Aspects théoriques et résultats concernant les récifs artificiels réalises en Adriatique

Artificial reefs are able to produce bio-ecological mechanisms for increasing the haulietic production. It is known that mortality reduction during pre-recruitment phase, greater food availability and protection of adults favour the restocking processes and the increase of biological diversity through the development of spatial heterogeneity (gradient of height, different structure orientation, diversified hole shape). In eutrophic areas the colonization of new artificial surfaces by larval biomass of sessile organisms, especially bivalves (mussel, oysters, etc.), also allows the recycling of coastal biochemical energy producing ecological effects (improvement for small scale fishery). Moreover the sessile organisms create niches and microhabitats that will be occupied by criptic fauna. This causes the effect of trophic attraction for many species of fish and macroinvertebrates. Finally the shelter effect for species which require protection, such as moulting Crustaceans or Cephalopods sticking their embryo sacs inside the holes of the substrates, of for cryptic fish fauna (Scorpenids, Gobiids, etc.) ha to be considered.