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Item Registros de ruido radioeléctrico cósmico obtenidos mediante riómetro en Base teniente Rodolfo Marsh, Antártica.(1985) Iribarren, Nelson; Foppiano, Alberto; Eberhard, PatricioEn febrero de 1978 se iniciaron observaciones de ruido radioeléctrico cósmico en la frecuencia de 30 MHz mediante un riómetro instalado por el Instituto Antártico Chileno en las cercanías del Centro Meteorológico Antártico Presidente Frei (CMA *), bajo la responsabilidad de académicos del Instituto de Física (* *) de la Universidad de Concepción. El presente documento contiene copias de los registros originales correspondientes al período comprendido entre el 26 de febrero de 1978 y el 20 de enero de 1979. En el punto 2 se indican el lugar de observación y las características del riómetro y su antena asociada. En el punto 3 se explica cómo se pueden utilizar los registros para obtener estimaciones de absorción radioeléctrica.Item Boletín Antártico Chileno(1981) Instituto Antártico ChilenoItem Notes on the Development of some Benthic Marine Macroalgae of King George Island, Antarctica(1988) Wiencke, ChristianFrom a total number of 29 species of Antarctic macroalgae in 26 species reproductive tissue was found, release of viable spores or gametes was observed in 21 species during two expeditions to King George Island in January/ February 1986 and 1987. Germination and further development has been monitored in laboratory cultures under varied light conditions. Within one year of culture adult plants developed in Gigartina papillosa, Iridaea obovata, Leptosomia simplex, Adenocystis utricularis and Enteromorpha bulbosa. In the latter two species spore release was observed after one year. In the former perennial species formation of reproductive tissue started after one year, maturation, however, is very slow and presumably may take additional five months or more. Growth in some developmental stages is light saturated at very low photon flux densities, total darkness is tolerated for several months. The gamethopyte of Leptosomia simplex, which previously was unknown, is described and microscopic evidence of the mating and fusion process of Aseoseira mirabilis gametes, which previously were regarded as spores, is given.Item Iceberg Sightings During the Chilean SIBEX-Phase II Cruise in the Bransfield Strait, Antarctica, 1985(1986) Schlatter, RobertoIcebergs were counted during SIBEX-Phase II, 1985, according to instructions of the Norsk Polar Research Institute aboard the M/N ALCAZAR. A total of 196 hours of iceberg counts revealed a larger concentration of these on the SE part of the Bransfield Strait. These results agree with the physical oceanographic pattern of that Antarctic sector; but more observations are needed to conclude better causes of their drift and aggregations.Item Presencia de Chile en la Antártica XII(1987) Instituto Antártico ChilenoItem Boletín Antártico Chileno(1985) Instituto Antártico ChilenoItem Presencia de Chile en la Antártica XIV(1989) Instituto Antártico ChilenoItem Boletín Antártico Chileno(1982) Instituto Antártico ChilenoItem Lista sistemática de algas bentónicas antárticas depositadas en el Museo Nacional de Historia Natural de Santiago, Chile(1986) Ramírez, María ElianaEn la presente nota se da a conocer una lista sistemática de 46 especies de algas marinas recolectadas a lo largo de la costa del Territorio Chileno Antártico durante la temporada de verano 1984-1985. El material estudiado se encuentra depositado en el Herbario del Museo Nacional de Historia Natural de Santiago (SGO). Bajo cada especie de la lista se señala: el lugar de colecta, algunas observaciones sobre el hábitat y el numero de herbario correspondiente.