Optimum environmental condition of live container for long distance transport in live abalone Haliotis discus hannai

Sung-Jin Yang, Jeong-In Myeong, Jung-Jun Park, and Yun-Kyung Shin
Aquaculture Management Division, Aquaculture Research Institute, NFRDI, Busan 619-902, Korea

We investigated the survival rate by water temperature and salinity, physiological rhythm and morphological change of live abalone to get to know optimum water temperature and salinity suitable for long-distance transportation of live abalone. At 8°C and above, 96-100% of survival rate was shown at all experiment groups. At 6°C, 66% of abalones survived in normal seawater but they showed 0% of survival rate at 30 ± 0.5 psu and 26 ± 0.5 psu of salinity at the same water temperature. There was no significant difference of oxygen consumption rate for a week between the seawater and 30 ± 0.5 psu. Also, a positive correlation was shown between salinity and water temperature and the oxygen consumption rate was slightly higher at 30 ± 0.5 psu than seawater. Thinned epithelial layers and expansion of lymph sinus were observed less than 30 ± 0.5 psu or below 6°C of temperature. This result shows that the optimum level of water temperature and salinity is considered to be 6-8°C and more than 30 ± 0.5 psu respectively.

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