Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/134371
Title: Effects of hypoxia on the antibacterial activity of epidermal mucus from Chilean meagre (Cilus gilberti)
Authors: Vega, Belinda
Toro-Araneda, Teresa
Alvarado, Juan F.
Cárcamo, Claudia B.
Guzmán, Fanny
Acosta Arbelo, Félix Antonio 
Oliva, Marcia
Serrano, Edison
Galarza, Janeth I.
Álvarez, Claudio A.
UNESCO Clasification: 310502 Piscicultura
Keywords: Antibacterial activity
Aquaculture
Cilus gilberti
Hypoxia
Mucosal immunity, et al
Issue Date: 2024
Journal: Animals 
Abstract: Comprehending the immune defense mechanisms of new aquaculture species, such as the Chilean meagre (Cilus gilberti), is essential for sustaining large-scale production. Two bioassays were conducted to assess the impact of acute and intermittent hypoxia on the antibacterial activity of juvenile Chilean meagre epidermal mucus against the potential pathogens Vibrio anguillarum and Vibrio ordalii. Lysozyme and peroxidase activities were also measured. In general, fish exposed to hypoxia showed a 9–30% reduction in mucus antibacterial activity at the end of hypoxic periods and after stimulation with lipopolysaccharide. However, following water reoxygenation, the activity of non-stimulated fish was comparable to that of fish in normoxic conditions, inhibiting bacterial growth by 35–52%. In the case of fish exposed to chronic hypoxia, the response against V. anguillarum increased by an additional 19.8% after 6 days of control inoculation. Lysozyme exhibited a similar pattern, while no modulation of peroxidase activity was detected post-hypoxia. These results highlight the resilience of C. gilberti to dissolved oxygen fluctuations and contribute to understanding the potential of mucus in maintaining the health of cultured fish and the development of future control strategies.
URI: http://hdl.handle.net/10553/134371
ISSN: 2076-2615
DOI: 10.3390/ani14132014
Source: Animals [ISSN 2076-2615], v. 14
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