Feb 15, 2021 · 2.1. Experimental animals and systems. Litopenaeus vannamei seedstock (ca. 30 day-old post larvae) were obtained from Claude Peteet Mariculture Center, Gulf Shores, AL and transported to the University of Alabama at Birmingham. Prior to commencement of the trial, shrimp were held in aerated holding tanks and proffered a maintenance feed of stage 1