Potential effects of dietary seaweeds mixture on the growth performance, antioxidant status, immunity response, and resistance of striped catfish (Pangasianodon hypophthalmus) against Aeromonas hydrophila infection

Striped catfish (Pangasianodon hypophthalmus) is one of the important fish species in the world, which is widely cultured in several countries worldwide including Egypt. Aeromonas hydrophila infection showed a high prevalence in the farmed striped catfish negatively affecting its production causing...

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Bibliographic Details
Published in:Fish & shellfish immunology 2021-12, Vol.119, p.76-83
Main Authors: Abdelhamid, Ahmed F., Ayoub, Hala F., Abd El-Gawad, Eman A., Abdelghany, Mohamed F., Abdel-Tawwab, Mohsen
Format: Article
Language:English
Subjects:
Aeromonas hydrophila
Animal Feed - analysis
Animals
Antioxidants
Catfishes
Diet - veterinary
Dietary Supplements
Disease Resistance
Fish Diseases
Functional feed supplements
Gram-Negative Bacterial Infections - veterinary
Immunity
Mortality
Resistance to bacterial infection
Seaweed
Striped catfish
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Summary:Striped catfish (Pangasianodon hypophthalmus) is one of the important fish species in the world, which is widely cultured in several countries worldwide including Egypt. Aeromonas hydrophila infection showed a high prevalence in the farmed striped catfish negatively affecting its production causing economic loss. Therefore, the finding of functional feed supplements with antimicrobial activity is urgently needed. The use of marine seaweeds as feed supplements has produced satisfactory results as antibacterial agents. Accordingly, the present study was designed to evaluate the dietary effects of seaweeds mixture (Ulva lactuca, Jania rubens, and Pterocladia capillacea) extract (SME) on the growth performance, haemato-chemical parameters, antioxidant capacity, immune indices, and resistance of striped catfish fry against A. hydrophila infection. Four isonitrogenous (30% crude protein) diets were prepared to contain 0.0% (control), 1%, 2%, and 3% SME and were fed to striped catfish fry (1.7 ± 0.1 g) up to apparent satiety three times a day for 60 days. After the feeding trial, fish of each treatment were intraperitoneally injected with a virulent A. hydrophila strain and the relative percentage of survival (RPS) was recorded. The growth-stimulating activity of dietary SME was observed especially at 2% and 3% SME treatments. Similarly, haematological parameters (red blood cells, haemoglobin, haematocrit, and white blood cells) and serum protein profile (total protein, albumin, and globulin) were significantly (P 
ISSN:1050-4648
1095-9947
DOI:10.1016/j.fsi.2021.09.043