picture

The common octopus (Octopus vulgaris, Cuvier 1797) is a promising species for aquaculture diversification, but the massive mortality during the first life stage is the main bottleneck for its commercial production. A total of 26 independent assays were used, including data from the bibliography and from experiments carried out by our group. Three comparisons were established: (i) crustacean zoeae vs Artemia, (ii) different crustacean zoeae species and (iii) Artemia enriched with marine lecithin (rich in polar lipids-PL and docosahexaenoic acid-DHA) vs previously used Artemia enrichments. The meta-analysis approach allowed a quantitatively review of independent studies with reliable conclusions, avoiding the subjectivity inherent to classical reviews. Check out!!. Garrido, D., V.M. Martín, C. Rodríguez, J. Iglesias, J.C. Navarro, A. Estévez, F. Hontoria, M. Becerro, J.J. Otero, J. Pérez, I. Varó, D.B. Reis, R. Riera, A.V. Skykes & E. Almansa. 2016. Meta-analysis approach to the effects of live prey on the growth of Octopus vulgaris paralarvae under culture conditions. Reviews in Aquaculture. doi:10.1111/raq.12142

picture

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.

picture

Distributional shifts of marine species have recently received attention as a result of increasing man-induced pressures on coastal ecosystems and global climate change (i.e. ocean warming). The southernmost geographical limit of the fucoid Fucus guiryi is the Canarian archipelago where this species is currently forming scarce and low-dense populations. Studies on long-term herbarium data revealed the decrease in size of morphological features. More details in: Riera, R., C. Sangil & M. Sansón. 2015. Long-term herbarium data reveal the decline of a temperate water algae in its range southern limit. Estuarine Coastal and Shelf Science doi:10.1016/j.ecss.2015.05.008