Influence of Water Temperature on Growth and Body Composition of Juvenile Abalone (Haliotis discus hannai) Fed an Artificial Formulated Diet and Macroalgae (Laminaria japonica)

摘要

The effect of water temperature and feed on the growth, survival, and body composition of juvenile abalone (Haliotis discus hannai) fed an artificial formulated diet and a macroalgae (Laminaria japonica) for 12 weeks was investigated. Rearing temperature was maintained at 13 deg C, 16 deg C, 19 deg C by healed and natural sea water temperatures (7.5-10.2 deg C). Shell growth, weight gain, and survival rate of the abalone were affected by water temperature and diel (P<0.05). Survival and growth rateof the abalone fed with the formulated diet and Laminaria at 19 deg C was significantly higher than those of the abalone fed the formulated diet or Laminaria at 13 deg C, 16 deg C, and ambient temperatures (P<0.05). Moisture, crude protein, crude lipid,and ash contents of the soft whole body were affected mainly by diet than rearing water temperature (P<0.05). These indicate that a mixture of formulated diet and macroalgae could improve the growth of the abalone independent of water temperature and heated water could improve the growth of abalone during the winter season.