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Abdelhamid AF, Ayoub HF, Abd El-Gawad EA, et al. 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. Fish Shellfish Immunol. 2021;119:76-83doi: 10.1016/j.fsi.2021.09.043.
Abdelhamid, A. F., Ayoub, H. F., Abd El-Gawad, E. A., Abdelghany, M. F., & Abdel-Tawwab, M. (2021). 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. Fish & shellfish immunology, 11976-83. https://doi.org/10.1016/j.fsi.2021.09.043
Abdelhamid, Ahmed F, et al. "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." Fish & shellfish immunology vol. 119 (2021): 76-83. doi: https://doi.org/10.1016/j.fsi.2021.09.043
Abdelhamid AF, Ayoub HF, Abd El-Gawad EA, Abdelghany MF, Abdel-Tawwab M. 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. Fish Shellfish Immunol. 2021 Dec;119:76-83. doi: 10.1016/j.fsi.2021.09.043. Epub 2021 Oct 01. PMID: 34601138.
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Fish Shellfish Immunol. 2021 Dec;119:76-83. doi: 10.1016/j.fsi.2021.09.043. Epub 2021 Oct 01.

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.

Fish & shellfish immunology

Ahmed F Abdelhamid, Hala F Ayoub, Eman A Abd El-Gawad, Mohamed F Abdelghany, Mohsen Abdel-Tawwab

Affiliations

  1. Department of Animal Production, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
  2. Department of Fish Health and Management, Central Laboratory for Aquaculture Research, Agriculture Research Center, Abbassa, Abo-Hammad, Sharqia, Egypt.
  3. Department of Aquatic Animals Diseases and Management, Faculty of Veterinary Medicine, Benha University, Egypt.
  4. Department of Fish Biology and Ecology, Central Laboratory for Aquaculture Research, Agriculture Research Center, Abbassa, Abo-Hammad, Sharqia, Egypt. Electronic address: [email protected].

PMID: 34601138 DOI: 10.1016/j.fsi.2021.09.043

Abstract

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 < 0.05) improved, meanwhile serum alanine and aspartate aminotransferases were significantly (P < 0.05) decreased in fish fed with 2 and 3% SME diets. Serum creatinine and uric acid levels revealed no significant (P > 0.05) differences among the experimental groups. Hepatic malondialdehyde and serum nitrous acid levels were significantly decreased; meanwhile hepatic superoxide dismutase, catalase, and glutathione peroxidase levels were significantly increased in all SME-treated groups than the control one. Also, SME supplementations significantly increased the serum lysozyme, total immunoglobulin, and complement C3 activities with highest values at 2% and 3% SME treatments. Interestingly, after bacterial challenge, fish fed SME-supplemented diet were more resistant with the lowest fish mortality (15%) at the 3% SME diet, which exhibit the highest RPS (81.9%). Meanwhile the control group showed highest mortality (85%). According to the regression fitting curve, the current study recommends using the dietary SME with optimum levels of 2.25-2.5% to improve the growth performance, welfare status, and resistance of striped catfish fry against A. hydrophila infection.

Copyright © 2021 Elsevier Ltd. All rights reserved.

Keywords: Functional feed supplements; Immunity; Mortality; Resistance to bacterial infection; Striped catfish

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