Barnacle Aquaculture

Barnacle aquaculture:

Based upon the field studies and laboratory cultures, informations have been gathered on the reproductive cycle and larval development of goose barnacles (Molares,Tilves & Pascual1994; Cruz & Hawkins1998; Cruz & Arau¤ jo1999). The results are promising for the acorn barnacles especially A.psittacus and M.azoricus. Culture technologies have been developed in Southern Chile (42˚S) for A.psittacus and efforts have been taken to design and produce artificial collectors for obtaining natural seed and growth technologies for adults in suspended systems and land based tanks. Systems used for the ‘fattening’ phase showed the growth of individuals that signifies with a 15 fold increase in biomass over a period of 18 months. The

2011). Cyprid larvae are most important in the field of marine Biofouling due to settlement and growth of barnacles resulting as an impact from human activity (Aldred N and Clare As, 2008, 2009). The persistent and rapidly reversible mechanism of the cyprids during the search for settlement is unique to the aquatic invertebrates. This serves as a model for the development of temporary adhesion systems (Kovalev AE et al 2012). Studies of cyprids temporary adhesion were difficult and time consuming. This lack of knowledge obtained as a result of observation and experimentation contributed to study the possible mechanism of temporary adhesion. The hypotheses showed evidences related to adhesion strength to different substrata (Yule AB and Crisp DJ, 1983 & Yule AB and Walker G, 1984) and imaging of adhesive deposits on surfaces (Walker, 1984, Clare et al, 1994, Anerson O et al, 2009, Aldred N, 2011). The findings suggested by Nott and Foster were confirmed by laboratory data by Crisp which showed that cyprids of Semibalanus balanoids attaches to the surfaces narrower in diameter than the adhesive discs (Crisp DJ, 1984). Chemical composition of the substratum was very important in deciding the adhesion capacity of temporarily attached cyprids. Irrespective of the chemical nature of the substratum, same adhesion capacity was provided by suction (Yule AB and Crisp DJ, 1983 & Yule DJ and Walker G, 1984). The term cyprid temporary adhesive was given by Walker and Yule after demonstrating the involvement of a liquid secretion in cyprid reversible adhesive (Walker and Yule, 1984). They estimated the thickness of these deposits was in the order of 15nm using scanning electron microscope (Anderson O et al 2009 & Aldred N 2011). This estimate was close to independent values obtained by atomic force microscopy (Phang IY et al, 2008)