Energy Budgets of Pandalid Shrimp Pandalopsis japonica Larvae in the Different Larval Stages

摘要

The energy budget of the larvae of pandalid shrimp, Pandalopsis japonica, reared in the laboratory from zoea to post-larva was investigated. Energy used during the growth of the shrimp larvae was calculated daily for feeding, growth, molting, and metabolism. The total energy used was 16.2 J for the entire larval stage. Molting energy loss was estimated at a total 1.03 J. Energy used for respiration was estimated at a total of 1.85 J. The intake energy by feeding reached a total of 77.69 J. The totalsum of energies used by excretion and egestion was 58.61 J. Larvae assimilated 24.57% of ingested food and used 84.91% for somatic growth. The gross growth efficiency (Kj) was 22.19% for the entire larval stage, and the net growth efficiency (K,) was 90.31%. Maintenance costs were estimated at 9.69% of assimilated energy for the entire larval stage.