Impact of Pb Toxicity on the Freshwater Pearl Mussel, : Growth Metrics, Hemocyto-Immunology, and Histological Alterations in Gill, Kidney, and Muscle Tissue.

Pb is one of the most extensively used harmful heavy metals in Bangladesh, and its occurrence in waters affects aquatic organisms significantly. The tropical pearl mussel, was exposed to different concentrations (T 21.93 mgL, T 43.

Optimization of 17α-methyltestosterone dose to produce quality mono-sex Nile tilapia .

The 17α-methyltestosterone is the most common synthetic hormone used in male mono-sex production of Nile tilapia, . The current research aimed at finding out the most effective dose of 17α-methyltestosterone to produce quality Nile tilapia fry. Soon after absorbing the yolk sac, Nile tilapia fry was fed with a mixture of commercial fish feed and 17α-methyltestosterone for 28 days.