한국수산과학회

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kfas, vol. 54, no. 5, pp.761-768, October, 2021
DOI. https://doi.org/10.5657/KFAS.2021.0761

Effect of Acclimation Methods on Physiological Status of Pacific White
Shrimp Litopenaeus vannamei Bred in Low Salinity Biofloc
저염분 바이오플락에서 사육한 흰다리새우(Litopenaeus vannamei)의
해수 순치방법에 따른 혈장성분 및 혈장삼투압 비교

전유현·이종민·김수경1·김수경*
국립수산과학원 서해수산연구소 양식산업과, 1아쿠아시스

This study was carried out to identify an effective method to acclimate low-salinity (4 psu) bred Litopenaeus vannamei
(mean body weight 16±3.3 g) to sea water. The fast acclimation group (FA) was directly exposed to filtered
sea water (32 psu) while the slow acclimation group (SA) was exposed to a slow increase in salinity. Shrimps were
sampled at 0, 1, 3, 6, 12, 24 and 48 h for plasma analyses. The plasma components between experimental groups did
not show significant differences. The hemolymph osmolality (HO) in FA increased significantly after 1 h (P<0.05),
while in SA it started to increase slowly only at 24 h and reached a similar level to that of FA at 48 h. The levels of
Na+ and Mg2+ ions were significantly different between the two treatments (P<0.05), but there was no significant difference
in Ca2+ ion levels. We found that the different methods of acclimation of L. vannamei to sea water do not affect
the plasma components significantly, but lead to changes in the HO and ion levels, it is considerable to acclimate
gradually for at least two days.

Keyword : Acclimation, Pacific white shrimp, Plasma components, Hemolymph osmolality

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