average (H’) was highest in lotic environments (Beu 2,04; Breu 1,90; and Yurúa 1,86), compared with respective lentics environments (Beu 1,66; Breu 1,86; and Yurúa 1,82). The highest diversity of fishes observed in lotic environments could be explained because the most of Amazonian fishes have the behavior to tra...
5
artículo
Publicado 2025
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The article presents a methodological proposal for assessing water sustainability in river basins using the Water Sustainability Index (WSI) and its application in the river basins of Chili, Caplina, Chancay-Lambayeque, and Urubamba, as well as at the national level in Peru, for the period 2012-2021. The WSI consists of three sub-indices based on the components of sustainable development: economic (SiE), social (SiS), and environmental (SiA). The WSI rating scale ranges from 0 (lowest) to 100 (highest). Intrinsic and extrinsic indicators, both economic, social, and environmental, were selected. The results show that, both at the basin level and nationally, the social component performs best. However, significant challenges remain in the environmental component (Caplina and Chili river basins) and the economic component (Chancay-Lambayeque, Chili, Urubamba river basins, and national level...
6
tesis de maestría
Publicado 2025
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Los ríos amazónicos forman una red compleja y altamente dinámica, donde el comportamiento fluvial está determinado por controles geomorfológicos e hidrológicos.. Dentro de esta red, los ríos se clasifican en dos tipos principales, meándricos, con alta sinuosidad y migración lateral, y anabranching, con múltiples canales e islas internas. Para analizar la variabilidad interna entre secciones fluviales, se llevó a cabo un estudio planimétrico multitemporal en la cuenca alta del Amazonas: Huallaga, Ucayali, Marañón, Amazonas, Napo, Japurá, Putumayo, Juruá y Yavarí. Los ríos se segmentaron según su estructura geomorfológica, confluencias, cambios en la posición del canal y grado de confinamiento. El estudio integró métricas del canal y de las islas y generó 184 variables geomorfológicas para tres escalas espaciales, semi-meandro, meandro y río completo, incorporando...
7
artículo
Publicado 2021
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The characterization and delimitation of the existing vegetation cover in a given geographic area is of vital importance for an adequate management of natural resources. In this sense, this research proposes a methodology to delimit the types of vegetation cover in the Quillcay sub-basin. The study area is located in the districts of Huaraz and Independencia, province of Huaraz, Ancash; in the middle western slope of the Cordillera Blanca and Santa river basin. The delimitation of the vegetation cover began with the identification of the dominant vegetation cover types (Andean grassland, forest, wetland and shrub thicket); then, the geographic characteristics (slope and altitude) were defined for each type of vegetation cover. Subsequently, layers were generated with the Spectral Angle Mapper (SAM) classifier and the calculation of the Normalized Difference Moisture Index (NDMI). Finally...
8
artículo
Publicado 2021
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The characterization and delimitation of the existing vegetation cover in a given geographic area is of vital importance for an adequate management of natural resources. In this sense, this research proposes a methodology to delimit the types of vegetation cover in the Quillcay sub-basin. The study area is located in the districts of Huaraz and Independencia, province of Huaraz, Ancash; in the middle western slope of the Cordillera Blanca and Santa river basin. The delimitation of the vegetation cover began with the identification of the dominant vegetation cover types (Andean grassland, forest, wetland and shrub thicket); then, the geographic characteristics (slope and altitude) were defined for each type of vegetation cover. Subsequently, layers were generated with the Spectral Angle Mapper (SAM) classifier and the calculation of the Normalized Difference Moisture Index (NDMI). Finally...
9
artículo
Publicado 2012
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The pollution of the continental waters is a problem at a world scale, mainly due to the impact of the mining tailings. Using top technologies as neutralization plants of acid waters, many companies are mitigating the impact of this functioning; so taking as a reference the changes in the concentration of heavy metals present in water, soils and cultivations of the high, middle and low basin of the Moche river, samplings of water were obtained at eight stations of the Moche river (Trujillo, Peru), and in four sectors of its margins for soils and cultivations. The most representative heavy metals in water were found in the high basin during the year 1980: iron (557.500 ppm), lead (100.375 ppm), cadmium (4.550 ppm), copper (6.900 ppm), zinc (262.900 ppm) and arsenic (9.000 ppm); whereas in the soils the higher concentrations were found on the right margin of median basin in the year 1980: ...
10
artículo
Publicado 2012
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The pollution of the continental waters is a problem at a world scale, mainly due to the impact of the mining tailings. Using top technologies as neutralization plants of acid waters, many companies are mitigating the impact of this functioning; so taking as a reference the changes in the concentration of heavy metals present in water, soils and cultivations of the high, middle and low basin of the Moche river, samplings of water were obtained at eight stations of the Moche river (Trujillo, Peru), and in four sectors of its margins for soils and cultivations. The most representative heavy metals in water were found in the high basin during the year 1980: iron (557.500 ppm), lead (100.375 ppm), cadmium (4.550 ppm), copper (6.900 ppm), zinc (262.900 ppm) and arsenic (9.000 ppm); whereas in the soils the higher concentrations were found on the right margin of median basin in the year 1980: ...
11
tesis de maestría
Publicado 2020
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Evalúa la influencia de la variabilidad atlántica en la precipitación de la Cuenca Amazónica. Este estudio proporciona un análisis detallado, en la escala de tiempo interanual, de la influencia del Pacífico tropical y el Océano Atlántico en el régimen de precipitaciones sobre América del Sur, con un enfoque en la Cuenca Amazónica. Para ello, se utilizan datos mensuales de temperatura de la superficie del mar para determinar los principales modos de variabilidad en tres regiones atlánticas: Atlántico norte tropical (TNA), Atlántico sur tropical (TSA) y Atlántico sur subtropical (STSA). Además, se analizó la interacción Pacífico y Atlántico mediante correlaciones móviles y ondeletas cruzadas para el período 1880-2017. Descubrimos que las regiones del Atlántico se han estado acoplando y desacoplando en períodos específicos. Asimismo, los océanos Pacífico y Atlánt...
12
artículo
Publicado 2022
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Despite its importance in the local economy and food supply, the fishing carried out by riverside communities has been little studied. This paper presents the main characteristics of fishing in Lake Aripari based on the analysis of fish landing records. Between April 2018 and February 2019, species' richness and composition, landed biomass, catch per unit effort (CPUE) by hydrological periods, and the nutritional contribution of species destined for human consumption were evaluated. Forty-seven species were recorded, grouped into 23 families and 9 orders, with the Pimelodidae family being the most diverse (6 species). Species' richness was higher during the dry season, dominated by species of local migration and piscivorous habits. The total landings amounted to 10 650.7 kg, where 14 species accounted for 85.0% of the biomass. Sixty-seven percent of the biomass was for sale, with more th...
13
artículo
Publicado 2022
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Despite its importance in the local economy and food supply, the fishing carried out by riverside communities has been little studied. This paper presents the main characteristics of fishing in Lake Aripari based on the analysis of fish landing records. Between April 2018 and February 2019, species' richness and composition, landed biomass, catch per unit effort (CPUE) by hydrological periods, and the nutritional contribution of species destined for human consumption were evaluated. Forty-seven species were recorded, grouped into 23 families and 9 orders, with the Pimelodidae family being the most diverse (6 species). Species' richness was higher during the dry season, dominated by species of local migration and piscivorous habits. The total landings amounted to 10 650.7 kg, where 14 species accounted for 85.0% of the biomass. Sixty-seven percent of the biomass was for sale, with more th...
14
artículo
Publicado 2022
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The arahuana (arowana) Osteoglossum bicirrhosum (Cuvier, 1829) is a very important resource for ornamental fishing activity in the Putumayo river basin, Loreto, Peru, having developed various studies around this species; however, studies on its reproductive biology are incipient. For this reason, the objective of this study was to describe a scale of gonadal maturity with microscopic support and to determine which is the main period of reproduction of the Arahuana resource in the Putumayo river basin. For this, a monthly biological monitoring was carried out from October 2015 to June 2017. A total of 874 samples were analyzed, obtained from the "El Estrecho" and "Huapapa" areas. The maturity scale was established from the microscopic analysis of gonads, identifying each phase of maturity in females and males from the degree of development and distribution of sexual cells, while the repro...
15
tesis de maestría
Publicado 2018
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El presente estudio se realizó en la microcuenca Juninguillo, la cual se encuentra ubicado en el distrito de Moyobamba, provincia de Moyobamba en el departamento de San Martin, tiene como objetivos determinar las características biofísicas y la determinación del índice de calidad del agua, bajo los criterios considerados por la National Sanitation Foundation (NSF). La metodología empleada fue hacer un reconocimiento del área de estudio mediante la georreferenciación, así como el establecimiento de dos puntos de muestreo tomando en cuenta la parte alta y media de la microcuenca Juninguillo; en cada punto de muestreo se sacaron muestras de agua para evaluar nueve parámetros de calidad de agua recomendados por la National Sanitation Foundation (NSF) los cuales son DBO5, oxígeno disuelto, coliformes fecales, pH, temperatura, nitratos, fosfatos, solidos totales y turbiedad. Los cua...
16
artículo
The genus Abuta constitutes the second most diverse taxon within the Neotropical Menispermaceae. In this research, we document and analyze 12 species recorded within Peruvian territory, presenting comprehensive morphological characterizations of each taxon and compiling these into a dichotomous identification key. We provide photographic documentation of specimens, encompassing both in situ observations and herbarium specimens, for all species with the exception of A. aristeguietae. This study incorporates detailed analyses of geographic distributions at both national and global scales for each species. A significant methodological constraint has been encountered in the limited availability of fertile specimens, which are frequently restricted to a single sex (either staminate or pistillate specimens), thereby presenting substantial challenges for interspecific comparative analyses. Whil...
17
artículo
Publicado 2020
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The veterinary use of medicinal plants practiced by the population of two cattle regions in the montane forests of northern Peru were compared. The objectives of the study were: (1) to collect information on veterinary uses and medicinal plants typical of two cattle regions in the Amazonas Department: Leimebamba and Molinopampa districts; (2) evaluate the influence of socioeconomic factors on veterinary knowledge about medicinal plants; (3) understand the transmission of traditional knowledge between age groups (18-30, 31-40, 41-50, 51-60, >60 years). Semi-structured interviews were carried out (n=120), complementing ethnobotanical questions on socioeconomic aspects. The weight of the socioeconomic factors in the knowledge about medicinal plants and veterinary uses of each basin was done through a multidimensional scal...
18
artículo
Publicado 2020
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The veterinary use of medicinal plants practiced by the population of two cattle regions in the montane forests of northern Peru were compared. The objectives of the study were: (1) to collect information on veterinary uses and medicinal plants typical of two cattle regions in the Amazonas Department: Leimebamba and Molinopampa districts; (2) evaluate the influence of socioeconomic factors on veterinary knowledge about medicinal plants; (3) understand the transmission of traditional knowledge between age groups (18-30, 31-40, 41-50, 51-60, >60 years). Semi-structured interviews were carried out (n=120), complementing ethnobotanical questions on socioeconomic aspects. The weight of the socioeconomic factors in the knowledge about medicinal plants and veterinary uses of each basin was done through a multidimensional scal...
19
artículo
El artículo utiliza una metodología de investigación de tipo descriptivo, analítico, en base a una revisión bibliográfica con el objetivo de analizar la relación entre la gestión sostenible del agua y la gran minería del oro en Perú. Se plantea como objetivos analizar los principales problemas, sus propuestas de solución en los conflictos socio ambientales con la actividad minera del oro, que se presentan en la gestión del agua que realizan los gobiernos locales. Como resultados se encontró que entre los principales problemas que se observan tenemos, afectación de lagunas, actividad minera en cabeceras de cuenca, afectación en la calidad de agua que se usa en la zona de dominios. Y como soluciones se tiene, inspección sanitaria a los sistemas de agua, abastecimiento de agua potable con camiones cisterna. A modo de conclusión, ello refleja que la actividad minera puede es...
20
artículo
Publicado 2007
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En este artículo se discute la complejidad temprana en la cuenca sur del lago Titicaca, en los Andes bolivianos. Se estudia un paisaje regional con formaciones de carácter multicomunal que surgieron durante el Periodo Formativo Tardío (100 a.C.-500 d.C.). Se sugiere que, en esta etapa, el establecimiento de Khonkho Wankane, junto con el de los disembedded centers, es decir, centros con poca población residente, pero a los que llegaban gente en número nutrido para la realización de ceremonias, festines u otras prácticas rituales, tuvo un papel importante en la transformación social que dio origen, por último, a los sistemas políticos centralizados. Sin duda, la actividad política fue un elemento importante de interacción social, pero estuvo involucrada con rituales y otras actividades —tales como la construcción de montículos— que constituyeron una parte primordial de lo...
