An investigation of meat yield and heavy metal concentrations in black mussels (Mytilus galloprovincialis) under and upper harvestable size
Project no. 1140 · Status: Kapanmış · 2017
Summary
In this study, changes in heavy metal concentration and meat yield were investigated by subjecting individuals of the economically importance shellfish species of black mussel (Mytilus galloprovincialis) under harvestable size (I.group) and above harvestable size. Mussel samples were collected from culture area in the Erdek Bay - Marmara Sea and they were separated into 2 groups. At the same time, water temperature, salinity, oxygen, chlorophyll, and seston were monitored monthly intervals. In the result of this study, the maximum concentrations of lead, mercury and copper were found in Group I (0.147 mg/kg) Group II (0.028 mg/kg) and Group II 1.492 mg/kg, in winter, respectively. Both the maximum level of cadmium and zinc were determined in Group I as 0.318 mg/kg and 35.891 mg/kg in autumn, respectively. The maximum arsenic amount was calculated in Group I 0.992 mg/kg in spring. In this research, accumulation of heavy metals in sampled mussel body was found insignificantly between two groups (p>0,05). In current study, the peak of meat yield was calculated 31.06% for Group I and 27.35% for Group II. The lowest meat yield was determined in autumn as 16.32% for Group I, this rate was found as 16.64% for Group II in the same season. Differences of meat yield of mussel were not significant between two groups (p>0.05), whilst significant differences were presented seasonally for each groups (p<0,05). It is determined that obtained results about lead, mercury, cadmium, arsenic, copper, and zinc could be considered in the legal limitations in harvested mussels from cultured area. As a result, these are supposed to be more healthy and safety due to regularly monitoring for human consumption.