Microalga marina y su empleo en acuicultura y en la obtenci on de acidos grasos poliinsaturados

Una cepa de la microalga marina isochrysis galbana, depositada en la CCAP con el número de depósito CCAP 927/15 es capaz de producir elevadas cantidades de ácidos grasos poliinsaturados, especialmente de ácido eicosapentaenoico (EPA) y de ácido docosahexaenoico (DHA). La cepa microalgal crece adecuadamente a una temperatura de 18 c a 25 c, en un ph de 7 a 9,5, preferentemente a un ph de 7,65 a 8,00. La cepa microalgal, cultivada a 20 c en un fermentador de 5 litros agitado por paletas y con iluminación continua, produce EPA en una cantidad de, al menos, 39,5 mg por gramo de materia seca. Esta cepa es adecuada para su empleo en acuicultura (alimentación de larvas de peces y moluscos) y en la obtención de EPA y/o de un aceite rico en EPA y en DHA necesarios para la nutrición y salud humanas.

Studio geologico-geomorfologico per la soluzione di problematiche tecnico-applicative nelle località Terra Murata (borgo medievale e costone lato Marina Corricella) e Centane-Panoramica (Isola di Procida, Golfo di Napoli)

Nel presente rapporto tecnico viene illustrato uno studio del dissesto geomorfologico in due aree selezionate dell’Isola di Procida, rispettivamente ubicate nella zona storica di Procida (borgo medievale di Terra Murata lungo la Via Salita Castello-altezza Via S. Domenico) e nell’area costiera che raccorda Punta Pizzaco con Punta Solchiaro (comprensorio Centane-Panoramica). In generale le finalità del rapporto tecnico sono quelle di fornire un inquadramento di queste due zone da un punto di vista geologico, che si differenziano negli aspetti particolari. Infatti, nella zona di Terra Murata, sia nella zona alta del borgo medievale (piazzale oltre le mura) che lungo il costone tufaceo antistante la Marina Corricella (salita Castello all’altezza di Via S. Domenico) sono documentate copiose perdite d’acqua attraverso i terreni vulcanici di natura tufacea e pozzolanica che affiorano nell’area. Tali perdite d’acqua attraverso i terreni interessano anche numerose abitazioni, creando disagi che rendono necessario l’ulteriore accertamento tecnico al fine di individuare, anche tentativamente, le cause di tali dissesti e di proporre soluzioni tecnicamente soddisfacenti a tali problematiche attraverso uno studio approfondito.

Aprendizaje, intereses coloniales y sociedad. Los viajes de la fragata de guerra Alceste de la Marina Francesa por Canarias, 1881-1883

La singular ubicación de las Islas Canarias en la ruta atlántica utilizada por las potencias europeas en el recorrido hacia sus colonias durante el siglo xix llevó a una estrecha relación de la sociedad canaria con países como Reino Unido, Alemania o Francia. El país galo mostró un especial interés por contar con bases marítimas en las Islas. Los distintos viajes de la fragata Alceste comandada por el almirante De Cuverville durante los años 1881 a 1883 muestran la importante situación estratégica de las Islas, las claras intenciones de la nación francesa para con ellas y la aceptación social canaria.

Avances y desafíos de la agenda de cambio climático en la Zona Costero-Marina de El Salvador

Central America is one of the most vulnerable regions to the adverse effects of climate change, due to the rise of frequency and intensity that hydrometeorological phenomena have occurred in recent years. In El Salvador 484 people died and 800,000 more were affected because these extreme events and economic losses reached up to 6.711 million dollars. According to the climate projections over the next 50 years in the territory, is expected that extreme events such as droughts and rainfall will intensify. Within the last 30 years, July of 2014 is considered the one with less rainfall. Meanwhile, Tropical Depression 12E in 2011 provoked an outstanding rainfall average of 1,137 mm, affecting more than 500,000 people; most of them live in the coastal zone. The death of 34 people and living economic losses of 840.4 million was recorded, equivalent to 4% of GDP. El Salvador has policies, national plans and strategies aimed to reducing vulnerability, promoting adaptation to these changes and more effective risk management. This paper compiles the impacts of climate variability in El Salvador and the efforts of the State on adaptation to improve environmental and social resilience.

Texture and composition of the Rosa Marina beach sands (Adriatic coast, southern Italy): a sedimentological/ecological approach

Beach sands from the Rosa Marina locality (Adriatic coast, southern Italy) were analysed mainly microscopically in order to trace the source areas of their lithoclastic and bioclastic components. The main cropping out sedimentary units were also studied with the objective to identify the potential source areas of lithoclasts. This allowed to establish how the various rock units contribute to the formation of beach sands. The analysis of the bioclastic components allows to estimate the actual role of organisms regarding the supply of this material to the beach. Identification of taxa that are present in the beach sands as shell fragments or other remains was carried out at the genus or family level. Ecologi- cal investigation of the same beach and the recognition of sub-environments (mainly distinguished on the basis of the nature of the substrate and of the water depth) was the key topic that allowed to establish the actual source areas of bioclasts in the Rosa Marina beach sands. The sedimentological analysis (including a physical study of the beach and the calculation of some statistical parameters concerning the grain-size curves) shows that the Rosa Marina beach is nowadays subject to erosion.

El límite sur de distribución de Zostera marina L. y Phyllospadix torreyi Watson para el noroeste mexicano

Se analiza el límite sur de distribución de dos angiospermas marinas en México.

Macroalgas epífitas de Zostera marina L. en Bahía Concepción, B.C.S., México

Macroalgas epífitas de Zostera marina L. en Bahía Concepción, B. C. S. México.

Marina Castro, Dioselina Orozco, Alicia Reyes, Virgelina Alvarez, Nery López, Josefina Restrepo y Eli de Vargas, en una congregación popular en la Plaza Principal

Marina Castro, Dioselina Orozco, Alicia Reyes, Virgelina Alvarez, Nery López, Josefina Restrepo y Eli de Vargas, en una congregación popular en la Plaza Principal. Versalles, 1950.