The effect of intensive line fishing on the virgin biomass of a tropical deepwater snapper, the crimson jobfish (Pristipomoides filamentosus)

An intensive commercial hook-and-line fishing operation targeted the demersal fisheries resources at Saya de Malha Bank in the Southwest Indian Ocean. Fishing was conducted with 12 dories that were equipped with echo sounders and electric fishing reels and supported by a refrigerated mothership. Over a 13-day period in the 55–130 m depth range, a total of 74.3 metric tons (t) of fish were caught, of which the crimson jobfish (Pristipomoides filamentosus) represented 80%. Catch rates decreased with time and could not be attributed to changes in location, climatic conditions, fishing depth, fishing method, or bait type. The initial virgin biomass of P. filamentosus available to a line fishery at the North Western promontory of Saya de Malha Bank was estimated at 72.6 t through application of the Leslie model to daily catch and effort data. Biomass densities of 2364 kg/km2 and 1206 kg/km were obtained by applying the initial biomass estimates to the surface area and to the length of the dropoff that was fished. The potential sustainable yield prior to exploitation was estimated at 567 kg/km2 per year. The quantity of P. filamentosus caught by the mother-ship-dory fishing operation represented 82% of the initial biomass available to a hook-and-line fishery, equivalent to more that three times the estimated maximum sustainable yield. The results of the study are important to fisheries managers because they demonstrate that intensive line fishing operations have the potential to rapidly deplete demersal fisheries resources.

Contenidos transmedia de las teleseries españolas: clasificación, análisis y panorama en 2013

En este artículo analizamos los contenidos transmedia que tienen como “nave nodriza” las series programadas por las cadenas de televisión tanto nacionales (La 1, Antena 3, Telecinco) como autonómicas (TV3, ETB, TVG, Canal Sur) con producción propia y de estreno en 2013. Son en total 33 títulos, entre los que se encuentran Aída, Frágiles, La que se avecina (Telecinco); El barco, Bandolera, Amar es para siempre, El tiempo entre costuras (Antena 3); Cuéntame, Gran Reserva, Isabel, Águila Roja (La 1), La riera, Polseres vermelles (TV3); DHB, Goenkale (ETB); Matalobos, Padre Casares (TVG) y Arrayán y Flamán (Canal Sur). Hacemos un repaso de los sites de las series, donde se concentran los contenidos transmedia, y proponemos una clasificación de la gran variedad de formatos encontrados, recurriendo a las distintas categorías de touchpoints que permiten el contacto del receptor con la narración televisiva fuera de la pequeña pantalla. Los resultados apuntan a una presencia abrumadora de los contenidos reenvasados o adaptados al nuevo medio o plataforma y a una escasa todavía expansión transmedial con contenidos inéditos, diferenciados por medio y narrativamente relevantes.