Publisher : The Korean Society of Fisheries and Aquatic Science
DOI : 10.5657/KFAS.2015.0681
Title & Authors
Optimum Feeding Rates for Growing and Sub-adult Olive Flounder Paralichthys olivaceus Fed Practical Extruded Pellets at High Water Temperature Kim, Sung-Sam; Kim, Kang-Woong; Kim, Kyoung-Duck; Lee, Bong-Joo; Han, Hyon-Sob; Lee, Kyeong-Jun;
We investigated the effects of feeding rate on the growth performance of growing and sub-adult olive flounder Paralichthys olivaceus, and the optimum feeding rate at high water temperature (25-31℃). In experiment I, two replicated groups of fish (113 g) were fed a commercial diet (CD) at rates of 0, 0.7, 1.2, 1.7, 2.2, and 2.4% (satiation) body weight (BW) per day for 4 weeks. In experiment II, two replicated groups of fish (313 g) were fed a CD feeding rates of 0, 0.3, 0.5, 0.7, 0.9, and 1.0% (satiation) BW per day for 4 weeks. In experiment I, the weight gain (WG) and specific growth rate (SGR) of fish fed at 0.7 and 0.9% BW per day was significantly higher than that of unfed fish (0%) and fish fed at 0.3, 0.5, and 1.0% (satiation) BW per day. In experiment II, the WG and SGR increased significantly as feeding rate increased from 0 to 2.2% BW per day, but decreased in the satiation group (2.4%). Broken-line regression analysis of WG showed that the optimum feeding rate of growing and sub-adult olive flounder were 1.98% and 0.55% BW per day, respectively, at the high water temperature.
Sub-adult;Growing;Olive flounder;Feeding rate;High water temperature;