The Growth of Xiphophorus hellerii is Negatively Correlated with Colony Density

Abstract

Xiphophorus fishes serve as important animal models in biomedical research. To investigate colony density influence on growth, we compared 6-, 9-, and 12-month-old fish raised in low- (1 fish/2L), mid- (1 fish/L), and high-density (2 fish/L) in re-circulating aquariums. As expected, the results indicate that fish reared in low-density aquariums exhibit the greatest growth, and fish reared in high-density aquariums result in the least growth.