Effect of β-Glucan on cold-stress resistance of striped catfish, Pangasianodon hypophthalmus (Sauvage, 1878)

S. Soltanian, M.N. Adloo, M. Hafeziyeh and N. Ghadimi
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S. Soltanian: School of Veterinary Medicine, Shiraz University, Shiraz, Iran
M.N. Adloo: Islamic Azad University, Bandar Abbas, Iran
M. Hafeziyeh: Iranian Fisheries Research Organization, Tehran, Iran
N. Ghadimi: Islamic Azad University, Bandar Abbas, Iran

Veterinární medicína, 2014, vol. 59, issue 9, 440-446

Abstract: These experiments were performed to determine the effects of dietary β-glucan on stress responses of striped catfish (Pangasianodon hypophthalmus). Fish were fed for nine weeks with a diet containing 0 (control), 0.5% (G1), 1% (G2) and 2% (G3 group) β-glucan. Subsequently, stress responses were studied by evaluating serum cortisol and glucose levels following a constant 24 h cold shock (from 28 °C to 15 °C). Serum cortisol and glucose concentrations were measured after cold treatments of varying durations (prior to, and after one, 12 and 24 h of cold shock stress, respectively). No differences in serum cortisol and glucose levels were found between control and β-glucan-treated fish. However, the mortality rate was significantly lowered in cold challenged fish fed appropriate doses of β-glucan (in G1 and G2 vs. G3 and control group). The results of the present study demonstrate that a proper administrationβ--glucan in the diet could ameliorate the detrimental effects of a severe stress resulting in a reduction in fish mortality.

Keywords: β -glucan; Pangasianodon hypophthalmus; physiological response (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlvet:v:59:y:2014:i:9:id:7684-vetmed

DOI: 10.17221/7684-VETMED

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