Abstract
The main objective of this investigation was to examine physiological changes occurring within the olive flounder, Paralichthys olivaceus, in the presence of continuous stress factors. The experiment gave continuous stress, and each stress step is as follows: water level reduction (S1), selection process (S2), confinement (S3), air exposure (S4), transportation (S5), and storing in volume 0.5-t (S6) and 50.0-t (S7) rearing tanks for 24 h after transportation. The cortisol concentration showed a trend to continuously rise in response to consecutive stress from transportation from 7.4 ± 0.6 ng/ml in an experimental opening. The concentration showed the highest level, 25.3 ± 4.4 ng/ml, after confinement stress. Glucose concentration in S3 and S4 were increased significantly to 71.0 ± 13.0 and 78.7 ± 7.0 mg/dl, respectively (P < 0.05). Lactic acid was increased significantly from 0.5 ± 0.1 mM (S0) to 9.0 ± 1.2 mM (S4), but it did not recover until 24 h (7.0 ± 1.0 mM) after transportation (S6 and S7) (P < 0.05). Some contents displayed recovery within 24 h, but a longer time would be required for normal physical metabolism to resume after fish experienced stress. Therefore, it would be endangering the survival of this species if the transport were repeated within a 24-h period.
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Hur, J., Park, IS. & Chang, Y. Physiological responses of the olive flounder, Paralichthys olivaceus, to a series stress during the transportation process. Ichthyol Res 54, 32–37 (2007). https://doi.org/10.1007/s10228-006-0370-2
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DOI: https://doi.org/10.1007/s10228-006-0370-2