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  • Title: Effects of short-term crowding stress on the gilthead seabream (Sparus aurata L) innate immune response.
    Author: Ortuño J, Esteban MA, Meseguer J.
    Journal: Fish Shellfish Immunol; 2001 Feb; 11(2):187-97. PubMed ID: 11308079.
    Abstract:
    Gilthead seabream specimens were subjected to an intense short-term crowding stress of 100 kg m(-3) for 2 h. After 0, 1, 2, 3 and 4 days, blood glucose and serum cortisol levels, serum complement activity, phagocytic and respiratory burst activities of head-kidney leucocytes, and the percentage of monocyte/ macrophages and granulocytes in head-kidney and circulating blood were determined. An immediate effect of the stress was a depression in complement and phagocytic activities, both of which recovered after 3 or 2 days, respectively, while respiratory burst remained unaffected. The depression of phagocytosis in head-kidney leucocytes seemed to correlate with stress-induced migration of active cells from the organ to circulating blood. The present results point to the importance of minimising intense short-term crowding stress in order to reduce possible states of immunodepression in farmed fish.
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