Effects of stocking density on survival, growth and biochemical composition of cultured mussels (Mytilus galloprovincialis, Lamarck 1819) from an offshore submerged longline system

Abstract

This study examined an offshore submerged mussel longline system, in the Black Sea, from May 2009 to May 2010. The system was allowed 1 year for spat collection. After a 1-year spat collection period, some spat collectors were left untouched (NS), and some spat collectors were grazed and socked (S) for a grow-out study in May 2009. The effects of stocking density on the growth and survival of the S and NS mussels were examined. The biochemical composition of the mussels was also determined. Environmental factors including temperature, salinity, chlorophyll a, total suspended matter, inorganic matter and organic matter were monitored monthly during the experimental period. In May 2010, the mean length and live weight of the S and NS mussels were 60.46 AE 0.60 mm and 53.34 AE 0.37 mm, respectively, and 20.50 AE 0.50 g and 13.11 AE 0.26 g respectively. Mean moisture and ash were 82.35 AE 0.47% and 6.67 AE 0.44% respectively. Mean carbohydrate, protein and lipid were 27.74 AE 2.40%, 57.68 AE 2.15% and 7.91 AE 0.68% respectively. These results indicate that a submerged offshore mussel culture system in the Black Sea can be commercially convenient. In addition, stock management via thinning out of the spat can considerably increase the marketable size of mussels, reduce harvest time and produce better growth.

Adaptation of cultured mussel Mytilus galloprovincialis Lamarck, 1819 from the northern Adriatic Sea to nearby aquaculture sites and translocation

“…An increase in seawater temperature over the spring to summer season, followed by a decrease in salinity corresponds with the increase of plankton biomass and nutrient enrichment by freshwater influx in Lim Bay experimental station (HAMER et al, 2010). This is followed by an increase in condition index that reaching a maximum in summer as it was detected in several studies (GAREN et al, 2004;YILDIZ et al, 2006;ÇELIK et al, 2012;KARAYÜCEL et al, 2015).…”

Depth and Seasonal Effects on the Settlement Density of Two Mussel Species (Perna Perna and Mytilus Galloprovincialis) in Offshore, Agadir (Morocco)

“…The offshore mussel culture system has been often suggested as a solution to meet the growing demand (Langan & Horton, 2003;Karayücel et al, 2015). Well-protected and bays are preferred than open unprotected areas for mussel culture.…”

The Fatty Acid Composition of Cultured Mussels (Mytilus galloprovincialis Lamarck 1819) in Offshore Longline System in the Black Sea

“…Mytilus galloprovincialis is an important commercial species in several zones of Mediterranean coasts. Despite the large amount of research devoted to characterizing the biology and ecology of M. galloprovincialis in the Black Sea in Sinop [18][19][20][21], information about its biochemistry is very rare. In marine bivalves, some polyunsaturated FAs (PUFAs) are important biochemical constituents, taking part in numerous biochemical processes and representing an energy supply under critical nutritional conditions [6].…”