Search results for "IFAS"

Antifascisme et nation. Les gauches européennes au temps du Front populaire

1998

Le aporie della democrazia, Intervento su Antifascismo e identità europea, a cura di A. De Bernardi/P. Ferrari, Carocci, 2004

2005

crisi del paradigma antifascista e retoriche politiche delle nuove destre tra Prima e Seconda Repubblica

2014

Effects of an invasive crayfish on the littoral macroinvertebrates of large boreal lakes are habitat specific

2013

Summary Invasive crayfish are widely acknowledged to have negative effects on benthic food webs in lakes, but few studies have investigated such effects at wider spatial scales and in varying habitats under natural conditions. We examined the effects of introduced signal crayfish (Pacifastacus leniusculus) on the macroinvertebrate assemblages of different habitats in two large boreal lakes. We evaluated whether the density, taxon richness and species composition are altered by the non-native crayfish and whether the responses are similar for stony and vegetated habitats and across a depth gradient. We also studied the influence of crayfish on periphyton biomass at stony sites, as a potentia…

The introduced signal crayfish and native noble crayfish have different effects on sublittoral macroinvertebrate assemblages in boreal lakes

2015

A STUDY ON THE POSSIBLE EFFECT OF TWO CRAYFISH SPECIES ON EPILITHIC ALGAE IN A MOUNTAIN STREAM FROM CENTRAL SPAIN

2006

The effects on epilithic algae of increasing densities of two crayfish species, Austropotamobius italicus and Pacifastacus leniusculus, the latter recently introduced in Spain, have been monitored using riverine enclosures, within a large experimental study on crayfish-macrobenthos interactions in a mountain stream. A 3-month test was carried out for each species using crayfish densities comprising between 0-5 individuals/m2 kept in 1-m2 enclosures. Epilithon was sampled periodically within the enclosures and chlorophyll a, b and c were measured by spectrophotometry. Neither statistically significant positive nor negative effects were observed on algal abundance (Chl concentrations) during …

Predation by signal crayfishPacifastacus leniusculuson fish eggs and its consequences for coregonid recruitment

2015

The character and magnitude of predation by the invasive, ectothermic Pacifastacus leniusculus, a crayfish widely introduced to Europe and Japan from North America, on the eggs of coregonid fishes, vendace Coregonus albula and whitefish Coregonus lavaretus were examined by experimentation, modelling and field data. The present results showed that P. leniusculus has the potential to be very efficient predator of fish eggs under winter conditions, but the predation by P. leniusculus did not significantly decrease production of coregonid larvae during the years with a high P. leniusculus population in the study lake. Hence, the mortality caused by the novel invertebrate predator appeared to co…

Interannual variation in littoral benthic macroinvertebrate communities under contrasting crayfish predation in a large boreal lake

2014

Long term studies are widely used nowadays in many fields of ecology. For instance, records over years represent a valuable tool to monitor and comprehend environmental changes. In freshwater ecology, long term studies are often applied in restoration effect assessments using a before-after-control-impact design. Little is known about the long term effects of freshwater predators on their prey, for example of how crayfish as omnivorous predators affect macroinvertebrate prey communities. Bottom substrate of stony littoral shores in three sites of Lake Päijänne, in Central Finland, were sampled for macroinvertebrates (MI) during five consecutive years and identified mainly to species. Of the…

Identità italiana, paradigma anifascista e crisi dello Stato nazionale tra prima e seconda Repubblica

2011

La Resistenza, entre memoria y revisionismo

2015

La Resistenza es sin duda un momento clave de la historia italiana del siglo XX. Pero, a pesar de haber sido narrada en muchas obras tanto literarias como en ensayos, aún hay detalles e historias que quizás no sean conocidas por el público no especializado. Además, sobre todo en los últimos años, ha habido cada vez un mayor número de obras de periodistas o historiadores que han dado del movimiento una visión bastante alejada de la tradicionalmente dominante. En este artículo queremos dar una idea de estos episodios menos conocidos de la Resistenza partigiana y de la diatriba entre diferentes visiones de la misma. The Resistance is, without doubt, a relevant moment of the Italian history of …