The objective of this study was to investigate the effect of inbreeding on body weight (BW) at harvest size (130 d of age) and grow-out survival rate (SR) (65–130 d of age) in a nucleus breeding population of Penaeus (Litopenaeus) vannamei. An experiment was designed to generate inbred families the product of sibling matings, as well as groups of families with different inbreeding coefficient…