Comparison of mixed Ultrasound waves with the extracts of Nerium oleander L. on the growth of cyprid barnacles Balanus amphitrite Amphitrite

Abstract

Abstract. This study was conducted to demonstrate the effect of plant extracts from the Nerium oleander L. plant and ultrasound waves of different frequencies (10-50) (20-45) (50-60) (30-65) KHz on the barnacle larvae cyprid of barnacle Balanus amphitrite amphitrite obtained from Nasiriya Thermal Power Station inlet water. Samples were collected bimonthly three replicates. The results of the Oleandrin 1 and 2.5 mg/500 ml showed a an effect of losing the larvae cyprid, 2.5 mg showed an increasing effect on the seventh day. A maximum losing of larvae cyprid was attained when using ultrasonic with con junction of 2.5 mg Oleandrin extract reached 100% on the tenth day