An Oligochaete as a Potential Food Source for Fish in Aquaculture

Abstract

Abstract The oligochaete Aeolosoma heinprichi was successfully cultured in an aquatic environment with single-cell protein as its sole food source. Aeolosoma heinprichi grew throughout a pH range of 5.0–7.0 and a temperature range of 20–32°C. Decreased pH caused an increased doubling time (DT), i.e., a decreased reproductive rate. Increased temperatures resulted in decreased DT; growth was similar between 25 and 32°C. At pH 7.0 and 25°C, minimum DT was 36 h. Population densities depended on the bottom area of the culture vessel and reached a maximum of 330 organisms/cm2. Moderate concentrations of inorganic ions were toxic to the organism. The oligochaete proved to be an adequate food for fry and adult guppies (Poecilia reticulata) and adult golden shiners (Notemigonus crysoleucas).