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Abstract
The study aimed to investigate the effects of various live feeds and stocking densities on the survival and growth rate of bigfin squid in two stages. Stage 1 was from newly hatched to 10 days old, which included two experiments. Experiment 1 involved feeding bigfin squid with four different live food diets: Cobia larvae (Rachycentron canadum), mysidae, postlarvae of vannamei shrimp (Litopenaeus vannamei), and adult artemia. Experiment 2 utilized cobia larvae to rear bigfin squid at three stock densities of 1, 3 and 5 individuals/L. Stage 2 was from 10 to 30 days old, which also included two experiments. Experiment 3 employed three different diets, namely vannamei juveniles, guppies (Poecilia reticulata) and fresh trash fish. Experiment 4 used L. vannamei juveniles to rear bigfin squid at three stock densities of 200, 400 and 600 individuals/m3. Each treatment was conducted in triplicate. Results from Experiments 1 and 2 demonstrated that a diet of cobia larvae and a stocking density of 01 bigfin squid/L yielded the highest survival and growth rates in the squid stage from newly hatched to 10 days old. Results from Experiments 3 and 4 indicated that L. vannamei juveniles and a stocking density of 200 and 400 bigfin squid/m3 resulted in the highest survival and growth rates in the squid stage from 10 to 30 days old. These findings have significant implications for the production of bigfin squid seeds.
Keywords: Sepioteuthis lessoniana, bigfin squid, squid reproduction.