Geochemical partitioning and possible heavy metal(loid) bioaccumulation within aquaculture shrimp ponds

Limited work has been conducted on trace metal(loid) exchange between sediment, water, feed, and shrimp, particularly in estuarine aquaculture environments. To identify sources the processes controlling bioaccumulation we analyzed paired shrimp samples collected Southwest Bangladesh late dry season (May), as well several common artificial feeds. Additionally, sediment extract from 24-hour laboratory batch experiments an analogue for pond porewater to examine element mobilization sediment. Weak correlations concentrations extracts, bulk indicate equilibrium with was not achieved or ponds, that composition little influence water composition. Aquaculture were similar feed but suggesting is mostly influenced by diet. Although arsenic (As) selenium (Se) present at high waters they often below detection shrimp. However, highly toxic metal thallium (Tl) detected levels pose significant human health risks based calculated target hazard quotient (THQ) values. Thus, further research into potential Tl contamination environments warranted.