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4 January 2024 Rhodobacter sphaeroides Supplementation Enhances Growth Performance and Immunity in Rainbow Trout (Oncorhynchus mykiss)
Seong-Mok Jeong, Sanaz Khosravi, Min-Uk Cho, Sang-Min Lee
Author Affiliations +
Abstract

Jeong, S.-M.; Khosravi, S.; Cho, M.-U., and Lee S.-M., 2023. Rhodobacter sphaeroides supplementation enhances growth performance and immunity in rainbow trout (Oncorhynchus mykiss). In: Lee, J.L.; Lee, H.; Min, B.I.; Chang, J.-I.; Cho, G.T.; Yoon, J.-S., and Lee, J. (eds.), Multidisciplinary Approaches to Coastal and Marine Management. Journal of Coastal Research, Special Issue No. 116, pp. 543-547. Charlotte (North Carolina), ISSN 0749-0208.

Rhodobacter sphaeroides (RB), a purple non-sulfur bacteria, has high protein content and a large number of bioactive substances, such as carotenoids and CoQ10. To investigate its efficacy as a feed additive in aquaculture, we added graded levels of RB in rainbow trout feed and examined the changes in growth, whole-body biochemical composition, blood chemistry, and antioxidant gene expression. This study found that the weight gain and specific growth rate showed a significant response to the increasing dietary RB levels up to 1.5 % (quadratic, P < 0.05). Total bilirubin content decreased with the increasing level of RB in the diet (linear, P < 0.05). Thus, RB can be an effective additive for enhancing growth in the aquaculture of rainbow trout.

Seong-Mok Jeong, Sanaz Khosravi, Min-Uk Cho, and Sang-Min Lee "Rhodobacter sphaeroides Supplementation Enhances Growth Performance and Immunity in Rainbow Trout (Oncorhynchus mykiss)," Journal of Coastal Research 116(sp1), 543-547, (4 January 2024). https://doi.org/10.2112/JCR-SI116-110.1
Received: 6 March 2023; Accepted: 21 April 2023; Published: 4 January 2024
KEYWORDS
aquaculture
carotenoid
feed additive
Oncorhynchus mykiss
Rhodobacter sphaeroides
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