Hassenrück, Christiane, Reinwald, Hannes, Kunzmann, Andreas ORCID: https://orcid.org/0000-0002-9500-4332, Tiedemann, Inken and Gärdes, Astrid (2020) Effects of Thermal Stress on the Gut Microbiome of Juvenile Milkfish (Chanos chanos). Microorganisms, 9 (1). p. 5. DOI https://doi.org/10.3390/microorganisms9010005.

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Abstract

Milkfish, an important aquaculture species in Asian countries, are traditionally cultured in outdoor-based systems. There, they experience potentially stressful fluctuations in environmental conditions, such as temperature, eliciting changes in fish physiology. While the importance of the gut microbiome for the welfare and performance of fish has been recognized, little is known about the effects of thermal stress on the gut microbiome of milkfish and its interactions with the host’s metabolism. We investigated the gut microbiome of juvenile milkfish in a thermal stress experiment, comparing control (26 °C) and elevated temperature (33 °C) treatments over three weeks, analyzing physiological biomarkers, gut microbiome composition, and tank water microbial communities using 16S amplicon sequencing. The gut microbiome was distinct from the tank water and dominated by Cetobacterium, Enterovibrio, and Vibrio. We observed a parallel succession in both temperature treatments, with microbial communities at 33 °C differing more strongly from the control after the initial temperature increase and becoming more similar towards the end of the experiment. As proxy for the fish’s energy status, HSI (hepatosomatic index) was correlated with gut microbiome composition. Our study showed that thermal stress induced changes in the milkfish gut microbiome, which may contribute to the host’s habituation to elevated temperatures over time.

Document Type:	Article
Programme Area:	PA1
Research affiliation:	Ecology
Refereed:	Yes
Open Access Journal?:	Yes
DOI:	https://doi.org/10.3390/microorganisms9010005
ISSN:	2076-2607
Date Deposited:	14 Jan 2021 11:24
Last Modified:	26 Mar 2024 13:30
URI:	http://cris.leibniz-zmt.de/id/eprint/4492

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