Optimizing green mussel density for enhanced growth and agar productionin Gracilaria verrucosa within extensive pond aquaculture

Abstract

Gracilaria verrucosa, a red alga that is used in the manufacturing of agar, has a significant impact on coastal ecosystems and is important in several industrial uses. This study examines the effects of different densities (10, 20, and 30 individuals) of green mussels (Perna viridis) on the growth, agar yield, viscosity, gel strength, and ability to remove lead from water in brackish water pond systems. The research used a randomized complete block design with three replications. The findings indicate that the density of green mussels does not have a substantial impact on agar production, gel strength, or the effectiveness of lead removal. The density of green mussels affects the daily growth rate (DSGR) and viscosity. Lower densities (10 mussels) show better early performance, but these differences diminish throughout time. The presence of consistent salt levels indicates that salinity has less impact on production outcomes. This study elucidates the dynamics between algae and mussels in aquaculture systems, providing recommendations for enhancing production practices and implementing bioremediation strategies.