Demasiado pequeños para sobrevivir

2006

Revista Suroeste, 2023

Una reflexión sobre la batalla de Lepando, a partir de un poema de G.K. Chesterton.

Más allá de plantear soluciones milagrosas, de generar modelos que funcionen a la perfección o confrontar diferentes perspectivas acerca de este u otro problema evidente en la actualidad, el punto neurálgico de este ensayo es evidenciar la labor social de la economía (aspecto olvidado y casi inexistente en los planteamientos establecidos), entendida como la preocupación por el ser humano, por su bienestar y por las necesidades básicas y sentidas del mismo, más que por los datos cuantificables a los que ha sido reducida su existencia.

Una propuesta pedagógica para tomar los medios de comunicación (Televisión) como herramienta para educar en el lenguaje televisivo y generar consulta, reflexión e interés por la investigación en padres, y niños de edad escolar.

Se realizó las mediciones de algunas magnitudes (diámetro interno, diámetro externo, área y espesor), en varios objetos (arandela, esferas y monedas) utilizando distintos instrumentos de medida tales como: la regla, el calibrador pie de rey y el tornillo micrométrico; de los cuales se identificaron cada una de las partes que los componen y sus respectivas funciones.

8 temas para una semana de Gratitud

Saberes y prácticas. Revista de Filosofía y Educación, 2022

El asalto de las "vidas minúsculas" en la academia. Un esbozo historiográfico The assault of the "tiny lives" in the academy. A historiographic sketch O assalto às "pequenas vidas" na academia. Um esboço historiográfico

PERSONAJES: M (4) / F (0) sunday Gorka Jam Al Para la improvisada tropa que, con pocos euros y muchas ilusiones, realizó un periplo inolvidable a través de la península ibérica.

The feeding activity of herbivorous fishes and their impact on coral reefs with different levels of anthropogenic degradation. The feeding activity of three herbivorous fishes (Sparisoma viride, Scarus iserti and Acanthurus coeruleus) and its impact on two coral reefs were studied during the dry (February) and rainy (August) seasons of 2006 in Cuba. One of the reef stations is at the "Acuario" dive point in the Guanahacabibes National Park, and is relatively pristine. The second one is located at the north coast of Havana City facing the Instituto de oceanología (IdO) and is subject to pollution and fishing pressures. Herbivore fish composition was analized, and foraging intensity was measured for all Acanthurid and Scarid species, by counting fish bites in 1 m 2 during five minute intervals (25 replicates). Concurrently, species foraging intensity was measured for juvenile, intermediate, and adult phases, counting fish bites during 10 minutes intervals (10 replicates). Algal consumption rate was estimated using a coefficent of consumed biomass per bite, for each size class. The algal cover was sampled at 20 m linear transects with four replicates at each site. Food items were assessed sampling algae at the observed bitten substrates. Compared to Acuario, herbivores in IdO showed lower species richness and higher density of small size fishes, but large-sized parrotfish was almost absent due to intense fishing. The highest bite rate was observed for the smallest fish size, but net consumption rate was three times greater for medium and great size fishes, which were more abundant in the protected area. Algal cover was lower in Acuario, while in IdO it was very high, and coral cover was very low. In both locations epiphytic algae were the preferred food. These results support generalizations referring to the importance of great size herbivores fishes in controlling excesive algal proliferation on coral reefs. Rev. Biol. Trop. 57 (3): 687-697. Epub 2009 September 30.