Silver Nanoparticles Mediated-marine Fungal Amylase Improving Dicentrarchus labrax Larvae Growth Performance | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 48, Volume 26, Issue 3, May and June 2022, Page 817-831 PDF (779.62 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2022.247060 | ||||
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| Author | ||||
| Khouloud M. Barakat et al. | ||||
| Abstract | ||||
| This study investigates the capability of marine Aspergillus flavus amylase (Amy) to synthesize silver nanoparticles (AgNPs) and studies its impact on Dicentrarchus labrax(sea bass)larvae growth performance. Characterization of Amy-AgNPs was carried out by FTIR, UV–Vis’s spectroscopy, and SEM. The effect of Amy-AgNPs on antimicrobial and antioxidant activities was studied. The colloidal brown color of Amy-AgNPs with FTIR analysis indicated that amylases had the responsibility for capping the produced nanoparticles and making them more stable. Spherical Amy-AgNPs had sizes of 22.88 to 26.35 nm. Significantly, Amy-AgNPs inhibited the growth of fish-tested microbes by a maximum zone of inhibition, 13-20 mm and maximum MICs ranged from 1.6 to 6.3 µg/ml. Also, it acted as scavenged DPPH by 31.46 to 94.0 %. Sea bass larval morphometric measurements including mean total length (TL), width (W), total weight (TW), larvae survival percentage (%) and specific growth rate (SGR) were recorded, compared to the control group using different concentrations (1, 5, 10, 20%) of encapsulated Amy-AgNPs during larval feeding regime for a period of four weeks. The results revealed that 5% Amy-AgNPs was significantly the most effective concentration at P < 0.05 and achieved higher survival percentages; 51±2.8% and increased the specific growth rate by 16.23±0.62%. | ||||
| Keywords | ||||
| Fungal Amylase; Silver Nanoparticles; Amy-AgNPs; Sea bass larvae | ||||
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