Larval development and metamorphosis of Balanus albicostatus (Cirripedia: Thoracica); implications of temperature, food concentration and energetics
Abstract
The influence of food concentrations (0.5, 1 and 2 x 105 cells ml sup(-1)) and temperatures (20 and 30 degrees C) on the survival, development, organic carbon and nitrogen content of Balanus albicostatus larvae was evaluated The effect of food concentration on the subsequent ageing and metamorphosis of cypris larva was also determined At lower food concentration and temperature, naupliar development duration was prolonged and the rate of metamorphosis of nauplius to cyprid was low The rearing food concentration affected organic carbon and nitrogen content of the nauplii, which was also reflected in non-feeding cyprids A decrease in the carbon content was observed with cyprid ageing at 58 degrees C Metamorphosis was higher in 8-d aged cyprids when compared to 2-d aged cyprids, and was positively influenced by the natural biofilm
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