전자저널 > 전자저널 > Growth Characteristics of Juvenile Abalone, Haliotis discus hannai by Commercial Artificial Diet Feeding rate during the Winter Season in Indoor Tank

Growth Characteristics of Juvenile Abalone, Haliotis discus hannai by Commercial Artificial Diet Feeding rate during the Winter Season in Indoor Tank

Byeong-Hak Kim, Jung Jun Park, Maeng-Hyun Son, Tae-Ik Kim and Si-Woo Lee

Southwest Sea Fisheries Research Institute, NIFS, Yeosu 59780,, Korea Inland Fisheries research Institute, NIFS, Gyeonggi-do 12451, Korea

This study investigated the growth characteristics of juvenile abalone when has been rearing as other different feed rates by the commercial abalone formulated feed on indoor tank, during the winter period that was maintaining on the low water temperature. Experimental abalones were use to 1 year old (shell length 29.14 ± 2.56 mm, wet weight 2.9 ± 0.6 g), and it has cultured at six feeding rate groups (0.75 DFW, 1.50 DFW, 2.25 DFW, 3.00 DFW, 3.75 DFW, 4.5 DFW) that were set up the daily feeding rate about total weight (DFW), and two replicated. The average water temperature in the experiment period was 9.7 ± 3.27 ℃. In the monthly change absolute growth rate (AGRSL) and specific growth (SGRSL) of shell length, at January, 3.00 DFW was significantly higher than all feeding rate groups (P < 0.05). And in the monthly change of weight change and weight gain (WG), at March, 3.75DFW was significantly higher than all feeing rate groups (P < 0.05). The growth coefficient of thermal units (TGC) was decreased rapid since January, and 3.75 DFW was show significantly higher than all feeding rate groups (P < 0.05). In monthly change of feed efficiency (FE), at December, the 0.75 DFW was significantly higher than all feeding rate groups (P < 0.05), and in February and March, there was no significant difference between all feeding period. Therefore, In this study, was show that juvenile abalones can do to maintain or increasing from weight to supply commercial artificial diet during winter period when rearing into the indoor tank.

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