Population Density, Size Structure, and Reproductive Cycle of the Comestible Sea Urchin (Echinodermata: Echinoidea) in the Pagasitikos Gulf (Aegean Sea).

is a common grazer that lives in various sublittoral habitats, displaying typical covering behavior; i.e., putts shell-fragments, pebbles, and algae on its test.

Institutionalized nursing staff: planning and developing a specialized educational framework that enhances psychiatric nurses' roles and promotes de-institutionalization.

For centuries psychiatric services were provided by mental health hospitals, which were operating upon bureaucratic principles: strict hierarchies, slow processes and segmentation of duties. Research has shown that psychiatric nursing, as exercised in these traditional settings, has dealt with several problems in relation to: the amount and quality of time spent with patients, the type of duties performed, the lack of autonomy etc. The closure of many psychiatric institutions and their substitution with community-based settings, signified that health professionals should perform a variety of new duties, exhibit new skills and develop new perceptions about their work and the patients.