An energy budget for the free-swimming and metamorphosing larvae of Balanus balanoides (Crustacea: Cirripedia)

摘要: Analysis of biochemical components and measurements oxygen consumption rates cypris larvae Balanus balanoides (L.) maintained in the laboratory at 10°C for up to 5 weeks after capture shows that lipid is primary energy reserve, although later protein utilised. Initially, cyprids swim freely with an rate ca. 37×10-3 μl O2 h-1 cyprid-1, but within a few days falls 21×10-3 cyprid-1 when they cease swimming explore substratum. The cost metamorphosis was calculated both from loss during metamorphosis; values were 2.8×10-2 3.2×10-2 cal respectively. A budget collated data on respiration composition, whereby per cyprid partitioned into required essential structural (6.8×10-2 cal), needed (3.0×10-2 cal) excess available exploring, which batches studied about 5.0×10-2 cal. This mainly derived utilisation reserves used usually 2 1/2 4 capture. During these measurements, samples taken weekly intervals test settlement success metamorphosis. results showed lose their competence metamorphose successfully approximately same time (3 weeks) supply exploration up.