Growth performance and survival of Perinereis nuntia cultured on different sandy substrates

The growth performance, biomass and survival of the marine polychaete (Perinereis nuntia)reared on different sandy substrates were evaluated. For this purpose, larvae of P. nuntia with initial length of 1 cm were collected and cultured on 4 different sandy substrates for 4-month period. The tested sands were collected from Bandargah Beach (Bushehr provience) and graded by screenings to 4 substrates grain size of 4 mm with 4 replications. At the end of the experiment, the worms grown in the sandy bed of less than 0.5 mm had significantly higher final weight and specific growth rate (p