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Intertidal mollusks are subjected to an intense environmental pressure, from human-induced stressors, mainly harvesting, to competition for food and space with other species. A long-term comparison (1994-2014) of limpet size has been conducted as a surrogate of the state of conservation of these two limpets. Both species showed populations dominated largely by small-sized individuals (<30 mm) and a lack of large adults (>60 mm). The proximity to coastal settlements was not a factor to explain limpet assemblage structure. The temporal (1994e2014) comparative study showed a sharp decrease in the mean size of both limpet species (7 mm in P. aspera and 5 mm in P. candei crenata). Riera, R., O. Pérez, O. Álvarez, D. Simón, D. Díaz, O. Monterroso & J. Núñez. 2015. Clear regression of harvested intertidal mollusks. A 20-year (1994-2014) comparative study. Marine Environmental Research, 113. 56-61.

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Shifts on intertidal benthic communities could be due to high-frequency events, or even by stochastic ones, such as, freshwater runoffs, that may be more frequent in the next decades as a results of climate change. In the Canary archipelago, there are no true rivers but ravines. They discharge material to the sea during heavy rainfalls. Intertidal assemblages are subjected to these perturbations and drastic changes are expected to occur after these events. Meiofauna assemblages provide valuable ecological information about recovery and disappearance of species during these phenomena. More info at. Riera, R., J. Núñez & M.C. Brito. 2012. Influence of a freshwater runoff on temporal variations of an intertidal meiofauna assemblage. Vie et Milieu 62(3): 105-114

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Data on opportunistic sightings of diamond-shaped squid Thysanoteuthis rhombus egg masses in the Canary Islands (Atlantic Ocean) are presented. These data reveal the existence of an important spawning area for diamond-shaped squid around the Canary Islands, in subtropical east Atlantic waters. Thus, it could be feasible a potential development of an artisanal fishery focused on this species, Escánez, A., R. Riera, A.F. González, Á. Guerra. 2012. On the occurrence of egg-masses of diamond-shaped squid Thysanoteuthis rhombus, Troschel 1857 in the subtropical eastern Atlantic (Canary Islands). A potential commercial species? Zookeys 222: 69-76