In the Canary Islands and in other parts of world where it can be found its natural state, basaltic tephra, or “Picón” as is known locally, commonly used a soilless substrate for crops. The aim this study to learn more about physical properties Islands’ tuff, find simple method predict hydraulic behaviour these substrates due their heterogeneity. To accomplish this, 32 tuff samples were collect...

Details are provided of hybridisation between Polyommatus icarus (Rottemburg, 1775) from East Sussex (UK) and P. celina (Austaut, 1879) Lanzarote (Canary Islands, Spain) under laboratory conditions. Comments also made on natural hybrids Melitaea phoebe M. ornata occurring in Slovenia.

Marine and subaerial erosion of volcanic ocean islands form coastal cliffs shore platforms, particularly during stable sea levels. Posterosional lava flows can spill over these fill the leading to progradation deltas. This work aims analyze this rocky coast setting at island scale assess constructional erosive degradational effects on one edifice. El Hierro Island, Canary Islands, exemplifies a...

DNA sequences were analyzed from 19 populations of J. phoenicea from throughout its range. The sequence data (nrDNA, petN-psbM) revealed that J. phoenicea is clearly divided into two taxa. These taxa have been recognized as var. (subsp.) phoenicea and var. (subsp.) turbinata by Adams (2011) and Farjon (2005). However, the magnitude of the differences in the DNA regions, along with the differenc...

Capsule The breeding foraging and post-breeding dispersal movements of five satellite-tagged Bulwer’s Petrels from the Canary Islands were recorded. Foraging trips lasted 5.6 days in average (n=3), while the mean distance covered was 1261 km, and foraging areas were located over the continental slope and the adjacent pelagic waters, around 1200–2000 m depth and up to 350 km from the colony. Aft...

The chemotherapeutic study of a limited series of steroidal sapogenins from several endemic species of the flora of the Canary Islands is presented here. On the whole, they possess a very weak antibacterial activity, a slight antifungal effect and one of them, vespertilin, displays interesting cytostatic activity (ID50 = 5 micrograms/ml). A pharmacodynamic screening carried out on this product ...

Three new norzoanthamine-type alkaloids, named 2-hydroxy-11-ketonorzoan thamide B (1), norzoanthamide B (2) and 15-hydroxynorzoanthamine (3), were isolated from Zoanthus sp. specimens collected at the Canary Islands. Their structures were determined by interpretation of NMR and HR-ESIMS data. Relative configurations of their chiral centers were proposed on the basis of ROESY spectra and by comp...

A survey of the lichen family Graphidaceae in Macaronesia (Madeira, Canary Islands, and Azores) is presented, with detailed treatments for genera Allographa, Fissurina, Graphis. All other species are listed new records provided. key to all Graphicacy known from Macaronesia, except thelotremoid species, presented. The following newly described: Fissurina azorica, elaiocarpoides, nigrolabiata, To...

Diadema aff. antillarum performs a key role in organizing and structuring rocky macroalgae assemblages in the Canary Islands; increased sea urchin population density can result in the formation of rocky grounds covered with crustose algae. In the Canary Islands this type of system alternates with non-crustose macroalgal systems. However, understanding of the process controlling formation, persi...

R. M. Souto, J. Izquierdo, J. J. Santana, A. Kiss, L. NagyandG. Nagy Department of Physical Chemistry, Faculty of Chemistry, University of La Laguna, E-38200 La Laguna (Tenerife), Spain 2 Department of Process Engineering, University of Las Palmas de Gran Canaria, E-35017 Las Palmas de Gran Canaria, Canary Islands, Spain 3 Department of General and Physical Chemistry, Faculty of Sciences, Unive...