Bernadus Pondan Padang
Aquaculture Section, Faculty of Fisheries and Marine Science, Haluoleo University
Abstract
The effect of different photoperiods (12 h light : 12 h dark, 9 h light : 15 h dark, 6 h light : 18 h dark) on daily feed consumption and gonadal maturation time of abalone Haliotis squamata broodstock was examined in this study. This study used a completely randomized design (CRD) with 3 levels of treatment and 3 replicates. Maintenance of the broodstocks was done by using containers containing 60 l of sea water and each container was filled with 4 animal studies with male and female ratio was 1: 1. Feed given type of seaweed was Gracillaria verucossa and given add libitum. During the 56 days rearing broodstocks was found that daily feed consumption was significantly different between the three treatments (P(0,1) > 0.05). The highest daily feed consumption was obtained at treatment 9 h light : 15 h dark (2.27 g/abalone/day), followed by treatment of 6 h light : 18 h dark (2.25 g/abalone/day), while the lowest was treatment 12 h light : 12 h dark (1.9 g/abalone/day). The time to achieve the fastest gonadal maturition was obtained at 37.33 days (6 h light : 18 h dark), followed by 46.67 days (9 h light : 15 h dark), whereas the longest in the 56 days (12 h light : 12 h dark), and based on ANOVA, the effect of photoperiod on time to gonadal maturation were significantly different (P(0.37) > 0.05). The results of this study indicate that photoperiod had important role on daily feed consumption and time to gonadal maturation of abalone species Haliotis squamata broodstock.
Key words : Abalone, Haliotis squamata, Photoperiod, Daily Feed Consumption, Time Gonad Maturity, Hatchery.
Abalone Community 
Leave a comment