Physiological responses to handling in the turbot

Abstract

Turbot Scophthalmus maximus were cannulated via the afferent branchial artery and were either net-confined in sea water or in air for 9 min to monitor the stress response of a hatchery-reared marine flatfish. No mortality was observed. Aerial exposure appeared to mobilize plasma free fatty acids and stimulate the interrenal tissue but had no effect on circulating glucose or lactate levels. This pattern was qualitatively similar to that induced by net-confinement in sea water, although the magnitude and duration of the changes were more marked in the turbot handled in sea water. Aerial exposure had no effect on plasma osmolality, protein, or Cl concentrations and only a minor effect on plasma Na + concentrations, which was in sharp contrast to the ionoregulatory disturbance noted in turbot which were net-confined in sea water. However, plasma K + and cortisol concentrations were similarly elevated by both handling procedures. The results from these experiments suggest that whilst similarities with the salmonid physiological stress response are apparent, the lack of a plasma glucose response may represent a fundamental difference in turbot stress physiology.1995 The Fisheries Society of the British Isles

Effect of dietary taurine supplementation on growth, digestive enzyme, immunity and resistant to dry stress of rice field eel (Monopterus albus) fed low fish meal diets

“…In this dry stress experience, the results indicated that M. albus could respond quickly under air exposure stress by activating a series of physiological responses (AD and COR secretion), and then increase serum GLU content for meeting energy requirement and accelerate the synthesis of cholesterol to ensure COR secretion to adapt to the dry stress. The similar results was found in turbot (Waring, Stagg, & Poxton 1996) supplementation was significantly higher than the other groups at 2 and 24 hr. Serum T-SOD and CAT activities in the T 0.09 and T 0.15 groups had no significant difference with these in the FM group, while the T-SOD and CAT activities in the FM group was remarkably higher than that in the T 0 group at 2 hr.…”

“…The similar results was found in turbot(Waring, Stagg, & Poxton 1996), sea bream (Pagrus major;Chopin, Arimoto, & Inoue 1996), greenback flounder (Rhombosolea tapirina;Barnett & Pankhurst, 1998) with the increase of the AD or COR secretion, and in coral trout (Plectropomus leopardus and Plectropomus maculatus; Frisch & Anderson 2005) with the increase of serum GLU content when the fish was under stress. Meanwhile, the body also improves antioxidant ability to strengthen its own protection.…”

Influence of sampling conditions on blood chemistry values of Adriatic sturgeon Acipenser naccarii (Bonaparte, 1836)

“…1). In this respect, the sturgeon exhibited a more rapid response than the glycaemia elevation observed in turbot Scophthalmus marimus subjected to handling and multiple net confinements (Waring et al 1996;Waring et al 1997). The initial mean osmolality of 281.6 mOsm/kg rapidly increased, peaked at 288.3 mOsmkg within l h post-stress and then decreased.…”

Physiological responses of over-wintering common carp (Cyprinus carpio) to disturbance by Eurasian otter (Lutra lutra)

“…This might be related to a higher energy output due to stress due to increased lipolysis of TGL to free fatty acids serving as energy source. Aerial exposure and net confinement of hatchery-reared turbot (Scophthalmus maximum L.) led to raised plasma-free fatty acid (FFA) levels instead of GL and lactate (Waring et al 1996). Despite the year-to-year differences in changes of glycid and lipid metabolisms of disturbed carp, a common trend is obvious: observed changes lead to mobilisation of energy reserves in fish disturbed by otter compared to the control group.…”