138 resultados para Atlántico Noreste


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Acto de homenaje a D. Carlos Bas Peired (Barcelona, 1922), doctor en Ciencias Naturales (Universidad de Madrid, 1953). Crea la Unidad de Pesquerías dentro del Instituto de Investigaciones Pesqueras de Barcelona (CSIC), y trabaja especialmente en las pesquerías del Mediterráneo y Atlántico Sur africano. Ocupa numerosos cargos, entre los años 70 y 90. Tras su jubilación en 1987, es asesor y profesor visitante de la Facultad de Ciencias del Mar, creando un grupo de investigación de referencia en el ámbito de las pesquerías, estructura el Doctorado en gestión de Recursos pesqueros y la Biblioteca de la Facultad de Ciencias del Mar toma su nombre en 1999. En 2005 es nombrado Doctor Honoris Causa por la Universidad de Las Palmas de Gran Canaria. Hoy en día continúa visitando asiduamente el Instituto de Ciencias del Mar de Barcelona el Institut d?Estudis Catalans y esporádicamente la ULPGC

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[ES] El sector Noreste de la Isla de Gran Canaria muestra un sistema de flujo del agua subterránea de cumbre a costa, con desviaciones hacia el fondo del profundo barranco Guiniguada, donde posiblemente estaban los antiguos nacientes, hoy captados por pozos. Existen en la zona 234 captaciones, fundamentalmente pozos de gran diámetro, de los que 140 están en uso, explotándose la Fm. Sálica a cotas bajas y los materiales del Grupo Roque Nublo a cotas elevadas. La salinidad crece de cumbre a costa por mayor efecto del aerosol marino y menor recarga. La recarga media puede variar desde menos de 20 mm/a en zonas bajas hasta más de 500 mm/a en cumbres, lo que puede suponer de 30 a 50 hm3/año que fluyen por la base de las formaciones volcánicas recientes y el techo de las mas antiguas. Los elevados contenidos en nitrato son atribuibles a la gran superficie cultivada. Cabe que la contaminación continúe creciendo pues parte del NO3 puede estar aún avanzado verticalmente por la gruesa zona no saturada.

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Programa de doctorado: Estudios económicos, sociales y culturales en el Atlántico.

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Programa de doctorado: Fuentes, Métodos e Historiografía para la Investigación en el Mundo Atlántico

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Programa de doctorado: Ecología y Gestión de los Recursos Vivos Marinos

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[ES]Contiene: Ceremonia de inauguración/ José Miguel Álamo Mendoza, Fernando Tuya Cortés, Juan Manuel Afonso López -- Presentación del proyecto MACAROMOD/ Óscar Pérez --- Mesa redonda: Acuicultura sostenible/ Fernando Tuya; Ioannis Karakassis; Ricardo Haroun; Pablo Ávila; Gerence Courois --- Mesa redonda: Efectos sobre hábitats y comunidades/ Óscar Monterroso Hoyos; Daniel Montero; Pablo Sánchez Jerez; Paolo Tomassetti; Rodrigo Riera --- Mesa redonda: Control medioambiental de la acuicultura en jaulas/Pablo Sánchez Jerez; Óscar Monterroso; Paolo Tomassetti; Ioannis Karakassis; Cayetano Collado --- Mesa redonda: Ordenación espacila de la acuicultura/ Alejandro Báez; Monstserrat Gimeno; Pablo Sánchez Jerez; José Carlos Macías; Enrique Haro --- Mesa redonda final/ Fernando Tuya

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Programa de Doctorado: Fuentes, Métodos e Historiografía para la Investigación en el Mundo Atlántico

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[EN] The reproductive biology of the sea cucumber Holothuria sanctori was studied over 24 months (February 2009 to January 2011) at Gran Canaria through the gonad index and a combination of macro- and microscopic analysis of the gonads. Holothuria sanctori showed a 1:1 sex ratio and a seasonal reproductive cycle with a summer spawning: the mean gonad index showed a maximum (3.99±0.02) in summer (June-July) and a minimum (0.05±0.04) between late autumn (November) and early spring (March). Females had significantly wider gonad tubules than males. First maturity occurred at a size of 201 to 210 mm, a gutted body weight of 101 to 110 g and a total weight of 176 to 200 g. Holothuria sanctori shows a typical temperate species reproduction pattern. These results could be useful for managing current extractions of H. sanctori in the Mediterranean and in case a specific fishery is started in the eastern Atlantic region.

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Programa de Doctorado: Fuentes, Métodos e Historiografía para la Investigación en el Mundo Atlántico

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[EN] Preliminary data of the length-weight relationship and reproduction of the bogue Boops boops off Gran Canaria (Canary Islands, Central-east Atlantic) are provided. Two thousand and twenty-one individuals of bogue, ranging from 4 to 34 cm TL, were obtained from purse seine commercial landing. Reproduction parameters as sex determination, duration of spawning season, size at first maturity and GSI variation along time were determinated based on macroscopic evaluation of gonads. The results obtained suggest that bogue is a total spawner, with a long spawning season extending from January to May. Size at first maturity was 16.7 and 17.9 cm TL for males and females, respectively. The length-weight relationship obtained showed a positive allometry in both sexes

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Máster en Gestión Sostenible de Recursos Pesqueros

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[EN] Meiofaunal assemblages from intertidal and shallow subtidal seabeds were studied at two sites (one dominated by volcanic sands and the other by organogenic sands) at Tenerife (Canary Islands, NE Atlantic Ocean) throughout an entire year (May 2000?April 2001). Specifically, we aimed (i) to test for differences in diversity, structure, and stability between intertidal and subtidal meiofaunal assemblages, and (ii) to determine if differences in the meiofaunal assemblage structure may be explained by environmental factors (granulometric composition, availability of organic matter, and carbonate content in sediments). A total of 103,763 meiofaunal individuals were collected, including 203 species from 19 taxonomic groups (Acari, Amphipoda, Cnidaria, Copepoda, Echinodermata, Gastrotricha, Isopoda, Insecta, Kinorrhyncha, Misidacea, Nematoda, Nemertini, Oligochaeta, Ostracoda, Polychaeta, Priapulida, Sipuncula, Tanaidacea, and Turbellaria). Nematodes were the most abundant taxonomic group. Species diversity was higher in the subtidal than in the intertidal zone at both sites, as a result of the larger dominance of a few species in the intertidal zone. The meiofaunal assemblage structure was different between tidal levels at both sites, the intertidal presenting greater temporal variability (multivariate dispersion) in the meiofaunal assemblage structure than the subtidal. Sediment grain size, here quantified by the different granulometric fractions, explained the variability in meiofaunal assemblage structure to a greater extent than the percentage of carbonates, a variable linked to sediment origin. This study revealed differences in diversity, assemblage structure, and variability between intertidal and subtidal meiofauna.

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Programa de doctorado: Estudios económicos, sociales y culturales en el Atlántico

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Programa de doctorado: Estudios económicos, sociales y culturales en el Atlántico

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[EN] The reproductive phenology of three species of Gelidiales, Gelidium canariense, Gelidium arbuscula and Pterocladiella capillacea, was analysed seasonally for a period of one year in two localities on the West coast of Tenerife Atlantic Ocean, Canary Islands, Spain. Considerations are provided on sex ratio, maximum length and branch order of uprights and on the length of the thalli for each sexual and asexual phase of the Canary Islands populations. The three species were characterized by a high percentage of tetrasporophytes, while female and male gametophytes have been observed only in little proportion. Only G. canariense showed gametophytes in all seasons while the occurrence of gametophytes in G. arbuscula and Pterocladiella capillacea demonstrated a clear seasonality.